SECTION 4
Performance Verification
4.1 INTRODUCTION 4.3 INITIAL CONDITIONS
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. Per-
fotiance verification may be performed when the instru-
ment is first received to ensure that no damage or misad-
justment has occurred during shipment. Verificatioiimay,
also be performed whenever there is a question of instru-
ment accuracy, or following calibration, if desired.
The Model 199 must be turned on and allowed to warm
up for at least two hours before beginning the verfication
procedures. If the instrument has been subject to extremes
of temperature (outside the range specified in paragraph
4.2), 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 (l8”F) outside the specified temperature range.
NOTE
If the instrument is still under warranty (less than
4.4 RECOMMENDED TEST EQUIPMENT
1 year from the date of shipment), and its perform-
ance falls outside the specified rage, contact your
Table 4-l lists all test equipment required for verification.
Keithley representative or the factory to determine
Alternate equipment may be used as long as the substitute
the correct course of action.
equipment has specifications at least as good as those listed
ifi the table.
4.2 ENVIRONMENTAL CONDITIONS
All measurements should be made at 18 - 28°C (65 - 82°F)
and at less than 80% relative humidity.
NOTE
The verification limits in this section do not include
test equipment tolerance and are based on one
year accuracy specifications.
Table 4-1. Recommended Test Equipment
Mfg 1
Model
Description Specifications
I k I
Fluke
Fluke
Fluke
Fluke
Valhalla
544OA
DC Voltage Calibrator 3OOmV, 3v, 3ov, 3oov ranges +15ppm.
5200A AC Voltage Calibrator 3OOmV, 3V, 30V ranges; 2OH.z &O.l%;
50Hz-20kHz 0.02%; lOOkI+ io.33%.
5215A
AC Power Amplifier 3COV range: 2OHz &X2%; SOHz-20kHz 10.04%;
lOOkHzfo.l%
5450A
Resistance Calibrate? 3ooR-3MQ ranges i-15ppm; 3OMQ L32ppm;
300MR range X?2Sppm
2500E
AC-IX Ciarrent Calibrator 3OmA, 3A ranges M.03% DC, io.l% AC to 5kHz
4-l
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