Verifying Dc Current; Figure 1-3 Connections For Model 2701 Dc Current Verification; Table 1-4 Dci Limits - Keithley 2701 Service Manual

1-12 Performance Verification

Verifying DC current

Check DC current accuracy by applying accurate DC currents from the DC current calibra-
tor to the AMPS input of the Model 2701 and verifying that the displayed readings fall within
specified limits.
Follow these steps to verify DC current accuracy:
1.
Figure 1-3
Connections for Model 2701 DC current verification
Model 2701
Model 2701 Ethernet Multimeter / Data Acquisition System
MATH O U T P U T RATIO CH AVG CONT OCOMP PERIOD SENSOR
Ω2 Ω4
SHIFT DCV ACV DCI ACI
DELAY HOLD LIMITS ON/OFF TYPE MONITOR
LOCAL
EX TRIG TRIG STORE FILTER REL
RECALL
POWER
SAVE SETUP CONFIG HALT TEST LSYNC ETHERNET
OPEN CLOSE
STEP SCAN DIGITS RATE
2.
3.
4.
Table 1-4
DCI limits
DCI range
20mA
100mA
1A
3A
* Source positive and negative currents with values shown.
** If the Fluke 5725 amplifier is not available, apply 2.2A from calibrator. Reading limits for 2.2A
input are: 2.197240 to 2.202760A.
Connect the Model 2701 AMPS and INPUT LO jacks to the calibrator as shown in
Figure 1-3. Be sure the INPUTS switch is in the FRONT position.
INPUT LO
Integra Series
SENSE
INPUT
Ω 4 WIRE
HI
350V 1000V
!
PEAK PEAK
LO
500V
PEAK
INPUTS
FREQ TEMP
RANGE
F R
CH-OFF CARD
AUTO
FRONT/REAR
3A 250V
AMPS
RANGE CAT I
RS-232
EXIT ENTER
AMPS
Select the DC current measurement function by pressing the DCI key.
Set the Model 2701 for the 20mA range.
Source positive and negative full-scale currents for each of the ranges listed in
Table 1-4 and verify that the readings for each range are within stated limits.
Applied DC current*
20.0000mA
100.0000mA
1.000000A
3.000000A**
Calibrator (Output DC Current)
OUTPUT
HI
Note: Be sure calibrator is set for
OUTPUT
LO
Reading limits (1 year, 18°C to 28°C)
19.98840 to 20.011160mA
99.8700 to 100.1300mA
0.999120 to 1.000880A
2.99628 to 3.00372A
Model 2701 Service Manual
normal current output.