TB 9-6625-2243-35
IDENTIFICATION AND DESCRIPTION
1. Test Instrument
Identification.
This bulletin provides instructions for the
calibration of Multimeter, Fluke, Models 73, 73 Series III, 75, 75 Series II, 75 Series III, 77,
77 Series II, 77 Series III, 77/AN, and 77/BN. The manufacturer's manuals were used as
the prime data sources in compiling these instructions. The equipment being calibrated
will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are described in text and tables.
b. Time and Technique.
The time required for each calibration is
approximately 2
hours,
2. Forms,
Records, and
Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported 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. Tables containing TI
parameters, performance
specifications, and performance checks which pertain to this calibration are listed in table 1.
Models
Tables
73
3
73 Series III
4
75
5
75 Series II
6
75 Series III
7
77
8
77 Series II
9
77 Series III
10
77/AN
11
77/BN
12
EQUIPMENT REQUIREMENTS
4. Equipment
Required. Table 2
identifies the
specific equipment to be
used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286. Alternate items may be used by the calibrating activity. The
items selected must be verified to perform satisfactorily 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 ratio between the
standard and TI. Where the four-to-one ratio cannot be met, the actual accuracy of the
equipment selected is shown in parenthesis.