ENMET MX-52 User Manual

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Page 1

ENMET

ENMET Corporation

ENMETENMET

PO Box 979 Ann Arbor, MI 48106-0979

80003-052 July 1999 MCN-233, 05/26/00 MCN-286, 10/17/02 MCN-300, 08/21/03 MCN-306, 10/03/03 MCN-360, 10/30/06

MX52 C

Manual

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Page 2

Page 3

Table of Contents

1.0 I

NTRODUCTION

1.1.2 Unpack...................................................................................................................................................................................1

1.1.3 Check Order...........................................................................................................................................................................1

1.1.4 Serial Numbers....................................................................................................................................................................... 1

2.0 S

PECIFICATIONS

3.0 F

EATURES

4.0 I

NSTALLATION

4.1 Installation recommendations......................................................................................................................................6

4.2 Electrical Connections of the MX52 C

4.2.1 Power Supply.........................................................................................................................................................................7

4.2.2 DC Power supply....................................................................................................................................................................7

4.3 Channel Board Connections........................................................................................................................................7

4.3.1 Sensor/Transmitter.................................................................................................................................................................7

4.3.2 4-20mA Output Signal ............................................................................................................................................................7

4.3.3 Relay Contacts .......................................................................................................................................................................7

4.3.4 Wiring Requirements..............................................................................................................................................................7

4.4 Connecting the MX52 C

4.4.1 Alarm Relays..........................................................................................................................................................................8

4.4.2 The 4-20mA Current Outputs..................................................................................................................................................9

4.4.3 Series Output........................................................................................................................................................................ 10

4.4.4 Remote Acknowledgement..................................................................................................................................................... 10

5.0 O

PERATION

5.1 Starting Up...............................................................................................................................................................11

5.1.1 Checking the Installation...................................................................................................................................................... 11

5.1.2 Switching the MX52 C

5.2 Operating Modes ......................................................................................................................................................12

5.2.1 Audio Alarm (Buzzer)........................................................................................................................................................... 12

5.2.2 Light-emitting diodes (LED) (Figure 10)...............................................................................................................................13

5.2.3 Alarm Thresholds................................................................................................................................................................. 13

5.2.4 Fault Thresholds ..................................................................................................................................................................15

5.2.5 Standard Display..................................................................................................................................................................15

5.3 Functions of Switches and Menus for Programming and Calibration of MX52 C

5.3.1 Keypad (see Figures 10 and 4).............................................................................................................................................. 16

5.3.2 Maintenance Switches........................................................................................................................................................... 16

5.3.3 Potentiometers...................................................................................................................................................................... 16

5.4 Menus......................................................................................................................................................................17

5.4.1 Menus and their Functions....................................................................................................................................................17

5.4.2 Legend for Block Diagrams of Programming Menus.............................................................................................................. 17

5.4.3 Bock Diagram of Scrolling Programming Menus...................................................................................................................18

5.4.4 Block Diagram of Channel Programming Menu....................................................................................................................19

5.4.5 Block Diagram of Simulation Programming Menu.................................................................................................................24

5.4.6 Block Diagram of Programming Copy Channel..................................................................................................................... 25

5.4.7 Block Diagram of Programming Control Unit.......................................................................................................................26

5.4.8 Block Diagram of Reprogramming Programming..................................................................................................................28

5.5 Startup of the MX52 C

5.5.1 Programming the Control..................................................................................................................................................... 29

5.5.2 Programming the Channels................................................................................................................................................... 29

5.5.3 Calibrations.........................................................................................................................................................................29

6.0 M

AINTENANCE

6.1 Periodic / Preventive Maintenance............................................................................................................................31

6.1.1 On the MX52 C

6.1.2 On the Sensor/Transmitters...................................................................................................................................................31

6.2 Troubleshooting: Symptoms and Remedies...............................................................................................................32

7.0 WARRANTY................................................................................................................................................ 34

PPENDIX

A: L

Replacement Part Numbers.............................................................................................................................................35

PPENDIX

B: L

................................................................................................................................................. 1

.............................................................................................................................................. 2

....................................................................................................................................................... 5

.................................................................................................................................................. 6

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to External Devices ..................................................................................................8

............................................................................................................7

................................................................................................................................................... 11

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On........................................................................................................................................12

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.................................................................................................................................29

...........................................16

............................................................................................................................................... 31

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........................................................................................................................................................31

IST OF UNITS

IST OF GASES

................................................................................................................................. 35

................................................................................................................................ 36

Page 4

The List of Illustrations

Figure 1: MX52 Overall Dimensions...................................................................................................................................3

Figure 2: MX52 C Figure 3: MX52 C Figure 4: MX52 C

Figure 5: Power Board and Module....................................................................................................................................6

Figure 7: Channel Board....................................................................................................................................................8

Figure 8: Example of External Device Connection.............................................................................................................9

Figure 9A: Pinout of the MX52 Serial Link Connector Sub D..........................................................................................10

Figure 9: Micro Board......................................................................................................................................................10

Figure 10: Operation Components....................................................................................................................................11

Block Diagram 1: Normal Cycle with Manual Clearing....................................................................................................13

Block Diagram 2: Normal Cycle with Automatic Clearing................................................................................................14

Block Diagram 3: Parking Cycle.......................................................................................................................................14

Block Diagram 4: Fault ....................................................................................................................................................15

Figure 11: Potentiometer Layout on Front of Channel Board ..........................................................................................30

Figure 12: Channel Board, Outputs on Rear Connector...................................................................................................31

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Front View, Internal.................................................................................................................4

Rear View..................................................................................................................................4

Features....................................................................................................................................5

Reference information:

OTE

: [important information about use of instrument – if not followed may have to redo some steps.]

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.]

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MX52 C

1.0 Introduction

1.0 Introduction1.0 Introduction

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The MX52 C

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ENMET Corporation

can include from 1 to 16 independent channels.

Each channel is connected to one or more 4-20 mA sensor/transmitters installed in the locations to be monitored. The output from each sensor/transmitter (S/T) is displayed on the MX52 C

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and compared with alarm

thresholds. If thresholds are exceeded, the control actuates relays that can be used to control external devices. Each PCB installed in the MX52 C

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is equipped with circuits for two independent channels. The number of

PCB’s is always half the even number equal to or one greater than the number of channels installed.

OTE

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

1.1 Upon Receipt

1.1.2 Unpack

Unpack the MX52 C customer service personnel and the commercial carrier involved immediately.

