TB 9-6625-396-50
SECTION I
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Inductance Bridge, General Radio Models 1632-A and 1632-AR. 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 Variation. The model 1632-A is portable and the 1632-AR is rack mounted.
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 From 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.
Table 1. Calibration and Description
Test instrument parameters
Performance specifications
Range: 0.0001 H to 1111H
"a" Range, 1%;
Accuracy:
all others, 0.1%
Range: 0.001 mho to 1111 mho
1%
Accuracy:
SECTION II
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2
identifies the
specific meet or
exceed the minimum
use
specifications listed in equipment used in this calibration procedure. This table 2. The
accuracies listed in table 2 provide a four-to equipment is issued with Secondary Reference
Standards Calibration Set NSN 4931-00-621-7878 and is to be used in performing this
procedure. Alternate items may be used by the calibrating activity when the equipment
listed in table 2 is not available. The items selected must be verified to perform satisfactory
prior to use and must bear evidence of current calibration. The equipment must meet or
exceed the minimum use specifications listed in table 2. The accuracies listed in table 2
provide a four-to-one ration between the standard and TI.
2