TB 9-4931-393-35
SECTION I
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin
provides instructions for the
calibration of Calibrator, AN/USM-317 (SG-836/USM-317) (Hewlett-Packard Model
8402B). The manufacturer's instruction manual was used as the prime data source in
compiling these instructions. The equipment being calibrated will be referred to as the
TI (test instrument) throughout this bulletin.
a. Model variations . TI's with serial numbers prefixed 610 or 613 use transistors
A1Q4 and A1Q5. TI's prefixed 739 or 811A replace A/94 and A1Q5 with A1Q8 (A-B).
b. Time and technique. The time
required for this
calibration is
approximately 4
hours, using the dc (direct current) and low frequency technique.
2. Calibration Data Card, DA Form 2416
a.
Forms, records, and
reports required for
calibration personnel at all
levels are
prescribed by TM 38-750. DA Form 2416 must be annotated in accordance with TM 38-
750 for each calibration performed.
b. Adjustments to be reported on DA Form 2416 are designated (R) at the end of the
sentence in which they appear. When adjustments are in tables, the (R) follows the
designated adjustment. Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Test instrument parameters
Performance specifications
Line voltage regulation 1
Satisfactory performance with any
line voltage between 103.5 and 126.5
V ac
Calibration points
Range
0.01 to 2.0 mW
0.05%
Accuracy
99.5 to 100.5 or 199 to 201Ω
Range
0.06%
Accuracy
1Verified
from 105 to 125 V ac (volts alternating current).
2
CHANGE 1
