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Title: Digital Multimeter HDM3055 Series Manual [Print this page]
Author: WisdomAugust Time: 2022-11-1 15:31
Title: Digital Multimeter HDM3055 Series Manual
Introduction to the Instrument
file:///C:/Users/ADMINI~1/AppData/Local/Temp/ksohtml11136/wps1.pngfile:///C:/Users/ADMINI~1/AppData/Local/Temp/ksohtml11136/wps2.pngfile:///C:/Users/ADMINI~1/AppData/Local/Temp/ksohtml11136/wps3.pngfile:///C:/Users/ADMINI~1/AppData/Local/Temp/ksohtml11136/wps4.pngFront Panel Review
[attach]5232[/attach]
Author: WisdomAugust Time: 2022-11-30 08:11
Front Panel Keys
NOTE Some of the front panel keys have text above them. This indicates that the key has a function
that you can access by pressing and releasing [Shift] before pressing the key. For example, if you press
and release [Shift] before pressing [Display], you will access the [Utility] function:
[attach]5289[/attach]
Author: WisdomAugust Time: 2022-12-1 08:35
[attach]5294[/attach]
Author: WisdomAugust Time: 2022-12-2 07:58
[attach]5298[/attach]
Author: WisdomAugust Time: 2022-12-3 07:56
Firmware Update
Use the following procedure to update instrument firmware:
CAUTION Do not turn off the instrument during the update.
[size=10.5000pt]1. Press [Help] > About to determine what instrument firmware version is currently installed.
[attach]5300[/attach]
Author: WisdomAugust Time: 2022-12-5 08:48
2. Go to
http://hantek.com/ and use the links there to find the latest firmware version. If
this matches the version installed on your instrument, there is no need to continue with this procedure. Otherwise,
download the firmware update utility and a ZIP file of the firmware.
3. Unzip the ZIP file and use the firmware update utility to prepare a USB drive with the updated firmware:
4. Attach the USB drive to the instrument front panel.
[attach]5302[/attach]
Author: WisdomAugust Time: 2022-12-6 08:06
[size=10.5000pt]5. And press [Utility] > Test / Admin > Firmware Update to update the firmware.
[attach]5306[/attach]
[attach]5307[/attach]
Author: WisdomAugust Time: 2022-12-7 08:02
Quick Start
Basic procedures to help you get started quickly with the instrument.
l
Prepare Instrument for Use
Verify that you received the following items. If anything is missing, please contact your Hantek reseller.
l
*1 x Power cord (for country of destination)
l
*1 x Certificate of Calibration
l
*1 x USB 2.0 cable
*1 x Test Clip
*1 x Multimeter probe
Author: WisdomAugust Time: 2023-1-3 13:08
Setting the AC Mains Line Voltage Selector and Fuse Installation
WARNING Before plugging the instrument into AC mains power, verify that the line voltage
setting visible on the back of the AC mains input module is correct for the AC mains power
source being connected. The line voltage selections are shown on the rear panel beneath
of the AC mains input module.
[attach]5326[/attach]
Author: WisdomAugust Time: 2023-1-4 08:39
Verify that the correct fuse is installed. To replace a blown fuse or verify the correct fuse,
pull it gently from the fuse drawer and insert the correct working fuse. Use only a 5x20mm,
time-lag, 0.25 A, 250 V certified fuse.
[attach]5331[/attach]
Author: WisdomAugust Time: 2023-1-5 14:34
[attach]5333[/attach]
Author: WisdomAugust Time: 2023-1-6 13:02
WARNING Product Grounding
The instrument is a Class 1 product and is provided with a grounding-type power cord set.
The instrument chassis and cover are connected to the instrument's electrical ground to
minimize shock hazards.
The ground pin of the cord set plug must be firmly connected to the electrical ground
(safety ground) of the terminal at the power outlet. Any interruption of the protective earth
(grounding) conductor or disconnection of the protective earth terminal will cause a
potential shock hazard that could result in personal injury or death.
Author: WisdomAugust Time: 2023-1-9 08:27
Connect Power and I/O Cables
Connect the power cord, LAN, GPIB, RS232/485, or USB cable as desired.
The instrument's default measurement function is DC Voltage (DCV), with auto-ranging enabled.
Power Switch
Press the power switch in the lower left corner of the front panel. If the instrument does not turn on,
verify that the power cord is firmly connected, that the fuse is good, and that the line voltage selector
is set correctly, as described above. Also, make sure that the instrument is connected to an energized
power source.
To turn off the instrument, press and hold the power switch for about 500 ms. This prevents you from
accidentally turning off the instrument by brushing against the power switch.
NOTE If you turn off the instrument by disconnecting power (this is not recommended), the instrument
turns on as soon as you re-apply power. You will not need to press the power switch.
Author: WisdomAugust Time: 2023-1-9 08:30
Edited by WisdomAugust at 2023-1-10 13:46
Adjust the Carrying Handle
The handle has five positions, shown below.
