Crowcon Gasman User Manual page 16

Operation
seconds. The display will count down from 5, continue to hold the
button until the unit counts down to shut off.
2.2 Run mode
The Gasman unit displays the gas reading on the operator display screen.
A typical display is shown below:
The sensor channel will display the current value of the
gas being monitored and units of measurement, the
'OK' symbol will flash indicating unit is working cor-
rectly. Familiarise yourself with the gas currently being
monitored in your unit. Ensure you understand site
health and safety procedures. For information on Peak
and TWA readings, go to section 2.4.
Confidence signals
To reassure users the unit is working correctly, the Gasman unit will
emit a short beep accompanied by a blue LED flash every 0 seconds
and the OK icon will flash.
2.3 Display symbol guide
Battery
A full battery is represented by a battery icon showing
Full
a full three bars. A low battery charge will show 1 bar.
!
When zero bars are shown the battery icon flashes and the
sounder will emit warning bleeps.
If the battery becomes too low, Gasman will switch off.
TWA alarm
Gasman will display the TWA alarm when the 15 minute or 8 hour time
weighted average alarm threshold is passed for toxic gases.
Gasman will display 'LTWA' and 'STWA'. TWA alarms cannot be cleared.
0
OK
ppm
Gasman
Screen Icons
Warm up
OK
Flashing
icon,
Gasman
running
normally
AL - 1
Alarms
AL - 2
Battery
0.0 Autozero