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and examine it for shipping damage. If such damage is observed, notify both ENMET

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

1.1.3 Check Order

Check, the contents of the shipment against the purchase order. Verify that the MX52 C ordered. Each MX52 C

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is programmed with the target gas for each channel. 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.

1.1.4 Serial Numbers

Each MX52 C database.

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

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received is, as

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ENMET Corporation MX52 C

2.0 Specifications

2.0 Specifications2.0 Specifications

See Figure 1 for overall dimensions and Figures 2 and 3 for front and rear views.

Enclosure:

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Overall dimensions Function Capacity Measurement Storage temperature Operation temperature Relative humidity

Visual

Display

Alarms Audio Alarms Alarm remote acknowledgement Inputs Active 2-wire or 3-wire shielded cables according to the type of

Signal Outputs

Rack 3U 19″ Control 16 measuring channels Continuous –20 C to +55 C –10 C to +45 C 0 to 95% humidity, no condensation

Fluorescent display panel, 2 lines of 16 characters 80 LED (power on, gas alarms, faults)

sensor/transmitters Resistance in loop mode 4-20mA, 2-wire or 3-wire 56Ω (2,000m with wire 1.5

mm2 at 20 C) 4-20mA analog per channel, maximum load resistance = 600Ω

Serial: RS 485 / J BUS, common

Relay Outputs 2 independent alarm relays per channel

1 common relay for alarm 3 or audio alarm transfer 1 common fault relay

Power Supply AC or DC power supply

103 to 122 V 207 to 244 VAC (Optional) 21 to 31 V Power consumption: 300 Va or 240 W

OTE

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

Page 7

MX52 C

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ENMET Corporation

Dimensions are in inches

Top View

Front View

Figure 1: MX52 Overall Dimensions

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ENMET Corporation MX52 C

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Figure 2: MX52 C

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Front View, Internal

Figure 3: MX52 C

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Rear View

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MX52 C

2 channels per board

Buzzer

3.0 Features

3.0 Features3.0 Features

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See Figure 4 for features.

Power Card

Display

On/Off Pushbutton Switch Keypad

Buzzer LEDs Interconnect board Channel Boards

Micro Board

Description Function

Internal power supply See figures 5 for detail.

For visual display of: Channel, Gas (type and reading), Data when programming etc…

To power up and remove power of the MX52 C Pushbutton switches used in programming and calibration

See figure 10 for detail For audio alarms For visual alarms Interface for: Channel boards, Display, Keypad, LED and Buzzer Control for each channel: .2 channels per board

See figure 7 for detail. Connection for remote access of MX52

See figure 9

Power Supply Refer to Figure 5

ENMET Corporation

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Power Supply Card

Refer to figure 5

Display

Keypad Area

Pushbutton switches

On/Off

Pushbutton

Switch

FRONT interconnect board

Rows of LEDs

for each channel

Rows of POTs

for each channel

Micro Board See figure 9 for detail

8 Channel boards

• 2 channels per board See figure 7 for detail

Channel board

Figure 4: MX52 C

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Features

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ENMET Corporation MX52 C

Note:

4.0 Installation

4.0 Installation4.0 Installation

4.1 Installation recommendations

The MX52 C ventilated and monitored location, such as guardhouse, control room, instrumentation room, etc.

The control can be mounted in any standard 19″ rack. See Figure 1 for dimensions. Optional enclosures and wall shelves are available.

Before making any connections, switch off the power using the main On/Off switch below and to the left of the FRONT circuit (see Figures 4 and 10).

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can be installed in any area without a hazardous atmosphere. It should preferably be placed in a

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Power Supply Terminal

Earth Ground

Terminal

Power connections are located on a terminal strip in this location.

Note the location of the relevant positions as labeled on the terminal strip and wire accordingly. Positions of the AC & DC contacts may vary depending on the required power supply

Figure 5: Power Board and Module

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MX52 C

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ENMET Corporation

4.2 Electrical Connections of the MX52 C

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4.2.1 Power Supply

 Voltage: 115 VAC (103 to 122 V) 50/60 Hz  Maximum power: 300 VA  Maximum current in cable: 1.5 A  Power wire, 3 conductors, 16g  Location of connection terminal blocks, see Figure 5  Protection: Overvoltage Clamp, 130 – 150% & Current Limit 130% typ, Self-Reset Foldback  Voltage: 207 to 244 V

ARNING

AUTION

Continuous gas detection and alarm systems (110VAC/220VAC /24VDC/12VDC powered) become

inoperative upon loss of primary power. Contact factory for specifications and pricing of backup battery systems.

It is mandatory that the instrument must be grounded to earth ground. This normally occurs through the ground (green) wire of the AC power system. A terminal is also reserved for this purpose at the back of the power card, see Figure 5. The ground connection is required in order to ensure correct operation of the following

• Power interference filter

• Protective devices against electromagnetic interference

- 50/60 Hz on option

4.2.2 DC Power supply

 Voltage: 21 to 30 V  Maximum power: 240 W  Maximum current in cable: 12.5 A  Cable: 2 x 14g  Location of terminal block, see Figure 5  Protection: Two fuses located at the back of the power card. See figure 5

4.3 Channel Board Connections

Each channel board includes terminal strips for each of two channels. The terminal strips for odd-numbered channels are at the top, the terminal strips for even-numbered channels are at the bottom of each channel board. Figure 7 shows these I/O terminal strips and identifies the positions on them.

4.3.1 Sensor/Transmitter

Sensor/Transmitters are connected to positions C1, C2 and C3 on each channel terminal strip. Connections are as follows:

Two Wire Sensor/Transmitter Three wire Sensor/Transmitter

C1 Signal, minus C1 Signal C2 Not used C2 Ground C3 Signal, plus and +24VDC power C3 +24VDC power

4.3.2 4-20mA Output Signal

The next two (+ 4-20mA –) positions in each terminal is the 4-20mA output from the C sides of the loop are indicated on the terminal strip.

4.3.3 Relay Contacts

MX52 C

indicated in Figure 7. These relays have a maximum capacity of 2 Amp at 230 Volts, and are programmed as described in Section 4.4.1. Open or closed contacts are selected with jumpers on the channel board as indicated in Figure7.

Figure 8 shows an example of external devices controlled by the MX52 C The system alarm relay contacts AL3 are on the power supply board, as shown in Figure 5.

