Verifying Ac Current; Aci Limits - Keithley 2015 Service Manual

Verifying AC current

Check AC current accuracy by applying accurate AC voltage current at specific frequencies
from the AC current calibrator to the Model 2015 input and verifying that the displayed readings
fall within specified limits. Follow these steps to verify AC current:
1.
Figure 1-4
Connections for AC current verification
Model 2015
REM STEP SCAN CH1 CH2 CH3 CH4 CH5 CH6 CH7
TALK
LSTN
SRQ
SHIFT
TIMER
HOLD TRIG FAST MED SLOW REL FILT AUTO ERR
MATH T H D dBm dB CONT
Ω2 Ω4
DCV ACV ACI
SHIFT DCI
DELAY HOLD LIMITS ON/OFF TEST CAL
LOCAL
TRIG
EX TRIG STORE RECALL FILTER REL
POWER
SAVE SETUP RS232
CONFIG HALT GPIB
SOURCE MEAS
STEP SCAN DIGITS RATE
THD
2.
3.
4.
Table 1-5

ACI limits

ACV
range
1A
3A
Connect the Model 2015 AMPS and INPUT LO jacks to the calibrator as shown in
Figure 1-4.
SENSE
INPUT
Ω 4 WIRE
HI
CH8 CH9 CH10 MATH
REAR
4W
350V 1000V
BUFFER STAT !
PEAK PEAK
2015 THD MULTIMETER
LO
500V
PERIOD TCOUPL
PEAK
INPUTS
FREQ TEMP
RANGE F R
AUTO
FRONT/REAR
3A 250V
AMPS
RANGE
EXIT ENTER
Amps
Select the AC current function by pressing the ACI key, then choose the SLOW integra-
tion rate with the RATE key.
Set the Model 2015 for the 1A range.
Source 1A and 2.2A, 1kHz full-scale AC currents as summarized in Table 1-5, and
verify that the readings are within stated limits.
Applied AC voltage
1.000000A
2.20000A
Output HI
Input
LO
Output
LO
Reading limits @ 1kHz (1 year, 18°C-28°C)
0.99860 to 1.00140A
2.1949 to 2.2051A
Performance Verification
AC Current Calibrator
1-13