Vanguard DMOM-100 User Manual

OPERATING PROCEDURES!

for the

MODEL DMOM™-100

10-100 Amperes True DC

Digital Micro-Ohm Meter

Part Number VIC-9000-100

Vanguard Instrument Company

1710 Grevillea Court
Ontario, California 91761

TEL: [phone] JULY 2001
FAX: [phone] REV. 0

SAFETY SUMMARY

Operating Procedures DMOM-100™

The following safety precautions must be
observed during all phases of test set-up, test
hookups, testing, and test-lead disconnects.

Do Not Service or Test Alone
Do not perform test procedures or service
unless another person is also present who is
capable of rendering aid and resuscitation.

Avoid Contact with High Voltage

Because electrical utility station
environments contain high voltages and
currents, there is always the possibility of
personal contact with an unexpected lethal
voltage generated by magnetic induction
and/or electrostatic leakage from nearby live
circuitry. When test units are connected to
deenergized (“dead”) power lines, regardless
of how short they are, always discharge the
lines before attaching any test lead. Because
of the possibly deadly consequences of
physical contact with such high-voltage lines,
engineers and technicians must always treat
electrical equipment and hookups as though a
lethal condition will eventually occur.
Therefore, no matter how unlikely it may
seem, never assume anything about the safety
of any test setup.

Ensure the safety of personnel by checking
first-hand to eliminate all possible hazards!

Do Not Test Inductive Winding Resistance

Because the DMOM-100 produces test
currents up to 100 amperes, it is able to build
up large magnetic fields in iron-core
transformers. The interruption of such test
currents can produce a high voltage spike
that can cause severe injury, death, and/or
equipment damage. Therefore, do not
attempt to measure the resistance of iron-core
transformer windings (use equipment
designed specifically for that purpose).

Do Not Modify Test Equipment

Because of the added risk of introducing
additional or unknown hazards, do not install
substitute parts or perform any unauthorized
modification to the DMOM-100. To
ensure that designed safety features are
maintained, it is recommended that all
DMOM-100 repairs be done at Vanguard
Instruments Company or by an authorized
repair-service. Unauthorized DMOM-100
modifications can create unknown safety
hazards and will void the warranty.

Follow Exact Operating Procedures

Any deviation from the operating procedures
described in this manual may create one or
more safety hazards, damage the DMOM­100 or cause test errors; Vanguard
Instruments Co. assumes no liability for
unsafe or improper use of the DMOM-100.

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Operating Procedures DMOM-100™

TABLE OF CONTENTS

Safety Summary

1.0 INTRODUCTION .................................................................................................................. 1

1.1 Applicability ....................................................................................................................... 1

1.2 Supersedure Notice ............................................................................................................. 1

1.3 General Description ............................................................................................................ 1

1.4 Functional Description........................................................................................................ 1

1.5 Furnished Test Accessories ................................................................................................ 1

2.0 DMOM-100 Specifications ................................................................................................. 2

3.0 CONTROLS AND INDICATORS......................................................................................... 3

4.0 PRETEST SETUP .................................................................................................................. 5

4.1 Operating Voltages ............................................................................................................. 5

4.2 DMOM-100 Printer Paper............................................................................................... 6

4.3 DMOM-100 Cable Connections ..................................................................................... 6

5.0 OPERATING PROCEDURES............................................................................................... 7

5.1 Operating Overview............................................................................................................ 7

5.2 Preparation .......................................................................................................................... 7

5.3 Keying-in Data Characters.................................................................................................. 7

5.4 Run Test Procedure...........................................................................................................10

5.5 Enter ID Procedure ...........................................................................................................13

5.6 Review Record Procedure ................................................................................................ 15

5.7 Restore Record Procedure ................................................................................................ 17

5.8 Print Test Record Directory Procedure............................................................................. 19

5.9 Test Record Procedure...................................................................................................... 20

5.10 Computer Interface Procedure ...................................................................................... 21

5.11 Set Clock Procedures .................................................................................................... 21

5.12 Calibration Check ......................................................................................................... 22

Appendix A DMOM-100 Troubleshooting Guide
Appendix B DMOM-100Cable Accessories

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Operating Procedures DMOM-100™

LIST OF TABLES

Table 1.0 DMOM-100 Specifications and Leading Particulars.................................................. 2

Table 2.0 DMOM-100 Controls and Indicators .......................................................................... 4

Table 3.0 Voltage Selection............................................................................................................ 5

Table 4.0 Run Test Procedure (Measure an Unknown Resistance).............................................. 10

Table 5.0 Run Setup Procedure (test-record, site, and equipment identification)........................ 13

Table 6.0 Review Record Procedure ............................................................................................ 15

Table 7.0 Restore Record Procedures........................................................................................... 17

Table 8.0 Print Test Record Directory.......................................................................................... 19