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relay contacts for the first two alarm levels are on the next four positions on the terminal strips, as

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4.3.4 Wiring Requirements

Sensor/Transmitters: Wiring to the sensor/transmitters should be by two or three wire shielded cable. The recommended cable is 18 gauge three wire, ENMET part number 66017-006, Alpha-1747C or equivalent.

Output Loop: Wiring to output loop should be similar two wire shielded cable. Relay: Relay wiring must be suitable insulated wire.

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relay contacts.

. The plus and minus

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ENMET Corporation MX52 C

Output connector

Signal Fuse

Line Fuse

Odd-numbered channel

Potentiometers

4-20mA

Relay Alarm 2

End View

End ViewEnd View

End View

Signal Fuse

Side View

4.4 Connecting the MX52 C

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to External Devices

4.4.1 Alarm Relays

The 16 channels of the MX52 C devices such as sirens, solenoid valves, extractors, telephone callers, etc… Auxiliary alarms should be powered from an independent power source separate from instrument power to avoid alarm failure due to controller malfunction.

An example of connection is given in Figure 8

OR EACH CHANNEL

The following relays are available (see Figure 7 and 12):

 A relay associated with the triggering of alarm 1.  A relay associated with the triggering of alarm 2.  Use of open or closed contacts selected with a jumper (see Figure 7).  Use of positive or negative safety selected by programming (see the CHANNEL programming menu).  Contact outputs on the back of the two channel PCB (see Figure 12).

OR SYSTEM RELAY

 A relay associated with the triggering of alarm 3.  A relay associated with the triggering of a system fault.

Odd-numbered channel

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unit are each equipped with two relays that can be used to control external

Odd-numbered channel See End view, below

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Even-numbered channel

Odd-numbered channel

Even-numbered channel

C1 C2 C3

Relay Alarm 1

Odd-numbered channel

Relay Al1

odd channel

Relay Al2

odd channel

Relay Al1

even channel

Relay Al2

even channel

Even-numbered channel See End View, below

+ –

Output connector

Odd-numbered Channels

Jumpers

Open/closed contacts Factory set NC

Even-numbered channel Jumpers

Open/closed contacts Factory set NC

Relay Alarm 1 Relay Alarm 2

Figure 7: Channel Board

C1 C2

+ –

Output connector

Even-numbered Channels

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MX52 C

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OTE

: Auxiliary alarms should be powered from an independent

110V

power source separate from instrument power to avoid alarm failure due to controller malfunction.

Figure 8: Example of External Device Connection

ENMET Corporation

 A siren connected to relay AL1 is actuated when alarm 1 is triggered,  A solenoid valve connected to relay AL2 is actuated when alarm 2 is triggered.

OR ALL CHANNELS

A common relay is associated with the triggering of alarm 3 for any and all of the 16 channels. By programming, this common relay can also be used for the remote transmission of the audio warning signal. This

relay is then associated with all the control alarms. (See Figure 5) A Fault relay associated with the triggering of channel faults (detector failures, electrical connections, excessively

negative zero, etc.). The Fault Relay is normally closed, it opens when in fault condition. Common relay contact outputs are on the back of the power card: Figure 5.

OTE

: The breaking capacity of the MX52 C

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relay contacts is 2 A / 250 V

or 30 VDC, so external

intermediate relays must be used if the devices to be controlled require high current levels.

4.4.2 The 4-20mA Current Outputs

For each channel, the MX52 C sensor/transmitter outputs to a recorder, an external PLC or a computer. The maximum resistance in loop mode is 600 ohms. The ground connections for the 4-20 mA outputs are common. The 4-20 mA lines are not galvanically insulated one from the other. The current output varies according to the situation and has several conditions other than normal, as follows:

 On starting up the unit: I < 1 mA  With FAULT: I < 1 mA  In MAINTENANCE mode: I = 2 mA  ZERO MEASUREMENT: I = 4 mA  Full scale: I = 20 mA  Out of range or “in doubt”: I > 23.2 mA

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is equipped with a 4-20 mA output that can be used to retransmit

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ENMET Corporation MX52 C

4.4.3 Series Output

A single “sub. D” connector located on the back of the micro board is equipped with both an RS485 output in J-BUS format for the uploading of data from the MX52 unit to a computer and an RS 232 output for programming of the

MX52 C

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Several MX52 C number is assigned to each MX52 C

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A computer must be used in order to printout the data stored by the MX52 C

external environment. See Figure 9A for details of the pinout of this connector.

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can be connected to a single computer which is the “MASTER”. In this case, a SLAVE

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Pin 1

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Pin 6

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Pin 5

Figure 9A: Pinout of the MX52 Serial Link Connector Sub D

4.4.4 Remote Acknowledgement

It is possible to allow remote acknowledgement by connecting a momentary push-button, to the terminals provided for that purpose on the back of the micro board: see Figure 9.

ICRO BOARD

part number 02625-002

ICRO BOARD

part number 02625-003

Used to isolate Signal Ground from Chassis Ground. Desirable when connecting several MX52 control units

together as in a “Master”, “Slave” situation, or when using a computer/PLC setup.

: Standard

Connector Sub D Output RS485 See Figure 9A

Connector for Remote Acknowledgement of Alarm

Micro Processor

: with Galvanic Isolation

Pin 9

Figure 9: Micro Board

Page 15

MX52 C

See detail 10a below

5.0 Operation

5.0 Operation5.0 Operation

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ENMET Corporation

5.1 Starting Up

5.1.1 Checking the Installation

Ascertain that all connections have been made and that the complete installation complies with current standards in force.

ARNING

ENMET Corporation is not responsible for the compliance of the complete electrical safety system.

The MX52 C

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power input should be protected with circuit breakers provided for that purpose, and that assure protection of the power unit. The circuit breakers are to be selected according to the power consumption levels specified by the manufacturer and the length of the electric cables. The circuit breakers can also be used to interrupt power to the control

Display

Keypad area

Item D

On/Off switch

Item A

Programming switch

Item B

Calibration switch

Optional Buzzer switch

Item C

Detail 10a: Optional Buzzer switch

Figure 10: Operation Components

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ENMET Corporation MX52 C

Line corresponding to

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5.1.2 Switching the MX52 C

To start up the MX52 C

 Swivel the front panel.  Press the ON/OFF button located to the bottom left-hand side of the FRONT circuit: see Figures 4 and 10 (item A).  The display panel then shows, for example:

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ENMET MX48/52 V2.0r12

The unit then goes into INITIALIZATION mode for one minute. Consequently, all the alarms are inhibited and the current outputs are 1 mA for the channels in service. The unit then performs a self-test on its buzzer and all its lightemitting diodes. At the end of this one-minute period, the channels in service return to normal operation and the corresponding alarms and relays are enabled.

