Atec ROD-L M25 Installation and operating instructions
OPERATION AND SERVlCE
MANUAL
ROD-L
M25
25
AMP
GROUND CONTINUITY
TESTER
JULY,
1984
Advanced Test Equipment Corp.
www.atecorp.com 800-404-ATEC (2832)
Operation & Service
Manual
ROD-L M25
25 Amp Ground Tester
TABLE OF CONTENTS
-
SECTION
I
INTRODUCTION
1-1
General
1-6 General Description
1-11
Equipment Supplied
1-15 Identification
1-17 Specification
I1 INSTALLATION AND OPERATION
General 2-1
Unpacking and Inspection 2-1
Installation 2-1
Rack Mounting 2-1
Power Requirements 2-3
Power Cable 2-3
Initial Installation and Turn On 2-3
Storage 2-3
Repackaging for Shipment 2-3
Operating Controls 2-4
Operational Check 2-8
Test Time Adjustment Procedure 2-1 0
Automatic Test Procedures 2-1 0
25AMP Ground Tester with M488 Tester
Set
Up 2-10
ill
THEORY OFOPERATION
3-1 Theory of High Current Ground Testing 3-1
3-2 Ground Continuity 3-1
3-3 Instrument Functional Diagram 3-3
3-6 Instrument Assembly Diagram 3-4
3-7 Power Supply Circuit (A101 3-4
3-9 A22 Control Logic Board 3-4
IV MAINTENANCE AND SERVICE
Introduction
Calibration
Set Up
Meter Mechanical Zero
Ammeter Calibration
Fail Pots Calibration
Test Time Calibration
Resistance Calibration
Troubleshooting
SECTION
TABLES, SPECIFICATION CHAR'TS
AND
DIAGRAMS
Table
1-1
Figure 2-1
Table 2-1
Figure 2-2
Figure 2-3
Figure 3-1
Figure 3-2
Figure 3-3
Table 4-1
Figure 4-1
V
PARTS LIST
Specifications
Rack Mounting Kit Installation
Control And Indicators
Control And Indicators
M25 Hipot Interface
Functional Diagram
Assembly Diagram
Detail Functional Diagram
Calibration Equipment
Test Set-Up
A10 Power Supply
A22 Control Logic
VI
SCHEMATICS
Wiring Diagram
Assembly Drawing, Mother Board
A10 Power Supply
A10 Power Supply Assembly
A22 Control Logic
A22 Control Logic Assembly
W
OPTIONS
PAGE
1-2
2-2
2-5
2-7
2-1
1
3-3
3-4
3-5
4-1
4-3
5-2
5-3
A8 Remote Control
Parts List
Schematics
lNTRODUCrI'lON
SECTION
I
1-1
GENERAL
1-2 This publication, which provides operating and servicinginstructions for
the ROD-L Electronics 25 amp Ground Testers is divided into five sections.
sections I describes the Instrument and list its specifications. Section
II
contains Installation Instructions and Operating Procedures. Section 111
contains Theory of Operation. Section IV contains Service and Calibration
Instructions. Section
V
contains Replacement Parts Information, Parts
Location Diagrams and Schematics.
1-3 25amp Ground Testers are Low Voltage testers with ground continuity
test capability for performance of ground tests in accordance with
applicable B.S.I., V.D.E. and I.E.C. standards.
1-4 The 25 amp ground test is one of many tests required by certification
agencies
as
proof of an instrument's ability to withstand power line
spikes without becoming a hazard to itself or the user. For example,
lighting, drastic load changes or power line outages can place short
duration spikes on power lines of many times nominal line voltage. The
gnd should be able todivert any leakage to the chassis without getting
damaged.
1-5 GENERAL DESCRIPTION
1-6 The ROD-L Model 25amp Ground Testers apply low voltage tothe device
under
test
for a duration of time preset from one second to
90
seconds.
The device under test is plugged into the front panel receptacle (or special
rear panel connector on some models). Test limits for total resistance
are preset by the user via a rear panel control. When the device under
test is defective, automatic circuitry turns off the low voltage and meter,
lights the FAIL lamp and activates an audible alarm. These audible and
visual alarms must be manually reset atfront panel or can be reset by
remote control (see options).
1-7 All Models incorporate a rapid, automatic electronic shutdown circuit to
turn off the low voltage within two milliseconds after a fault.