Table 9.0 Erase Test Record Procedure........................................................................................ 20

Table 10.0 Computer Interface Procedures ................................................................................ 21

Table 11.0 Set Clock Procedures................................................................................................ 21

Table 12.0 Calibration Check Procedure.................................................................................... 22

LIST OF FIGURES

Figure 1.0 DMOM-100 Control Panel (Controls and Indicators) ............................................ 3

Figure 2.0 90 to 130Vac Jumper Setting...................................................................................... 5

Figure 3.0 210 to 240Vac Jumper Setting.................................................................................... 5

Figure 4.0 DMOM-100 Cable Connection............................................................................... 6

Figure 5.0 Step-by-Step Procedures for DMOM-100 Operations............................................ 8

Figure 6.0 Typical DMOM-100 Tabulated Report Printout................................................... 12

Figure 7.0 Typical Directory Printout ........................................................................................ 19

Figure 8.0 Bus Bar Connection .................................................................................................. 23

iii

Operating Procedures DMOM-100™

1.0 INTRODUCTION

1.1 Applicability

This manual applies to the Model DMOM­100™, part number VIC-9000-100, which is
made by Vanguard Instruments Company.

1.2 Supersedure Notice

This manual is the basic issue for the Model
DMOM-100 and does not supersede any
published document.

1.3 General Description

The DMOM-100™ is a Digital Micro-Ohm
Meter for precisely measuring non-inductive
resistances from 1 micro-ohm to 300 milli­ohms. Applications include resistance
measurement of circuit-breaker contacts,
bushing joints, or any other low resistance.
It is field-portable, rugged, and easily
operated by first-time users having little
training (its microprocessor-driven, which
automates many functions). It has a 16-key
pushbutton pad for entering test parameters
and control functions, and a 4-line by 20­character LCD readout for displaying
control-option menus, measured resistance
values, and related identifying data. The
DMOM-100 has a built-in thermal printer,
which prints test data on 2.5-inch-wide
thermally sensitive paper.
Operation requires little more than
connecting the test leads to an unknown
resistance and selecting the test parameters;
It requires no calculation of lead-loss, hand­written notes, or the memorizing of detailed
routines. Operators select the test current
(10 to 100 amperes) and test time (5 to 60
seconds). Measured resistance data is
displayed and can be printed on the thermal
printer. The measured resistance data can
also be stored (up to 63 records of 96
readings each) in FLASH EEPROM
memory; Operators can recall the stored
resistance-measurements and related data at
a later time for review and printing.

1.4 Functional Description

DMOM-100 operation is based on the
electrical relationships described by Ohm’s
law: R=V/I, where I is a known test current
and V is the voltage across the unknown
resistance (e.g., breaker contacts). Since the
test current through the unknown resistance
is known and voltage across it is read by the
microprocessor, the resistance is calculated
using Ohm’s law.
The DMOM-100 test voltage is supplied
by a filtered direct-current power supply. A
precisely regulated constant-current source
controls the current ramps up/down time and
the test current. The dc test current (10 to
100 amps) slowly ramps up/down, which
virtually eliminates magnetically induced
transients; thus, the risk of inductively

tripping a circuit-breaker’s bus differential
relay is virtually non-existent.

DMOM-100 voltmeter test leads are run
separately from the current-bearing test
leads to the resistive load; thus, voltages are
measured at the terminals of the resistance
being measured, eliminating error from the
I•R voltage drop in the test current cables.
The DMOM-100 makes precise micro­ohm measurements possible without
calculating compensation for test-current­lead resistance errors.

1.5 Furnished Test Accessories

The DMOM-100 is supplied with a power
cord, a roll of 2.5-inch-wide printer paper,
and one 35-foot test cable set with quick­disconnect plugs to the unit and heavy-duty
alligator clamps to the load. Heavy-duty
welding-type C-clamps (see Appendix B)
are also available as optional accessories (C­clamps allow test- lead connection to a wide
variety of bushing sizes, bus bars, and many
other junctions that require low-contact
resistance).

1

Operating Procedures DMOM-100™

2.0 DMOM-100 SPECIFICATIONS
Table 1.0 DMOM-100 Specifications and Leading Particulars

MODEL .............................................DMOM-100 (part number VIC-9000-100)

TYPE..……… ..................................Special-purpose test equipment, portable; 100-ampere,

Digital Micro-Ohm Meter

POWER ............................................85 to 132 V ac or 200-240 V ac (selectable), 50/60 Hz

SIZE (inches) ....................................16.8 wide by 12.6 high by 10.6 deep

WEIGHT............................................ Less than 21 lbs

TEST CURRENT .............................. 10 to 100 amperes

RESISTANCE READING RANGE ...1 micro-ohm to 300 milliohms

ACCURACY .....................................±1% reading, ± 1 count

DISPLAY ..........................................LCD, 4-line by 20-character, back lighted

