ENMET EX-5120 Manuel utilisateur

ENMET Corporation

PO Box 979

Ann Arbor, MI 48106-0979

www.enmet.com

Manual Part Number

80003-092

MCN-13-011, 12/20/13

EX-5120

INFRARED 0 – 100% LEL

Sensor/Transmitter

Manual

Table of Contents

1.0 INTRODUCTION .......................................................................................................................................................1

1.1 Unpack...............................................................................................................................................................................1

1.2 Check Order.......................................................................................................................................................................1

1.3 Serial Numbers...................................................................................................................................................................1

2.0 FEATURES OF THE EX-5120 ...................................................................................................................................2

3.0 INSTALLATION OF THE EX-5120..............................................................................................................................3

3.1 Mounting the EX-5120 Enclosure .....................................................................................................................................3

3.2 Wiring the EX-5120 to a Control Unit...............................................................................................................................4

4.0 OPERATION OF THE EX-5120..................................................................................................................................6

4.1 Start up...............................................................................................................................................................................6

4.1.1 Typical Start Up..............................................................................................................................................................................6

4.2 Normal Display Mode........................................................................................................................................................7

4.2.1 Alarm Conditions EX-5120............................................................................................................................................................7

5.0 MAINTENANCE OF THE EX-5120 .............................................................................................................................8

5.1 Maintenance Menu.............................................................................................................................................................8

5.2 Calibration of the EX-5120................................................................................................................................................9

5.2.1 Zero Adjust......................................................................................................................................................................................9

5.2.2 Gas Span.......................................................................................................................................................................................10

5.2.3 Exit Maintenance Menu................................................................................................................................................................10

5.3 Sensor Replacement.........................................................................................................................................................12

6.0 REPLACEMENT PART NUMBERS............................................................................................................................13

7.0 WARRANTY.......................................................................................................................................................14

List of Figures and Tables

Figure 1: EX-5120 Features.......................................................................................................................................2

Figure 2: EX-5120 Mounting Dimensions ..................................................................................................................3

Figure 3: Terminal Positions EX-5120 Sensor/Transmitter .......................................................................................5

Table 1: EX-5120 maintenance Menus Sequence ....................................................................................................8

Figure 4: Calibration Adapter EX-5120 Sensor/Transmitter ......................................................................................9

Figure 5: EX-5120 Maintenance Menu Flow chart...................................................................................................11

Figure 6: Sensor Replacement ................................................................................................................................12

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…]

ARNING

[affects personnel safety – if not followed may cause bodily injury or death.]

EX-5120 ENMET Corporation

1.0 Introduction

The ENMET EX-5120 infrared sensor/transmitter (S/T) is a 3-wire, 24Vdc, 4-20mA S/T for the detection of combustible gas.

The EX-5120 is meant to be used in conjunction with an appropriate power supply and controller.

The ENMET EX-5120 sensor/transmitter has been designed for use in a Class I, Div. 1, Groups B, C, D, classified areas.

OTE

:All specifications stated in this manual may change without notice.

1.1 Unpack

Unpack the EX-5120 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

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-5120 is received as ordered. [Each EX-

5120 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-5120 is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.

EX-5120 ENMET Corporation

2.0 Features of the EX-5120

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:

POT 3: Not Used, Do not adjust

POT 4:

Visual Alarms LED indicators:

Power / Fault Indicator LED, Green / Red

Alarm (3) Indicator Red LED, user adjustable

Magnetic Switches MENU: 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

Infrared Sensor For sensing gas at LEL levels, see Section 6.0 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 in order to perform

calibration.

Three alarm points are preprogrammed into the EX-5120 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.

Figure 1: EX-5120 Features

3 Alarm

Indicators

Power /Fault

Indicator

Display

ENU

Magnetic switch

ELECT

Magnetic switch

Sensor

External View

Menu Select

POT 3

See Note

POT 4

See Note

POT 2

See Note

POT 1

Display Contrast

Internal PCB View

Note:

POT 2, POT 3and POT 4

are not used, Do Not Adjust

EX-5120 ENMET Corporation

3.0 Installation of the EX-5120

CAUTION:

Area must be declassified during installation.

The ENMET EX-5120 gas sensor/transmitter (S/T) is a 3-wire, 24 Vdc, 4-20 mA S/T for the detection of combustible gas.

