ENMET EX-5155 User Manual

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Page 1

ENMET Corporation

PO Box 979 Ann Arbor, MI 48106-0979

www.enmet.com

EX-5155-MOS

Toxic Gas

Sensor/Transmitter

Manual

Manual Part Number 80003-098 MCN-13-011, 12/20/13

Page 2

Table of Contents

1.0 I

NTRODUCTION

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

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

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

2.0 F

EATURES OF THE

3.0 I

NSTALLATION OF THE

3.1 Mounting the EX-5155-MOS Enclosure ........................................................................................................................... 3

3.2 Wiring the EX-5155-MOS to a Control Unit ..................................................................................................................... 4

4.0 O

PERATION OF THE

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

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

4.1.2 Alternate Start Up ........................................................................................................................................................................... 6

4.1.3 Purge .............................................................................................................................................................................................. 6

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

4.2.1 Alarm Conditions EX-5155-MOS ................................................................................................................................................. 7

5.0 M

AINTENANCE OF THE

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

5.2 Calibration of the EX-5155-MOS ...................................................................................................................................... 9

5.2.1 Zero Adjust.................................................................................................................................................................................... 11

5.2.2 Gas Span ....................................................................................................................................................................................... 11

5.2.3 Exit Maintenance Menu ................................................................................................................................................................ 11

5.3 Heater Voltage Settings ................................................................................................................................................... 13

5.4 Sensor Replacement ......................................................................................................................................................... 13

6.0 R

EPLACEMENT PART NUMBERS

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

DDENDUM: AMMONIA CALIBRATION

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

EX-5155-MOS .......................................................................................................................... 2

EX-5155-MOS .................................................................................................................... 3

EX-5155-MOS ........................................................................................................................ 6

EX-5155-MOS .................................................................................................................... 8

............................................................................................................................ 14

.......................................................................................................................... 15

List of Figures and Tables

Figure 1: EX-5155-MOS Features ............................................................................................................................. 2

Figure 2: EX-5155-MOS Mounting Dimensions ......................................................................................................... 3

Figure 3: Terminal Positions EX-5155-MOS Sensor/Transmitter .............................................................................. 5

Table 1: EX-5155-MOS maintenance Menus Sequence ........................................................................................... 8

Figure 4: Calibration Adapter EX-5155-MOS Sensor/Transmitter ............................................................................. 9

Table 3: Examples of Standard and Non-Standard Calibration Gas ....................................................................... 10

Table 2: Calibration Time ......................................................................................................................................... 11

Figure 5: EX-5155-MOS Maintenance Menu Flow chart ......................................................................................... 13

Figure 6: Sensor Replacement ................................................................................................................................ 13

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.]

Page 3

EX-5155-MOS ENMET Corporation

1.0 Introduction

The ENMET EX-5155-MOS sensor/transmitters (S/T) is a 3-wire, 24 VDC 4-20mA S/T for the detection of toxic gas, utilizing a Metal Oxide Semiconductor (MOS) sensor. The EX-5155-MOS is meant to be used in conjunction with an appropriate power supply and controller. The ENMET EX-5155-MOS sensor/transmitter has been designed and approved to be used in a Class I, Div. 1, Groups B, C, D, classified areas. The approval was issued by CSA International.

OTE

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

1.1 Unpack

Unpack the EX-5155-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

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-5155-MOS is received as ordered. [Each EX-5155-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-5155-MOS is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.

Page 4

EX-5155-MOS ENMET Corporation

T 3

See Note

POT 2

Note:

3 Alarm

Power /Fault

Magnetic switch

2.0 Features of the EX-5155-MOS

See Figure 1 for location of features:

Feature Description Display

Gain Potentiometer (POT)

Visual Alarms

Magnetic Switches

Sensor

LCD: Indicates the level of gas detected by sensor POT 1: Display contrast adjustment

POT 2: Does Not apply to MOS, not used Do not adjust POT 3: Does Not apply to MOS, not used Do not adjust POT 4: MOS Heater Voltage, Do not adjust unless advised by ENMET

LED indicators:

Power / Fault Indicator LED, Green / Red Alarm (3) Indicator Red LED, user adjustable

ENU

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

ELECT

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

For sensing gas at

PPM

or LEL levels, see Table 3 for sensor types

Magnetic switches control the instrument maintenance functions. The switch locations are indicated by M

ENU

and S

magnetic field pulse is applied by momentarily putting the end of the magnet in proximity to the switch and then removing it. Referred to as tap. Since the magnetic field penetrates the window, the enclosure cover is not removed in order to perform calibration.

