3.4.7 Voltage Menu
Main Menu Analyser State Menu Voltage Menu
The voltage applied to the PMT (normally set to 650 volts ±15V for
ambient applications).
Voltage from the sensor proportional to the detected signal from the
reaction cell. This voltage represents the actual measurement of gas.
Displays the detector voltage after PGA scaling.
+12V (primary) power supply. The value should be within ±2V.
-12V (primary) power supply. The value should be within ±2V.
3.4.8 General Settings Menu
Main Menu General Settings Menu
Select the number of decimal places (0-5) used for the concentration
displayed on the home screen.
Sets the concentration units (ppm, ppb, ppt, mg/m3, μg/m3 or ng/m3).
Conversion Factor
[gravimetric units]
This option only appears if concentration units are set to gravimetric
(mg/m3, μg/m3 or ng/m3). Select either 0°C, 20°C or 25°C. This sets the
standard temperature used from conversion for measured volumetric
values.
Select the units that temperature will be displayed in (Celsius,
Fahrenheit or Kelvin).
Select the units that the pressure will be displayed in (torr, PSI, mBar,
ATM or kPa).
Displays the current date and allows users to edit if required.
Displays the current time and allows users to edit if required.
Select the length of time the screen and keypad backlight remain on
after a button press. The setting Always Off means the backlight never
turns on; the setting Always On means the backlight never turns off.
This field allows the user to display concentrations on the Home Screen
in two formats. The first is Inst. only which displays only the
instantaneous concentration reading, the second is Inst & Avg which
displays both instantaneous and average concentration on the Home
Screen. The average is measured over the time period set in
Measurement Settings Menu (refer to Section 3.4.9).
When enabled, the instrument will display the zero character with a
slash (0) to differentiate it from a capital ‘O’.
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