HD Electric 8280, 8281, 9390, 9391 Instruction Manual

®

HALO

A M M E T E R

Instruction
& Operation
Manual

MODEL NUMBERS:
8280, 8281, 9390 & 9391

®

HD ELECTRIC COMPANY

1 4 75 LA K ES I DE DR I VE • WA U KE GA N, I LLI NO IS 6 0 08 5 U .S. A.

PHONE [phone] • FAX [phone] • website: www.HDElectricCompany.com

HALO Ammeter

INSTRUCTION & OPERATING MANUAL

Table of Contents

GENERAL DESCRIPTION .................................................2

SAFETY...............................................................2

DESCRIPTION OF EQUIPMENT ............................................2

USING THE EQUIPMENT .................................................3

HALO - BATTERY REPLACEMENT ..........................................4

HALO FORKHEAD INSTRUCTIONS..........................................5

LIMITATION OF WARRANTY AND LIABILITY ..................................7

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Note - Prior to use, this manual should be fully read and understood.

General

HALO is a high-current, digital ammeter designed to be used on system voltages up to 69,000 volts
AC. The HALO ammeter will sense and display current to 1,999 amps, and will hold the maximum
reading and/or track the reading for the user.

HALO was designed for the purpose of measuring current flow on overhead lines and/or under­ground systems. When using the HALO, a hotstick must be used at all times and rigorous hotstick
work precautions must be followed. When used correctly, HALO can enable fast, accurate and safe
load surveys and load balance investigations.

The instrument is constructed of durable plastic and fiberglass tubing and will require
a minimum of maintenance. However, regular examinations are needed to ensure that
no deep scratches or physical damage has occurred. If damage does occur, remove
from service and arrange for repair.

The HALO has 4 models, HALO I HOOKHEAD and FORKHEAD has one mode (Hold).
HALO II HOOKHEAD and FORKHEAD has two modes of operation (Track and Hold).

The opening in the head is large enough to accept all sizes of wire conductors.

Safety

As HALO is often used on and in the vicinity of high voltage equipment, please practice the following
safety precautions.

1. Before use, make certain that:
A. Operating instructions are read, understood, and questions answered.
B. Rigorous hotstick work precautions are followed.
C. Industry and/or company standard safety practices are followed.
D. All parts of the equipment are dry, clean, properly secured together and in working order.
E. The equipment set-up is correct for the voltage system to be monitored.

2. During the use of the unit, make certain that:
A. Correct hotsticks are installed for the system voltage being tested.
B. Hands are kept only on the insulated handle section of the hotstick and not on the HALO!
C. Electrically safe, insulated rubber gloves are used at all times on the hotstick.
D. The HALO is not an insulator. Do not bridge the HALO from energized line to ground

or from line to line.

Description of Equipment

See Page 6 for a brief overview of the HALO’s features and operating procedures.

The HALO instrument has a molded sensing coil in the head and a 31⁄2 digit LCD display
in the fiberglass tube. The HALO measures current between 0 and 1,999 amperes. The HALO
is autoranging providing a reading between 0 to 199.9 on the low range and 200 to 1999
on the high range. When in the HOLD mode, the display will lock in at the highest current
monitored on the conductor. If an over-range condition exists (above 1,999 amps), the
display will show a 1. Reset display prior to using again.

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