Three alarm points are preprogrammed into the EX-5155-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.

POT 1

Indicator

Indicators

Display

See Note

POT 4

ENU

Magnetic switch

Select

Internal PCB View

Sensor

POT 2 and POT 3 are not

ELECT

used with EX-5155 MOS Do Not Adjust

ELECT

. A

External View

Figure 1: EX-5155-MOS Features

Page 5

EX-5155-MOS ENMET Corporation

Mounting Holes

Sensor/Transmitter

3.0 Installation of the EX-5155-MOS

AUTION

3.1 Mounting the EX-5155-MOS Enclosure

AUTION

Area must be declassified during installation.

The ENMET EX-5155-MOS gas sensor/transmitter (S/T) is a 3-wire, 24 VDC, 4-20 mA S/T for the detection of toxic gas. The S/T is meant to be used in conjunction with an appropriate power supply and controller. The ENMET EX-5155-MOS sensor/transmitter has been designed and approved to be used in a Class I, Div. 1, Groups B, C, D, classified areas. The approval was issued by CSA International. Appropriate wiring, conduit and fittings are required for proper installation in a explosion proof rated environment.

: Since the sensor/transmitter detects gas only at the sensor location, pay attention to the possible sources of gas, the

density of the gas, locations where the gas may be confined and locations where the gas may damage or injure property or personnel, when choosing locations of sensor/transmitters. Also, take into consideration environmental factors when deciding on S/T location. Avoid locations where the S/T may be damaged by liquid immersion, excessive heat or other know hazards. Also, take precautions to insure condensation inside of the conduit does not enter the S/T.

Mount the enclosure, using the two mounting holes provided see Figure 2. Pay particular attention to the source and density of the gas being detected when choosing the location. Mount the S/T near the ceiling for lighter than air gases /vapors and near the floor for heavier then air gas/vapors. Contact ENMET if you have questions regarding your application.

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

sensitive components.

Optional Conduit fitting Typically: ½″ NPT female

Sensor

½″ NPT female

2 places, 0.313″

Sel

Enclosure Top View

Enclosure Side View

Sensor

Figure 2: EX-5155-MOS Mounting Dimensions

Page 6

EX-5155-MOS ENMET Corporation

Wires to

3.2 Wiring the EX-5155-MOS to a Control Unit

AUTION

*Contact ENMET for Modbus address information

Area must be declassified during installation.

Run conduit and 16

AWG

(1.5

) wires to the enclosure from the power supply and controller. If the EX-5155-MOS is

installed in a hazardous location as defined by the National Electrical Code, then ALL wiring must be in accordance with the National code and any local governing codes.

Open the enclosure, and remove the 2 screws that retain the display overlay to the circuit board. Use caution when removing the over lay. Do not damage the magnetic switches. Remove the two overlay standoffs and remove the circuit board, exposing the terminal strips on the bottom of the circuit board.

Do not disconnect the circuit board wiring. Connect the wires from the controller (power supply) to the supplied J4 plug then attach to J4 terminal. Connect the wires from the sensor to the supplied J8 plug then attach to the J8 terminal. See Figure 3 for locations

J4 P

LUG – TERMINAL TO CONTROLLER WIRING

Position Function

1 +

4* RS-485 D+ 5* RS-485 D–

24 V

power 2 GND 3 4 - 20 mA out

To J4

Plug J4

Controller

5 4 3 2 1

1 2 3

Circuit Board Bottom View

Page 7

EX-5155-MOS ENMET Corporation

Printed Circuit Board

Magnetic Switches

Sensor/Transmitter

Display Overlay Screws

(2 places)

Display Overlay Standoffs

Magnetic

Switches

Printed Circuit Board (PCB)

(2 places)

Display

Display Overlay

(2 places)

 J4 and J8 Terminals are located on the

bottom side of PCB

Enclosure Cutaway View

Display Overlay

(2 places)

Figure 3: Terminal Positions EX-5155-MOS Sensor/Transmitter

When wiring is complete, reassemble the magnetic switches. Put the cover back on the S/T

EX-5155-MOS

(PCB)

. Use caution when installing the overlay so as not to damage the

Do Not

apply power to the S/T without the cover in place.

