Keithley 2700, Service Manual

Page: 28 / 174

1-12 Performance Verification
Verifying AC current
Check AC current accuracy by applying accurate AC voltage current at specific frequencies
from the AC current calibrator to the Model 2700 input, and verifying that the displayed read-
ings fall within specified limits. Follow these steps to verify AC current:
1. Connect the Model 2700 AMPS and INPUT LO jacks to the calibrator as shown in
Figure 1-4 . Be sure the INPUTS switch is in the FRONT position.
Figure 1-4
Connections for Model 2700 AC current verification
2. Select the AC current function by pressing the ACI key.
3. Set the Model 2700 for the 1A range.
4. Source 1A and 3A, 1kHz full-scale AC currents as summarized in Table 1-5 , and verify
that the readings are within stated limits.
Table 1-5
ACI limits
ACV range Applied AC voltage Reading limits @ 1kHz (1 year, 18°C to 28°C)
1A
3A 1.000000A
3.00000A* 0.99860 to 1.00140A
2.9937 to 3.0063A
* 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
Input
LO
Calibrator (Output AC Current)
Amps
Model 2700
Model 2700 Multimeter / Data Acquisition System
RANGE
!
F
500V
PEAK
FRONT/REAR
3A 250V
AMPS
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1000V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
R
EXIT ENTER DIGITS RATE
REL FILTER TRIG EX TRIG STORE RECALL
OPEN
DCV
DCI
MATH O U T P U T RATIO
ACV ACI
Ω
2
Ω
4
FREQ TEMP
CH AVG CONT PERIOD SENSOR
LIMITS ON/OFF DELAY HOLD
SAVE SETUP CONFIG HALT
TYPE
LSYNC TEST
MONITOR
STEP SCAN
OCOMP
CH-OFF CARD
CLOSE
Integra Series
RS-232 GPIB