The user can carry out a “manual-self test” by pressing the test key at any time (see Figure 10). This self-test lasts 20 seconds and the display panel may show the following displays one after the other, for example:

Channel 1 XX ppm Cl2

Then

the channel displayed when the ENTER switch was pressed

******* SELF-TEST ******

XX ppm Cl2

The user can interrupt the self-test cycle before it is completed by pressing the ACKNOWLEDGEMENT switch.

OTE

: In some applications, slight electronic noise between the Sensor/Transmitter and the Control can cause

fluctuations in the display reading. These minor fluctuations are considered to be insignificant in terms of the range, detection limit and alarm values of the gas being monitored.

5.2 Operating Modes

5.2.1 Audio Alarm (Buzzer)

In normal operation, the audio alarm is triggered whenever a fault or an alarm threshold is exceeded. The audio alarm can be stopped by pressing the ACKNOWLEDGEMENT switch or by remote acknowledgement. The buzzer makes a continuous or pulsed sound, according to the programming of the control, when an alarm threshold is exceeded.

Page 17

MX52 C

Illumination of

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ENMET Corporation

5.2.2 Light-emitting diodes (LED) (Figure 10)

Each channel is equipped with five LEDs, when are visible and identified on the FRONT panel.

LED Extinguished Illuminated steady mode Flashing

GREEN Channel not in service Channel in service Channel in service

1st red AL1 not triggered Threshold AL1 exceeded

(automatic clearing)

2nd red AL2 not triggered Threshold AL2 exceeded

(automatic clearing)

3rd red AL3 not triggered Threshold AL3 exceeded by

mean or time

(automatic clearing)

Threshold AL1 exceeded

(manual clearing)

Threshold AL2 exceeded

(manual clearing)

Threshold AL3 exceeded by

mean or time

(automatic clearing)

Yellow No fault Fault on channel - Channel being calibrated or

programmed

- Detector being calibrated

5.2.3 Alarm Thresholds

Each of the three alarm thresholds can be programmed independently for each channel. (See the “Channel programming” menu).

In normal operation, a gas alarm is only triggered after a preprogrammed time delay in order to avoid spurious alarms. Alarm thresholds can be processed in the following manners:

 In normal cycle with manual clearing: block diagram 1.  In normal cycle with automatic clearing: block diagram 2.  In parking cycle: block diagram 3.

The alarm thresholds are to be selected according to the gases detected and the corresponding standards in force. T = Time of 5 seconds or alarm 3 time delay

START

Alarm acknowledged

Yes

LED extinguished

Relay disengaged

Buzzer stopped

No Yes

Threshold exceeded

flashing alarm LED

After T2 time

Relay engaged

Buzzer engaged

Alarm acknowledged

LED steady mode

Buzzer stopped

END

Illumination of

flashing alarm LED

Yes Yes

Time T exceeded

Alarm LED

extinguished

Yes

Block Diagram 1: Normal Cycle with Manual Clearing

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ENMET Corporation MX52 C

Starting of

Illumination of

T = Time of 5 seconds or alarm 3 time delay

START

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No Yes

LED extinguished

Relay disengaged

Threshold exceeded

flashing alarm LED

After T2 time

Relay engaged

Buzzer engaged

Alarm LED illumi-

nated in steady mode

Yes No

Time T exceeded

END

Alarm LED

extinguished

Block Diagram 2: Normal Cycle with Automatic Clearing

Alarm 3 operates in the same way as the normal cycle. The times defined for alarms 1 and 2 (time delays) are, in this case, used to define the minimum operating time for

each relay.

t AL1 tR1 R2 t AL2

Threshold AL2

Threshold AL1

AL1

AL2

R1 R2

Min. operating time for alarm 1 (defined for each channel) Min. operating time for alarm 2 (defined for each channel) Switching time from relay 1 to relay 2 (defined for the whole unit)

Starting of

relay R1

Stopping of

relay R1

relay R2

Block Diagram 3: Parking Cycle

Stopping of

relay R2

min.

R1 & R2

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MX52 C

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ENMET Corporation

5.2.4 Fault Thresholds

Processing of detector faults, Each channel detects the following faults.

For toxic and explosive gas detectors:

 line interrupted (0 mA),  line short-circuited or excessive consumption,  negative offset (more than 20% of measuring scale),  line in calibration mode (2 mA) (if confirmed by programming).

For sensor/transmitter for combustible gas type (4-20 mA and 340 mA) in normal mode, if the measurement is greater than 100% of the measuring scale, the following occur immediately:

 Display: SUP  The relays are actuated if the thresholds are exceeded.  The general fault relay is actuated.  The 4-20 mA output of the channel is greater than 20 mA.  All these states are memorized and the only way of acknowledging them is to switch off the channel and then

restart it. Faults are valid after a preprogrammed time (in the same way as alarms). * The LED is extinguished as soon as the fault disappears.

START

Wait until the fault has been present

for at least 5 seconds.

The relays are locked in their current state.

The common fault relay is engaged.

The buzzer is engaged.

The channel fault LED is illuminated. *

1 mA is sent on the 4-20 mA output.

END

Block Diagram 4: Fault

5.2.5 Standard Display

One minute after starting up, and if no test action is performed on the keypad, the unit successively scans all the channels in service and displays the values.

Channel 1 XXX LEL CH4

 Each channel is interrogated for 10 seconds.  The user can interrogate a channel manually by selecting that channel with the + and – switches to obtain a

manual display for one minute.

 The user can return to normal cyclic scanning during that one-minute period by simultaneously pressing the + and

– switches. The display panel then shows alternating displays, three times in succession:

Examples of display:

normal scan

For example:

THEN

XXX ppm CO

Channel 2 XXX ppm Cl2

Channel 5 XXX ppm CO

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ENMET Corporation MX52 C

5.3 Functions of Switches and Menus for Programming and Calibration of MX52 C

5.3.1 Keypad (see Figures 10 and 4)

The keypad is equipped with four touch switches accessible without opening and swiveling the MX52 C FRONT panel. See Item D, Figure 10

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––––

++++

AACCQQUUIIT

TTEESSTT / EENNTTEER

––––

- Manual display of previous channel

- Manual display of previous menu

- Decrease value, threshold, etc.

- Display of previous choice (on ← off, etc.)

