Critical Environment Technologies LPT-M, Руководство по эксплуатации

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© 2020 All rights reserved. Data subject to change without notice. 23
Rev. B | 2020.11 LPT-M - Operation Manual
During calibration, when fl owing span gas on an Ammonia sensor, if the reading climbs higher than
the calibration point after applying gas for 3 minutes, use that reading as the calibration point. It
should be around 300 ppm.
Ozone sensors are reactive to temperature changes and will drift.
Silicone, lead and chlorinated hydrocarbon vapours can poison catalytic sensors.
A bump test will help you determine if a sensor requires calibration. If the sensor still does not
respond as it should after a successful calibration, it probably requires replacing.
5.2 General Safety Warnings
The LPT-M is intended for indoor use, permanently mounted at a height that is appropriate for
the type of gas being monitored. See Section
5.5 Mounting the Transmitter . The LPT-M should be
protected from extreme weather conditions.
The LPT-M requires no assembly and virtually no maintenance other than regular calibration of the
internal and/or remote sensors and ensuring that excess water or dust is not somehow entering
the enclosure and physically damaging the circuit board or internal components. There are no
serviceable elements other than the calibration instructions outlined in this manual. There are no
replaceable components except the sensors.
5.3 Protection Against Electrical Risks
Disconnect all power before servicing. There may be multiple power sources. Power supply may
have a building installed circuit breaker / switch that is suitably located and easy to access when
servicing is required and should be labelled as LPT-M supply (disconnecting power to the LPT-M).
Appropriate markings should be visible at the circuit breaker / switch that is supplying power to
the LPT-M.