The S/T is meant to be used in conjunction with an appropriate power supply and controller.

The ENMET EX-5120 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 known hazards. Also, take precautions to insure

condensation inside of the conduit does not enter the S/T.

3.1 Mounting the EX-5120 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. 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-5120 Mounting Dimensions

Optional

Conduit fitting

Typically: ½″NPT female

Mounting Holes

2 places, 0.313″

Sensor

Sensor/Transmitter

Enclosure Side View

Sensor

″

NPT female

Sensor/Transmitter

Enclosure Top View

Sel

ect

EX-5120 ENMET Corporation

3.2 Wiring the EX-5120 to a Control Unit

CAUTION:

Area must be declassified during installation.

Run conduit and 16 AWG (1.5MM

)wires to the enclosure from the power supply and controller. If the EX-5120 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

LUG

–

ERMINAL TO

ONTROLLER

IRING

Position

Function

1 +24 V

power

2 –GND

3 s4 - 20 mA out

4* RS-485 D+

5* RS-485 D–

*Contact ENMET for Modbus

Address information

LUG

–

ERMINAL TO

ENSOR

IRING

Position Function

Sensor

1 +Power Red

2 sSignal White

3 –GND Black

Circuit Board Bottom View

1 2 3

Plug J8

To J8

Wires to

Sensor

Plug J4

To J4

Wires to

Controller

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

) 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 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.

EX-5120 ENMET Corporation

Figure 3: Terminal Positions EX-5120 Sensor/Transmitter

When wiring is complete, reassemble the

EX-5120

. 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

Display Overlay

EX-5120

ENMET Corporation

4.0 Operation of the EX-5120

It is best to have the

EX-5120

transmitters powered up, operational and stable for several minutes before applying calibration

or test gas to them.

When the

EX-5120

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 of 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.

Consult ENMET Distributor or ENMET Corp

4.1 Start up

4.1.1 Typical Start Up

When power is supplied to the

EX-5120,

the S/T will display the following sequence of information:

OTE

Software revision may cause variations of display output.

Example of Display Function

The instrument: Model

5120

The instrument: Serial Number

The instrument: Software Revision

the right most character is a flashing

The instrument is in Warm-up mode



This should last about 1 minute



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

The instrument: Normal Display Mode

Measurement of target Gas

5120

1256

S/W X.X

0%W

EX-5120

ENMET Corporation

4.2 Normal Display Mode

When the

EX-5120

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-5120.

The red alarm and fault LEDs are

not lit.

To advance through displays of operational information tap the magnet over the

button.

OTE

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 M

ENU

button

Display indicates Alarm 1 Set point

Tap the magnet over the M

ENU

button

Display indicates Alarm 2 Set point

Tap the magnet over the M

ENU

button

No Function for the

ELECT

button

in this mode

Display indicates Alarm 3 Set point

Tap the magnet over the M

ENU

button

Display indicates mA Span range

(Full Scale)

Tap the magnet over the M

ENU

button

Display returns to gas measurement

Operational Display Flow Chart

4.2.1 Alarm Conditions EX-5120

There are three alarm set points available. These 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.

A1:

ELECT

ENU

A2:

ELECT

ENU

A3:

ELECT

ENU

mA:

100

ELECT

EX-5120

ENMET Corporation

5.0 Maintenance of the EX-5120

CAUTION:

Do not open the

EX-5120

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

and

SELECT

functions. The

and

SELECT

switch locations are indicated on the

display panel, see

Figure 3.

The

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

and

SELECT

boxes on the front panel.

5.1 Maintenance Menu

To enter the maintenance menu hold the magnet over the

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-5120 maintenance Menus Sequence

Example of Display Function

Normal Display Mode

Measurement of target gas

Hold the magnet over

switch for 2 – 5 seconds to enter the Maintenance Menu

The Power/Fault LED will flash Green – Red to indicate the

EX-5120

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

switch to advance to the Zero procedure

For adjusting Zero:

If intended function Tap the magnet over

SELECT

switch

Tap the magnet over the

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

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

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

switch without taping the

SELECT

switch will allow you to cycle through the menu options.

You must Tap the

SELECT

switch in order 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.

Exit

Zero

Span

mA Span

Alarm1

Alarm2

Alarm3

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