Ion-science TVOC Manuel d'utilisateur télécharger pdf (Page 15)

TVOC MANUAL Ion Science Ltd

Page 15 of 32

Unrivalled Detection. www.ionscience.com

Installation – Hazardous location

4-wire Control equipment sensing 4 – 20 mA on return line

Notes:

 For intrinsically safe installations, the enclosure may be opened while the system is live,

provided the work is undertaken by competent personal and suitable safety precautions are

taken. This overrides the warning on the enclosure label.

Initial calibration

TVOC is calibrated at Ion Science before dispatch using 100 ppm Isobutylene. However, if you wish to

calibrate your TVOC after installation, Ion Science recommends that the TVOC is left to run on its chosen

settings (see ‘TVOC Setup Section’) for 24 hours before an initial calibration is carried out, to allow the

instrument to stabilise.

Diagram 8

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Ion-science TVOC Manuel d'utilisateur Page 15