Author: WisdomAugust Time: 2023-1-10 13:42
Edited by WisdomAugust at 2023-1-12 08:20
To adjust the handle position, grasp the sides of the handle, pull outward, and rotate the handle.
[attach]5355[/attach]
Author: WisdomAugust Time: 2023-2-1 08:20
Use Built-in Help System
The built-in help system provides context-sensitive help on any front panel key or menu softkey.
A list of help topics is also available to help you learn about the instrument.
View the help information for a front panel key
Press and hold any softkey or button, such as [Display].
If the message contains more information than will fit on the display, press the down arrow softkey to scroll down.
Author: WisdomAugust Time: 2023-2-3 08:40
Add Help Example Picture
Press Done to exit Help.
View the list of help topics
Press [attach]5375[/attach] to view the list of help topics. Press the arrow softkeys or use the front panel arrow keys
to highlight the desired topic. Then press Select.
[attach]5376[/attach]
Author: WisdomAugust Time: 2023-2-6 08:12
In this case, the following help topic appears:
[attach]5378[/attach]
View the list of recent instrument errors.
Press [attach]5379[/attach] and choose View instrument errors from the list of help topics.
This displays the instrument's error queue, which includes up to 20 errors.
Author: WisdomAugust Time: 2023-2-7 08:19
Continuous Modes
The multimeter can operate in the continuous mode as described below.
Continuous Mode
Continuous mode is the default mode for all HDM series DMMs. With the factory default settings,
the DMM continuously makes DCV measurements with auto-range and autozero on, NPLC set to
10 PLCs, etc.
[attach]5381[/attach]
Author: WisdomAugust Time: 2023-2-8 08:32
Front Panel Menu Reference
The following table summarizes the front panel keys and the menu structure.
[attach]5389[/attach]
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[attach]5391[/attach]
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[attach]5396[/attach]
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[attach]5404[/attach]
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[attach]5407[/attach]
Author: WisdomAugust Time: 2023-3-3 08:31
[attach]5409[/attach]
Author: WisdomAugust Time: 2023-3-6 10:50
The keys that access a wide range of functions are listed below.
[attach]5411[/attach]
Author: WisdomAugust Time: 2023-3-7 08:31
Title: Software and Driver of RS 4CH Oscilloscope
[attach]5427[/attach]
Author: WisdomAugust Time: 2023-3-8 08:38
[attach]5441[/attach]
Author: WisdomAugust Time: 2023-3-9 13:24
[attach]5444[/attach]
Author: WisdomAugust Time: 2023-3-10 09:09
Measurements
DC Voltage
This section describes how to configure DC voltage measurements from the front panel, including
DCV ratio measurements.
Step 1: Configure the test leads as shown.
[attach]5445[/attach]
Author: WisdomAugust Time: 2023-4-3 08:34
Step 2: Press [DCV] on the front panel.
Step 3:
Press Aperture and choose the number of power-line cycles (PLCs) to use for the measurement.
1, 10, and 100 PLC provide normal mode (line frequency noise) rejection. Selecting 100 PLC provides
the best noise rejection and resolution, but the slowest measurements:
[attach]5459[/attach]
[attach]5460[/attach]
Author: WisdomAugust Time: 2023-4-4 08:13
Step 4:Press Range to select a range for the measurement. You can also use the [+], [-], and
[Range] keys on the front panel to select the range. (Auto (autorange) automatically selects
the range for the measurement based on the input. Autoranging is convenient, but it results in
slower measurements than using a manual range. Autoranging goes up a range at 120% of the
present range, and down a range below 10% of the present range.
[attach]5462[/attach]
Author: WisdomAugust Time: 2023-4-6 08:27
Step 5:
Auto Zero: Autozero provides the most accurate measurements, but requires additional
time to perform the zero measurement. With autozero enabled (On), the DMM internally measures
the offset following each measurement. It then subtracts that measurement from the preceding
reading. This prevents offset voltages present on the DMM’s input circuitry from affecting measurement
accuracy. With autozero disabled (Off), the DMM measures the offset once and subtracts the offset
from all subsequent measurements. The DMM takes a new offset measurement each time you change
the function, range, or integration time. ( There is no autozero setting for 4-wire measurements.)
Author: WisdomAugust Time: 2023-4-7 08:13
Step 6:
Specify the input impedance to the test leads (Input Z). This specifies the measurement
terminal input impedance, which is either Auto or 10 MΩ. The Auto mode selects high impedance
(HighZ) for the 100 mV, 1 V, and 10 V ranges, and 10 MΩ for the 100 V and 1000 V ranges. In most
situations, 10 MΩ is high enough to not load most circuits, but low enough to make readings stable for
high-impedance circuits. It also leads to readings with less noise than the HighZ option, which is
included for situations where the 10 MΩ load is significant.
