TVOC MANUAL
Ion Science Ltd
Page 20 of 32
7
Calibration
7.1 Calibration routine
Ion Science recommends calibrating TVOC after any maintenance or lamp cleaning is carried out and on a 3
monthly basis to ensure TVOC is working to specification.
NOTE: Please read this entire calibration procedure before attempting a calibration.
TVOC calibration has 4 stages:
1. Setting the ZERO
(Using clean gas via carbon filter)
2. Setting the gas tolerance
(90 – 110 ppm Isobutylene on 0-100 ppm and 0-1000 ppm ranges)
(9 - 11ppm Isobutylene on the 0-10ppm range)
3. Setting the SPAN
(Using the SPAN gas)
GREEN
STATUS LED
ZERO LED
SPAN LED
FAULT LED
