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14.
On completion of the test(s) (1, 2 or 3 may have been performed), the appropriate PASS or FAIL
message is displayed. Pressing the right hand key labelled NEW returns to the EQUIPMENT
CATEGORY selection display screen. Pressing the left hand key labelled VIEWchanges the top
half of the display to list the breakdown voltage(s), together with the pass limit voltage. The
display appears similar to figure 22.
If the automatic print out option is pre-selected, the results will be automatically printed. If not,
press the centre key labelled PRINT to obtain a print out of the results. When the printer is in
operation, the display shows 'PLEASE WAIT PRINTING'.
Note:- At any time during a test sequence, pressing the right hand key labelled STOP will end a test
and return to EQUIPMENTCATEGORY selection display. Similarly during printing the left hand
key labelled STOP can be used to stop the print function and return to the test result display.
The SELF CHECK option enables the following parts of the circuit to be checked:-
NOVRAM (Non Volatile Random Access Memory)
KEYBOARD
DISPLAY CONTRAST
DISPLAY BACKLIGHT
TIME / DATE
PRINTER (Internal and External)
STIR
RISING VOLTAGE
WATCHDOG TIMER
Note:- It is not necessary to have the oil test vessel filled with sample oil for the SELF CHECK tests,
but a vessel with a stirrer is necessary.
1.
From the main menu select the SELF CHECK option. The first display to appear gives a warning
that a NOVRAM test will clear the memory. The option keys take the labels YES; NO and QUIT.
Pressing the QUIT key returns you to the main menu.
C a u t i o n : -
If the YES button is pressed, the NOVRAM memory will be cleared. This will
include the parameters set up for CUSTOM and WITHSTAND tests as well as any
results data. If this information is needed then the YES button must NOT be
pressed.
2.
Pressing the NO key bypasses the NOVRAM test and moves straight to the KEYBOARD test.
Press the left arrow key and then the right hand key. When pressed, each key displays its
number to indicate that it is active.
3.
The DISPLAY CONTRAST test is now presented, and a grid appears on the display. The left and
centre arrow keys can be used to increase or decrease the display contrast. Press SELECT to
move on to the DISPLAY BACKLIGHT test. Use the left and centre arrow keys to turn the light
'On' and 'Off'.
4.
Press the SELECT key and the current TIME and DATE will be displayed and checked. If all is in
order, the message 'TESTPASSED' will be displayed.
5.
Pressing the NEXT key brings into effect a PRINTERS test. The internal printer is checked, and
then the external printer (if fitted). The option to STOP the test is given.
6.
Pressing the NEXT key starts the STIRRING TEST which lasts for one minute, and is
automatically followed by the RISING VOLTAGE test. (Options to RETEST or NEXT are given).
7.
Before the screen automatically returns to the main menu, a WATCHDOG test is performed. The
WATCHDOG TIMER ensures that the microprocessor is constantly running.
SELF CHECK Tests
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