Vanguard Accu-Trans - Manual (Page 12)

Accu-Trans

Operating Procedures
8
4.2 Accu-Trans 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.
4.3 Accu-Trans Printer Paper Control
To advance the Accu-Trans printer paper,
press and release the “Paper
∧
Contrast”
switch.
To retract the Accu-Trans printer paper,
press and release the “Paper
∨
Contrast”
switch.
5.0 ACCU-TRANS PRINTER PAPER
The Accu-Trans built-in thermal printer uses
2.5-inch wide thermal paper for printing test
results. To maintain the highest quality test-
result printing and to avoid paper jamming,
the use of paper supplied by our factory is
highly recommended. Additional paper can
be ordered from either of the two sources
listed below:
Vanguard Instruments Co, Inc.
1710 Grevillea Court
Ontario, CA 91761
Tel: 909-923-9390
Fax: 909-923-9391
Part Number: TP-3 Paper
OR
BG Instrument Co.
13607 E. Trent Avenue
Spokane, WA 99216
Tel: 509-893-9881
Fax: 509-893-9803
Part Number: TP-3 paper
6.0 OPERATING PROCEDURES
Before using the Accu-Trans for measuring
any resistance, operators should review the
Summary of Step-by-Step Operation of the
Accu-Trans found in Figure 4.0. Accu-
Trans operations are simple, requiring the
selection of choices from the display menus
and responding to the displayed prompts.
However, first-time operators should review
Figure 1.0 to become familiar with the total
Accu-Trans operation and the logical
branching for various test options. (More
experienced operators may use this figure as
a handy help and reference guide.
WARNING
Do not touch or disconnect any test lead
that is connected to a transformer
terminal while high current is being
conducted during any test. Failure to
heed this warning can result in lethal
electrical shock to personnel and/or
damage to equipment.
6.1 General Procedures
a) Ground Accu-Trans to substation ground
(item 5 in Figure 1.0).
b) Plug Accu-Trans power cable into a
power outlet.
c) Insert current-cable plugs and voltage-
sensing cable plugs into respective control-
panel jacks (index 8 of Figure 1.0). Ensure
that voltage plugs are plugged into jacks that
are adjacent to companion current jacks.
d) Attach test-cable clamps to transformer
terminals of winding that is to be measured
(or if load is not an inductance, simply
attach test leads to opposite terminals of the
resistive load).
e) Turn on Accu-Trans power (item 4 in
Figure 1) by pressing “I” on rocker switch.
f) Observe that after configuration data is
displayed briefly, then the start-up menu
displays (with selection options for “1. RUN
TEST,” “2. SETUP”).