Keithley 486 Instruction Manual page 138

SECTION 5
Performance Verification
5.1 INTRODUCTION
The procedure outlined in this section may be used to
verify that the instmment is operating within the limits
stated in the specifications at the front of this manual.
Performance verification may be performed when the in-
stnunent is first received to ensure that no damage or
misadjustment has occurred during shipment. Verifica-
tion may also be performed whenever there is question of
instrument accuracy, or following csJibration, if desired.
NOTE
If the instrument is still under warranty (less
than 1 war from the date of shimnent). and its
perfo&ce falls outside the r.pecifiei range,
contact your Keithley representative or the
factory to determine the correct course of ac-
tion.
5.2 ENVIRONMENTAL CONDITIONS
All measurements should be made at 18-28°C (65-82"F)
and at less than 70% humidity.
Manufacturer
Keithley
Model Description Specifications
263 Calibrator/Source (5-l/2 digits)
2nA, 20nA ranges; +.(0.065% + 10 collnts)
2001-A range; tiO.O35% + 10 counts)
Keithley 6171
Keithley
Keithley
Pomona
7024-3 2&t
&iax cabk
-
197
DMh4 (dc Volts) (5-l /2 digits)
Banana Plug Cable (2 required)
2OOv, 1oOw ranges; tiO.O15% + 2 counts)
B-24
-
5.3 INITIAL CONDITIONS
The Model 486/487 must be turned on and allowed to
warmupforatkasttwo hours before beginningtheveri-
fication procedures. If the instrument has been subject to
extremes of temperature (outside the range specified in
paragraph 5.2), additional time should be allowed for in-
ternal temperatures to reach normal operating tempera-
ture. Typically, it takes one additional hour to stabilize a
unit that is 10°C (18OF) outside the specified temperature
rsnge.
5.4 REQUIRED TEST EQUIPMENT
Table 5-l lists all the test equipment required for verifica-
tion. The procedure for performance verification is based
on using this exact equipment.
NOTE
Theverificationlimitsinthissectiondonotin-
dude test equipment tolerance and are based
on the one year accuracy specifications of the
Model 486/487.
Alternate equipment may be used as long as the substi-
tute equipment has specifications at least as good as
those listed in Table 5-1.
Table 5-l. Verification Equipment
3-slat male to 2-lug female triax
adapter
2M-2mA ranges; +(0.025% + 10 counts)
-
5-l