Vanguard DMOM-200 - Manual (Page 8)

Operating Procedures DMOM-200™
4
Table 2.0 DMOM-200  Controls and Indicators
Fig. 1
Index PANEL MARKING FUNCTIONAL DESCRIPTION
1 ON/OFF Input power connector with third-wire safety
ground and 10A built-in circuit breaker.
2 RS-232C Connector, 9-pin; Serial interface-port connector
(female DB type) to allow the DMOM-200
 to
be controlled by an IBM-compatible PC.
PIN SIGNAL
2 Tx
3 Rx
5 Signal Gnd
3 (no marking) Display, back-lighted liquid crystal (LCD); 4-line
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).
4 (no marking) Built-in thermal printer; prints test result data on
2.5-inch-wide thermal paper.
5 (no overall marking; keys are
individually marked—see
Figure 1)
Operating key-pad controls; 10 alpha-numeric
keys and 6 function keys (i.e., START, STOP,
CLEAR, ENTER, & CONTRAST/PAPER
positioning
∧ & ∨).
6 HIGH CURRENT
PRESENT
Warning indicator; red LED; Lights when high
current is running through the test leads.
7 (no marking) Voltage-sensing test-lead plug-in sockets (2), red;
reads voltage at test load.
8 (no marking) Test-current lead plug-in sockets (2), red;
conducts up to 100 amperes through unknown
resistances.
3.1 DMOM-200  LCD Contrast
Control
To Darken the LCD display, press and hold
the “Paper
∧ Contrast” switch for two
seconds; to lighten the LCD display, press
and hold the “Paper
∨ Contrast” switch for
two seconds.
3.2 DMOM-200  Printer Control
To advance printer paper, press “Paper ∧
Contrast” switch once. Paper will advance
from printer. Press “Paper
∨ Contrast”
switch once, paper will advance backward
from printer.
3.3 RS-232C Computer-Interface port
An IBM PC software package is supplied
with each DMOM-200
 allows the user to
retrieve test records stored in the DMOM-
200
 memory.