Table 2. minimum Specifications of Equipment Required
Minimum use
Manufacturer, model,
Item
Common name
specifications
and part number
A1
DECADE RESISTOR
Range: 27 to 330K ohms
Model ZM-16/U
Accuracy: 2.5%
A2
ELECTRONIC
Range: 2.5 to 518 vdc
Model AN/USM-98
Accuracy: 75%
A3
METER
Range: 2.5 to 600 vdc;
John Fluke, Model 760A*
CALIBRATOR
27 to 330K ohms
Accuracy: 1%
A4
POWER SUPPLY
Range: 2.5 to 30 vdc
Model PP3514/U
A5
POWER SUPPLY
Range: 300 to 600 vdc
Model PP-3135/U
*Issued with AN/GSM-256.
Table 3. Accessories Required
Item
Common name
Description and part number
B1
CABLE
30-in., RG-58/U; double banana plug termination
SECTION III
PRELIMINARY OPERATIONS
a.
6. Preliminary Instructions.
The instructions
WARNING
outlined in this section are preparatory to the calibration
HIGH VOLTAGE is used during the performance
process. Personnel should become familiar with the entire
of this calibration. DEATH ON CONTACT may
bulletin before beginning the calibration.
result if personnel fail to observe safety
b. Items of equipment used in this procedure are
precautions.
referenced within the text by common name and item
identification number as listed in tables 2 and 3. For the
7. Equipment Setup. a. Remove lid from TI.
identification of equipment referenced by item numbers
prefixed with A, see table 2, and for prefix B, see table 3.
b. Turn TI 45 V BATT switch to OFF.
c. Place TI in horizontal position. If meter does not
indicate zero, adjust zero adjustment screw located on
front of TI meter for a zero indication.
SECTION IV
CALIBRATION PROCESS
calibration.
NOTE
(1) Connect equipment as shown in figure 1.
Unless otherwise specified, verify the results of
(2) Set TI VM-RES switch to VM position.
each test and take corrective action whenever the
(3) With the TI in the 3V range position, adjust power
test requirement is not met before continuing with
supply (A4) for a 3-volt indication on TI. Electronic
the calibration.
voltmeter (A2) will indicate between 2.91 and 3.09 volts dc.
(4) Perform procedures in (3) above for TI range
8. Voltmeter Accuracy. a. Performance Check.
positions and meter indications listed in table 4. Electronic
voltmeter will indicate within limits specified.
NOTE
Perform (1) through (4) below for maintenance
3
