Measurement; Measurement Unit; Measurement Gas - WatchGas NEO User Manual

D e t e c t i o n D e t e c t i o n

7.2 MEASUREMENT

The sub-menus for Measurement are Measurement Unit and Measurement Gas.

7.2.1 MEASUREMENT UNIT

Choose the right measurement unit from the menu.

7.2.2 MEASUREMENT GAS

If you only expect one single gas, it is convenient to let the instrument apply the correction factor for that
gas automatically.
To set measurement gas:
1. Enter the Measurement Gas menu.
2. Select from Gas Library or Custom Gases.
OK
Ent Esc
3. Use and
OK
Ent Esc
Ent Esc
4. Press to select a gas.
5. Press to save and exit.
OK
Ent Esc
Setting a measurement gas is convenient when measuring one single gas, because the value
shown in the display matches the detected concentration for that gas.
Setting a measurement gas does not make the instrument respond exclusively to that gas.
A PID instrument is a broad range detection device that shows a calculated concentration based
Notes
• You can define Custom Gases using WatchGas Suite.
• When setting a measurement gas from Custom Gases, the associated span value(s), correction factor and
default alarm limits are loaded into the instrument.
NEO Photoionization Detector
The example shown in this illustration is a flow chart of the NEO ppb.
to scroll through the list. Hold
Ent
OK
on ionisation of all detectable gases in the air.
Unit
ppm
ppb
mg/m3
µg/m3
µmol/mol
10-6
OK
Ent Esc
or for high speed scrolling.
OK
Esc
Warning
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User Manual
Description
Parts per million
Parts per billion
Milligrams per cubic meter
Micrograms per cubic meter
Micromole per mol
Per million