Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1
32
(ZERO CALIBRATION)
1. If the ambient air is NOT considered reliable to use to set the ZERO, then remove
the weather protection and fit the Gassing Cap accessory (see Section 4.3) onto the
sensor and apply a clean source of zero gas or compressed air.
2. To access the calibration menu, hold the end of the magnet over the switch located
at the top center of the detector display (
) for at least 3 seconds and then remove.
3. The display will indicate the first configuration mode menu ‘SEt CAL’.
4. Put the magnet over the ‘
’ switch again and move to enter the Calibration menu.
5. The display will show the current gas reading, and the ‘ ’ icon flashes.
6. Observe the Zero reading on the XCD RTD display. If it shows a stable reading
around “0” there is no need to carry out Hardware adjustment. Skip the next step.
7. Open the sensor enclosure by unscrewing the sensor cap assembly from the sensor
main body and replace with a Gassing Cap (Part No: 2106D2097) and Flow Housing.
If the output, with no gas applied, is not zero then adjust the zero potentiometer
through the Gassing Cap access holes (see Diagram 15) to obtain a zero indication.
Diagram 15: Sensepoint Toxic Sensor Zero and Span potentiometer
Zero Pot
Span
Zero Pot
Non-Oxygen
Oxygen
Span
A compressed air cylinder (20.9%Vol oxygen) should be used 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. Contact your Honeywell Analytics representative for details of suitable
calibration kits.
To calibrate the detector follow the procedure below.
Note: the Oxygen sensor does not require a zeroing procedure. Background air
(20.9%Vol oxygen) can be used to span the oxygen sensor in place of a compressed
air cylinder (20.9%Vol oxygen). For oxygen sensors only do parts 1-4, 13, 14 (if
compressed air cylinder is used), 15-17 and 22 of the procedure below.
Summary of Contents for Sensepoint XCD RTD
Page 1: ...Technical Manual Sensepoint XCD RTD Remote Toxic Detector Technical Manual ...
Page 56: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 56 17 5 Mounting Bracket Drawing ...
Page 58: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 58 China GB Ex English Version ...
Page 59: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 59 China PA Certification ...
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Page 63: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 63 ATEX for Sensor ...
Page 65: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 65 IEC Ex for Sensor ...
Page 66: ...Sensepoint XCD RTD Technical Manual SPXCDHMRTEN Issue 1 66 18 5 ATEX Name Plate ...