Author: WisdomAugust Time: 2023-4-8 08:38
DCV Ratio
The DCV Ratio key enables or disables DCV Ratio measurement. Note that the Auto Zero softkey
disappears when you enable DCV Ratio measurements. This is because autozero cannot be disabled
during DCV Ratio.
The ratio is the voltage on the Input terminals divided by the reference voltage. The reference voltage
is the difference of two separate measurements. These measurements are the DC voltages from the
HI Sense terminal to the LO Input terminal and from the LO Sense terminal to the LO Input terminal.
These two measurements must be within the range of ±12 VDC. The reference voltage is always
autoranged, and the range used for both will be based on the larger result of these two measurements.
Configure DCV Ratio measurements as shown:
[attach]5468[/attach]
Author: WisdomAugust Time: 2023-4-10 08:14
AC Voltage
This section describes how to configure AC voltage measurements from the front panel.
NOTE Default delays are selected to give correct first readings for most measurements. For the most
accurate measurements, the input blocking RC time constant must settle to 1/50 of the AC signal level.
Signals greater than 300 V (rms) or 1 A (rms) will cause self-heating in signal-conditioning components.
These errors are included in the instrument specifications. Internal temperature changes due to
self-heating may cause additional error on other functions or ranges. The additional error will generally
dissipate within a few minutes.
For example, consider a 100 mVAC signal with a 10 VDC bias. The 10 VDC bias should be settled to
1/50 of 100 mVAC, or 2 mVDC. The corresponding settling time can be calculated using the blocking
RC time constant of 0.22 s as follows:
settling time = ln(bias/settled value)* 0.22 s
settling time = ln(10 VDC / 2 mVDC)* 0.22 s
settling time = ln(5000)* 0.22 s = 1.9 s
Author: WisdomAugust Time: 2023-4-11 09:33
This additional settling delay should be applied after connecting the signal to the DMM's ACV input
or after selecting the ACV function with the signal already connected. If the DC bias remains constant,
subsequent measurements can be made to full accuracy without additional settling delays.
Step 1: Configure the test leads as shown.
[attach]5473[/attach]
Author: WisdomAugust Time: 2023-5-4 13:14
Step 2: Press [ACV] on the front panel.
[attach]5482[/attach]
Author: WisdomAugust Time: 2023-5-5 08:15
Step 3: Press Range to select a range for the measurement.
(Auto (auto-range) automatically selects the range for the measurement based on the input.
Autoranging is convenient, but it results in slower measurements than using a manual range.
Autoranging goes up a range at 120% of the present range and down a range below 10% of
the present range.
[attach]5484[/attach]
Author: WisdomAugust Time: 2023-5-8 13:11
Step 4: Press AC Filter and choose the filter for the measurement. The instrument uses three different
AC filters that enable you either to optimize low-frequency accuracy or to achieve faster AC settling times
following a change in input signal amplitude.
The three filters are 3 Hz, 20 Hz, and 200 Hz. You should generally select the highest frequency filter whose
frequency is less than that of the signal you measure because higher frequency filters result in faster
measurements. For example, when measuring a signal between 20 and 200 Hz, use the 20 Hz filter.
If measurement speed is not an issue, choosing a lower frequency filter may result in quieter measurements,
depending on the signal that you are measuring.
[attach]5486[/attach]
NOTE For accurately displayed statistics of AC measurements in Front Panel mode, the default manual trigger delay
([Acquire] > Delay Man) must be used.
Author: WisdomAugust Time: 2023-5-9 08:21
DC Current
This section describes how to configure DC current measurements from the front panel.
Step 1: Configure the test leads as shown.
[attach]5488[/attach]
Author: WisdomAugust Time: 2023-5-10 13:22
You can also configure the measurement using the 10 A terminal, which is recommended when
measuring current above 1 A:
[attach]5489[/attach]
Author: WisdomAugust Time: 2023-5-11 09:46
Step 2: Press [DCI] on the front panel.
[attach]5490[/attach]
Step 3: Press the Aperture NPLC softkey and use the up/down arrow keys to specify integration
time in power-line cycles (PLCs) to use for the measurement. 1, 10, and 100 PLC provide normal
mode (line frequency noise) rejection. Selecting 100 PLC provides the best noise rejection and
resolution, but the slowest measurements.
Author: WisdomAugust Time: 2023-5-12 08:28
Step 4
The 3A terminals are selected by default. The Terminals softkey toggles between the 3 A
terminals and the 10 A input terminals. When you change this to 10 A, the measurement range
automatically becomes 10 A.
Author: WisdomAugust Time: 2023-5-15 08:40
Step 5: Press Range to select a range for the measurement. You can also use the [+], [-], and
[Range] keys on the front panel to select the range. (Auto (autorange) automatically selects the
range for the measurement based on the input. Autoranging is convenient, but it results in slower
measurements than using a manual range. Autoranging goes up a range at 120% of the present
range and down a range below 10% of the current range. Press More to switch between the two
pages of settings.