CONTROLS......................................Keypad: 10 number keys and 6 function keys

COMPUTER INTERFACE ................RS-232C

PRINTER ..........................................Thermal printer (prints on 2.5-inch-wide thermal paper)

ENVIRONMENT ...............................Operating: 0°C to 55°C; Storage: -40°C to 65°C

FURNISHED ..................................... One power cord, one 35-foot test cable set,

One cable bag

EXPENDABLES ............................... Paper, thermally sensitive, 2.5-inch wide roll

(VIC part # TP-3)

WARRANTY ..................................... One-year warranty on parts and labor; post warranty

service contracts available

NOTE:
THE ABOVE SPECIFICATIONS ARE VALID AT NOMINAL OPERATING VOLTAGE AND AT A TEMPERATURE OF 25°C
(77°F)
DMOM-100 SPECIFICATIONS MAY BE UPGRADED AND CHANGED WITHOUT PRIOR NOTICE.

2

Operating Procedures DMOM-100™

3.0 CONTROLS AND INDICATORS

(See Figure 1.0 and refer to Table 2.0).

The DMOM-100 controls and indicators
are shown in a panel illustration (see Figure

1.0). Pointing leader lines reference each

item in the figure with an index number.
Each index number is cross-referenced to a
functional description in Table 2.0, which
describes the purpose of each item on the

control panel. Although the purpose of
these controls and the display may seem
obvious, users should become familiar with
them before attempting to use the DMOM­100. However, accidental misuse of the
controls will usually cause no serious loss of
data or equipment damage. First-time users
should review and become familiar with the
Safety Summary located in the front section
of this manual.

Figure 1.0 DMOM-100 Control Panel (Controls and Indicators)

3

Operating Procedures DMOM-100™

Table 2.0 DMOM-100 Controls and Indicators

Fig. 1
Index PANEL MARKING FUNCTIONAL DESCRIPTION

1

2

3

4

5

6

7

8

(no overall marking; keys are

individually marked—see

ON/OFF

RS-232C

(no marking) Display, back-lighted liquid crystal (LCD); 4-line

(no marking) Built-in thermal printer; prints test result data on

Figure 1)

HIGH CURRENT

PRESENT

(no marking) Voltage-sensing test-lead plug-in sockets (2), red;

(no marking) Test-current lead plug-in sockets (2), red;

Input power connector with third-wire safety
ground and 10A built-in circuit breaker.

Connector, 9-pin; Serial interface-port connector
(female DB type) to allow the DMOM-100 to
be controlled by an IBM-compatible PC.

PIN SIGNAL

2 Tx

3 Rx

5 Signal Gnd

by 20-character; sunlight readable; displays test
menus (operator options), status, and test results
(See Figure 2 for operating displays of control
steps in logical flow sequence).

2.5-inch-wide thermal paper.
Operating key-pad controls; 10 alpha-numeric

keys and 6 function keys (i.e., START, STOP,
CLEAR, ENTER, & CONTRAST/PAPER
positioning ∧ & ∨).

Warning indicator; red LED; Lights when high
current is running through the test leads.

reads voltage at test load.

conducts up to 100 amperes through unknown
resistances.

4

Operating Procedures DMOM-100™

4.0 PRETEST SETUP

4.1 Operating Voltages

The DMOM-100 operating voltages are
selectable between 90-130Vac, 50/60Hz or
210-240, 50/60Hz. Voltage selection is set

Table 3.0 Voltage Selection

VOLTAGE SELECTION TERMINAL BLOCK JUMPERS

90-130Vac Brown to blue & yellow to green

210-240Vac Blue to yellow

by the placement of jumpers on the power
terminal block as listed in Table 3.0 below
and Figures 2.0 and 3.0.

120Vac Jumper Installation

Figure 2.0 90 to 130Vac Jumper Setting

Figure 3.0 210 to 240Vac Jumper Setting

5

220Vac Jumper Installation

Operating Procedures DMOM-100™

4.2 DMOM-100 Printer Paper

The DMOM-100 printer uses 2.5-inch
wide thermal paper for printing test results.
We recommend that to maintain the highest
quality printing and to avoid paper jamming,
use paper supplied by our factory. Paper
can be ordered from two sources, as follows:

Vanguard Instruments Co, Inc.

1710 Grevillea Court

Ontario, CA 91761

Tel: [phone]

Fax: [phone]

Part Number: TP-3 Paper

OR

BG Instrument Co.