- NO

- Combined with the “PLUS” switch to restart the channel’s automatic display cycle.

- Manual display of next channel

- Manual display of next menu

- Increase value, threshold, etc.

- Display of next choice (on ← off, etc.)

- YES

- Combined with the “MINUS” switch to restart the channel’s automatic display cycle.

- “Audio and visual” or “audio” clearing of an alarm

- Exit from a current menu

- Start a self-test manually

- VALIDATE

++++

AACCQQUUIIT

TTEESSTT /

EENNTTEER

5.3.2 Maintenance Switches

PROGRAMMING key (Item B, Figure 10): accessible after opening and swiveling the front panel.

 Combined with the “–” key to go back in a menu.  To quit normal display mode and access the various menus (see block diagram of the various menus).  To scroll through a menu.

CALIBRATION key (Item C, Figure 10): accessible after opening and swiveling the front panel.

 To set a channel to CALIBRATION mode.  To quit that mode.

5.3.3 Potentiometers

On the FRONT circuit, each channel has four potentiometers (Item E in Figures 10 and 11). These are accessible by opening and swiveling the FRONT panel of the MX52 C

TOP (item A) 1 sensor/transmitter ZERO potentiometer

1 sensor/transmitter sensitivity potentiometer

BOTTOM (item B) 1 potentiometer 4 mA / current output

1 potentiometer 20 mA / current output (for full scale)

ONTROL

and are laid out as follows (see Figure 11):

Page 21

MX52 C

EN TE R

ONTROL

ENMET Corporation

5.4 Menus

5.4.1 Menus and their Functions

The MX52 C These five menus are as follows:

DESIGNATION FUNCTION

“CHANNEL” programming - To program the whole configuration of a channel (ON/OFF, range, alarm thresholds, etc...) “SIMULATION” programming - To artificially vary a channel measurement on:

“CHANNEL COPY” programming - To copy the complete programming from one channel to another (time saving) “UNIT” programming “UPLOADING” programming - To transfer data, measurements and events, etc., from the unit to a computer via the MX52

The bock diagrams for these menus are in sections 5.4.4 through 5.4.8.

5.4.2 Legend for Block Diagrams of Programming Menus

It is easy to use these various menus by means of the switches on the keypad and the “Programming” switch (Items B and D, Figure 10).

Detailed flow diagrams of the menu scrolling function and of each menu are given on the following sections.

ONTROL

has five menus that are accessed by pressing the “Programming” switch (Item B, Figure 10).

- the display panel,

- the 4-20 mA current output.

- To trigger the alarms (LED and relays) at the same time.

- To program the whole configuration of the MX52 C

ONTROL

RS 485 / J BUS output.

Programming switch

ONTROL

(language, slave number, etc.).

AACCQQUUIIT

[ ]

(1) Free

Set to  Set to 1

++++

––––

TTEESSTT /

EENNTTEER

This switch can also be used to exit from the current menu.

When in a menu, you can go back (to make checks or modifications, etc...) by pressing and holding down switch

Programming switch.

Parameters specified in square brackets [ ] are the VALID parameters (in memory). This means that the relay can be controlled freely in positive or normal safety mode

(programming by MX52). This means that the relay will be controlled, set to 0 or 1, and programmed directly via

the J.BUS input and the “

Switch used to move forward

Switch used to move in reverse

Switch used to enter data

and by successively pressing and releasing the

COM

52” software.

Page 22

ENMET Corporation MX52 C

–

To program the whole configuration of a channel

To artificially vary a channel measurement on:

To copy the complete programming from one channel to another

To transfer data, measurements and events, etc., from the unit to a

5.4.3 Bock Diagram of Scrolling Programming Menus

NORMAL

DISPLAY

ONTROL

Programming

[Channel xx]

Programming

Simulation [Channel xx]

Programming

Copy [Channel xx]

Programming

Control Unit

(ON/OFF, range, alarm thresholds, etc...)

- the display panel,

- the 4-20 mA current output.

To trigger the alarms (LED and relays) at the same time.

(time saving)

To program the whole configuration of the MX52 C (language, slave number, etc.).

ONTROL

Programming

Reprogramming

computer via the MX52 C

ONTROL

RS 485 / J BUS output.

Page 23

MX52 C

←

ENTER

+→+→+→+→+→+

ENTER

→

ENTER

→

ENTER

Seuil

Alarme 1

Channel

Measuring range

Decimal point

Alarm 1 threshold

Alarm 2 threshold

ONTROL

5.4.4 Block Diagram of Channel Programming Menu

NORMAL

[25]

DISPLAY

ENMET Corporation

Programming

[Channel xx]

[Off]

[1

]



[1.]

: Last channel displayed

: Off On

→

: CHOICE OF RANGES 1 31 3 1 2 xxxx U

: SELECTION OF POINT POSITIONING 1 1. 1. .1 .1

.1

→+→+→+→

then

[25]

[5]

Continued On Next Page

:  to 2

←

: to 2

←

then

Page 24

ENMET Corporation MX52 C

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

Alarm 2

Alarm 3 threshold

Alarm 3

Cycle

Continued From Previous Page

:  to 2

[75]

→

then

ONTROL

Alarm 1

[Increasing]

: Increasing Decreasing

→

: Increasing Decreasing

→

: Increasing Decreasing

→

: Normal Parking

→

then

[Normal]

Continued On Next Page

Page 25

MX52 C

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

Ack alarm 1

Ack alarm 2

Alarm 3

Relay 1 safety

Relay 2 safety

Relay 1

ONTROL

Continued From Previous Page

[Manual]

[Time Lag]

Manual Automatic

→

Manual Automatic

→

Time delay Mean

→

ENMET Corporation

then

[Positive]

[Free]

Negative Positive

→

Negative Positive

→

Free Set to  Set to 1

→

then

→

then

Continued On Next Page

Page 26

ENMET Corporation MX52 C

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

Relay 2

Relay 3

Fault relay

Auto Calibration

Gas

Channel

Continued From Previous Page

Free Set to  Set to 1

[Free]

→

Free Set to  Set to 1

→

Free Set to  Set to 1

→

then

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[No]

[Premises 1 channel] U

[CH4]

Flashing

The MX52 unit can detect and indicate (with a flashing yellow LED) that a line has-been placed in CALIBRATION mode on the detector.

No Yes

→

Free display: A channel heading can be programmed (in 13 characters maximum). By default, the channel number is displayed in this area.

→

CH4 CO 2S etc.