[attach]5493[/attach]
[attach]5494[/attach]
Author: WisdomAugust Time: 2023-5-16 08:20
Step 6: Auto Zero: Autozero provides the most accurate measurements, but requires additional
time to perform the zero measurement. With autozero enabled (On), the DMM internally measures
the offset following each measurement. It then subtracts that measurement from the preceding
reading. This prevents offset voltages present on the DMM’s input circuitry from affecting
measurement accuracy. With autozero disabled (Off), the DMM measures the offset once and
subtracts the offset from all subsequent measurements. The DMM takes a new offset measurement
each time you change the function, range, or integration time. ( There is no autozero setting for 4-wire
measurements.)
Author: WisdomAugust Time: 2023-6-7 09:42
AC Current
This section describes how to configure AC current measurements from the front panel.
Step 1: Configure the test leads as shown.
[attach]5501[/attach]
Author: WisdomAugust Time: 2023-6-8 09:29
You can also configure the measurement using the 10 A terminal, which is recommended when
measuring current above 1 A:
[attach]5502[/attach]
Author: WisdomAugust Time: 2023-6-9 08:26
Step 2: Press [ACI] on the front panel.
[attach]5503[/attach]
Step 3: The 3A terminals are selected by default. The Terminals softkey toggles
between the 3 A terminals and the 10 A input terminals. When you change this to 10 A, the
measurement range automatically becomes 10 A.
CAUTION When making measurements using the 10A terminals, the presence of a signal
on the 3A terminals can cause significant errors.
Author: WisdomAugust Time: 2023-6-12 08:21
Step 4: Press Range to select a range for the measurement. You can also use the [+], [-], and
[Range] keys on the front panel to select the range. (Auto (autorange) automatically selects the
range for the measurement based on the input. Autoranging is convenient, but it results in slower
measurements than using a manual range. Autoranging goes up a range at 120% of the present
range, and down a range below 10% of the present range. Press More to switch between the two
pages of settings.
[attach]5505[/attach]
[attach]5506[/attach]
Author: WisdomAugust Time: 2023-6-13 08:03
Step 5: Press AC Filter and choose the filter for the measurement. The instrument uses three
different AC filters that enable you either to optimize low frequency accuracy or to achieve faster
AC settling times following a change in input signal amplitude.
The three filters are 3 Hz, 20 Hz, and 200 Hz, and you should generally select the highest frequency
filter whose frequency is less than that of the signal you are measuring, because higher frequency
filters result in faster measurements. For example, when measuring a signal between 20 and 200 Hz,
use the 20 Hz filter.
If measurement speed is not an issue, choosing a lower frequency filter may result in quieter
measurements, depending on the signal that you are measuring.
[attach]5512[/attach]
NOTE For accurate displayed statistics of AC measurements in Front Panel mode, the default manual
trigger delay ([Acquire] > Delay Man) must be used.
Author: WisdomAugust Time: 2023-6-14 08:30
Resistance
This section describes how to configure 2-wire and 4-wire resistance measurements from the front panel.
Step 1: Configure the test leads as shown.
2-wire Resistance:
[attach]5513[/attach]
Author: WisdomAugust Time: 2023-6-15 08:20
[size=11.0000pt]4-wire Resistance:
[attach]5517[/attach]
Author: WisdomAugust Time: 2023-6-16 09:01
Step 2: Press [Ω2W] or [Ω4W] on the front panel. The following menu appears. (The Ω4W menu
does not include Auto Zero.)
[attach]5519[/attach]
Step 3: The Aperture NPLC softkey is selected by default. Use the up/down arrow keys to specify
integration time in power-line cycles (PLCs) to use for the measurement. 1, 10, and 100 PLC provide
normal mode (line frequency noise) rejection. Selecting 100 PLC provides the best noise rejection
and resolution, but the slowest measurements.
Author: WisdomAugust Time: 2023-6-17 08:18
Step 4: Press Range to select a range for the measurement. (Auto (autorange) automatically
selects the range for the measurement based on the input. Autoranging is convenient, but it results
in slower measurements than using a manual range. Autoranging goes up a range at 120% of the
present range, and down a range below 10% of the present range.
[attach]5522[/attach]
Press More to switch between the two pages of settings.
[attach]5523[/attach]
Notice the amount of test current sourced is shown for each range. After selecting a range, the main
resistance menu is displayed.
Author: WisdomAugust Time: 2023-6-19 09:18
Step 5: Auto Zero: Autozero provides the most accurate measurements, but requires additional
time to perform the zero measurement.With autozero enabled (On), the DMM internally measures
the offset following each measurement. It then subtracts that measurement from the preceding
reading. This prevents offset voltages present on the DMM’s input circuitry from affecting
measurement accuracy. With autozero disabled (Off), the DMM measures the offset once
and subtracts the offset from all subsequent meaurements. The DMM takes a new offset
measurement each time you change the function, range, or integration time. ( There is no
autozero setting for 4-wire measurements.)
