Model 2790 Verification; Verifying Dc Voltage - Keithley SourceMeter 2790 Reference Manual

16-8

Model 2790 verification

Perform these tests to verify accuracy using the Model 2790 front panel terminals.

Verifying DC voltage

Check DC voltage accuracy by applying accurate voltages from the DC voltage calibrator
to the Model 2790 INPUT jacks and verifying that the displayed readings fall within spec-
ified limits.
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Follow these steps to verify DC voltage accuracy:
1.
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Figure 16-1
Connections for Model 2790 DC volts verification
Model 2790
Model 2790 SourceMeter Switch System
MATH O U T P U T RATIO CH AVG CONT OCOMP PERIOD SENSOR
Ω2 Ω4
SHIFT DCV ACV DCI ACI FREQ
DELAY HOLD LIMITS ON/OFF TYPE MONITOR CH-OFF
LOCAL
EX TRIG TRIG STORE RECALL FILTER REL
POWER
SAVE SETUP CONFIG HALT TEST LSYNC GPIB
OPEN CLOSE STEP SCAN DIGITS RATE EXIT
Do not exceed 1000V peak between front terminals INPUT HI and
INPUT LO, because instrument damage may occur.
Connect the Model 2790 HI and LO INPUT jacks to the DC voltage calibrator as
shown in Figure 16-1. Make sure the INPUTS switch is set to the FRONT position.
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 cal-
ibrator's output LO terminal.
INPUT HI
OUTPUT HI
SENSE
INPUT
Ω 4 WIRE
HI
350V 1000V
!
PEAK PEAK
LO
500V
PEAK
INPUTS
TEMP
RANGE F R
F
F
CARD
AUTO
FRONT/REAR
3A 250V
AMPS
RANGE
RS-232
ENTER
INPUT LO
Model 2790 SourceMeter
Calibrator (Output DC Voltage)
NOTE Use shielded, low-thermal cables
OUTPUT LO
®
Switch System Reference Manual
for 100mV and 1V ranges.