ENMET SPECTRUM-RAL User Manual
ENMETENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
Spectrum RAL
Compressed Air Line
Carbon Monoxide Monitor
Instrument Manual
80002-033
07/10/96
MCN #189, 04/03/98
MCN #204, 10/20/98
MCN #218, 06/15/99
MCN #246, 12/28/00
MCN #258, 07/18/01
MCN #268, 11/05/01
Table of Contents
1.0 INTRODUCTION................................................................................................................................1
1.1 Unpack ................................................................................................................................................................................1
1.2 Check Order.......................................................................................................................................................................1
1.3 Serial Numbers .................................................................................................................................................................. 1
1.4 Check Instrument..............................................................................................................................................................2
2.0 SPECTRUM-RAL FEATURES AND INSTALLATION...............................................................................2
2.1 Features...............................................................................................................................................................................2
2.2 SPECTRUM-RAL Installation.......................................................................................................................................4
2.2.1 Mount Enclosure....................................................................................................................................................4
2.2.2 Air Supply...............................................................................................................................................................4
2.2.3 Relay Contacts.......................................................................................................................................................4
3.0 SPECTRUM-RAL OPERATION.........................................................................................................5
3.1 Operational Menu..............................................................................................................................................................5
3.2 Gas Concentration Display and Alarms ........................................................................................................................6
3.3 Alarm Acknowledge.........................................................................................................................................................6
3.4 Data......................................................................................................................................................................................6
3.5 Interference Gases ............................................................................................................................................................. 7
4.0 MAINTENANCE................................................................................................................................8
4.1 Maintenance Menu...........................................................................................................................................................8
4.2 Key.......................................................................................................................................................................................9
4.3 Zero......................................................................................................................................................................................9
4.4 Calibration ..........................................................................................................................................................................9
4.5 Changing the Alarm Level.............................................................................................................................................10
4.6 Setting a New Key..........................................................................................................................................................10
4.7 Changing Components ................................................................................................................................................... 10
5.0 REPLACEMENT PART NUMBERS ...................................................................................................... 11
6.0 WARRANTY............................................................................................................................... 12
APPENDIX A....................................................................................................................................... 13
The Characteristics and Effects of Carbon Monoxide.....................................................................................................13
List of Illustrations
FIGURE 1: SPECTRUM-RAL F EATURES ................................................................................................3
FIGURE 2: SPECTRUM-RAL INTERIOR VIEW ..........................................................................................4
TABLE 1: RELAY CONNECTIONS TO TERMINAL STRIP..................................................................................4
FIGURE 3: OPERATION M ENU DIAGRAM ...................................................................................................5
TABLE 2: KNOWN INTERFERENCE GASES .................................................................................................7
TABLE 3: KNOWN GASES WITH NO RESPONSE...........................................................................................7
FIGURE 4: MAINTENANCE M ENU DIAGRAM ...............................................................................................8
FIGURE 5: REMOVE SHORTING CLIP......................................................................................................10
FIGURE 6: % COHB VS TIME................................................................................................................ 13
SPECTRUM RAL ENMET Corporation
1.0 Introduction1.0 Introduction
The SPECTRUM-RAL carbon monoxide monitor is a small 110 VAC 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.
NOTE: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the SPECTRUM-RAL and examine it for shipping damage. If such damage is observed, notify both
ENMET customer service personnel and the commercial carrier involved immediately.
Regarding Damaged Shipments
NOTE: It is your responsibility to follow these instructions. If they are not followed, the carrier will
not honor any claims for damage.
q This shipment was carefully inspected, verified and properly packaged at our company and delivered to the
carrier in good condition.
q When it was picked up by the carrier at ENMET, it legally became your company’s property.
q If your shipment arrives damaged:
• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local
office and request immediate inspection of the carton and the contents.
• After the inspection and after you have received written acknowledgment of the damage from the carrier,
contact ENMET Customer Service for return authorization and further instructions. Have your Purchase
Order and Sales Order numbers available.
q ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability
coverage, usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
q The shipping company may offer optional insurance coverage. ENMET only insures shipments with the
shipping company when asked to do so in writing by our customer. If you need your shipments insured, please
forward a written request to ENMET Customer Service.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days
of receipt at the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the SPECTRUM-RAL is received as
ordered. If there are accessories on the order, ascertain that they are present. Check the contents of calibration kits.
Notify ENMET customer service personnel of any discrepancy immediately.
1.3 Serial Numbers
Each SPECTRUM-RAL is serialized. These numbers are on tags on the equipment and are on record in an ENMET
database.
1
ENMET Corporation SPECTRUM RAL
1.4 Check Instrument
Turn the instrument ON, by plugging into a standard 110 VAC wall outlet and attach to your compressed air line
system. In uncontaminated air, the display should read 0000 within ten seconds of turn-on.
Check display operations by pressing the OPTION and SELECT switches as described in Figure 1.
The SPECTRUM-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.
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.
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.
Remove source of CO. After the display reads zero or close to it, turn the instrument off, by removing the power
adapter from the wall outlet.
If the instrument does not operate as described, contact ENMET customer service personnel immediately.
2.0 2.0 SPECTRUM-RAL Features and Installation Features and Installation
2.1 Features
The features of the SPECTRUM-RAL Carbon Monoxide monitor are shown in Figure 1. These are:
DISPLAY LCD indicates the gas concentration, or prompts for the operational and
maintenance menus
PUSHBUTTON
SWITCHES
These switches are used to access and utilize the operational and maintenance menus.
There are two of these, as follows:
OPTION, the left hand switch.
SELECT, the right hand switch.
SENSOR HOUSING A small cylindrical turret on the display surface; the membrane of the
electrochemical sensor is exposed to the compressed air through the air supply line.
REGULATOR A pressure regulator with a gauge.
FLOWMETER Flowmeter with an adjustable valve, connected by tubing to the sensor housing.
VISUAL ALARM A red LED, which is ON whenever, the CO concentration is above the alarm point.
AUDIO ALARM A small horn, which is ON whenever, the gas concentration is above the alarm
point, until the alarm is acknowledged.
COVER Retained with four screws and removed to change the sensor and access the
terminal strip.
RELAY CONTACT
TERMINAL STRIP
A terminal strip inside the enclosure that enables access to the alarm relay contacts.
See Figure 2.
2
SPECTRUM RAL ENMET Corporation
Valve
O
Enclosure Cover
Sensor Housing
Pushbutton
Switches
Fitting
Enclosure Body
(Sensor)
PTIONSELECT
Cover Screws
(Tubing from Flowmeter)
4 places
Visual Alarm
Power Cord
Ref: Fitting to Air line
Tubing to Monitor
Pressure Control Knob
Regulator
Gauge
Display
Audio Alarm
Exterior View
Flowmeter
Flowmeter
Regulator with Flow meter
Figure 1: SPECTRUM-RAL Features
3
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