P 1, 2, 3 & 5000 Ex Ion Science Ltd
Page 10 of 52
Instrument Functions
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Keypad function descriptions
On/Off.
To switch the P instrument 'ON' - Press the 'ON/OFF' key.
To switch the P instrument 'OFF' - Ensure you are on the ‘Display/Function
Selection screen’ or a Display screen. Press and hold the 'ON/OFF' key. A 'Timer' symbol
will appear and a line will travel across the bottom on the screen, release the 'ON/OFF'
button once the line has travelled the length of the screen. The ‘Delay’ symbol will briefly
appear before the instrument turns ‘OFF’ completely. This procedure has been designed
to avoid accidental switch OFF.
ENTER
This key selects options and confirms settings.
ESCAPE
This key is used to return the display to the previous screen and to abort an adjustment.
Repeated pressing of this key will return the display to the 'Display/Function Selection
screen'.
UP
Use to scroll up or changes selection
DOWN
Use to scroll down or changes selection
ZERO
Pressing the Zero key Zeros -out background readings. See the 'Instrument
Displays' section of this manual for more detail (Page 15)
Delay
Symbol