Author: WisdomAugust Time: 2023-6-20 09:08
Negative Resistance Measurements
Under certain conditions, the instrument may report negative resistance measurements. These may
occur in 2-wire and 4-wire resistance measurements or continuity measurements.
Conditions that may cause negative ohms values include:
l Changes in Front/Rear switch contact resistance
l Reversed Sense Hi and Lo leads
l Circuits with external bias or thermal voltages at circuit connections
l Changes in measurement connection after a NULL operation
Under the same conditions, the DMM returns the measurement’s absolute value so as to prevent
confusion associated with negative readings. The Hantek HDM Series DMMs will return negative
values. This allows the most accurate results after a NULL operation.
Author: WisdomAugust Time: 2023-6-21 10:01
Temperature
This section describes how to configure 2-wire and 4-wire temperature measurements from the front panel.
Temperature measurements require a temperature transducer probe. The supported probes are 2-wire and
4-wire RTDs, 2-wire and 4-wire thermistors.
Step 1: Configure the test leads as shown.
2-wire Temperature:
[attach]5525[/attach]
Author: WisdomAugust Time: 2023-6-25 11:54
4-wire Temperature:
[attach]5527[/attach]
Author: WisdomAugust Time: 2023-7-1 08:11
Step 2: Press [Temp] on the front panel. The following menu appears.
[attach]5532[/attach]
Author: WisdomAugust Time: 2023-7-3 08:30
Step 3: Press Probe and choose the probe type.
Additional settings for each probe type are described in the sections below.
For the RTD 2w or RTD 4w Probe Type...
If you choose to use an RTD, the menu will have a softkey to specify the RTD's resistance at 0
degrees Celsius (R0 ). Default 100 Ω
[attach]5533[/attach]
For 2-wire measurements, an Auto Zero softkey is available.
Auto Zero: Autozero provides the most accurate measurements, but requires additional time to
perform the zero measurement. With autozero enabled (On), the DMM internally measures the
offset following each measurement. It then subtracts that measurement from the preceding reading.
This prevents offset voltages present on the DMM’s input circuitry from affecting measurement
accuracy. With autozero disabled (Off), the DMM measures the offset once and subtracts the
offset from all subsequent measurements. The DMM takes a new offset measurement each
time you change the function, range, or integration time. ( There is no autozero setting for 4-wire
measurements.)
For the Thermis2w or Thermis4w Probe Type...
For the Thermis2w probe type, an additional Auto Zero setting is available.
Author: WisdomAugust Time: 2023-7-10 08:19
Step 4: Press Aperture and choose the number of power-line cycles (PLCs) to use for the
measurement. Only 1, 10, and 100 PLC provide normal mode (line frequency noise) rejection.
Selecting 100 PLC provides the best noise rejection and resolution, but the slowest measurements:
[attach]5541[/attach]
Author: WisdomAugust Time: 2023-7-11 08:16
Step 5: Use the Units softkey to display temperature in degrees Celsius, degrees Fahrenheit, or Kelvin.
Thermistor Requirements
The DMM converts the measured thermistor resistance to temperature using the Steinhart-Hart thermistor equation:
1?T = A + B (Ln(R)) + C (Ln(R))3
A, B, and C are constants provided by the thermistor manufacturer and derived from three
temperature test points.
R = Thermistor resistance in Ω.
T = Temperature in degrees K.
Important: Use only a 5 k? 44007-type thermistor. This type thermistor has constants of A = 1.285e-3, B = 2.362e-4,
C = 9.285e-8. Using an incorrect type of thermistor can result in errors greater than 20 °C for a temperature being
measured of 100 °C.
Author: WisdomAugust Time: 2023-7-12 08:12
Capacitance
This section describes how to configure capacitance measurements from the front panel.
Step 1: Configure the test leads as shown.
[attach]5543[/attach]
Author: WisdomAugust Time: 2023-7-13 08:29
Step 2: Press
[attach]5549[/attach]
[attach]5550[/attach]
on the front panel.
Step 3: To null–out the test lead capacitance:
l Disconnect the + and - test leads probe end from the test circuit, and leave open.
l Press Null. The DMM will now subtract this null value from capacitance measurements.
Author: WisdomAugust Time: 2023-7-14 08:21
Step 4: Press Range to select a range for the measurement. You can also use the [+], [-], and
[Range] keys on the front panel to select the range. (Auto (autorange) automatically selects the
range for the measurement based on the input. Autoranging is convenient, but it results in slower
measurements than using a manual range. Autoranging goes down a range at less than 10% of
range and up a range at greater than 120% of range. For capacitance measurements only, when
autorange is off, the instrument does not report an overload for readings greater than 120% of range.