1-8 For operator use, the test cycle is fully automatic; accidental test
initiation is prevented by use of a recessed start switch. If ground fails
during the test, the Tester automatically activates failure operation, i.e.,
voltage is shut down and there is a visual and audible alarm.
1-9
1-2
. -
Ohm Meter
Ammeter
SPECIFICATIONS (CONTINUED)
0-0.1 5 ohms Accurate to
+5%
F.S.
Up
to 30amps accuracy
to
+5%
F.S.
Input Power lZOVAC, 50160
Hz,
280
W
max
Environmental Operating Condition O"to 50% (32Oto 122*~)
Physical Color Mint greyIOlive grey
Weight 35 ibs Net (13.5 Kg)
Dimensions
SAFETY FEATURES
16 3/4x54x13i inches
(43
x
13x 34 cm)
Sequenced design of operation. Loss of ground terminates
test
cycle.
Recessed
START
button. Visual and audible alarm
at
failure. Voltage
lockout requiring manual reset.
INSTALLATJON AND OPERATJON
SECTION
I1
2-1 GENERAL
2-2 This section contains
the
recommended procedure for unpacking and
inspection, installation, operation, storage and reshipment.
2-3 UNPACKING AND INSPECTION
2-4
Any shipping carton that appears damaged should be unpacked with
carrier's agent present. Inspect the instrument for damage (scratches,
dents, broken knobs or meters, etc). If the instrument is damaged
or
fails to meet specifications (see Performance Test, Section IV), notify
ROD-L Electronics immediately, retain the shipping carton and the
padding material for the carrier's inspection.
2-5 LNSTALLATION
2-6 The ROD-L Model 25amp Ground Testers
are
suitable for either bench
or rack mounting. To rack mount the instrument, use Rack Mounting
Kit, part #M100-5001.
Rack Mounting Kits may be ordered from factory.
2-7
RACK
MOUNTING
2-8 The procedure for installing Rack Mounting Kit, M100-5001 on the
Tester
is
as
follows:
a.
Place the instrument on edge of bench
as
shown in Figure
2-1
b.
Remove Trim Strip (#2) from both sides of instrument
c.
Place L-Bracket
(#3)
and secure to chassis with two machine
screws
(#4)
furnished with Mounting Kit.
d.
Rotate Instrument on work bench and repeat steps "b" and
nC~~
.
Check that screws and brackets are firmly secure
Figure
2-1
-
Rack
Mounting Kit Installation
-
2-9 POWER REQUIREMENTS
2-10 The Model 25amp Ground Tester requires a power source of 120 or 240
volts AC, single phase, 50 to 60
Hz.
Insure that the power socket to
which the instrument connects has a functioning safety ground.
2-11 POWER CABLE
2-12 To protect operating personnel, the National Electrical Nanufacturers
Association (NEMA) recommends that the instrument panel and cabinet
be grounded. This instrument is equipped with a three-conductor Dower
cable which when plugged into an appropriate.rcceptacle grounds the
instrument. The offset pin on the three-prong connector is the ground
pin.
2-13
INITIAL INSTALLATION AND TURNqN
2-14 CAUTION
Prior to applying power to the instrument perform the following:
a. Turn-Off Power Switch on ROD-L Tester,
set
the rear panel
AC Line 115/230V voltage switch to indicate the number that
corresponds to the line voltage range being used. The number
visible on the slide switch indicates the line voltage range for
which the primary circuit is connected.
Set the OHMS TRIP control tofull clockwise position.
With and AC voltmeter, check the primary power line for normal
line voltage conditions.
Set VOLTAGE ADJ switch on rear panel to appropriate position
ke.
if input low line conditions exist, set to normal,8% low line,
or 16%low line asappropriate).
e.
With power switch off, check tobe sure that the proper fuses are
installed in accordance with markings on rear panel and in accor-
ance with 115/230V line switch.
f.
Connect the six foot power cord between instrument and power
source. Operational Check procedure per paragraph 2-23.
2-15 STORAGE
2-16 It is strongly recommended that the equipment be packed asif for
a.
b.
2
3
4
5.
6
7
(S4)
2-5
9
i2
I
0
1 2
BP-2
0
0
r
I
')
5 6
71
l
�
8
2-7
a.
2-8
b.
c.
2-10
Gnd
0 0
Oo
0
1.
3.
4.
3-1
3-2
Other manuals for ROD-L M25
1
Table of contents
Other Atec Test Equipment manuals
