Verification Procedure; Dc Voltage Accuracy Check - Keithley 197A User Manual

SECTION 3
Performance Verification
Table 3-1. Equipment Specifications
Mfg
Model
Fluke
343A
Fluke 5200A
Valhalla 2500E
Fluke 5450A
Fluke
5215A
Description Specifications
DC Voltage Calibrator
2oomv, 2v, 2ov, 2oov,
1ooov ranges g.oos%
AC Voltage Calibrator
200mV, zv, 2ov, lOOV, SOHZ
to
1okHz 9.05%
AC-DC Current Calibrator
ZOO@, 2mA, 2OmA, 2OOm&2OOOmA, 1OA ranges
4.03%
DC, g.l% AC to 5kHz (at full scale)
Resistance Calibrator IOOQ, lk!a, 1oks2,1ook!a ra"ges*O.05%; 1m.Q
range
9.01%; 1OMQ range 9.05%;
lOOMa 9.5%
Power Amplifier IOOOV range: lOHz-30Hz 9.12%; 5OkHz-1OOkHz
20.10%; IOOV max @ 1ookHz = IOWz; 750v
max@=13kHz=10vHz
3.5 VERIFICATION PROCEDURE
CAUTION
Do not exceed 1OOOV between the input HI
The following paragraphs give the basic verification pro-
cedure
for the following functions DC volts, AC volts, re-
sistance and current.
and LO terminals or damage to the instru-
ment may occur.
WARNING
The maximum common-mode voltage (volt-
age between input low and chassis ground)
is 500Vpeak. Exceeding this value may cause
a shock hazard. Some of the procedures in
this section may expose the user to danger-
ous voltages. Use standard safety precau-
tions when such dangerous voltages are en-
countered.
4.
5.
3.5.1 DC Voltage Accuracy Check
For each remaining range, apply the required volt-
age as specified in Table 3-2 and verify that the read-
Gg is Githin specifications.
1. Select the DC volt function and autorange. 6. repeat all checks with negative voltage.
2.
3.
Connect the calibrator to the instrument as shown in
Figure 3-l.
Set the calibrator to OV and enable the relative mode.
Leave the relative mode enabled for all DCV meas-
urements. Check to see that the reading is OOO.OOOV
*l count.
Apply a positive2OOmV to the HI and LO INPUT ter-
minals. The reading must be within the limits speci-
fied in Table 3-2.
Figure 3-l. Connections for DCV Verification
3-2