Route 1, Box 258

Mead, WA 99201

Tel: [phone]

Fax: [phone]

Part Number: TP-3 paper

4.3 DMOM-100 Cable Connections

The DMOM-100 is supplied with a 35­foot test cable set. Each cable consists of a
current-carrying cable and a voltage-sensing
cable. The current-carrying cable is
terminated with a 100-ampere male plug.
The sensing cable is terminated with a 25­ampere female plug. Insert the current-cable
plugs and voltage-sensing plugs into their
respective control-panel jacks (see Figure

4.0 below). Ensure that voltage plugs

(smaller) are inserted into jacks adjacent to
their companion current jacks (larger).

Figure 4.0 DMOM-100 Cable Connection

6

Operating Procedures DMOM-100™

5.0 OPERATING PROCEDURES

(Refer to Tables 4.0 through 12.0)

5.1 Operating Overview

(See Figure 5.0, for step-by-step flow.)
Procedures for operating the DMOM-100
are presented in tabular format, with a
different table for each of the main menus
(START and SETUP) procedures. Each
procedural step is indexed by number and
indicates an operator action, followed by a
description of the result or what should be
observed to confirm the action (setting the
stage for the next step). All operations are
described in step-by-step sequences and
begin with the start menu (shown below):

START MENU

1. RUN TEST 06/11/01

2. SETUP 12:23:01

3. CAL CHECK

Item 1 on this menu (RUN TEST) is the
procedure for measuring an unknown
resistance. Item 2 (SETUP) is for record
identification in the DMOM-100. Item 2
(SETUP) expands into a menu of support
functions. Item 3 (CAL CHECK) is a
performance-verification procedure for
checking key circuit functions (refer to table

11). All operator procedures begin with the
START MENU and may continue on the
SETUP MENU, with each step-by-step
procedure presented in tabular form.

SETUP MENU

1. ENTER ID

2. REVIEW RECORD

3. RESTORE RECORD

4. NEXT PAGE

The SETUP MENU lists 4 user options:
Item 1 (ENTER ID) is used to specify
identification record data (please observe
instructions in note 2 on Figure 5.0, Step-by-
Step Procedures for DMOM-100

Operations). Item 2 (REVIEW RECORD)
is used to review store records. Item 3
(RESTORE RECORD) is used to erase or
restore test records or to print a directory of
test records in stored memory. Item 4
(NEXT PAGE) is used to put the DMOM­100 under PC control or to set the time
and date clock.

5.2 Preparation

Plug unit power plug into power service
outlet. Set unit main power switch to ON
position. Plug test-lead cable plugs into red
jacks on control panel (ensure current and
voltage-sensing cables are plugged into
companion jacks). Connect current and
voltage-sensing test lead clamps to opposite
terminals of resistance to be measured.

5.3 Keying-in Data Characters

Unless otherwise prompted by the display,
keyed-in data is loaded by pressing the
ENTER key (which also changes the display
to go to the next screen). When using the
alpha/numeric keys (like telephone dial-in
pushbuttons; see item 5 of Figure 1.0) to
specify data characters: Press the key once
to set the number marked on the key. Press
the key a second time to set the first letter
marked on the key. Press the key a third
time to select the second letter marked on
the key. Press the key a fourth time to select
the third letter marked on the key.
Additional key presses will repeat the
selection cycle (e.g., 2, A, B, C, 2 . . .).
When the character of choice is selected,
press the ∧ key to advance to next character
space; press the ∨ key to back-space. Press
CLEAR to delete a selected character
(cursor must be on character to be deleted).
Again, press the “ENTER” key to load all
character selections.

7

Operating Procedures DMOM-100™

.

Figure 5.0 Step-by-Step Procedures for DMOM-100 Operations

8

Operating Procedures DMOM-100™

9

Operating Procedures DMOM-100™

5.4 Run Test Procedure

The following procedure describes the steps
to measure an unknown resistance.

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)

STEP ACTION

4-1

4-2

4-2a

Begin RUN TEST procedure: Press key no.
1 on START MENU. “SELECT TEST
CURRENT” menu appears.

Select test current: Press key for desired test
current. If a test current is other than listed
in items 1 thru 4, then press key # 5 for user­defined (CUSTOM) test current and go to
step 4-2a. If menu items 1 thru 4 were
pressed, then SELECT BURN-IN TIME
menu appears. Go to step 4-3.

NOTE

Select 5-second burn-in time in this
example.
Custom select burn-in current level entry by
pressing numeric keys, then press ENTER
and go to step 4-3.

NOTE

For this example, we used 100A test current.

NOTE

The red HIGH CURRENT PRESENT

indicator will begin flashing when the test

current are applied to resistance load.

