PROGRAMMING & CALIBRATION
3-8
5.
Real Time Clock
– Adjustable date “Feb 07, ‘00” and time
“hh:mm” Included on datalog reports.
6.
Backlight Mode
– Manual or automatic. If manual mode is
chosen, pressing the
[N/-]
key will turn on the LCD
backlight. Automatic mode allows the backlight to turn on
when the ambient light falls below a threshold level preset
in the monitor.
7.
Password
– A 4-digit numeric character which allows the
user to enter the programming mode when needed. The
manufacturer’s default password is “0000.”
8.
Pump Speed
– Low or high. The factory default setting is
low, which reduces the flow rate by 30%, but increases the
battery run time by 10%, and increases the lifetime of the
LEL sensor. High speed offers quicker response time. High
pump speed is preferred for reactive and slowly-responding
gases such as Cl
2
, PH
3
, NH
3
, and HCN.
9.
Averaging Method
– (TWA) Time Weighted Average
(default)
or (AVG), the running average.
10.
Change Display Language
– Select Spanish or English
11.
Temperature Units
– Select Centigrade or Fahrenheit.
12.
Enable/Disable Vibrator
– activate or deactivate the
vibration alarm.
3.6. Change Sensor Configuration
Thus function allows the user to change LEL/VOL Sensor type,
change LEL measurement gas, and enable or disable sensors.
Correction Factors
The LEL sensor used in Q-RAE Plus responds to a broad
range of gases having different sensitivities. A correction factor
can be multiplied by the apparent reading to give the true gas
concentration:
