Agilent Technologies 3000 Series User's And Service Manual page 108

Service
DC Gain Accuracy Test
27 Calculate the DC Gain using the following expression and record this
value in the DC Gain Test section of the Performance Test Record:
∆V
-------------- =
DCGain =
∆V
4-12
V – V
out scope+ scope-
---------------------------------------- -
V – V
in DMM+ DMM-