ENMET EX-5150 MOS Manuel utilisateur

ENMET

680 Fairfield Court

Ann Arbor, MI 48108

734.761.1270 Fax 734.761.3220

www.enmet.com

EX-5150 MOS

Sensor Transmitter

For PPM or %LEL

Operation and Maintenance Manual

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 1

Manual Part No. – 80003-097

Table of Contents

1.0 INTRODUCTION....................................................................................................................................................................2

1.1 Unpack.............................................................................................................................................................................................2

1.2 Check Order.....................................................................................................................................................................................2

1.3 Serial Numbers.................................................................................................................................................................................2

2.0 FEATURES OF THE EX-5150-MOS........................................................................................................................................3

3.0 INSTALLATION OF THE EX-5150-MOS .................................................................................................................................4

3.1 Mounting the EX-5150-MOS Enclosure .........................................................................................................................................4

3.2 Wiring the EX-5150-MOS to a Control Unit...................................................................................................................................5

4.0 OPERATION OF THE EX-5150-MOS......................................................................................................................................7

4.1 Start up.............................................................................................................................................................................................7

4.1.1 Typical Start Up..............................................................................................................................................................................................7

4.1.2 Alternate Start Up...........................................................................................................................................................................................7

4.1.3 Purge ..............................................................................................................................................................................................................8

4.2 Normal Display Mode......................................................................................................................................................................8

4.2.1 Alarm Conditions EX-5150-MOS ...................................................................................................................................................................8

5.0 MAINTENANCE OF THE EX-5150-MOS.................................................................................................................................9

5.1 Maintenance Menu...........................................................................................................................................................................9

5.2 Calibration of the EX-5150-MOS..................................................................................................................................................10

5.2.1 Zero Adjust.................................................................................................................................................................................................... 12

5.2.2 Gas Span.....................................................................................................................................................................................12

5.2.3 Exit Maintenance Menu................................................................................................................................................................................ 12

5.3 Heater Voltage Settings .................................................................................................................................................................14

5.4 Sensor Replacement.......................................................................................................................................................................14

6.0 REPLACEMENT PART NUMBERS .........................................................................................................................................14

7.0 TERMS AND CONDITIONS ...................................................................................................................................................16

7.1 Ordering Information.....................................................................................................................................................................16

7.2 Delivery .........................................................................................................................................................................................16

7.3 Payment Terms ..............................................................................................................................................................................16

7.4 Warranty Information and Guidelines ...........................................................................................................................................16

7.5 Return Policy .................................................................................................................................................................................16

8.0 INSTRUCTIONS FOR RETURNING AN INSTRUMENT FOR SERVICE...........................................................................................17

List of Figures

Figure 1: EX-5150-MOS Features.............................................................................................................................................................3

Figure 2: EX-5150-MOS Mounting Dimensions.......................................................................................................................................4

Figure 3: Terminal Positions EX-5150-MOS Sensor/Transmitter.............................................................................................................6

Figure 4: Calibration Adapter EX-5150-MOS Sensor/Transmitter .........................................................................................................10

Figure 5: EX-5150-MOS Maintenance Menu Flow Chart.......................................................................................................................13

List of Tables

Table 1: EX-5150-MOS Maintenance Menus Sequence...........................................................................................................................9

Table 2: Standard and Non-Standard Calibration Gas.............................................................................................................................11

Reference Information:

NOTE:[important information about use of instrument]

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.]

Attention / Warning

Earth Ground

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 2

Manual Part No. – 80003-097

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.

NOTE: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

NOTE: 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 ENMET 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:

oKeep 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.

oAfter 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. Please 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

680 Fairfield Court

Ann Arbor, MI 48108

734-761-1270 Fax 734-761-3220

Toll Free: 800-521-2978

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.

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 3

Manual Part No. – 80003-097

2.0 Features of the EX-5150-MOS

See Figure 1 for location of features:

Feature

Description

Display

LCD: Indicates the level of gas detected by sensor

Gain Potentiometer

(POT)

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

Visual Alarms

LED indicators:

Power / Fault Indicator LED, Green / Red

Alarm (3) Indicator LED, Red

Magnetic Switches

ENU

: Advances the instrument display through menus (Zero, Span, Exit)

SELECT: Selects the Zero, Span, exit menu or sets proper calibration values for Zero or Span

Sensor

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 MENU and SELECT. A

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 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.

Figure 1: EX-5150-MOS Features

POT 3

See Note

3 Alarm

Indicators

Power /Fault

Indicator

Display

ENU

Magnetic switch

ELECT

Magnetic switch

Sensor

Sensor ID is stamped on

the sensor collar:

For example, 1

Select

External View

POT 4

POT 2

See Note

POT 1

Internal PCB View

NOTE: POT 2 and POT 3 are not used

with EX-5150-MOS

Do Not Adjust

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 4

Manual Part No. – 80003-097

3.0 Installation of the EX-5150-MOS

CAUTION: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.

