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8-3

PURGE MODEUSER HANDBOOK

8.5 DESCRIPTION OF PURGE BUTTON OPERATION

8.5.1 Lights

To switch ON the backlight:

• Press and hold the Centre button .

To switch ON the ashlight:

• Press and hold the Centre button again.

The backlight and ashlight are both timed to switch OFF after two

minutes. Both can be switched OFF by a third press and hold the

Centre button .

8.5.2 Pump

To switch the pump ON and OFF:

• Press the RH button .

8.5.3 Manual Zero

To zero the reading (in fresh air):

• Press and hold ZERO .

Note: Pump must be switched ON to zero reading.

8.5.4 Menu / Off

To re-select the Mode Menu:

• Press and hold both the LH button and RH button

When the menu appears on the screen, release the buttons,

otherwise the instrument will proceed into the switch OFF

process and will switch OFF after a further three (3) seconds.

Other manuals for GMI GT series

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