Overload only occurs when the algorithm times out because the applied capacitance is too large for
the algorithm to measure. If you apply a DC voltage or a short to the input terminals in capacitance
measurement mode, the instrument reports an overload.
[attach]5555[/attach]
Author: WisdomAugust Time: 2023-7-15 08:14
Continuity
This section describes how to configure continuity tests from the front panel.
Step 1: Configure the test leads as shown.
[attach]5557[/attach]
Author: WisdomAugust Time: 2023-7-18 09:41
Step 2: Press [Cont] on the front panel to open a menu where you can enable or disable the beeper
for all functions that use the beeper (limits, probe hold, diode, continuity, and errors).
[attach]5558[/attach]
Author: WisdomAugust Time: 2023-7-19 08:19
Continuity measurements behave as follows:
[attach]5562[/attach]
Author: WisdomAugust Time: 2023-7-20 08:22
Diode
This section describes how to configure diode tests from the front panel. The range and resolution
are fixed; the range is 10 VDC (with a 1 mA current source output).
Step 1: Configure the test leads as shown.
[attach]5563[/attach]
Author: WisdomAugust Time: 2023-7-21 08:12
Step 2: Press [attach]5565[/attach] on the front panel to open a menu that specifies
whether the DMM will beep to indicate a successful diode test.
[attach]5566[/attach]
Diode measurements behave as follows:
[attach]5567[/attach]
Author: WisdomAugust Time: 2023-7-24 08:24
Frequency and Period
This section describes how to configure frequency and period measurements from the front panel.
Step 1: Configure the test leads as shown.
[attach]5578[/attach]
Author: Eastojamson Time: 2023-7-25 14:58
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Author: WisdomAugust Time: 2023-8-1 08:34
Step 2: Press [Freq] on the front panel and then use the first softkey to choose either frequency
or period measurement.
[attach]5580[/attach]
Step 3: Press Range to select a range for the measurement. (Auto (autorange) automatically
selects the range for the measurement based on the input. Autoranging is convenient, but it results
in slower measurements than using a manual range. Autoranging goes up a range at 120% of the
present range, and down a range below 10% of the present range.
[attach]5581[/attach]
Author: WisdomAugust Time: 2023-8-2 08:23
Step 4: Press AC Filter and choose the filter for the measurement. The instrument uses three
different AC filters that enable you either to optimize low frequency accuracy or to achieve faster
AC settling times following a change in input signal amplitude.
The three filters are 3 Hz, 20 Hz, and 200 Hz, and you should generally select the highest
frequency filter whose frequency is less than that of the signal you are measuring, because
higher frequency filters result in faster measurements. For example, when measuring a signal
between 20 and 200 Hz, use the 20 Hz filter.
If measurement speed is not an issue, choosing a lower frequency filter may result in quieter
measurements, depending on the signal that you are measuring.
[attach]5582[/attach]
Author: WisdomAugust Time: 2023-8-3 08:54
Step 5: Press Gate Time and choose the measurement aperture (integration time) of 10 ms,
100 ms (default), or 1 s.
[attach]5583[/attach]
Step 6: Press Timeout to control how long the instrument waits before timing out on a frequency
or period measurement when no signal is present. When set to 1s, the instrument waits 1 second
before timing out. When set to Auto, the wait time varies with AC filter bandwidth; for the faster
bandwidths, the instrument waits a shorter time before timing out and returning 0.0. This is
advantageous in manufacturing test systems where a DUT failure may result in no signal;
in this case, the failure can be detected sooner, speeding up test throughput.
[attach]5584[/attach]
NOTE For accurate displayed statistics of AC measurements in Front Panel mode, the default manual
trigger delay ([Acquire] > Delay Man) must be used.
Author: WisdomAugust Time: 2023-8-4 08:09
Secondary Measurements
Most measurement functions allow you to select and display a secondary measurement function.
Secondary measurements can be displayed in the Number and Bar Meter displays only. For example,
a thermistor temperature measurement (primary) and the resistance measurement made on the
thermistor (secondary) are shown below:
[attach]5585[/attach]
Author: WisdomAugust Time: 2023-8-7 08:09
To select a secondary measurement from the front panel, first select the primary measurement
function and then press Display:
[attach]5589[/attach]
Press 2nd Meas and select the secondary measurement.
The primary measurement functions and their associated secondary measurements for each DMM
model are:
[attach]5590[/attach]
Author: WisdomAugust Time: 2023-8-8 08:15
Where:
l Sensor - The raw sensor value; ohms for thermistor/RTD.
l Input/Ref - The DC signal voltage and the DC reference voltage measurements.
1 After making one or more primary measurements for approximately 4 seconds, the DMM makes
one secondary measurement.
Triggering and Readings
The trigger model and large reading memory provide versatile capabilities for a wide variety of applications.
