ENMET EX-5150-MOS User Manual
ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
EX-5150-MOS
Sensor/Transmitter
For PPM or %LEL
Manual
Manual Part Number
80003-097
MCN-414, 03/25/09
Table of Contents
1.0 I
NTRODUCTION
1.1 Unpack ............................................................................................................................................................................... 1
1.2 Check Order ....................................................................................................................................................................... 1
1.3 Serial Numbers................................................................................................................................................................... 1
2.0 F
EATURES OF THE
3.0 I
NSTALLATION OF THE
3.1 Mounting the EX-5150-MOS Enclosure ........................................................................................................................... 3
3.2 Wiring the EX-5150-MOS to a Control Unit ..................................................................................................................... 4
4.0 O
PERATION OF THE
4.1 Start up ............................................................................................................................................................................... 6
4.1.1 Typical Start Up .............................................................................................................................................................................. 6
4.1.2 Alternate Start Up ........................................................................................................................................................................... 6
4.1.3 Purge .............................................................................................................................................................................................. 7
4.2 Normal Display Mode ........................................................................................................................................................ 7
4.2.1 Alarm Conditions EX-5150-MOS ................................................................................................................................................. 7
5.0 M
AINTENANCE OF THE
5.1 Maintenance Menu ............................................................................................................................................................. 8
5.2 Calibration of the EX-5150-MOS ...................................................................................................................................... 9
5.2.1 Zero Adjust.................................................................................................................................................................................... 11
5.2.2 Gas Span ....................................................................................................................................................................................... 11
5.2.3 Exit Maintenance Menu ................................................................................................................................................................ 11
5.3 Heater Voltage Settings ................................................................................................................................................... 13
5.4 Sensor Replacement ......................................................................................................................................................... 13
6.0 R
EPLACEMENT PART NUMBERS
7.0 WARRANTY....................................................................................................................................................... 14
A
DDENDUM: AMMONIA CALIBRATION
....................................................................................................................................................... 1
EX-5150-MOS .......................................................................................................................... 2
EX-5150-MOS .................................................................................................................... 3
EX-5150-MOS ........................................................................................................................ 6
EX-5150-MOS .................................................................................................................... 8
............................................................................................................................ 13
.......................................................................................................................... 15
List of Figures and Tables
Figure 1: EX-5150-MOS Features ............................................................................................................................. 2
Figure 2: EX-5150-MOS Mounting Dimensions ......................................................................................................... 3
Figure 3: Terminal Positions EX-5150-MOS Sensor/Transmitter .............................................................................. 5
Table 1: EX-5150-MOS Maintenance Menus Sequence ........................................................................................... 8
Figure 4: Calibration Adapter EX-5150-MOS Sensor/Transmitter ............................................................................. 9
Table 3: Standard and Non-Standard Calibration Gas ............................................................................................ 10
Table 2: Calibration Time ......................................................................................................................................... 11
Figure 5: EX-5150-MOS Maintenance Menu Flow chart ......................................................................................... 12
Reference information:
N
OTE
: [important information about use of instrument – if not followed may have to redo some steps.]
C
W
ARNING
AUTION
: [affects equipment – if not followed may cause damage to instrument, sensor etc…]
:
[affects personnel safety – if not followed may cause bodily injury or death.]
EX-5150-MOS ENMET Corporation
1.0 Introduction
The ENMET EX-5150-MOS sensor/transmitters (S/T) is a 3-wire 24 VDC 4-20mA S/T for the detection of combustible and
toxic gas, utilizing a Metal Oxide Semiconductor (MOS) sensor. The EX-5150-MOS is meant to be used in conjunction with
an appropriate power supply and controller. Each EX-5150-MOS sensor transmitter is in an enclosure rated for use in a Class
I, Div. 1, Groups B, C, D, classified area.
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the EX-5150-MOS 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
N
OTE
: It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor
any claims for damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in
good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
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.
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.
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 EX-5150-MOS is received as ordered. [Each
EX-5150-MOS 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.
1.3 Serial Numbers
Each EX-5150-MOS is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
1
EX-5150-MOS ENMET Corporation
POT 3
See Note
3 Alarm
Power /Fault
M
S
Magnetic switch
Sensor
Sensor ID is stamped
POT 2
Note:
2.0 Features of the EX-5150-MOS
See Figure 1 for location of features:
Feature Description
Display
Gain Potentiometer
(POT)
Visual Alarms
Magnetic Switches
Sensor
LCD: Indicates the level of gas detected by sensor
POT 1: Display contrast adjustment
POT 2: Does Not apply to MOS, not used Do not adjust
POT 3: Does Not apply to MOS, not used Do not adjust
POT 4: MOS Heater Voltage, Do not adjust unless advised by ENMET
LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator LED, Red
M
ENU
: Advances the instrument display through menus (Zero, Span, Exit)
S
ELECT
: Selects the Zero, Span, Exit menu or sets proper calibration values for Zero or Span
For sensing gas at
PPM
or LEL levels, see Table 3 for sensor types
Magnetic switches control the instrument maintenance functions. The switch locations are indicated by M
ENU
and S
magnetic field pulse is applied by momentarily putting the end of the magnet in proximity to the switch and then removing it.
