Sencon SI9500, Руководство пользователя, Страница: 13 / 44

If after switching on, the self test routine does not run and no indicators or
displays illuminate then suspect a blown fuse or fault in the mains supply.
Investigations of mains or fuse faults should only be undertaken by
competent trained personnel.
First check that power is available at the mains receptacle, check that the
mains plug is fully and correctly inserted. If the mains plug is a fused type
check that fuse and if necessary replace with a 3A cartridge fuse.
If all of the above are O.K. then check the internal fuse after first removing
the mains plug completely. The internal fuse will be found inside the
instrument case on the printed circuit board adjacent to the mains lead inlet.
Only one fuse is used, which is a 250mA 250V 20mm slow blow cartridge
fuse. The second fuse carrier carries a spare fuse.
If the fuse is O.K. but the unit still will not work, or the fuse repeatedly blows
the gauge should be returned to Sencon for repair.
2.7 MASTER RESET
In the event of a major change, error or fault it may become necessary to
completely reset the instrument. This is always required when the operating
mode is changed.
A reset will erase
all stored settings and readings from the units memory.
To perform a master reset proceed as follows;
A) Switch off power to the unit.
B) Simultaneously hold down the ENTER, CLEAR and
END keys.
C) Switch on the power.
D) After 2 seconds release the keys and the system will be reset.
2.8 SELECTING DISPLAYED DECIMAL PLACES
It is possible to select between one or two decimal places on the displayed
reading. The choice largely depends upon user preference, with two decimal
places greater resolution is possible but on the other hand the readings
appear to be less stable as the displayed resolution is greater than the test
accuracy. This can create a degree of confusion with operators.
The choice is made using internal switch 1 position 1 which selects one
decimal place when open, two decimal places when closed. Refer to
Appendix 1 for instructions on accessing and identifying this switch.