→

then

→

then

Continued On Next Page

Page 27

MX52 C

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

Units

Alarm 2 time

Alarm 3 time

Alarm 1 time

Detector type

ONTROL

Continued From Previous Page

[LEL]

[00:00:05]

HH : mn : sec

[00:00:05]

ENMET Corporation

LEL % ppm etc.

→

Time: Time interval between the triggering of the AL LED and of the corresponding relay, or the minimum operating time of the relay in parking mode.

→

OTE

: Factory default setting is 5 seconds.

Display of time by using switches

→

OTE

: Factory default setting is 5 seconds.

→

then

HH : mn : sec

[00:00:05]

HH : mn : sec

[Explosive]

ND OF MENU

Text

→

OTE

: Factory default setting is 5 seconds.

: Explosive Toxic Spec. tox.

→

then

→

then

Page 28

ENMET Corporation MX52 C

←

5.4.5 Block Diagram of Simulation Programming Menu

NORMAL

DISPLAY

ONTROL

Programming

[Simulation xx]

Programming

[Simulation xx]

Channel xx

ENTER

→

Simulation on previously displayed and [validated] channel

Free labeled area

S = flashing to indicate that this channel is in

simulation mode.

LEL CH4 S

To artificially vary measurement on the display panel, on the 4-20 mA output, and trigger alarms (LED and relays)

ACK

ND OF MENU

= ESCAPE To exit from this menu and return to normal operation

Page 29

MX52 C

←

ONTROL

5.4.6 Block Diagram of Programming Copy Channel

NORMAL

DISPLAY

ENMET Corporation

+ +

Programming

Copy channel xx

ENTER

Programming

[Copy channel xx]

Copy channel

[Channel xx => xx]

ENTER

Last channel displayed

Validation of menu

Validation of channel to be copied

: Copy the channel’s configuration to another channel

xx = indication of “Other channel number” using keys

: Validation of copy

→

Copy channel

[Channel xx => xx]

ND OF MENU

Page 30

ENMET Corporation MX52 C

ENTER

+→+→+→+

ENTER

5.4.7 Block Diagram of Programming Control Unit

NORMAL

DISPLAY

ONTROL

++ +

Programming

Unit

ENTER

Programming

[Unit]

Language

[English]

Validation of menu

Choice of languages: : French, English, German, Spanish

→+→

then

Speed

[96

]



Slave address

[1]

Continued On Next Page

Choice of transmission speed with computer: 12 24 48 96 192 Bauds

then

Choice of slave address (this unit)  to 25

→

then

Page 31

MX52 C

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

←

ENTER

ONTROL

ENMET Corporation

Continued From Previous Page

Response time

[00:00:05]

HH: mn : sec

Relay 1&2 stop T

[00:00:05]

HH: mn : sec

Relay safety

[Negative]

Buzzer transferred

[NO]

This is the time interval between exceeding of the AL threshold and triggering of the corresponding visual alarm (LED). Display the time using keys:touches

→

→ then

→

In “Parking” mode: this is the time interval between stopping of relay 1 and starting up of relay 2. Display the time using keys:

→

Negative Positive

Control of relay 3 (common) by any triggering of buzzer NO YES

Buzzer connected

[Yes]

Continuous buzzer

[Yes]

ND OF MENU

Utilization of common audio alarm (buzzer)? (Function in series with buzzer jumper) NO YES

→ then

→

YES = Continuous sound NO = Discontinuous sound NO YES

→

Page 32

ENMET Corporation MX52 C

5.4.8 Block Diagram of Reprogramming Programming

NORMAL

DISPLAY

ONTROL

++ + +

Programming

Display of menu

Uploading

ENTER

Validation of utilization of menu

Programming

[Uploading]

Uploading

Confirm

Display of menu confirmation

Data transfer request

Validation of data transfers

ENTER

Uploading [Confirm]

ND OF MENU

Confirmation of uploading

Page 33

MX52 C

ONTROL

ENMET Corporation

5.5 Startup of the MX52 C

ARNING

The handling operations and adjustments described in this section must be performed by authorized

ONTROL

personnel only, as they are liable to affect detection safety.

Once the control has been switched on, it can be programmed, the channels can be programmed according to the sensor/transmitter used, and the control and sensor/transmitter can be calibrated. The programming operations can be carried out directly on the MX52 C with the “

COM

52” software.

ONTROL

according to the following procedures, or by using a computer equipped

5.5.1 Programming the Control

To program the MX52 C conjunction with the keypad and the “Programming” switch. Then, the instructions in the menu should be followed carefully.

OTE

: If the control is left in the programming mode for more than 30 minutes, it automatically switches to fault mode.

ONTROL

the “Unit programming” menu must be used (see Section 5.4 on Menus) in

5.5.2 Programming the Channels

•

• Programming

••

To program each channel according to the type of sensor/transmitter used, the “Channel programming” menu must be used (see Section 5.4 on Menus) in conjunction with the keypad and the “Programming” switch. Then, the menu instructions should be followed carefully.

When a channel is switched on, all its relays are in “off” mode and its current output is 1 mA. One minute later, the channel comes into effective operation, with relays ready and output of 4-20 mA.

OTE

: If the control is left in the programming mode for more than 30 minutes, it automatically switches to fault mode.

•

• Copy

••

In order to make the programming of ALL CHANNELS less TIME-CONSUMING when the same programming is required for a number of channels, it is recommended that the “COPY” menu be used (see Section 5.4 on Menus) in conjunction with the keypad and the “Programming” switch. Then, the instructions in this menu should be followed carefully.

5.5.3 Calibrations

When it is first switched on, with the C carried out on both the C

ONTROL

Channel connected to a sensor/transmitter supplying a standard 4-20mA current.

Prepare the sensor/transmitter for calibration:

 Set the zero and gain of the sensor/transmitter according to the instructions furnished with that device.

OTE

: When the sensor/transmitter and C

should be in normal operating mode, but the MX52 C

inhibit the relays. Note that with ENMET sensor/transmitters there are two ways of checking the signal supplied to the control:

 By direct reading on the sensor/transmitter display.  By using a milliammeter to measure the current on the terminals provided for that purpose (see the manual for

the sensor/transmitter concerned). Adjust the sensor/transmitter zero: If the ambient air is not pure, use air from a cylinder. When the signal is stable,

adjust the sensor/transmitter zero current output to 4 mA.

