Calibration for Hantek 2D72 ?

amy

Customer Consultation

Hello, I have just received the 2D72 Scope/DMM instrument.

I noticed that the DMM DC volts calibration is off, it reads too high a voltage.

Do you have a service manual, or can you supply me with the calibration procedure to re-calibrate the DMM portion?

I do have a DMM voltage standard that I use to calibrate with.

Thank-you

amy

Reply

How much higher is the measured voltage than the input voltage?
Are other measurements tested correctly?

amy

The measurement accuracy is mentioned in the technical parameters of the product, as shown in the figure below.

amy

Lane replied at 2021-3-11 13:57
Yes, I had realized the specifications, but is there an adjustment pot on the PCB that could be used ...

Sorry, it cannot be done.
If 5V is calibrated, the test deviation of other voltages will be larger.
In addition, this DMM has a resolution of 0.01V in the 40V range, not 0.001V. It depends on the hardware.