DMOM-100 DISPLAY

SELECT TEST CURRENT:

1. 10A 2. 25A

3. 50A 4. 100A

5. CUSTOM

SELECT BURN-IN TIME:

1. 5 SEC 2. 10 SEC

3. 20 SEC 4. 30 SEC

5. 60 SEC

ENTER TEST CURRENT

(10 to 100)

100 AMPS

4-3

4-4

4-5

Select burn-in time by pressing the key (1 -

6) that corresponds to desired burn-in time
(see display on step 4-2). Display of
selected test current and burn-in time
appears.
Press START key to run resistance
measurement test. Display of ramping
current and percent of ramp level displays
with the notice TEST IN PROGRESS.
When test current has ramped up to the
specified level (current is at 100%), the test
result display appears automatically.
Automatic; no operator action required.
Current, burn-in time, and resistance
measurement changes on the display during
burn-in. At the end of burn-in time, final
resistance measurement displays.

10

CURRENT: 100 AMPS
BURN - IN: 5 SEC
“START” TO RUN TEST

CURRENT: 100 AMPS
RAMPING CURRENT 10%

TEST IN PROGRESS

PLEASE WAIT

CURRENT: 100 AMPS
BURN-IN: 5 SEC

500.5 MICRO-OHMS
PLEASE WAIT

Operating Procedures DMOM-100™

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)

(Continued)

STEP ACTION

4-6

Automatic; no operator action required.
At the end of burn-in time final resistance
displays. Press the “ENTER” key to go to
next display.

DMOM-100 DISPLAY

FINAL RESISTANCE
I= 100 AMPS

500.5 MICRO-OHMS

4-7

4-8

4-9

4-10

Automatic: Print test result option display.

Printing option: When the “PRINT TEST
RESULTS?” displays, press #1 key to
print.
Typical print out is shown in Figure 6.0.
If no printout is needed, then go to next
step.
Automatic; No operator action is required.
When test report completes printing,
KEEP THIS READING?” displays.

“KEEP THIS READING?” If the tested
resistance measurement is to be stored in
test record buffer, press # 1 key (YES). If
no record of the test is to be stored in
memory, then press # 2 key (NO).

PRINT RESULTS?

1. YES

2. NO

PRINTING

PLEASE WAIT

KEEP THIS READING?

1. YES

2. NO

TEST SAVED

4-11

4-12

4-13

Automatic; No operator action is required.
“RUN ANOTHER TEST?” displays.

If another test needs to be run, then press
#1 key (YES). Beginning test options
(SELECT TEST CURRENT:) menu
displays (return to step # 4-1). If another
test is not needed, then press #2 key (NO)
and go to step 4-14.
Return to step #1 to setup for another test
(repeat sequence from step 4-1 to step 4-

11.

10

RUN ANOTHER TEST?

1. YES

2. NO

SELECT TEST CURRENT:

1. 10A 2. 25A

3. 50A 4. 100A

5. CUSTOM

Step 4-1 thru 4-11 displays repeat.

Operating Procedures DMOM-100™

Table 4.0 Run Test Procedure (Measure an Unknown Resistance)

(Continued)

STEP ACTION

4-14

“SAVE THIS RECORD?” displays when
another test was not selected in step 4-12.
Test record contains all the reading taken
in this test.

DMOM-100 DISPLAY

SAVE THIS TEST RECORD?

1. YES

2. NO

4-15

4-16

4-17

To save this record, press key #1 (YES). If
test record is not to be saved, press key #2
(NO) and go to step 4-17.

NOTE

A test record is saved in Flash
EEPROM. A record number
will be automatically assigned
to the record by the DMOM­100. (The Test record was

assigned #2 in this example).
When record is saved (record # shows on
display), press ENTER to return to START
MENU, which presents options for all
step-by-step operating procedures.

Pressing key #2 (NO) on SAVE THIS
TEST RECORD (see step 4-14) causes the
ARE YOU SURE? Prompt (shown at
right).

RECORD NUMBER 2
HAS BEEN SAVED!

1. RUN TEST 06/11/01

2. SETUP 12:24:01

3. CAL CHECK

ARE YOU SURE?
DATA WILL BE LOST!

1. DO NOT SAVE RECORD

2. SAVE RECORD

4-18

This ends the RUN TEST procedure.

In response to ARE YOU SURE? If key
#1 is pressed, test record will be erased
from working buffer and display returns to
“START MENU”. If key #2 is pressed,
the test record will be saved in Flash
EEPROM. Test record number assigned to
this record will also be displayed. Exit the
RECORD SAVED display by pressing
ENTER, which returns display to the
START MENU.

1. RUN TEST

2. SETUP

3. CAL CHECK

11

Operating Procedures DMOM-100™

Figure 6.0 Typical DMOM-100 Tabulated Report Printout

12

Operating Procedures DMOM-100™

5.5 Enter ID Procedure

This procedure allows the user to enter the
equipment identification to the test record.

Table 5.0 Run Setup Procedure (test-record, site, and equipment identification)

STEP ACTION

5-1

Press key # 2 (SETUP MENU) on START
MENU to go to Setup menu (shown at
right).

