Keithley 2701, Service Manual

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Model 2701 Service Manual Performance Verification 1-13
Verifying AC current
Check AC current accuracy by applying accurate AC voltage current at specific frequencies
from the AC current calibrator to the Model 2701 input, verifying that the displayed readings
fall within specified limits. Follow these steps to verify AC current.
1. Connect the Model 2701 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 2701 AC current verification
2. Select the AC current function by pressing the
ACI
key.
3. Set the Model 2701 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
2.9817 to 3.0183A
* 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.
!
Model 2701 Ethernet 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 ETHERNET
AMPS
Calibrator (Output AC Current)
Model 2701
INPUT LO
OUTPUT
HI
OUTPUT LO
CAT I