Test Products International 775 - Manual (Page 9)

8
NOTE-Should an error occur at any point of the set up procedure
please refer to the trouble shooting guide for assistance.
Operating Instructions
General
The backlight can be toggled on and off by pressing the N/
▼/
backlight button.
Although the instrument performs an automatic zero during the
start up procedure a manual zero can be performed by pressing and
holding down the Y/
▲/ZERO button until the following screen is
displayed:-
NOTE-Manual Re-Zero should only be performed in a clean air
environment.
To turn the instrument OFF press and hold down the ON/MENU but-
ton till the instrument beeps.
9
Combustible Gas Leak Detection
LCD & LED Indication Mode
The presence of Combustible Gas will be shown as follows:-
An audible tone can be heard by turning the thumb wheel until it
clicks to the on position.
Amount of LCD Level
Indicator
LEDs Lit
Gas Present Indicator Green Red
<100ppm 0 None None
>100ppm <500ppm 1 1 None
>500ppm <1000ppm 2 1+2 None
>1000ppm <1500ppm 3 1,2+3 None
>1500ppm <2000ppm 4 1,2,3+4 None
>2000ppm <2500ppm 5 2,3+4 1
>2500ppm <3000ppm 6 3+4 1+2
>3000ppm <4500ppm 7 4 1,2+3
>4500ppm 8 None 1,2,3+4
8
NOTE-Should an error occur at any point of the set up procedure
please refer to the trouble shooting guide for assistance.
Operating Instructions
General
The backlight can be toggled on and off by pressing the N/
▼/
backlight button.
Although the instrument performs an automatic zero during the
start up procedure a manual zero can be performed by pressing and
holding down the Y/
▲/ZERO button until the following screen is
displayed:-
NOTE-Manual Re-Zero should only be performed in a clean air
environment.
To turn the instrument OFF press and hold down the ON/MENU but-
ton till the instrument beeps.
9
Combustible Gas Leak Detection
LCD & LED Indication Mode
The presence of Combustible Gas will be shown as follows:-
An audible tone can be heard by turning the thumb wheel until it
clicks to the on position.
Amount of LCD Level
Indicator
LEDs Lit
Gas Present Indicator Green Red
<100ppm 0 None None
>100ppm <500ppm 1 1 None
>500ppm <1000ppm 2 1+2 None
>1000ppm <1500ppm 3 1,2+3 None
>1500ppm <2000ppm 4 1,2,3+4 None
>2000ppm <2500ppm 5 2,3+4 1
>2500ppm <3000ppm 6 3+4 1+2
>3000ppm <4500ppm 7 4 1,2+3
>4500ppm 8 None 1,2,3+4