CAUTION: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.

3.1 Mounting the EX-5150-MOS Enclosure

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.

CAUTION:Before connecting S/T to controller remove the power source to controller. Failure to do so may cause damage to

sensitive components.

Figure 2: EX-5150-MOS Mounting Dimensions

Optional

Conduit fitting

Typically: ½″NPT female

Mounting Holes

2 places, 0.313

″

TOP VIEW

Sensor

Sensor/Transmitter

Enclosure Top View

Sensor/Transmitter

Enclosure Side View

Sensor

SIDE VIEW

Select

½″NPT female

7”

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 5

Manual Part No. – 80003-097

3.2 Wiring the EX-5150-MOS to a Control Unit

CAUTION:Area must be declassified during installation.

Run conduit and 16 AWG (1.5MM2) 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 PLUG –TERMINAL TO CONTROLLER WIRING

Position

Function

1 +

24 V

power

GND

4 - 20 mA out

RS-485 D+

RS-485 D–

*Contact ENMET for Modbus

Address information

J8 PLUG –TERMINAL TO SENSOR WIRING

Position

Function

MOS Sensor

1 +

Heater

Orange

Signal

Blue

3 –

GND

Brown

Relay Output Board Bottom View

Optional Relay Output Board

It is recommended that the auxiliary

alarm be powered separately.

Use 14 – 20 AWG (2.5 –0.5 MM2) wire.

When on power the relays are energized.

Relays are rated at 0.5 Amp continuous.

OTE

:Auxiliary alarms should be powered

from an independent power source separate

from 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.

Circuit Board Bottom View

1 2 3

Plug J4

To J4

Wires to

Controller

Plug J8

To J8

Wires to

Sensor

EX-5150

ENMET

Manual Revision Date – June 14, 2017

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Manual Part No. – 80003-097

Figure 3: Terminal Positions EX-5150-MOS Sensor/Transmitter

When wiring is complete re-assemble the EX-5150-MOS. Use caution when installing the overlay so as not to damage the

magnetic switches. Put the cover back on the S/T Do Not apply power to the S/T without the cover in place.

Sensor/Transmitter

Enclosure Cutaway View

Printed Circuit Board

(PCB)

Display Overlay

Display Overlay Screws

(2 places)

Display Overlay Standoffs

(2 places)

Magnetic

Switches

(2 places)

Magnetic Switches

(2 places)

Printed Circuit Board (PCB)

J4 and J8 Terminals are located on the

bottom side of PCB

Display Overlay

Display

Optional

Relay Output Circuit Board

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 7

Manual Part No. – 80003-097

4.0 Operation of the EX-5150-MOS

It is best to have the EX-5150-MOS transmitters powered up and operational for 24 hours before applying calibration or test gas to

them.

When the EX-5150-MOS transmitter is first powered up, it goes through a series of momentary screens, which identify the instrument

model number, serial number and software revision. After all the momentary screens have been displayed, the instrument arrives at

the Main Gas Display showing the gas concentration and unit of measurement.

Depending on transmitter configuration and calibration condition, the furthest right character in the display may flash a letter

indicating the instrument status. See the Section 4.1.2 below.

4.1 Start up

4.1.1 Typical Start Up

When power is supplied to the EX-5150-MOS, the S/T will display the following sequence of information:

NOTE:Software revision may cause variations of display output.

Example of Display

Function

The instrument: Model EX-5150-MOS

Note MOS is not displayed

The instrument: Serial Number

The instrument: Software Revision

IF the right most character is a flashing W

The instrument is in Warm-up mode

This should last about 1 minute

The Signal Output is held at 4mA during warm-up

For Toxic Gas OR

The instrument: Normal Display Mode

Measurement of target Gas

IF the right most character is a flashing C, F, P or R See Section 4.1.2

4.1.2 Alternate Start Up

Depending on EX-5150-MOS S/T configuration and calibration condition, the furthest right character in the display may flash

a letter indicating the instrument status. See the table below.

Purging occurs automatically for instruments with sensors that require purging. Purge will occur for 5 minutes on instrument

start-up, followed by a 5-minute recovery period. At the end of the recovery period, the transmitter should be ready for

operation. If additional purge time is required, refer to Section 4.1.3 for more information.