Author: WisdomAugust Time: 2023-8-9 08:13
Instrument trigger model
Acquiring measurements on the DMM is done as the result of triggering. This section describes
how to configure triggering.
Pressing [Acquire] opens the following menu:
[attach]5595[/attach]
Author: WisdomAugust Time: 2023-8-10 08:19
The menus above allow you to configure measurement triggering, and you can also use the VMC
Out softkey to set the edge slope of the VM Comp (voltmeter complete) output on the instrument's
rear panel. This connector issues a signal whenever the voltmeter finishes taking a measurement to
allow you to signal other devices in a measurement system.
For accurate displayed statistics of AC measurements in Front Panel mode, the default manual trigger
delay ([Acquire] > Delay Man) must be used.
The (Trg Src) menu allows you to select one of these trigger sources:
[attach]5596[/attach]
Author: WisdomAugust Time: 2023-8-11 08:56
Auto - the instrument continuously takes measurements, automatically issuing a new trigger as
soon as a measurement is completed.
Single - the instrument issues one trigger each time the front panel [Single] key is pressed.
Ext - the instrument issues one trigger each time an edge of the appropriate slope arrives at the
rear-panel Ext Trig connector. You can specify the slope on the softkey menu that appears when
Trg Src is set to Ext.
In the Single, and Ext modes, you can specify the number of samples to be taken per trigger by
using the Samples/Trigger softkey. The Single and Ext modes can both buffer up to one trigger,
meaning that if you press [Single] or receive an external trigger while a series of measurements
is in progress, the instrument will finish that series of measurements and then immediately launch
a new series of measurements based on the trigger.
Author: WisdomAugust Time: 2023-8-12 10:26
If multiple [Single] or external triggers are issued during a series of measurements, all triggers
received after the first are discarded.
The [Acquire] menu also configures the delay that occurs before each measurement is taken,
regardless of the trigger mode (Auto, Single, or Ext). This may be either automatic (the delay is
based on the DMM’s settling time) or manual (you specify the delay time).
Finally, note the [Run/Stop] and [Single] keys on the front panel. In Auto trigger mode, pressing
[Run/Stop] stops and resumes measurements, and pressing [Single] switches the instrument to
single trigger mode. In the Single and Ext modes, pressing [Run/Stop] stops readings if they are
in progress, or switches the mode to Auto if readings are stopped.
Author: WisdomAugust Time: 2023-8-14 08:08
Trigger delay and multiple samples
The instrument inserts a trigger delay between the occurrence of a trigger and the first measurement.
When Auto is used (Delay Auto softkey), the instrument automatically determines the delay based
on function, range and integration time. However, you may need to manually set a delay (Delay Man
softkey) longer than the automatic delay to allow the input to settle before pacing a burst of measurements,
for measurements with long cables, or for measurements of high capacitance or high impedance signals.
If you have configured the instrument for more than one sample per trigger (Samples /Trigger softkey),
in all cases, the first sample is taken one trigger delay time after the trigger occurs.
Author: WisdomAugust Time: 2023-8-15 08:06
Storing and clearing readings
You can store up to 1,000 measurements in the reading memory. Readings are stored in a first-in,
first-out (FIFO) buffer; when reading memory is full, the oldest readings are lost as newer readings
are taken.
In Local (front panel) mode, the instrument collects readings, statistics, trend chart and histogram
information in the background, so if you select any of those options, the data is ready for viewing.
In Remote (SCPI) mode, the instrument does not collect this information by default.
Changing the instrument from Local to Remote does NOT clear any readings in memory. Changing
the instrument from Remote to Local DOEs clear any readings in memory.
In general, you turn the reading of measurements on and off by pressing [Run/Stop], as described
above.
Author: WisdomAugust Time: 2023-8-16 08:12
You can also take one reading or a specified number of readings by pressing [Single].
To save readings, press [Acquire] > Save Readings. Then use the menu that appears to configure
the location where you want to save the readings:
[attach]5605[/attach]
When finished configuring reading storage, press Done > Save Readings to save the readings in
memory to a file.
Author: WisdomAugust Time: 2023-9-1 15:07
Clearing Reading Memory
The following actions clear reading memory:
l Changing the measurement function
l Pressing any Clear Readings softkey
l Transitioning in or out of Probe Hold
l Changing temperature units
l Changing any dB/dBm parameters
l Changing any histogram binning parameter
l Changing the temperature probe or R0
l Recalling a stored state
l Calibrating the instrument
l Switching between 3 A and 10 A inputs
l Changing the position of the Front/Rear switch
l Transferring from Remote to Local mode
l Turning Null on or off or changing the Null value
Author: WisdomAugust Time: 2023-9-4 08:21
These actions do not clear reading memory:
l Changing measurement parameters, such as range and aperture.
l Turning limits on or off, or adjusting limit values
l Pressing [Run/Stop] in front panel auto trigger mode
l Changing the trend chart Recent/All softkey
l Changing samples per trigger or trigger delay
l Changing display modes
l Changing the VM Comp output polarity
l Changing the digit mask
l Changing the histogram, bar meter, or trend chart scale
l Changing user preferences
l Executing self-test
Author: WisdomAugust Time: 2023-9-5 08:49
Probe Hold
Because probing small areas requires careful concentration, it is often difficult to read the instrument
display while taking measurements. Therefore, the instrument includes a front panel [Probe Hold]
key that allows you to take readings without viewing the display. You can generate up to eight readings
and hold them on the display for later viewing. These readings may be of different measurement types
and you may clear displayed readings at any time.
