Custom Test; Figure; Custom Test Display Screen - Megger OTS 60AF Guia Del Usuario

Operation
This option is included so that users can program their own test parameters. Custom test is therefore
ideal for setting up other oil testing specifications. Up to five separate CUSTOM tests can be
programmed, and once established are stored in memory for use on future occasions.
Programming a CUSTOM test
1. From the main menu select CUSTOM. The display will appear similar to figure 14.
The three control keys have the functions NEXT, SELECT and MENU.
Pressing the NEXT key moves on to the next (of the 5 available) CUSTOM tests.
Pressing MENU moves back to the main menu. Pressing SELECT moves into the programming
and testing options for that particular CUSTOM test. The control key functions changes to
START, PROGRAM and QUIT. Pressing QUIT moves back to the previous display. Pressing
START initiates a test sequence based upon the parameters displayed. Pressing PROGRAM
enables the test parameters to be altered.
2. To alter the test parameters, press the centre key labelled PROGRAM. The function of the three
control keys now become CHANGE, PRINT and QUIT. Pressing QUIT moves back to the
previous sub-menu and pressing PRINT provides a print-out of the test parameters in view on
the display.
3. Press the left hand CHANGE key to enter the sub-menu for setting the INITIAL STAND TIME.
Use the left and centre keys to decrease and increase respectively, the minutes and seconds
shown on the display. Press SELECT when the desired value is set on the display; this makes
the selection and moves into the sub-menu for the next parameter to be set.
Note:- Repeated presses of a key changes the value in 5 second steps. Pressing and holding a key
changes the value in 5 second steps to the next minute value and thereafter in 1 minute steps.
(Maximum value 99 minutes 55 seconds).
4. The number of individual tests in a sequence may now be set; again using the the left and centre
keys to make the selection. Press SELECT when the desired value is displayed; this makes the
selection and moves into the sub-menu for the next parameter to be set.
Note:- Repeated presses of a key changes the value in steps of one. Pressing and holding a key
changes the value in steps of one to the next five values and thereafter in steps of five.
(Maximum value 99).
5. The rate of rise of the test voltage may now be set; again use the left and centre keys to set the
desired rise rate and press SELECT when the desired value is displayed.
Note:- A press of a key changes the value by 0,5 kV/s and there is no rapid change facility. (Maximum
value 5 kV/s).
6. The display now changes to offer oil stirring options. Repeated pressing of the centre key
marked MODE changes the stirring choice through MAGNETIC, IMPELLER, or NONE.
If NONE is selected, there will be no intermediate stir. Repeated pressing of the left hand key
marked CONT. turns continuous stirring 'On' or 'Off'. If CONT. is selected, there will be no
intermediate stand. Press SELECT when the desired options are showing on the display.
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CUSTOM Test

CUSTOM TEST
NO. OF TESTS
RISE RATE
STIR TIME
STAND TIME
SELECT
NEXT
Figure 14. CUSTOM Test display screen.
1
2:0
0:30
0:45
MENU