The Gain Adjustment For Dcv, Dci, 4W & Freq - Picotest M3500A Service Manual

UP button in the Range area & NEXT button)> ENTER. At the moment,
the DISPLAY will show "calibrating". Please note that if the operation
procedures are failed, the Calibrate Short isn't inserted or the input
setting value is not +0.000000E-1, an Error message will appear (refer
to Table-2).
C. When it's done for the Zero Test, the Display of the M3500A will show Cali
OK. Users can press ESC to exit.
6.3 The Gain Adjustment for DCV, DCI, 4W & FREQ
Please follow the procedures A, B and C to do the adjustment.
A. Connect a standard source and select a specific function and range for
adjustment, and set the Resolution into SLOW 6 1/2 by pressing CONFIG
> ENTER > RESOLUTION > NEXT > SLOW 6 1/2. The standard source
value has to correspond to the specific function and range with full scale
on the M3500A, i.e. multiply 0.9 to 1.1 with full scale. For instance, the
DC full scale's value is 100 mV, the standard output value should be from
90 to 110 mV (refer to Table-1).
B. After lifting the security by pressing UNSECURED > NEXT > CALIBRATE
> ENTER > By using the UP button in the Range area & NEXT button to
input a value which should be the one multiplying 0.9 to 1.1 with full
scale (The display will show "input full scale"), such as the range value of
the DC 100 mV should be between +0.900000E-01 and +1.100000E-01
(refer to table-1) > ENTER to do the adjustment. Please note that if the
operation procedures are failed or the output source value and the
setting value overflow the range, an Error message will appear (refer to
Table-2).
C. When it's done, the Display of the M3500A will show Cali OK. Users can
press ESC to exit. In addition, users have to note that...
When the resistance function is under adjustment, it's available

that users only execute the 4W adjustment because the value on
4W is the same as the value on 2W. In addition, the adjustment for
the range 100MΩ is not supported.
When the DCI function is under adjustment, the adjustment for the

range 3A is not supported.
When the FREQ function is under adjustment, the input voltage has

to be greater than 100 mV.
When the DCV range 1000V is selected, the full scale value after

multiplying 0.9 to 1.1 only can tolerate the voltage from 900 to
1050V at most.
86