DMOM-100 DISPLAY

1. ENTER ID

2. REVIEW RECORD

3. RESTORE RECORD

4. NEXT PAGE

5-2

5-3

5-4

5-5

On SETUP MENU, press #1 key (ENTER
ID) to begin identification entry (begins
with “COMPANY” display).
Note: Other setup options go to the
following procedural tables:

1. Review Record procedure in Table 6.0

2. Restore Record Procedure in Table 7.0

3. NEXT PAGE procedures.
Enter utility COMPANY name using
alpha/ numeric keypad. When the
COMPANY name is keyed in, press
ENTER to load keyed data and go to
STATION identification display.

Enter utility STATION name using alpha/
numeric keypad. When STATION name
is keyed in, press ENTER to load keyed
data and go to CIRCUIT identification
display.
Enter utility CIRCUIT name using alpha/
numeric keypad. When CIRCUIT name is
keyed in, press ENTER to load keyed data
and go to MANUFACTURER
identification display.

COMPANY:

STATION:

CIRCUIT:

MANUFACTURER:

5-6

Enter tested item’s MANUFACTURER
name using alpha/numeric keys. When
the manufacturer’s name is keyed in, press
ENTER to load keyed data and go to
MODEL identification display.

13

MODEL:

Operating Procedures DMOM-100™

Table 5.0 Run Setup Procedure (test-record, site, and equipment identification)

(continued)

STEP ACTION

5-7

Enter test item’s MODEL using
alpha/numeric keypad. When item’s
MODEL is keyed in, press ENTER to load
keyed data and go to SERIAL NUMBER
identification display.

DMOM-100 DISPLAY

SERIAL NUMBER:

5-8

5-9

5-10

This completes the ENTER ID procedure.

Enter test item’s SERIAL NUMBER using
alpha/numeric key pad. When serial number
is keyed in, press ENTER to load keyed-in
data and go to KVA RATING display.

Enter test items KVA RATING using alpha/
numeric keypad. When KVA RATING is
keyed in, press ENTER to load keyed-in data
and go to OPERATOR identification display.

Enter test OPERATOR name, using alpha/
numeric keypad. When OPERATOR name is
keyed in, press ENTER to load keyed-in data
and return to START MENU display.

KVA RATING:

OPERATOR:

1. RUN TEST 06/11/01

2. SETUP 12:26:01

3. CAL CHECK

14

Operating Procedures DMOM-100™

5.6 Review Record Procedure

This procedure describes steps to review a
test record residing in DMOM-100
working memory. The user can view the
record on the LCD display or from a thermal
printout.

Table 6.0 Review Record Procedure

STEP ACTION

6-1

On START MENU, press key #2 (SETUP) to
select SETUP MENU (shown at right).

To review a test record stored in Flash
EEPROM, the user must first restore test
record from Flash EEPROM to working
memory (see paragraph 5.7)

DMOM-100 DISPLAY

1. ENTER ID

2. REVIEW RECORD

3. RESTORE RECORD

4. NEXT PAGE

NOTE

6-2

6-3

6-4

6-5

Press key#2 (REVIEW RECORD) on SETUP
MENU, which displays the REVIEW
RECORD menu options.

If test-result records are to be printed out on
paper, press #2 key (PRINT TEST RECORD)
on the REVIEW RECORD display. Test
records print out as the printing notice
displays. When printout of test records is
complete, display returns to START MENU,
which ends the procedure for this branch of
the SETUP procedure.
If records are to be viewed in sequence
(scrolled), press key #1 (SCROLL TEST
RECORDS) on the REVIEW RECORD
display. Scroll through test records (use ∧
and ∨ keys to scroll). When record of interest
appears, stop scrolling and press ENTER.
When the scrolled data record of interest
displays, press ENTER key. Selected test
record ID displays the selected test record
number. When it is confirmed that the correct
test record ID has been selected, press
ENTER to display the number of tests in the
record, the time and date of the selected test.

REVIEW RECORD

1. SCROLL TEST RECORD

2. PRINT TEST RECORD

PLEASE WAIT

PRINTING . . .

RECORD ID INFO:
1710
VIC
ABC

2 TESTS

06/11/01 17:27:00

15

Operating Procedures DMOM-100™

Table 6.0 Review Record Procedure (continued)

STEP ACTION

6-6

6-7

When the record number, with the time and
date of the test, displays and is noted, press
the ENTER key: Display lists full data of the
test, including test number, test current,
burn-in time, and the measured resistance
value.

NOTE

The test record in this example contains 2
tests.

Press ∧ key to advance to next test. Press ∨
key to return to previous test.

DMOM-100 DISPLAY

TEST NUMBER: 1
TEST CURRENT: 100A
BURN - IN TIME: 5 Sec

500.3 MICRO-OHMS

TEST NUMBER: 2
TEST CURRENT: 50A
BURN - IN TIME: 5 Sec

500.1 MICRO-OHMS

6-8

Press STOP to return to START MENU.
This completes the review record procedure.

