SECTION 5
PERFORMANCE VERIFICATION
5.1 INTRODUCTION
The procedures outlined in this section may be used to verify
that the instrument is operating within the limits stated in the
specifications at the front of this manual. Performance verifi-
cation may be performed when the instrument is first received
to ensure that no damage or misadjustment has occurred dur-
ing shipment. Verification may also be performed whenever
there is a question of instrument accuracy, or following
calibration. if desired.
NOTE
If the instrument is still under warranty (less
than 1 year from the date of shipment), and its
performance falls outside the specified range,
contact your Keithley representative or the fac-
tory to determine the correct course of action.
5.2 ENVIRONMENTAL CONDITIONS
All measurements should be made at X3-28°C (6542°F)
and at less than 70% relative humidity unless otherwise
noted.
5.3 INITIAL CONDITIONS
The Model 617 must be turned on and allowed to warm up
for at least two hours before beginning the verification pro-
cedures. If the instrument has been subject to extremes of
temperature (outside the range specified in paragraph 5.2).
additional time should be allowed for internal temperatures
to reach normal operating temperature. Typically, it takes
one additional hour to stabilize a unit that is 10°C (x~~F) out-
side the specified temperature range.
NOTE
While rated accuracy is achieved after the two hour
warm up period, input bias cwent may require ad-
ditional time to come to its optimum level. Allow
two hours for input bias current to settle to less
than 1OfA and eight hours to less than 5fA. It is
preferable in sensitive applications to leave the unit
on continuously.
5.4 RECOMMENDED TEST EQUIPMENT
Table 5-l lists all test equipment required for verificaticn
Alternate equipment may be used as long as the substitute
equipment has specifications at least as good as those listed in
the table.
NOTE
The verification limits in this section do not in.
elude test equipment tolerance.
A shielded test fixture will be necessary for some of the amps,
ohms and coulombs verification procedures. Construction of
Table 5-l. Recommended Test Equipment for Performance Verification
Teraohmmeter
Decade Resistor
Standard Capacito!
Specifications
3.19v, 1.9v. 19v, 19ov. 0.002%
3.015% DC Accuracy
100MfL +0.035%
1GQ. 10.05%
10GR. iO.O7%
IOOGG, +0.08%
lOOMa, +I%
1GR. +2%
lOGIl, +2%
lOOGO, +2%
lOR-lOMQ, f .03%
1OOOpF. +O.l%
See Figure 51
Manufacturer and Model
Fluke; 343A
Keithley; 197
Guildline; 9520
Keithley; R-289-IOOM
Keithley; R-289-IG
Keithley; R-319-IOG
Keithley; R-319-IOOG
ESI; DB-62
Hewlett-Packard; 16384A
51
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