© 2021 All rights reserved. Data subject to change without notice.
31
Rev. E | 2021.03
LPT - Operation Manual
8.1.4 Calibration Frequency
•
Parking garage detectors: Once every 12 months
•
OHS applications: Once every 6 months (OHS: Occupational Health & Safety)
•
For best performance and to meet published specifi cations: once every six months
NOTE:
A calibration label should be applied after every calibration to confi rm work performed and
the date it was confi rmed. If a controller is involved, the alarm set points should be indicated on a
label on the front door of the enclosure so anyone working in the environment can be aware.
Equipment: Calibration Kit, calibration gases, digital multi-meter
Users can order the Calibration Kit, calibration accessories and / or gases from any CETCI authorized
distributor or you can supply your own gas and equipment as long as the gas meets the minimum
specifi cations.
NOTE:
CETCI does not ship gas cylinders outside of Canada.
8.1.5 Gas Testing Frequency (Bump Testing)
For the purpose of safety in OHS applications, sensors should be gas tested (bump tested) once
every month to confi rm response and alarm activation.
8.1.6 Sticky Gases
Sticky gases, like Chlorine (Cl
2
) adhere to surfaces including tubing and splash guards. When
calibrating a sticky gas sensor we suggest using Tefl on lined tubing so the gas doesn’t adhere to the
tubing, reducing the concentration of the fl ow of gas. Also keep the length of the tubing as short
as possible, no more than 0.91 to 1.22 m / 3 - 4 ft so the gas fl ow concentration doesn’t lessen
over the distance from the gas cylinder to the sensor. If a splash guard is required for an LPT Low
Power Transmitter with a Chlorine sensor, the special sticky gas splash guard (Option -SN) must be
ordered.
