ENMET EX-5185 User Manual
ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
www.enmet.com
EX-5185-PID
Toxic Gas
Sensor/Transmitter
Manual
Manual Part Number
80003-091
MCN-13-006, 10/24/13
EX-5185-PID ENMET Corporation
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-5185 Enclosure ..................................................................................................................................... 3
3.2 Wiring the EX-5185 to a Control Unit ............................................................................................................................... 4
4.0 O
PERATION OF THE
4.1 Start up ............................................................................................................................................................................... 6
4.1.1 Typical Start Up .............................................................................................................................................................................. 6
4.2 Normal Display Mode ........................................................................................................................................................ 7
4.2.1 Alarm Conditions EX-5185............................................................................................................................................................ 7
5.0 M
AINTENANCE OF THE
5.1 Maintenance Menu ............................................................................................................................................................. 8
5.2 Calibration of the EX-5185 ................................................................................................................................................ 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
....................................................................................................................................................... 1
EX-5185 ................................................................................................................................... 2
EX-5185 .............................................................................................................................. 3
EX-5185.................................................................................................................................. 6
EX-5185 ............................................................................................................................. 8
............................................................................................................................ 14
List of Figures and Tables
Figure 1: EX-5185 Features ....................................................................................................................................... 2
Figure 2: EX-5185 Mounting Dimensions .................................................................................................................. 3
Figure 3: Terminal Positions EX-5185 Sensor/Transmitter ....................................................................................... 5
Table 1: EX-5185 maintenance Menus Sequence .................................................................................................... 8
Figure 4: Calibration Adapter EX-5185 Sensor/Transmitter ...................................................................................... 9
Table 3: Examples of Standard Calibration Gas ...................................................................................................... 10
Figure 5: EX-5185 Maintenance Menu Flow chart................................................................................................... 13
Figure 6: Sensor Replacement ................................................................................................................................ 13
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-5185-PID ENMET Corporation
1.0 Introduction
The ENMET EX-5185 sensor/transmitters (S/T) is a 3-wire, 24 VDC 4-20mA S/T for the detection of toxic gas, utilizing a
Photoionization detector (PID) sensor. The EX-5185 is meant to be used in conjunction with an appropriate power supply and
controller. The ENMET EX-5185 sensor/transmitter has been designed and approved to be used in a Class I, Div. 1, Groups
B, C, D, classified areas. The approval was issued by CSA International.
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the EX-5185 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-5185 is received as ordered. [Each EX5185 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-5185 is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
1
EX-5185-PID ENMET Corporation
3 Alarm
Power /Fault
M
S
Magnetic switch
POT 3
POT 4
POT 2
Note:
2.0 Features of the EX-5185
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 PID, not used Do not adjust
POT 3: Does Not apply to PID, not used Do not adjust
POT 4: Does Not apply to PID, not used Do not adjust
LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator Red LED, user adjustable
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
POT 1
Magnetic switches control the instrument maintenance functions. The switch locations are indicated by M
ENU
and S
ELECT
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-5185 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.
Indicators
See Note
See Note
See Note
Indicator
Display
ENU
Magnetic switch
Menu
Select
Internal PCB View
Sensor
POT 2, POT 3 and POT 4 are
ELECT
not used with EX-5185 PID
Do Not Adjust
. A
External View
Figure 1: EX-5185 Features
2
EX-5185-PID ENMET Corporation
Mounting Holes
Sensor/Transmitter
Sensor/Transmitter
3.0 Installation of the EX-5185
C
AUTION
C
AUTION
3.1 Mounting the EX-5185 Enclosure
C
AUTION
:
Area must be declassified during installation.
The ENMET EX-5185 gas sensor/transmitter (S/T) is a 3-wire, 24 VDC, 4-20 mA S/T for the detection of toxic gas. The S/T is
meant to be used in conjunction with an appropriate power supply and controller. The ENMET EX-5185 sensor/transmitter
has been designed and approved to be used in a Class I, Div. 1, Groups B, C, D, classified areas. The approval was issued by
CSA International. 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
½″ NPT female
2 places, 0.313″
Me
Sel
Enclosure Top View
Enclosure Side View
Sensor
Figure 2: EX-5185 Mounting Dimensions
3
EX-5185-PID ENMET Corporation
J4
J8
Wires to
3.2 Wiring the EX-5185 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-5185 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
To J4
Plu g J4
Controller
5
4
3
2
1
1 2 3
Circuit Board Bottom View
4
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