ENMET EX-5000 User Manual
ENMETENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
Catalytic & MOS
Sensor/Transmitter Installation
Manual
80003-029
MCN-182, 02/11/98
MCN-204, 02/29/00
MCN-230, 02/29/00
MCN-234, 04/25/00
MCN-240, 10/30/00
MCN-247, 11/21/00
MCN-253, 04/05/01
MCN-265, 12/13/01
MCN-290, 11/20/02
Table of Contents
1.0 INTRODUCTION............................................................................................................................................ 1
1.0.1 Unpack............................................................................................................................................................................................1
1.0.2 Check Order...................................................................................................................................................................................1
1.0.3 Serial Numbers..............................................................................................................................................................................1
1.2 Features of Sensor / Transmitter .........................................................................................................................................................2
1.2.1 Magnetic Switches and Potentiometers....................................................................................................................................2
2.0 CATALYTIC COMBUSTIBLE GAS S ENSOR/TRANSMITTER INSTALLATION ...............................................................3
2.1 Installation..............................................................................................................................................................................................3
2.1.1 Mounting........................................................................................................................................................................................3
2.1.2 Wiring.............................................................................................................................................................................................4
2.2 Calibration..............................................................................................................................................................................................4
2.3 Standard Range and Alarm LED ........................................................................................................................................................ 5
3.0 MOS COMBUSTIBLE AND TOXIC VAPOR SENSOR/T RANSMITTER INSTALLATION....................................................6
3.1 Installation..............................................................................................................................................................................................6
3.1.1 Mounting........................................................................................................................................................................................6
3.1.2 Wiring.............................................................................................................................................................................................7
3.2 Initial Calibration .................................................................................................................................................................................. 8
3.3 Purge.......................................................................................................................................................................................................8
3.4 Span Adjustment...................................................................................................................................................................................8
3.5 Calibration..............................................................................................................................................................................................8
4.0 WARRANTY............................................................................................................................................. 9
ADDENDUM: AMMONIA CALIBRATION.................................................................................................................10
List of Illustrations
Figure 1a: Features of Sensor/Transmitter...................................................................................................................................................2
Figure 1: Mounting Dimensions of Catalytic Combustible Gas Sensor/Transmitter...........................................................................3
Figure 2: Terminal Strip Positions for Catalytic Combustible Gas Sensor/Transmitter......................................................................4
Figure 3: Catalytic Combustible Gas Sensor/Transmitter.........................................................................................................................5
Figure 4: Mounting Dimensions of MOS Sensor/Transmitter.................................................................................................................6
Figure 5: Terminal Strip Positions for MOS Sensor/Transmitter............................................................................................................7
Figure 6: Gas cylinder and Typical Calibration Adapter..........................................................................................................................8
Figure 7: Calibration Adapter with Humidifier..........................................................................................................................................8
Reference information:
NOTE: [important information about use of instrument – if not followed may have to redo some steps.]
CAUTION: [affects equipment – if not followed may cause damage to instrument, sensor etc…]
WARNING: [affects personnel safety – if not followed may cause bodily injury or death.]
Catalytic & MOS S/T ENMET Corporation
1.0 Introduction1.0 Introduction
The ENMET catalytic and MOS sensor/transmitters (S/T) are, three or four wire 4-20 ma S/T for the detection of
combustible and toxic gas. They are meant to be used in conjunction with an appropriate power supply and controller.
Each S/T is in an enclosure rated for use in a Class I, Div. 1, Groups B, C, D, classified area.
NOTE: All specifications stated in this manual may change without notice.
1.0.1 Unpack
Unpack the sensor/transmitter (S/T) 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
1.0.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the S/T is received as ordered. Each S/T
is labeled with its target gas. 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.
1.0.3 Serial Numbers
Each S/T is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
1
ENMET Corporation Catalytic S/T
ZERO
Increase Span
Decrease Zero
Decrease Span
Increase Zero
Label: Alarm Point
1.2 Features of Sensor / Transmitter
1.2.1 Magnetic Switches and Potentiometers
Magnetic switches control the span and purge potentiometer; a magnetic field pulse is applied by momentarily putting
the end of the magnet in proximity to the switch and then removing it. Since the magnetic field penetrates the
window, the enclosure cover is not removed in order to perform calibration.
The switch locations are indicated by “+ and –”. “+” increases the value and “–” decreases it. Incremental changes in
span can be obtained by momentarily putting the end of the magnet in proximity to the switch and then removing it; when
the magnet is held in proximity to the switch and not removed, the switch indexes continuously to the end of its range.
See figure 1a, Locations of Typical Indicators and Controls on Display Plate for the locations of the following magnetic switches
+ Span increase For increasing span.
– Span decrease For decreasing span.
P Purge When the purge option is present. For cleaning of a contaminated sensor, the
using Magnet
using Magnet
Label: Range
Locations of Typical Indicators
and Controls on Display Plate Potentiometer Locations
NOTE: Do not adjust these unless calibration
gas is applied to the sensor.
heater voltage is increased up to 20% by activating the purge switch for a short
time. There is an associated yellow LED, indicating when purge is activated.
and Gas
Display
using Magnet
using Magnet
Span
Potentiometer
Alarm
Potentiometer
Heater Potentiometer
CAUTION: This POT is factory set;
resetting may damage sensor
Potentiometer
See figure 1a, Potentiometer Locations for the locations of the following manual potentiometers on the S/T circuit board:
Figure 1a: Features of Sensor/Transmitter
RV0 Zero For zeroing of the display in clean air. Refer to calibration procedure, section 3.2 use this
potentiometer before applying calibration gas.
RV1 Heater For adjusting the heater voltage of MOS sensors. Do not reset this potentiometer unless
advised by ENMET personnel.
RV2 Alarm For setting the point at which the red LED on the S/T face plate is illuminated. Use the
zero potentiometer to set the display at the alarm point value desired, then use this
potentiometer to set the LED to turn on at this point. Then return the display to zero. The
factory default setting is the high alarm set point.
RV3 Span For manually setting the span. Do not reset this potentiometer unless advised by ENMET
personnel.
CAUTION: Area must be declassified before removing cover to access these potentiometers.
2
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