Display returns to START MENU.

16

Operating Procedures DMOM-100™

5.7 Restore Record Procedure

This procedure describes the steps to recall a
test record stored in the DMOM-100
Flash memory.

Table 7.0 Restore Record Procedures

STEP ACTION

7-1

On START MENU, press #2 key (SETUP)
to display the SETUP MENU.

1. ENTER ID

2. REVIEW RECORD

3. RESTORE RECORD

4. NEXT PAGE

DMOM-100 DISPLAY

7-2

7-3

7-4

7-5

7-6

On SETUP MENU, press #3 key
(RESTORE RECORD) to display menu of
options (Restore Record, Directory, Erase
Record).

Press #1 key (RESTORE RECORD) to
display menu of restore records options.

Press key #1 (ENTER RECORD
NUMBER) to display prompt to enter
record number to restore. Press key #2
(SCROLL TO SELECT) and go to step 7-6
for Records Directory display.
When record number has been keyed in,
press ENTER to restore the selected record.
When the display confirms that the record is
restored (brief display time) display returns
to REVIEW RECORD options menu
(resume procedure at step 7-9 in Table 7.0).
In the RESTORE RECORD menu, press
key #2 to display a scrolled Records
Directory.

1. RESTORE RECORD

2. DIRECTORY

3. ERASE RECORD

RESTORE RECORD

1. ENTER RECORD NUMBER

2. SCROLL TO SELECT

RESTORE RECORD
NUMBER:

RECORD RESTORED!

RECORDS DIRECTORY

“UP TO SCROLL FWD
“DWN” TO SCROLL RVS

7-7

In the Records Directory, use ∧ and ∨ keys
to scroll through the directory listings of test
records. When the test record of interest
displays, press the ENTER key to display
the record number and the time and date of
the selected test.

17

#1 06/11/01 17:27:00

1710
VIC

Operating Procedures DMOM-100™

Table 7.0 Restore Record Procedures (Continued)

STEP ACTION DMOM-100 DISPLAY

7-8

7-9

Press ENTER key again to restore selected
test record. A Record Restored
confirmation displays, after which the
display returns to REVIEW RECORD
(resumes by returning to step 7-9).
Test ENTER key again to display
REVIEW RECORD option.

RECORD RESTORED!

REVIEW RECORD

1. SCROLL TEST ECORD

2. PRINT TEST RECORD

7-10

This completes the Restore Record Procedure.

Press key #1 to display data on LCD (see
step 6-5). Press key #2 to print test record.

18

Operating Procedures DMOM-100™

5.8 Print Test Record Directory Procedure

This procedure describes the steps to print
the test record directory that is stored in the
DMOM-100 Flash EEPROM.

Table 8.0 Print Test Record Directory

STEP ACTION

8-1

On the RESTORE RECORD display (step 7-

2), press key #2 (DIRECTORY) to go to a
print menu of print options.

DMOM-100 DISPLAY

PRINT DIRECTORY

1. FULL DIRECTORY

2. SHORT DIRECTORY

8-2

PRINT DIRECTORY choice is to print either
a FULL DIRECTORY or a SHORT
DIRECTORY. Regardless of which choice is
selected, the PRINTING DIRECTORY notice
displays as the selected directory prints out a
paper copy. When printout is completed,
display returns to the START MENU. This
ends the directory procedures.

NOTE

The Short directory printout lists the
last 10 test records stored in Flash
EEPROM memory.

PRINTING DIRECTORY

Figure 7.0 Typical Directory Printout

19

Operating Procedures DMOM-100™

5.9 Test Record Procedure

This procedure describes the steps to delete
a test record or all test records stored in the
DMOM-100 Flash EEPROM.

Table 9.0 Erase Test Record Procedure

STEP ACTION

9-1

On the RESTORE RECORD display (step 7-

2), press key #3 (ERASE RECORD) to
display an ERASE RECORD menu of
options (shown at right).

DMOM-100 DISPLAY

ERASE RECORD

1.ERASE SINGLE RECORD

2. ERASE ALL RECORDS

9-2

9-3

9-4

9-5

9-6

On the ERASE RECORD menu display,
press key #1 to erase a single record.

When this selection is made, the user shall
enter record number then press ENTER key
to confirm. Press ENTER key again to
return to main menu.

NOTE

Press STOP key to abort.
Press key #2 to erase all records. Press
ENTER key to confirm.

NOTE

Press STOP key to abort.

Press ENTER key to confirm.

Press ENTER key to return to main menu.

ERASE RECORD
NUMBER: XX

RECORD NUMBER: XX
ERASED!