Page 8

EX-5155-MOS

EX-5155

MOS

C, F, P

5155

1256

0ppm

0ppmW

0ppmF

0ppmP

ENMET Corporation

4.0 Operation of the EX-5155-MOS

It is best to have the gas to them.

When 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. See the Section 4.1.2 below.

EX-5155-MOS

4.1 Start up

4.1.1 Typical Start Up

When power is supplied to the

OTE

Software revision may cause variations of display output.

Example of Display Function

The instrument: Serial Number

EX-5155-MOS

transmitter is first powered up, it goes through a series of momentary screens, which identify the

transmitters powered up and operational for 24 hours before applying calibration or test

EX-5155-MOS,

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

The instrument: Model Note MOS is not displayed

The instrument: Software Revision

the right most character is a flashing

For Toxic Gas

the right most character is a flashing

S/W X.X

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

See Section 4.1.2

4.1.2 Alternate Start Up

Depending on 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

the right most

character is a flashing C

the right most

character is a flashing F

the right most

character is a flashing P

the right most

character is a flashing R

EX-5155-MOS

S/T configuration and calibration condition, the furthest right character in the display may flash

The last calibration of the instrument was invalid

0ppmC

0ppmR



The instrument must be recalibrated

There is a sensor fault

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

The instrument is in Recovery mode after completing the purge cycle



This should take about 5 minutes

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 sensor purging requirements.

EX-5155-MOS

S/T is configured at the factory for the installed

Page 9

EX-5155-MOS

ENMET Corporation

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 of time.

To initiate a purge:

See

Figure 5

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

for the Operational portion of the Maintenance Menu Flow Chart.

4.2 Normal Display Mode

When the and the information on the display is measurement of the target gas detected by the LEDs are not lit.

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

OTE

See sequence of operational information below:

Display Measurement of the target gas Tap the magnet over the

Display indicates Alarm 1 Set point Tap the magnet over the

Display indicates Alarm 2 Set point Tap the magnet over the

Display indicates Alarm 3 Set point Tap the magnet over the

Display indicates mA Span range (Full Scale)

Tap the magnet over the

Display returns to gas measurement

EX-5155-MOS

Software revision may cause variations of display output.

is installed as described in section 3, and in clean air, the

ENU

button

0PPM

ENU

button

A1: 10

ENU

button

A2: 20

ENU

button

A3: 50

mA: 100

ENU

button

SELECT

POWER

EX-5155-MOS.

ENU

button.

No Function for the

green LED is on, the display is lit

The red alarm and fault

ELECT

button

in this mode

Operational Display Flow Chart

4.2.1 Alarm Conditions EX-5155-MOS

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.

Page 10

EX-5155-MOS

5ppm

Exit

ENMET Corporation

5.0 Maintenance of the EX-5155-MOS

AUTION

5.1 Maintenance Menu

Do not open the

: Do Not Attempt A Span Procedure Without Calibration Gas Applied to The Sensor

EX-5155-MOS

S/T

in a classified area.

; if this is done, the S/T is forced

into a calibration fault mode.

Magnetic switches control the display panel, see

Figure 3.

numbers such as alarm points, calibrations gas, etc. The

The

and

ELECT

functions. The

ENU

switch is used to display the various menu options and make incremental changes to

ELECT

ENU

and

ELECT

switch locations are indicated on the

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

ELECT

boxes on the front panel.

To enter the maintenance menu hold the magnet over the

Table 1

indicates the maintenance menu sequence see

ENU

Figure 5

switch for 2 to 4 seconds for a detailed maintenance menu flow chart.

