Rae QRAE 3 User Manual - page 15
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6. Turning The QRAE 3 On And Off
6.1. Turning The QRAE 3 On
With the instrument turned off, press and hold the [MODE] key until the audible alarm stops, and then
release.
When starting up, the QRAE 3 turns the backlight on and off, beeps once, blinks once, and
vibrates once. A RAE Systems logo should appear first. During a normal startup, this is followed
by a progression of screens that tell you the QRAE 3’s current settings:
Product name and model number, air flow type, and serial number
Application firmware version, build date, and build time
Installed sensors (including production/expiration/calibration date and alarm limit settings)
Current date, time, and temperature
User mode and operation mode
Battery type, voltage, shutoff voltage
Alarm mode and alarm settings
Datalog period (if it is activated) and interval
Policy Enforcement settings
Then the QRAE 3’s main reading screen appears. It takes 1 to 2 minutes for sensors to show a reading, so if
any have not warmed up by the time the main screen is shown, you will see “- -” instead of a numerical
value until the sensor provides data (typically less than 2 minutes). Then it displays instantaneous readings
similar to the following screen (depending on the sensors installed) and is ready for use.
Note:
If the battery is completely empty, then the display briefly shows the message “Battery Fully
Discharged,” and the QRAE 3 shuts off. 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 QRAE 3 from functioning is found during startup, the message “Please
Contact Service Department” is shown on the display. The instrument should be shut off and serviced.
6.2. Turning The QRAE 3 Off
Press and hold [MODE]. A 5-second countdown to shutoff begins. You must hold your finger on
the key for the entire shutoff process until the QRAE 3 is powered off.
Caution:
The alarm is very loud. During startup, you can mute most of the sound by holding a
finger over the alarm port. Do not put tape over the alarm port to permanently mute it.