TB 9-6625-2153-35
NOTE
Calibration Test Report
The purpose of a calibration test report is to allow utilization
of:
a. Instruments whose values have drifted outside
manufacturer's specifications when referenced to nominal
values, yet the drift rate is sufficiently low to allow use within
manufacturer's specified accuracy of the previous test report
value.
b. The performance specifications shall be ascertained by
referencing present measured values to previous measured
values in lieu of nominal values. If present measured values
are not within manufacturer's accuracy specification of last
measured value, the TI must be red-tagged.
Calibration
activities will maintain a case history file of test reports for the
TI. The file will contain an accumulation of at least six of the
most recent test reports. If, in four successive calibrations, the
measured value drifts from nominal value as much as three
times the manufacturer's accuracy specification, the
instrument must be red-tagged,
An example of calibration
data to be annotated on the test report is shown on the sample
test report.
Table 14. Winslow, Models 334W and 334X
Test instrument
Performance specifications
Model 334W
Range: 0.1 Ω to 11,110 Ω
Model 334X
Range: 1 Ω to 111,110 Ω
Accuracy:
0.1% + 0.005 Ω
Decade
Decade switch
Resistance indications
switch
positions
Min
Max
Ohms
0.1Ω/step1
1
00.09490
00.10510
2
00.19480
00.20520
3
00.29470
00.30530
4
00.39460
00.40540
5
00.49450
00.50550
6
00.59440
00.60560
7
00.69430
00.70570
8
00.79420
00.80580
9
00.89410
00.90590
10
00.99400
01.00600
1
00.99400
01.00600
1.0Ω/step
2
01.99300
02.00700
3
02.99200
03.00800
4
03.99100
04.00900
5
04.99000
05.01000
See footnote at end of table.
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