RC Systems 10-0517, Operation Manual, Page: 19 / 51

UM-1096
Revision A 14
Chapter 5 Calibration Procedure
5.1 Preparation
Calibration is the most important function for ensuring correct operation of the SensePoint Series of gas
detectors. The CAL MODE is designed to make calibration quick, easy and error free, and a successful
Zero and Span calibration requires only four keystrokes. The 4-20mA output transmits 3mA during the
calibration, and 4mA during calibration purge to prevent alarms. After 5 minutes of inactivity the gas
detector will exit calibration mode automatically.

RC Systems recommends performing calibrations

Immediately prior to placing a gas detector in service

Any time a new sensor is installed

Every six months for routine calibrations (more often if sensor is known to have been
exposed to gas for extended periods of time)

Periodic bump tests are recommended if detector has potentially been exposed to
incompatible gases to ensure correct operation

Follow these calibration guidelines to ensure proper operation of your RC Systems, Inc. gas
detector:

Calibration accuracy is only as good as the calibration gas accuracy. RC Systems
recommends calibration gases with National Institute of Standards and Technology (NIST)
traceable accuracy to increase the validity of the calibration.

Do not use gas cylinders beyond their expiration date.

Calibrate a new sensor before it is put in use.

Allow the sensor to stabilize before starting calibration.

Calibrate on a regular schedule. RC Systems recommends once every 6 months, depending
on use and sensor exposure to poisons and contaminants.

Calibrate only in a clean atmosphere, free of background gas.