Vanguard CT-3500 - Manual (Page 8)

Model CT-3500

Operating Procedures
4
Table 2. Functional Description of Controls and Indicators
Fig. 1
Index #
ADJACENT PANEL
MARKING
FUNCTIONAL DESCRIPTION
1 TRIGGER
(300V MAX)
Connector, 5-pin, male; trigger input starts CT-
3500 three timers; leads are connected to
breaker-Trip and Close coils. Trigger voltage
ranges from 24 to 300 volts dc or peak ac.
2
RS-232C
Serial interface-port connector (9-pin, DB type)
lets CT-3500 be controlled by an IBM type PC.
PIN SIGNAL
2 Tx
3 Rx
5 Signal Ground
3 none Display, 4-line by 20-character LCD, backlit;
displays menus, prompts, and test-result data.
4 120/240 Vac, 1A, 50-60 Hz Input power plug and ON/OFF rocker switch
5
GROUND
Threaded grounding stud; 5/16-18 with wing
nut; Safety Ground; Must be connected to
station ground before hookup and testing.
6 none Built-in thermal printer; prints test result data
on 2.5-inch-wide thermal paper.
7 none Keypad; ten alpha/numeric and 6 function keys
(momentary-contact pushbuttons); functions
are: ENTER, START, CLEAR, STOP, Up (
∧
)
and down (
∨
)--paper control pushbuttons; used
for test menu selections, and data entries.
8
CONTACT
Contact cable connector, 16-pin male. Contact
cable contains 3 contact leads (phase A, B, or
C) and one common lead.
3.2 CT-3500 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.
3.3 CT-3500 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.
3.4 RS-232C Computer-Interface port
An IBM PC software package is supplied
with each CT-3500 allows the user to
retrieve test records stored in the CT-3500
memory.