TVOC 2 MANUAL
Ion Science Ltd
Page 17 of 32
Unrivalled Gas Detect
ion.
ionscience.com
Diagram 9
Diagram 10
Operation
Selector pins
TVOC 2 has a range of options that are selected via the selector pins on the back of the main PCB (please see the
‘TVOC 2 Set-up’ Section). The options are shown below with the defaults highlighted in bold:
1-1000 ppm
or
0.01 – 10 ppm or 0.1 – 100 ppm
ppm units
or
mg/m
3
units
Calibration mode
TVOC 2 calibration mode can be accessed using the calibration magnet
supplied in the TVOC 2 Accessory Kit (Part number: A-900214).
To enter calibration, place the magnet over the Ion Science logo until the
state changes (i.e. an LED illuminates and/or the display changes).
Ensure the magnet is withdrawn away from the magnetic switch by at least
4 cm once a change has occurred.
Calibration gases
TVOC 2 has three ranges that can be selected however the 0-10ppm range
requires the instrument is calibrated by the user before it can be used. The
0-100ppm and the 0-1000 ppm ranges can initially run using the Factory
calibration carried out during the instruments manufacture, however
because the 0-10 ppm range is more sensitive and more susceptible to
environmental and system tolerances the instrument must be calibrated
before use.
If the 0-10 ppm range is selected TVOC 2 will display the following screen to
indicate that a calibration is required before it can be used.
Follow the calibration instructions before use.
