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Prosense PPS‐RCO Quick Installation Guide
Calibration
It is recommended to periodically carry out calibration to ensure correct operation.
Calibration should be done by a person who trained and certified by local or international
authorities.
Detector should be powered and stabilized for at least 30 minutes before calibration. To
calibrate the detector, use an appropriate span gas cylinder, constant flow regulator and
Prosense Gas Cap. The flow rate used for calibration gas is 0.5 L/Min.
Zero Calibration
It is recommended to use a compressed air cylinder (20.9%Vol oxygen) to perform the zero
calibration if the area where the detector is located contains any residual amount of the
target gas. If no residual gas is present then the background air can be used to perform the
zero calibration. To perform Zero calibration put a jumper to Z pins on detector main board
and press Zero button for 3 seconds. The zero level will be automatically adjusted.
Span Calibration
As there is only relay outputs and RS485 communication ports available on detector it is
necessary to use a control panel to see gas measurement of the detector during the span
calibration. If RS485 communication is not possible calibration should be done in a service
center. To perform Span calibration apply gas to detector via using the Gas Cap while
detector is energised and working. The signal level vary depending on the used gas for
calibration and gas concentration. If the measured level is lower than the calibration gas
level, put a jumper to S+ pin press to Span button till the level reaches the necessarly value.
If the measurement level is higher than the necessary value, put a jumper to S‐ pin and
press to Span button till the level reaches the necessarly value. Once the span calibration
completed remove the jumper and put as a spare on to detector board.
Important: Never put jumper on both S+ and S‐ pins and press any button.
Span (S+ , S‐) and Zero (Z) pins
PRS‐QIG‐PQ‐EN‐Rev.01‐11.2018
Diagram 3: Calibration buttons and pins
Span (S) and Zero (Z) buttons
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