Referred to as tap. Since the magnetic field penetrates the window, the enclosure cover is not removed in order to perform
calibration.
Three alarm points are preprogrammed into the EX-5150-MOS sensor/transmitters. At each alarm point, an LED on the front
panel is activated. These internal alarm settings are independent of the 4-20mA output alarm values that can be set at a
controller. An optional relay board is available that will activate 0.5 Amp relay contacts at each alarm point, plus a fault relay.
POT 1
Indicator
Indicators
Display
Menu Select
POT 4
ENU
Magnetic switch
See Note
ELECT
. A
Internal PCB View
POT 2 and POT 3 are not
used with EX-5150-MOS
Do Not Adjust
on the sensor collar:
For example 1
12
13
32
XX
Figure 1: EX-5150-MOS Features
2
ELECT
External View
EX-5150-MOS ENMET Corporation
Mounting Holes
Sensor/Transmitter
Sensor/Transmitter
Select
Menu
3.0 Installation of the EX-5150-MOS
C
AUTION
C
AUTION
3.1 Mounting the EX-5150-MOS Enclosure
C
AUTION
:
Area must be declassified during installation.
The ENMET EX-5150-MOS gas sensor/transmitter (S/T) is a 3-wire, 24 VDC, 4-20 mA S/T for the detection of toxic or
combustible gas. The S/T is meant to be used in conjunction with an appropriate power supply and controller. The ENMET
EX-5150-MOS sensor transmitter is in an enclosure rated for use in a Class I, Div. 1, Groups B, C, D, classified area.
Appropriate wiring, conduit and fittings are required for proper installation in a explosion proof rated environment.
: Since the sensor/transmitter detects gas only at the sensor location, pay attention to the possible sources of gas, the
density of the gas, locations where the gas may be confined and locations where the gas may damage or injure
property or personnel, when choosing locations of sensor/transmitters.
Also, take into consideration environmental factors when deciding on S/T location. Avoid locations where the S/T
may be damaged by liquid immersion, excessive heat or other know hazards. Also, take precautions to insure
condensation inside of the conduit does not enter the S/T.
Mount the enclosure, using the two mounting holes provided see Figure 2. Pay particular attention to the source and density of
the gas being detected when choosing the location. Mount the S/T near the ceiling for lighter than air gases /vapors and near
the floor for heavier then air gas/vapors. Contact ENMET if you have questions regarding your application.
: Before connecting S/T to controller remove the power source to controller. Failure to do so may cause damage to
sensitive components.
Optional
Conduit fitting
Typically: ½″ NPT female
Sensor
Sensor
7”
REF.
½″ NPT female
2 places, 0.313″
T
OP VIEW
Enclosure Top View
Enclosure Side View
S
IDE VIEW
Figure 2: EX-5150-MOS Mounting Dimensions
3
EX-5150-MOS ENMET Corporation
Optional Relay Output Board
: Auxiliary alarms should be powered from
J4
J8
Wires to
Wires to
2
3.2 Wiring the EX-5150-MOS to a Control Unit
C
AUTION
*Contact ENMET for Modbus
Address information
:
Area must be declassified during installation.
Run conduit and 16
AWG
(1.5
2
MM
) wires to the enclosure from the power supply and controller. If the EX-5150-MOS is
installed in a hazardous location as defined by the National Electrical Code, then ALL wiring must be in accordance with the
National code and any local governing codes.
Open the enclosure, and remove the 2 screws that retain the display overlay to the circuit board.
Use caution when removing the over lay. Do not damage the magnetic switches.
Remove the two overlay standoffs and remove the circuit board, exposing the terminal strips on the bottom of the circuit board.
Do not disconnect the circuit board wiring.
Connect the wires from the controller (power supply) to the supplied J4 plug then attach to J4 terminal.
Connect the wires from the sensor to the supplied J8 plug then attach to the J8 terminal.
See Figure 3 for locations
J4 P
LUG – TERMINAL TO CONTROLLER WIRING
Position Function
1 +
4* RS-485 D+
5* RS-485 D–
24 V
DC
power
2 GND
3 4 - 20 mA out
Controller
Plu g J4
To J4
It is recommended that the auxiliary
alarm be powered separately.
Use 14 – 20
AWG
(2.5 – 0.5
When on power the relays are energized.
Relays are rated at 0.5 Amp continuous.
MM
2
) wire.
5
4
3
2
1
1 2 3
Circuit Board Bottom View
J8 P
LUG – TERMINAL TO SENSOR WIRING
Position Function MOS Sensor
1 + Heater Orange
2 Signal Blue
3 – GND Brown
To J8
Sensor
Plu g J8
Relay Output Board Bottom View
N
OTE
an independent power source separate form
the instrument power to avoid alarm failure
due to controller malfunction.
ALL wiring must be in accordance with the
National code and any local governing
codes.
4
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