ENMET SPECTRUM-RAL-DC - Manual (Page 7)

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1.0 Description and General Information
The SPECTRUM-DC-RAL carbon monoxide monitor is a small battery operated instrument for the
detection of carbon monoxide gas in compressed air lines. An electrochemical cell detects the gas, and
the gas concentration is displayed on an LCD. Audio and visual alarms occur when the gas
concentration exceeds a preset alarm point. At relatively low concentrations of CO, an alarm can be
acknowledged, which results in the temporary cessation of the audio alarm. Operation and maintenance
procedures are managed with two pushbutton switches.
A description of the characteristics and toxic effects of carbon monoxide is given in Appendix A, and
should be reviewed by the user.
1.1 Upon Receipt
1.1.1 Unpack
Unpack the instrument and examine it for shipping damage. If such damage is observed, notify both
ENMET customer service personnel and the commercial carrier involved immediately; save the shipping
box and the packing material.
1.1.2 Turn On
Turn the instrument ON, by pressing and releasing the left pushbutton switch and attach to your
compressed air line system. In uncontaminated air, the display should read 0000 within ten seconds of
turn-on.
1.1.3 Check
Check display operations by pressing the OPTION and SELECT switches as descibed in Figure 2.
The SPECTRUM-DC-RAL instrument is calibrated prior to shipment. However, it is advisable to
apply a known source of carbon monoxide to the instrument to verify the sensor has not been damaged
during shipment.
1.1.4 Expose Sensor
If there is access to a source of CO in compressed air, such as in a calibration kit, expose the sensor to
CO, and observe that the instrument is responsive.
1.1.5 Acknowledge Alarm
If the concentration of CO is greater than 10 ppm, the instrument indicates an alarm condition.
Acknowledge the alarm by pressing and releasing the right hand pushbutton, SELECT; this silences the
audio alarm for four minutes unless the concentration of CO is greater than 50 PPM.
1.1.6 Remove Gas
Remove source of CO. After the display reads zero or close to it, turn the instrument off, by pressing
and holding the left pushbutton switch for 3 seconds.
1.1.7 If Non-response
If the instrument does not operate as described, contact ENMET customer service personnel
immediately.