Vanguard WRM-40 - Manual (Page 59)

REV 3 WRM-10P AND WRM-40 USER’S MANUAL
55
4.0 WRM-10P/40 SPECIAL FEATURES
4.1 Bypassing Resistance Reading Delay
When the WRM first applies the test voltage to the transformers winding, the current is
increased slowly until the transformer’s winding reaches saturation. During this period, the
resistance value varies substantially and the readings may appear unstable to the operator. The
WRM has a built-in 3 minute delay between the start of the test and when the resistance value
is displayed on the LCD. This feature eliminates the possibility of early erroneous readings.
Depending on the transformer size, the delay may be shorter or longer than 3 minutes.
The operator can bypass this delay and observe the test results immediately. To bypass this
delay:
Start at the “START-UP” menu:
Press the numbers
[9]
,
[8]
, and
[7]
in sequence. The following screen will be displayed
momentarily:
You will then be returned to the “START-UP” menu.
Once the Quick Display Mode has been set, the WRM will display resistance values as soon as
measurements are made. This bypass setting will remain active until the unit is turned off.
When the unit is turned on again, it will use the default 3 minute delay before displaying
resistance values.
QUICK DISPLAY MODE
SET!
1. TEST XFMR 11/02/09
2. SETUP 12:33:01
3. USER DIAG