TVOC MANUAL
Ion Science Ltd
Page 19 of 32
6
Operation
6.5 Calibration mode
TVOC calibration mode can be accessed using the calibration
magnet supplied in the TVOC calibration tool kit (Part number:
A-845214).
To enter calibration place the magnet over the top right of 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Ensure the magnet is withdrawn away from the magnetic switch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 1 cm once a change has occurred.
6.6 Calibration gases
TVOC has three (3) ranges that can be selected however the 0-10ppm range requires the instrument is
calibrated by the user before use. The 0-100ppm and the 0-1000ppm 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 using 10ppm Isobutylene before use.
If the 0-10 ppm range is selected TVOC will display the following
screen to indicate that a calibration is required before it can be used.
Follow the calibration instructions before use.