[attach]5610[/attach]
Author: WisdomAugust Time: 2023-9-6 08:35
In Probe Hold mode, the instrument optimizes measurement settings to allow reliable detection of
stable signals (these settings are restored to their original values when you exit Probe Hold.) When
you probe a signal, the instrument beeps (if the beeper is enabled) and automatically records a
measurement when it finds a series of stable readings. You may take additional readings without
pressing [Probe Hold] again.
Press Remove Last to remove the last reading from the list. Press Clear List to remove all
readings from the list.
Because the Probe Hold display is optimized for the Probe Hold readings, you may not combine
it with other display modes, such as histogram, bar graph, trend chart, or statistics.
Probe Hold is a front panel only function. Readings recorded in Probe Hold mode cannot be
accessed from remote. You can, however, take a screen capture of the probe hold display,
see Utility Menu - Manage Files for details.
Author: WisdomAugust Time: 2023-9-7 08:22
Math - Introduction
The [Math] key is the shifted [Null]:
[attach]5611[/attach][attach]5612[/attach]
These math functions are available:
[attach]5613[/attach]
Null
l dB/dBm Scaling
l Statistics
l Limits
Author: WisdomAugust Time: 2023-9-8 09:14
Math - Null
A null reading is a value that is subtracted from all subsequent measurements. The value is specific
to the present function and will persist even if you leave this function and return to it later.
One common use of this feature is to remove lead resistance from a resistance measurement. To do
this, simply short the test leads together and press [Null]. For other measurement functions, place
the probes across a null value circuit before pressing [Null].
You can also specify a null value by pressing [Math], changing the first softkey to Value, and entering
the value using the arrow keys. To turn off the null feature, press [Null] again or press [Math] and set
the first softkey to Off.
[attach]5614[/attach]
Author: WisdomAugust Time: 2023-9-9 08:17
Math - dB/dBm Scaling
The dB and dBm scaling functions, which apply to ACV and DCV measurements only, allow you
to scale measurements relative to a reference value.
NOTE Scaling is set to OFF when you change measurement functions (for example, changing
from DCV to ACV). You must re-enable scaling after changing measurement functions.
Front Panel Menus
The dB and dBm functions are accessed from the second softkey in the [Math] menu.
[attach]5615[/attach]
Author: WisdomAugust Time: 2023-9-11 08:23
NOTE For accurate displayed statistics of AC measurements in Front Panel mode, the default
manual trigger delay
([Acquire] > Delay Man) must be used.
The first softkey on this menu (shown below) hides or shows the statistics below the data display
(number, bar meter, trend chart, or histogram).
[attach]5616[/attach]
Author: WisdomAugust Time: 2023-9-12 08:08
Remarks
l The Span value is the Max minus the Min.
l Press Clear Readings to clear reading memory and re-start statistics calculation.
Math - Limits
Limit checking indicates how many samples have exceeded specified limits and visually indicates when
the limits are exceeded.
Front Panel Menus
The limits menu is accessed from the [Math] menu.
[attach]5617[/attach]
Author: WisdomAugust Time: 2023-9-13 08:12
The first softkey enables or disables limits. The second and third softkeys specify the limits either
as high and low values or as a span around a center value. For example, a Low limit of -4 V and
a High limit of +7 V are equivalent to a Center of 1.5 V and a Span of 11 V.
[attach]5618[/attach]
Author: WisdomAugust Time: 2023-9-14 08:28
[attach]5619[/attach]
The Beeper softkey enables or disables beeping when limits are violated (this also enables or
disables the beeper for the other functions that use the beeper - probe hold, diode, continuity,
and errors. Clear Condition resets the limit borders to green, as described below.
Author: WisdomAugust Time: 2023-9-15 08:13
Limit Indications
The display uses colors to indicate limits and limit violations.
Trend Chart
The limit area is shown in light red on the graph. The limit borders are green (shown below) as long
as the limits have not been exceeded.
[attach]5620[/attach]
Author: WisdomAugust Time: 2023-9-18 08:28
When a limit is exceeded, the border turns red. In the image below, the top border is still green,
but the bottom border has changed to red because the trend line has gone into the lower limit area.
[attach]5628[/attach]
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