Vanguard Instruments Company ACCU-TRANS II Series, Operating Instructions Manual

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Accu-Trans     Operating Procedures
10
6.2 Step-by-Step Procedures at Start-
Up Menu
6.2.1 START-UP Menu:
Observe that the Start-Up menu displays as
shown below:
a) Press key #1 to start test. Press #2 to
select other options (i.e. enter record-
identification data, recall test results, etc.)
6.2.2 Test Transformer Procedure
The following procedure shows the steps to
get a resistance reading from a device under
test.
a)
To start a test, press key #1 (TEST
XFMR) from main menu. When the test
mode is selected, a “WARNING!” display is
shown below:
This warning reminds operators that the next
sequence of test steps will run current
through the load, which, if inductive, will
cause lethal voltages to be generated if the
cables are disconnected before the current is
ramped down to zero.
b) Press the ENTER key and proceed to the
next step. The start test display appears:
c)
Press the START key to Start test. The
test-in progress display appears below:
This display doesn’t prompt any action; but
simply reminds the user that a test is in
progress. The time for this display depends
on size of the winding’s inductance and the
test mode selected.
The Accu-Trans determines when the
resistance reading is stable and shows
resistance value on LCD as follows:
The Accu-Trans continues to apply the test
voltage on the transformer’s winding and
updates the resistance value on the display.
d)
The user presses STOP key to retain this
data and go to the next step. (If the displayed
data is not O.K., press CLEAR to return to
the Start-Up Menu.)
e)
Press ENTER key and go to the next
step. The print-option menu is now
displayed.
f) Press key #1 to print test results. Typical
Accu-Trans test report is shown in figure 5.
g) Select key #2 to bypass printing results.
**********WARNING!**********
DANGEROUS FLASH-OVER
MAY OCCUR IF CABLES
ARE DISCONNECTED!
TEST IN PROGRESS
PLEASE WAIT………
* XFMR CHARGING*
MEASURED RESISTANCE
“STOP” TO ACCEPT
120.0 MICRO-OHM
MEASURED RESISTANCE
FINAL RESISTANCE
120.0 MICRO-OHM
PRINT TEST RESULTS
1. YES
2. NO
1. TEST XFMR 04/15/01
2. SETUP 09:28:03