how-to check a Diagnosys 32-bit Differential Amplifier's Calibration
1 Enter into the Multifocal folder located in the Computer's C:/ drive.
2 Locate and open armtest.exe.
3 Select the impedance tab.
4 Set Impedance Options to Impedance Test.
The next few steps check for the stored values of each amplifier channel.
5 Change Impedance Display to Stored 0K (ADC).
Note the values in the Chan #-# column on the left side of the armtest window.
Amplifier Serial Numbers 0 - 350, all values should equal ~23,000.
Amplifier Serial Numbers 350 - beyond, all values should equal ~28,000.
6 Change the Impedance Display to Stored 10K (ADC).
Note the values in the Chan #-#(#) column on the right side of this armtest window.
Amplifier Serial Numbers 0 - 350 should list values equal to ~66,000.
Amplifiers Serial Numbers 350 - beyond should list values equal to ~82,000.
There are two possible outcomes of this calibration check.
Outcome #1 .. all of the values fall within the appropriate range. In such case, the stored calibration values are correct.
Outcome #2 .. one or more of the Channels was off target value by 10% or more. In such case, the amplifier's stored values must be reset.
Resetting stored values requires 0K/10K Resistance cables.