User's Guide

POLI User’s Guide

4. Turning On or Off

4.1 Turning On

With the instrument turned off, press and hold the [ /↓] Key for 3 seconds, until buzzer

beeps and red LED on, the unit is powered on. It will show informative screens such as:

• Manufacturer’s logo and company name

• Product name, Model No. and Serial No.

• FW version, date, and time

• Battery type, voltage

• Datalog cycle

• Sensor types (High Alarm Limit, Low Alarm Limit, STEL Limit, TWA Limit）

Then the POLI’s main reading screen appears. It usually takes 1 to 2 minutes for sensors

to show meaningful readings. For some sensors not fully warmed up by the time, the

main screen shows ‘- -’ instead of numerical values until the sensor is stablized in a few

more minutes typically. Then it displays instantaneous readings similar to the following

screen (depending on the sensors installed) and is ready for use.

Note: If the battery has insufficient power, the LCD briefly shows the message ‘Battery

Fully Discharged’ and the POLI shuts off automatically. You should charge the battery or

replace it with a fully charged battery before turning it on again.

IMPORTANT!

If a major error that prevents the POLI from functioning occurs during startup, the

message ‘Contact Service’ is shown on the display. The instrument should be shut off

and taken to service.

4.2 Turning Off

In normal reading mode, press and hold the [ /↓] Key, the unit will show 5 seconds

count down, with red LED flash and buzzer beeps once per second. After the last long

flash and beep, LCD displays ‘Power Off’, the unit is powered off.

Caution: The alarm is loud. During startup, you can mute most of the sound by

temporarily holding a finger over the buzzer opening hole. Do not put tape over the

buzzer opening as it permanently mutes and causes a serious safety problem.