User manual

EXTECHINSTRUMENTS
5CO50‐en‐GB_V1.212/14
MAXIMUMREADING
Press the MODE▼ button, the LCD will show the maximum reading  since the meter was first
powered.Pressagaintoreturntothenormalmeasurementmode.
Toclear the maximumreading:Enter the Maximum mode and, when MAXIconappears,press
andholdtheSETbutton,“Clr”appearsforconfirmation
ofclearcommand.

COALARMSETTING
1. PressandholdtheSETbuttonfor3secondstoenterthesetupmode
2. PressSETagaintoskiptheDatesetting(settheDateifdesiredperearlierinstructions)
3. PressSETagaintoskiptheTimesetting(SettheTimeifdesiredperearlierinstructions)
4. A
 flashing digit will appear. Use the up ▲and down ▼ arrows to increase/decrease the
alarm threshold. Press SEL/RECALL to move to the next
digit.Thereare3digitplaceswithamaximumsettingof
999pm(30ppmisthedefault).
5. Press and hold SET for 3 seconds to save and
 return to
thenormalmeasurementmode.
Whilealarmistripped,theLEDwillflashredeven if “beeper
audiooff”isselected.Tosilencethebeeperwheninanalarm
condition,pressSETandMODEatthesametime.TheredLED
will continue to flash, however, until the environmental
CO
level no longer exceeds the default or user selected Alarm
level.Remembertoreactivatethebeeperforfutureuse.
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