Specifications

D1500 Data Sheet D-6
Step 1: power up the unit under test and let it warm up for at least two
minutes.
Step 2: set the voltage source to 0 volts (short). Perform a TZ+00000.00
(Trim Zero) command to eliminate any common-mode offset errors.
Step 3: measure the excitation voltage with the DVM. Divide the result by the
nominal excitation voltage, either 10V or 5V, to obtain a “compensation
factor” = CF.
Step 4: calculate the correct calibration voltage to apply to the unit.
For ±30mV units the voltage is V = +50mV X CF
For ±100mV units the voltage is V = +100mV X CF
Set the voltage source to the calculated voltage V.
Step 5: trim the unit with the Trim Span (TS) command.
For ±30mV modules the command is $1TS+00050.00
For ±100mV modules the command is $1TS+00100.00
Step 6: verify the trim using the $1RD command. The result should be either
*+00050.00 or *+00100.00
Figure D-3 D1500 Calibration