ERASE ALL RECORDS!
Are you SURE?
“ENTER” TO CONTINUE

ERASING RECORDS
PLEASE WAIT

RECORDS ERASED!

20

Operating Procedures DMOM-100™

5.10 Computer Interface Procedure

This procedure describes the steps to put the
DMOM-100 in computer interface.

Table 10.0 Computer Interface Procedures

STEP ACTION

10-1

Press key #4 (NEXT PAGE) on the
SETUP MENU to display the
COMPUTER CONTROL interface (ITF)
and SET TIME options menu.

DMOM-100 DISPLAY

1. COMPUTER CONTROL

2. SET TIME

10-2

5.11 Set Clock Procedures

This procedure describes the steps to set the
DMOM-100 real time clock.

STEP ACTION

11-1

Press key #1 (COMPUTER CONTROL)
to place the DMOM-100 under an
external PC’s control. PC software
permits DMOM100 test record to be
transferred to the PC.
To end the PC control, press the STOP
key, which will restore control to the
keypad and return to the START MENU
display.

Table 11.0 Set Clock Procedures

When key #4 (NEXT PAGE) is pressed on
the SETUP MENU, the COMPUTER
CONTROL interface (ITF) and SET TIME
options menu displays.

COMPUTER ITF MODE

DMOM-100 DISPLAY

1. COMPUTER CONTROL

2. SET TIME

11-2

11-3

This completes the Set Clock procedure.

On the first NEXT PAGE menu, press key #2
(SET TIME) to go to steps for setting the
time and date clock.

Enter month, day, year, hour, minute, and
second for real-time clock. Display will now
return to the START MENU.

ENTER
MM-DD-YY HH-MM-SS

21

Operating Procedures DMOM-100™

5.12 Calibration Check

This procedure describes the steps to
perform the calibration check on the
DMOM-100.

Table 12.0 Calibration Check Procedure

STEP ACTION

12-1

12-2

12-3

The calibration check is a functional
verification self-test of the DMOM-100.
This procedure begins by pressing key #3
on the START MENU, which displays a
calibration check prompt to attach test lead
clips to a shorting bar (See Figure 8.0).
When test lead clips are attached to a
shorting bar, press ENTER key to proceed
with self-testing process. The self-test
feature checks ramping current and displays
current at each point in a continuous ramp.
When the ramp flattens, the remaining self­check automatically sequences without
operator control. If any circuit fails (does
not pass), then do not measure any
resistance until the problem is corrected.
Automatic; no operator action required.

DMOM-100 DISPLAY

CALIBRATION CHECK

CONNECT SHORTING BAR
“ENTER” TO CONTINUE

RUNNING CAL CHECK…
RAMPING CURRENT: xx%

RUNNING CAL CHECK…
CURRENT RAMP CKT

“PASS”

12-4

12-5

12-6

12-7

Automatic; no operator action required.

RUNNING CAL CHECK…
ZERO CKT CHECK

“PASS”

Automatic; no operator action required.

RUNNING CAL CHECK…
FSCALE CKT CHECK

“PASS”

Automatic; no operator action required.

RUNNING CAL CHECK…
MEAS CKT CHECK

“PASS”

Automatic; no operator action required.

RUNNING CAL CHECK…
RAMPING CURRENT: xx%

22

Operating Procedures DMOM-100™

Table 12.0 Calibration Check Procedure (Continued)

STEP ACTION OBSERVE RESULT

12-8

Automatic; no operator action required.

CAL CHECK COMPLETE
PRESS ANY KEY

12-9

Press any key to end CAL CHECK. Display returns to START MENU.

Figure 8.0 Bus Bar Connection

23

Operating Procedures DMOM-100™

APPENDIX A

DMOM-100 Troubleshooting Guide

Symptom Possible Problem Solution

Ite

m

1 Reading is incorrect. 1. Poor connection at the

Clips.

2. Broken sensing lead.

2 No Test Current.

(Current % read zero)
and resistance
reading=0

3 Have test current but

resistance reading = 0.

1. No test current going
through DUT.

2. Drive circuit not
working.

1. Broken sense leads.

2. Reverse sense leads.

1.Check connection to make sure
sensing and current teeth are
touching the device under test
(DUT).

2. Inspect sensing cables.

1. Check Connection to DUT.

2. Run Calibration Test.

1. Inspect sense leads.

NOTE: DUT=Device Under Test

24

Operating Procedures DMOM-100™

APPENDIX B

DMOM-100 Cable Accessories

Plastic Quick-Disconnect Clip, C-Clamp, Current Connector, and Sensing-Wire Connector

C-Clamp

Plastic Clip

Current Connector

Sensing wire Connector

25

1710 Grevillea Court, Ontario, CA 91761, USA

Phone: [phone] Fax: [phone]

Website: http//www.vanguard-instruments.com

DMOM-100 06/22/01: OAK