Rae QRAE II, Руководство пользователя

Страница: 13 / 92

QRAE II User Guide
Page 11
3.2
Turning The QRAE II On
To turn the QRAE II on, hold down [MODE] for 2 seconds.
Caution:
The alarm is very loud. During startup, you can mute most of the sound by
holding a finger over the alarm port.
Note: Do not put tape over the alarm port to permanently mute it.
When starting up, the QRAE II simultaneously turns the backlight on and off, beeps
once, blinks once, and vibrates. The screen shows:
On...
RAE Systems Inc.
QRAE II
(Language)
This is followed by a progression of screens that tell you the QRAE II’s current settings:

Firmware version number and serial number ( Note: not shown in fast-startup mode)

List of installed sensors
If the QRAE II is set for Normal Startup, it proceeds to the following steps. However, if
the QRAE II is set for Fast Startup (see page 39 for details), then it skips the following
steps.

Last Calibration date and time

Alarm Mode, battery voltage, shutoff voltage

Datalog Time Left
The QRAE II checks the oxygen sensor to determine whether it needs conditioning. If the
sensor is new or has been in a QRAE II with its battery removed for a long period, it
requires conditioning. If conditioning is required, it can take anywhere from 150 seconds
to several minutes.
Because the oxygen sensor is a biased sensor, the QRAE II checks for abnormal readings
during startup. This is not normally displayed, but if a battery or a sensor is replaced, this
means the sensor loses bias and requires a little time to stabilize its reading again.