TB 9-6625-2127-35
activity when the equipment listed in table 2 is not
the equipment selected is shown in parenthesis.
available. The items selected must be verified to
perform satisfactorily prior to use and must bear
5.
Accessories Required. The accessories listed
evidence of current calibration. The equipment must
in table 3 are issued as indicated in paragraph 4 above
meet or exceed the minimum use specifications listed in
and are used in this calibration procedure. When
necessary, these items may be substituted by equivalent
to-one ratio between the standard and TI. Where the
items, unless specifically prohibited.
four-to-one ratio cannot be met, the actual accuracy of
Table 2. Minimum Specifications of Equipment Required.
Item
Common name
Minimum use
Manufacturer and model
specifications
(part number)
A1
FREQUENCY COUNTER
Range: 100 Hz to 2 kHz
Hewlett-Packard, Model
Accuracy: 0.5%
5245A (MIS-28754/1
Type 1) w/5255A and
K87-59992A
A2
Range: 0 to 900 ohms
Biddle-Gray, Model
STANDARD1
Accuracy: 0.25%
601147-1 (7910328)
A3
TEST OSCILLATOR
Range: 20 Hz to 3 MHz
Hewlett-Packard, Model 652A
(MIS-10224)
A4
TRUE RMS VOLTMETER
Range: 30 Hz to 3 MHz
John Fluke, Model 8922A/AA
-50 to +10 dBm
(8922A/AA)
Accuracy: 0.05 dB
Range: 2 mV
0.25 dB, 50 Hz to 10
kHz; 0.35 dB, 20 to
50 Hz; 0.4 dB, 10
kHz to 2 MHz; 0.5
db, 2 to 3 MHz
Range: 20 mV
0.15 dB, 50 Hz to 200
kHz; 0.25 dB, 20 to
50 Hz and 200 kHz
to 1 MHz; 0.4 dB, 1
to 2 MHz; 0.5 dB, 2
to 3 MHz
Range: 200 mV, 2V, 20 V
0.1 dB, 50 Hz to 200
kHz; 0.15 dB, 20 to
50 Hz and 200 kHz to
1 MHz; 0.35 dB, 1 to
2 MHz; 0.5 dB, 2 to
3 MHz
1Two required.
3
