Verifying Ac Current - Keithley SourceMeter 2790 Reference Manual

Model 2790 SourceMeter

Verifying AC current

Check AC current accuracy by applying accurate AC voltage current at specific frequencies
from the AC current calibrator to the Model 2790 input and verifying that the displayed
readings fall within specified limits. Follow these steps to verify AC current:
1.
Figure 16-4
Connections for Model 2790 AC current 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
2.
3.
4.
®
Switch System Reference Manual
Connect the Model 2790 AMPS and INPUT LO jacks to the calibrator as shown in
Figure 16-4. Be sure the INPUTS switch is in the FRONT position.
INPUT LO
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
AMPS
Select the AC current function by pressing the ACI key.
Set the Model 2790 for the 1A range.
Source 1A and 3A, 1kHz full-scale AC currents as summarized in
verify that the readings are within stated limits.
Table 16-5
ACI limits
Applied
ACI range AC current
1A 1.000000A
3A 3.00000A*
*If the Fluke 5725A amplifier is not available, apply 2.2A from the
calibrator. Reading limits for 2.2A are 2.1949 to 2.2051A.
OUTPUT
HI
OUTPUT LO Calibrator (Output AC Current)
Reading limits @ 1kHz
(1 year, 18°C to 28°C)
0.99860 to 1.00140A
2.9937 to 3.0063A
16-13
Table 16-5 and