Vanguard ATRT-01_01B_01D - Manual (Page 29)

Model ATRT-01 (v) Operating Instructions
Rev 02
May 02, 2002
28
25-4 ATRT-01 Quick-Test Mode
The Quick-Test mode allows the user to measure transformer turn ratio with a single button
command. To initiate the test, press and hole the “START” key for one second then release. The
ATRT-01 will display the message below on the LCD.
Figure 25-4 Quick Test Menu
25-5 Test Single Phase Transformer Using Preset Voltage Table
This special mode allows the user to quickly test a single phase transformer ratio and compare it’s
reading against a name plate voltage. There are 46 transformer name plate voltages pre-program in
the ATRT-01. To access this mode, press “CLEAR” key from the main menu (Fig 16-0); the
ATRT-01 will display the following message:
Figure 25-5A Preset Voltage Menu
To select different name plate voltages, use the up or down arrow keys “
? ? ”. To initiate a test,
press the “START” key. A typical test result is shown below:
Figure 25-5B Test Result Menu
Note:
In order to have the “PASS TTR TEST” message display, the reading error should be less or equal
to 0.5% and the winding should be in phase.
“QUICK TEST”
HOLD START KEY UNTIL
BEEP FOR QUICK TEST
? ? SCROLL TO SELECT
“START” TO RUN TEST
H 2,400
X 240
M-RATIO= +10.001
ERROR= 0.11%
PASS TTR TEST
2,400/240 R=10.00