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OPERATION
D141-32-880 Issue A
Table 3 - Using the GasCheck G3 functions
Image
Function
Contrast adjusts the contrast of the GasCheck G3 LCD display. Significant variations in
ambient temperature conditions may cause the display to appear too dark or feint.
When selected a number appears indicating the contrast as a percentage; use the
and keys to adjust the display contrast to the desired level. Press the key
to exit to the main menu.
Backlight selects whether the backlight is on or off. In daylight the user may not be
able to determine if the backlight is on or off therefore a symbol on the main running
screen shows the status. Use the or key to move the 'tick' to the desired
position and then press the key to return to the Main Menu.
Note:
The backlight significantly reduces battery life.
Sound switches the audible indication of the leak rate on and off. The frequency of
the signal increases as detected gas levels increase. Use the or key to move
the 'tick' to the desired position and then press the key to return to the Main
Menu.
Note:
An audible 'beep' can also be heard when ever the key pad is pressed, this beep
cannot be switched off.
Peak hold can be used to record the highest detected reading on the display until the
key is pressed. Use the or key to move the 'tick' to the desired position and
then press the key to return to the Main Menu. When using the GasCheck G3 in
peak hold mode, press the key to clear the held reading. The reading held on
screen will be logged when the key is pressed.
Calibration can be used to switch between the factory calibration setting and user
defined calibration parameters. Factory calibration cannot be adjusted. User defined
calibration is described in
Battery selection can be used to select whether the batteries fitted are Alkaline (non-
rechargable) or Nickel Metal Hydride (rechargeable). Select the battery type using the
or key to move the 'tick' to the desired position and then press the key to
return to the Main Menu.
Note:
Failing to select the correct battery type will not damage the instrument or
affect it's ability to detect gas, however it will cause the battery indicator to
read incorrectly.
View data allows 10 readings to be logged in internal memory and recalled later. To
store a reading press the key while on the main running screen. When readings
are stored in memory a symbol will appear on the Main running screen. When the
memory is full the ' ' symbol will flash. The stored data can be viewed by scrolling
through the logged readings using the and keys. To delete the stored data
press and hold the key, the ' ' symbol will flash, continue holding the key
until the data is deleted. Press the key to exit to the Main menu.
Units selects the leak rate units displayed on the LCD screen. Select the required units
using the or key to move the 'tick' to the desired position and then press the
key to return to the Main Menu. The following units are available:
cc/sec= Cubic Centimetres per second (volumetric leak rate)
ppm= Parts per million, (concentration)
mg/m3 = Milligrams per metre cubed (concentration)
g/yr= Grams per year (an alternative volumetric leak rate)
