Table of Contents
Advertisement
16-18
Model 7702 verification
Use these procedures to verify measurement accuracy through the Model 7702
40-Channel Multiplexer Card.
Verifying DC voltage
Check DC voltage accuracy by applying accurate voltages from the DC voltage calibrator
to the Model 7702 input terminals and verifying that the displayed readings fall within
specified limits.
`^rqflk
Follow these steps to verify DC voltage accuracy:
1.
klqb
Figure 16-8
Connections for Model 7702 DC volts verification
CH1
TE122
TE121
Model 7702
2.
Do not exceed 300V DC between Model 7702 INPUT H and L termi-
nals or between any adjacent channels.
Connect the Model 7702 CH1 H and L INPUT terminals to the DC voltage calibra-
tor as shown in
Figure
16-8.
Use shielded, low-thermal connections when testing the 100mV and 1V ranges
to avoid errors caused by noise or thermal effects. Connect the shield to the
calibrator's output LO terminal.
OUTPUT
OUTPUT
Install the Model 7702 in Slot 1 of the Model 2790, then turn on the power and
allow the unit to warm up for two hours before proceeding. Be sure the front panel
INPUTS switch is set to the REAR position.
Model 2790 SourceMeter
Calibrator (Output DC Voltage)
HI
NOTE Use shielded, low-thermal cables
LO
®
Switch System Reference Manual
for 100mV and 1V ranges.
Advertisement
Table of Contents