Example of Display (may also display 0 LEC)

Function

IF the right most

character is a flashing C

The last calibration of the instrument was invalid

The instrument must be recalibrated

IF the right most

character is a flashing F

There is a sensor fault

IF the right most

character is a flashing P

The sensor is being purged:

This function is required for certain sensor types

The duration of purge cycle varies with sensor type

The Signal Output is held at 4mA during purge

IF the right most

character is a flashing R

The instrument is in Recovery mode after completing the

purge cycle

This should take about 5 minutes

EX-5150

73-1256

S/W X.X

0ppm

0ppmW

0ppmC

0ppmF

0ppmP

0ppmR

0 LEW

0 LEL

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 8

Manual Part No. – 80003-097

4.1.3 Purge

Purging is a function that temporarily increases the sensor heater voltage to clean off contaminants. Some sensors operate at

higher heater voltages where purging is not required. The EX-5150-MOS S/T is configured at the factory for the installed

sensor purging requirements.

Purge times vary form 5 – 25 minutes depending on the sensor installed.

Some sensors require additional purge time after start up. Particularly if the sensor is new or the system powered down for an

extended period.

To initiate a purge: Turn the power off and back on. This will initialize a purge cycle.

See Figure 5 for the Operational portion of the Maintenance Menu Flow Chart.

4.2 Normal Display Mode

When the EX-5150-MOS is installed as described in section 3, and in clean air, the POWER green LED is on, the display is lit and

the information on the display is measurement of the target gas detected by the EX-5150-MOS.The red alarm and fault LEDs are

not lit.

To advance through displays of operational information tap the magnet over the MENU button.

NOTE:Software revision may cause variations of display output.

See sequence of operational information below:

Display Measurement of the target gas

Tap the magnet over the MENU button

Display indicates Alarm 1 Set point

Tap the magnet over the MENU button

Display indicates Alarm 2 Set point

Tap the magnet over the MENU button

No Function for the

SELECT button

in this mode

Display indicates Alarm 3 Set point

Tap the magnet over the MENU button

Display indicates mA Span range

(Full Scale)

Tap the magnet over the MENU button

Display returns to gas measurement

Operational Display Flow Chart

4.2.1 Alarm Conditions EX-5150-MOS

There are three alarm set points available. The alarm set points can be changed within limits; see the maintenance section of

this manual for the procedure.

If the gas concentration increases above that of the alarm set point, the associated red LED is lit.

0LEL

A1: 10

ELECT

ENU

A2: 20

SELECT

ENU

A3: 50

ELECT

ENU

mA: 100

ELECT

ENU

EX-5150

ENMET

Manual Revision Date – June 14, 2017

Page | 9

Manual Part No. – 80003-097

5.0 Maintenance of the EX-5150-MOS

CAUTION:Do not open the EX-5150-MOS S/T in a classified area.

CAUTION:Do Not Attempt a Span Procedure Without Calibration Gas Applied to The Sensor; if this is done, the S/T is forced into a

calibration fault mode.

Magnetic switches control the MENU and SELECT functions. The MENU and SELECT switch locations are indicated on the display

panel, see Figure 3. The MENU switch is used to display the various menu options and make incremental changes to numbers such as

alarm points, calibrations gas, etc. The SELECT switch is used to select that option, set zero or span digit. Most maintenance

functions are controlled by simple taps of the supplied magnet on the transmitter glass, below the MENU and SELECT boxes on the

front panel.

5.1 Maintenance Menu

To enter the maintenance menu, hold the magnet over the MENU switch for 2 to 4 seconds

Table 1 indicates the maintenance menu sequence see Figure 5 for a detailed maintenance menu flow chart.

Table 1: EX-5150-MOS Maintenance Menus Sequence

Example of Display

Function

Normal Display Mode

Measurement of target gas

Hold the magnet over M

ENU

switch for 2 – 5 seconds to enter the Maintenance Menu

The Power/Fault LED will flash Green – Red to indicate the EX-5150-MOS is in Maintenance Mode

To exit the maintenance Menu and return to the Normal

Display Mode:

If intended function Tap the magnet over SELECT switch

Tap the magnet over the M

ENU

switch to advance to the Zero procedure

For adjusting Zero:

If intended function Tap the magnet over SELECT switch

Tap the magnet over the M

ENU

switch to advance to the Span procedure

For adjusting the Span:

If intended function Tap the magnet over SELECT switch

Tap the magnet over the M

ENU

switch to advance to each Alarm set point procedures

For adjusting the Alarm 1, 2 and 3 set points:

If Intended Function, Tap the magnet over SELECT

switch

Tap the magnet over the M

ENU

switch to advance the mA Span set point procedure

For adjusting the mA Span set point:

If intended function Tap the magnet over SELECT switch

Taping the MENU switch without taping the SELECT switch will allow you to cycle through the menu options.

You must Tap the SELECT switch to change the desired operation.

NOTE:If the S/T fails to respond, the magnet may have become weak and may need to be replaced.

5ppm

Exit

Zero

Span

mA Span

Alarm1

Alarm2 Alarm3

5LEL

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