AT&T Bell System 145A Description And Use

BELL SYSTEM PRACTICES
AT & TCo Standard
SECTION 634-200-225
Issue 1, March 1979
145A TEST SET
DESCRIPTION AND USE
•
CONTENTS
1. GENERAL
2. DESCRIPTION
3. CALIBRATION
4. USE
PAGE
4
6
5. MAINTENANCE
1. GENERAL
CONTENTS PAGE
19
1.01
This section covers the description and use
of the 145A test set (Fig. 1).
Fig. 1-145A Test Set
1.02
The 145A test set is a portable, battery
powered test set used for testing operations
associated with construction, installation, and repair.
These testing operations include resistance
measurement, detection of ringer on the line,
measurement of de voltage, pair conductor length
measurement, direct reading open fault location,
tone source generator, ac voltage measurements,
line current measurements, circuit loss measurement
at 1000 Hz, and circuit noise measurement.
2. DESCRIPTION
2.01
The 145A test set is battery powered and
weighs approximately 3
pounds. It measures
approximately 5 inches by 8 inches by 6 inches,
and a strap is provided for carry111g or hanging
the test set during use.
NOTICE
Not for use or disclosure outside the
Bell S:,stem except under \\Titten agreement
Printed in U.S.A.
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