Prepare the MX52 C

Adjustment of the MX52 C

1. First adjust MX52 C

ONTROL

for calibration:

for the channel (Item A, Figure 11) read ZERO on the MX52 display.

2. Second adjust the MX52 C

ONTROL

corresponding 4 mA potentiometer: (Item B, Figure 11).

This current is read by connecting a digital miltimeter directly to the corresponding current output (see Figure 12).

ONTROL

and channels programmed, CALIBRATING operations must be

and the Sensor/Transmitters.

ONTROL

channel are calibrated at the same time. The sensor/transmitter

ONTROL

should be set to calibration mode in order to

potentiometers affect the other settings, so adjust them in the order listed.

display to zero, adjust the Control channel zero by using on the ZERO potentiometer

zero current output, adjust the 4-20mA current output to 4 mA by using the

Page 34

ENMET Corporation MX52 C

Calibrate the sensor/transmitter:

 Adjust the sensor/transmitter gain.  Apply appropriate calibration gas to the sensor.

When signal has stabilized, set the sensor/transmitter gain according to the instructions furnished with that device

Calibrate the MX52 C

3. Third match the MX52 C

ONTROL

display to the S/T display, set the value of the calibration gas on the MX52

display panel by using the channel sensitivity potentiometer (Item A, Figure 11).

4. Finally set the MX52 C

ONTROL

current to the calibration output, adjust the current output by using the 20 mA

potentiometer to the appropriate output for the calibration gas being used (Item B, Figure 11).

Example of calibration current output: For a channel with a scale of 0 – 100 ppm:

If 100ppm gas is used to calibrate the S/T, the calibration current output should be set to 20mA If 50ppm gas is used to calibrate the S/T, the calibration current output should be set to 12mA

ONTROL

Conclude Calibration of the MX52 C

ONTROL

 Stop the injection of calibration gas, wait for the measurement to return to zero (on the MX52 display panel).

Then, press the “CALIBRATION” key (Item C, Figure 10). The flashing yellow LED goes out and the “C” on

the display panel disappears. The channel now operates normally and calibration has been completed.

Figure 11: Potentiometer Layout on Front of Channel Board

Page 35

MX52 C

+ +

–

– –

–

+ +

–

– –

–

6.0 Maintenance

6.0 Maintenance6.0 Maintenance

ONTROL

ARNING

The handling operations and adjustments described in this section must be performed by authorized

personnel, as they affect detection safety.

6.1 Periodic / Preventive Maintenance

ENMET Corporation

6.1.1 On the MX52 C

The MX52 C available on the MX52 C

Check the functions of the control as follows:

 Use the TEST switch to check the correct operation of all the LEDs and the buzzer.  Use the “SIMULATION” menu to check the correct operation of the display panel, the triggering of alarms

 Cause a fault to occur (such as a line fault by disconnecting a detector wire) to check the correct operation of

ONTROL

(LED and relays), the auxiliary devices and the 4-20 mA current output.

the fault indications.

ONTROL

requires a small amount of maintenance. However, it is recommended that the test functions

ONTROL

unit be used to regularly test the essential functions of the control.

6.1.2 On the Sensor/Transmitters

Sensor/transmitters must be calibrated periodically according to instructions furnished with those units.

Figure 12: Channel Board, Outputs on Rear Connector

Page 36

ENMET Corporation MX52 C

6.2 Troubleshooting: Symptoms and Remedies

OTE

: ENMET and our representatives and distributors are available to supply you with calibration gas or a

maintenance contract.

YMPTOMS

AUSES

EMEDIES

ONTROL

Display channel not lighted and no indicator lights on.

Fault indicator light on (in steady mode).

Fault indicator light on (in steady mode) and SUP displayed.

Continued on next page

On/Off switch in the Off position. Set the switch to the On position

(item A, Fig. 10). Problem with AC supply or DC power supply (24 V DC).

Check the supply voltages and, if

necessary, check the electric power

supply circuit breakers. Mains fuses blown. Replace the mains fuses (see item

A, Fig. 5). DC power (24 V DC) input fuses

blown.

Replace the 24 V DC fuses located

at the back of the MX52 unit (item

B, Fig. 5). +24 V DC internal protection fuse blown.

AUTION

Replace the +24 V DC fuse located

on the power board (item C, Fig. 5).

When replacing a fuse, use the required type and rating.

Faulty electrical connections on the 4-20mA sensor/transmitter wiring

Check the connections on the MX52

terminal block and the S/T terminal

block. Check that there is no short

circuit or break in the 4-20mA. Faulty sensor/transmitter. Repair or replace the S/T. The type of S/T does not match the channel configuration.

Connect the correct type of S/T with

the corresponding channel.

CAUTION

The channel or wiring may be

damaged. Negative offset too great (more than 20% of measuring scale).

Perform calibration on the S/T and,

then, on the control, if necessary. If

the problem persists, the sensor

must be replaced. Channel in maintenance mode for more than 30 minutes.

Return the channel to normal

operation by pressing the

Calibration key (Item C, Fig. 10). The measurement is higher than 100% of the measuring scale.

To acknowledge the alarm, the

channel must be switched off and

then switched on again (by

programming).

If the problem persists and the

measurement is not consistent with

reality, the S/T must be calibrated.

Page 37

MX52 C

ONTROL

Continued from previous page

ENMET Corporation

An LED does not light up even though the corresponding threshold is exceeded and the buzzer and relay are actuated.

An alarm is triggered, the LED lights up and the relay is actuated but there is no audio alarm.

The audio alarm stops after 30 s although alarms are still actuated.

An alarm is triggered but the auxiliary devices are not actuated.

Faulty LED. Perform a general test on the LEDs

by pressing the TEST switch on

the keypad (Figure 10) and, if the

LED still does not light up, the

programming must be modified by

using the “Unit programming”

menu (buzzer connected). The buzzer switch is not correctly positioned.

The buzzer is not programmed as “in service”.

Position the buzzer switch correctly

(item F, Figure 10).

If the audio alarm is wanted, the

programming must be modified by

using the “unit programming” menu

(buzzer connected?). The buzzer is programmed to operate for 30 seconds only.

If the buzzer is to be sounded as

long as the alarms are actuated, the

programming must be modified by

using the “Unit programming

menu” (continuous buzzer?). The relays are faulty. Short-circuit or open the relay

contact (as applicable) on the MX52

terminal block (Figure 12) and, if

the auxiliary devices operate

normally, the corresponding

channel board must be repaired by

an approved technician.

Remote acknowledgement is impossible.

