Technical data

90 34405A User’s and Service Guide
4 Performance Tests and Calibration
Gain Adjustment Considerations
• The zero adjustment procedure must have been recently performed
prior to beginning any gain adjustment procedures.
• Be sure to allow the instrument to warm up and stabilize for 2 hours
before performing the adjustments.
• Consider the thermal effects as you are connecting test leads to the
calibrator and multimeter. It is recommended to wait one minute before
starting the calibration after connecting the test leads.
Valid Gain Adjustment Input Values Gain adjustment can be accomplished
using the following input values.
CAUTION
Never turn off the instrument during a Gain Adjustment. This may cause calibration
memory for the present function to be lost.
Table 14 Valid Gain Adjustment Input Values
Function Range Valid Amplitude Input Values
DC Volts 100 mV, 1 V, 10 V, 100 V, 1000 V 0.9 to 1.1 x Full Scale
DC Current 10 mA, 100 mA, 1000 mA, 10 A 0.9 to 1.1 x Full Scale
Ohms 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, 1MΩ, 10 M
Ω
0.9 to 1.1 x Full Scale
Frequency Autorange/1 kHz Input
≥ 100 mV rms, 900 Hz to 1100 Hz
AC Current 1 mA, 10 mA, 100 mA, 1000 mA, 10 A 0.9 to 1.1 x Full Scale
AC Volts 10 mV, 100 mV, 1 V, 10 V, 100 V, 750 V 0.9 to 1.1 x Full Scale
Capacitance 0.4 nF, 1 nF, 10 nF, 100 nF, 1 µF, 10 µF,
100 µF, 1000 µF, 10000 µF
0.9 to 1.1 x Full Scale