Faulty electrical connections. Short-circuit or open the relay

contact (as applicable) on the MX52

terminal block (Figure 12) and, if

the auxiliary devices still do not

work, the connections must be

checked on the MX52 connector

and on the auxiliary devices.

Faulty electric connections. Check the connections on the MX52

connector (item B, Figure 9) and on

the pushbutton switch. The pushbutton switch is faulty. Replace the pushbutton switch.

Page 38

ENMET Corporation MX52 C

7.0 WARRANTY

7.0 WARRANTY7.0 WARRANTY

ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to ENMET within the warranty period (transportation prepaid) for inspection. If the evaluation by ENMET confirms that the product is defective, it will be repaired or replaced at no charge, within the stated limitations, and returned prepaid to any location in the United States by the most economical means, e.g. Surface UPS/RPS. If an expedient means of transportation is requested during the warranty period, the customer is responsible for the difference between the most economical means and the expedient mode. ENMET shall not be liable for any loss or damage caused by the improper use of the product. The purchaser indemnifies and saves harmless the company with respect to any loss or damages that may arise through the use by the purchaser or others of this equipment.

This warranty is expressly given in lieu of all other warranties, either expressed or implied, including that of merchantability, and all other obligations or liabilities of ENMET which may arise in connection with this equipment. ENMET neither assumes nor authorizes any representative or other person to assume for it any obligation or liability other than that which is set forth herein.

ONTROL

OTE

: When returning an instrument to the factory for service:

 Be sure to include paperwork.  A purchase order, return address and telephone number will assist in the expedient repair and return of your unit.  Include any specific instructions.  For warranty service, include date of purchase  If you require an estimate, please contact ENMET Corporation.

There are Return for Repair Instructions and Form on the last pages of this manual. This Form can be copied or used as needed.

Page 39

MX52 C

←

ENTER

Appendix A: List of Units

Appendix A: List of UnitsAppendix A: List of Units

ONTROL

YMBOL

LEL Lower Explosive Limit % Percent ppm parts per million ppb parts per billion UEG Unter Explosion Grenze (= LEL in German) LEL Limite inférieure d’explosivité (= LEL in French) bar unit of pressure mb unit of pressure (millibar) Rh relative humidity m/s metres per second mg unit of weight (milligram) unit + flashing U free indication of unit

ESCRIPTION

ENMET Corporation

Replacement Part Numbers

ENMET replacement part numbers:

ESCRIPTION

Channel Board, controls 2 channels 02625-001 Micro Board 02625-002 – Verify before ordering

Micro Board, with Galvanic Isolation 02625-003 – Verify before ordering

Power Supply 67052-132

→

ART NUMBER

then

See page 9 – 10

Page 40

ENMET Corporation MX52 C

←

ENTER

Appendix B: List of Gases

Appendix B: List of GasesAppendix B: List of Gases

YMBOL

CH4 Methane CO Carbon monoxide H2S Hydrogen sulphide N Nitrogen NO Nitric oxide NO2 Nitrogen dioxide SO2 Sulphur dioxide CI2 Chlorine H2 Hydrogen HCL Hydrochloric acid HCN Hydrocyanic acid NH3 Ammonia ETO Ethylene oxide PH3 Phosphine HF Hydrofluoric acid CFC Freons CO2 Carbon dioxide ASH Arsine SiH4 Silane BUT Butane PRO Propane GNT Natural gas ETY Ethylene PNT Pentane HEX Hexane PRY Propylene ACY Acetylene ETA Ethanol ACO Acetone OPR Propylene oxide OET Ethylene oxide ISB Isobutane DIM Dichloromethane AET Ethyl alcohol BUN 2-Butanol ISP Isopropanol XYL Xylene TOL Toluene ESS Petrol (gasoline) BUD Butadiene HYD Hydrogen

Gas + flashing U Free indication of name of gas:

ESCRIPTION

ONTROL

→

then

Page 41

PO Box 979 680 Fairfield Court Ann Arbor, Michigan 48106-0979

734.761.1270 Fax 734.761.3220

Returning an Instrument for Repair

ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty service work.

When returning an instrument to the factory or service center for service, paperwork must be included which contains the following information:

 A purchase order number or reference number.  A contact name with return address, telephone and fax numbers  Specific instructions regarding desired service or description

of the problems being encountered.

 Date of original purchase and copy of packing slip or invoice

for warranty consideration.

 If a price estimate is required, please note it accordingly and be

sure to include a fax number.

Providing the above information assists in the expedient repair and return of your unit.

Failure to provide this information can result in processing delays.

ENMET charges a one hour minimum billing for all approved repairs with additional time billed to the closest tenth of an hour. All instruments sent to ENMET are subject to a minimum $30 evaluation fee, even if returned unrepaired. Unclaimed instruments that ENMET has received without appropriate paperwork or attempts to advise repair costs that have been unanswered, after a period of 60 days, may be disposed of or returned unrepaired COD with the evaluation fee.

Service centers may have different rates or terms. Be sure to contact them for this information.

Repaired instruments are returned by UPS/FedEx Ground and are not insured unless otherwise specified. If expedited shipping methods or insurance is required, it must be stated in your paperwork.

Note: Warranty of customer installed components.

If a component is purchased and installed in the field, and fails within the warranty term, it can be returned to ENMET and will be replaced, free of charge, per ENMET’s returned goods procedure.

If the entire instrument is returned to ENMET Corporation with the defective item installed, the item will be replaced at no cost, but the instrument will be subject to labor charges at half of the standard rate.

Page 42

Page 43

Repair Return Form

Mailing Address:

ENMET Corporation PO Box 979 Ann Arbor, Michigan 48106

Phone Number: 734.761.1270 FAX Number: 734.761.3220

Your Mailing Address: Your Shipping Address:

Contact Name: __________________________ Your Phone: _______________________ Your PO/Reference Number: _______________ Your FAX: _______________________

Shipping Address:

ENMET Corporation Attn: Repair Department 680 Fairfield Court Ann Arbor, Michigan 48108

Payment Terms: K COD

(Check one) K VISA / MasterCard______________________ ________

Card number Expiration

Return Shipping Method:

K UPS: K Ground K 3 Day Select K Next Day Air K ND Air Saver K 2-Day Air K Federal Express: K Ground K Express Saver K P-1 K Standard K 2-Day Air K FedEx Account number: ________________________

Would you like ENMET to insure the return shipment?

K No K Yes Insurance Amount: $_________________

Page 44