Table 1: EX-5155-MOS maintenance Menus Sequence

Example of Display Function

Hold the magnet over

ENU

switch for 2 – 5 seconds to enter the Maintenance Menu

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

Tap the magnet over the

ENU

switch to advance to the Zero procedure

Zero

Normal Display Mode

Measurement of target gas

EX-5155-MOS

is in Maintenance Mode

To exit the maintenance Menu and return to the Normal Display Mode:

If intended function Tap the magnet over

For adjusting Zero: If intended function Tap the magnet over

ELECT

switch

ENU

and

Tap the magnet over the

ENU

switch to advance to the Span procedure

Span

For adjusting the Span: If intended function Tap the magnet over

Tap the magnet over the

Alarm1

ENU

switch to advance to each Alarm set point procedures

Alarm2

For adjusting the Alarm 1, 2 and 3 set points: If Intended function Tap the magnet over

Alarm3

Tap the magnet over the

Taping the You must Tap the

OTE

ENU

switch without taping the

ELECT

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

ENU

switch to advance the mA Span set point procedure

For adjusting the mA Span set point:

mA Span

If intended function Tap the magnet over

ELECT

switch will allow you to cycle through the menu options.

switch in order to change the desired operation.

ELECT

switch

Page 11

EX-5155-MOS

Output, for Gas

Input, for Calibration

ENMET Corporation

5.2 Calibration of the EX-5155-MOS

Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. The Zero function sets the clean air reference point and the Span function sets the sensitivity of the instrument.

Initial Calibration:

calibration. The S/T has been pre-calibrated at the factory, and initial field calibration should result in only fine tuning to circuit, as well as a way to check that installation is successful. It is not necessary to open the enclosure to make adjustment. The calibration functions are operated with magnets from outside the enclosure through the Not open the S/T unless the area is de-classified.

Calibration Zero and Span functions are two separate procedures. They operate independently of each other. It is recommended that the Zero procedure be done prior to the Span procedure. quarterly calibration of the

Calibration equipment is available from calibration adapter will have a fitting for the gas cylinder on one side, and a cover to go over the sensor housing on the other.

Generally, a cylinder of 20.9% Oxygen is used to provide a fresh air reference or Zero point for the calibration. Another cylinder is used to provide the Span reference point for calibration. Depending on the instrument calibration, the Span gas may be the same gas that the instrument is calibrated to display, or it may be another gas, which response.

Sensors require a humidified calibration gas sample. Fill the humidifier bowl, half way up with clean fresh water prior to attaching the Zero or Span gases. Be careful not to let the humidifier bowl tip, allowing water to enter the gas delivery tubing.

See

Table 3

Wait 24 hours after initially supplying power to the

EX-5155-MOS

transmitters.

ENMET

Corporation to calibrate the

for standard and Non-standard calibration gases.

EX-5155-MOS

ENMET

Corporation recommends at least

EX-5155-MOS

sensor/transmitter (S/T) before initial

and

SELECT

switches. Do

sensor/transmitters. A

ENMET

has found to have a similar

Select

TO C

AL COVER

& S

ENSOR

Humidifier Top View

OTE

: Gas flow is opposite to arrow on humidifier

Figure 4: Calibration Adapter EX-5155-MOS Sensor/Transmitter

ROM

EGULATOR &

AS CYLINDER

Calibration Cover

or Optional Gas Sampling

Regulator

Gas Cylinder

Page 12

EX-5155-MOS

ENMET Corporation

Table 3: Examples of Standard and Non-Standard Calibration Gas

Gas Range Alarm 1* Alarm 2* Alarm 3*

Sensor

Part Number

Span

Calibration Gas

Calibration

Point

Gas Type/ Standard

Methyl Chloride

Carbon Monoxide

Hydrogen Sulfide

Hydrogen

0 – 400 PPM

0 – 100 PPM

0 – 1000 PPM

100 PPM 200 PPM 300 PPM 03015-000

35 PPM 50 PPM 100 PPM 03011-000

10 PPM 20 PPM 50 PPM 03015-000

200 PPM 500 PPM 800 PPM 03016-000 800 PPM Hydrogen 800 PPM Hydrogen

100 PPM Methyl Chloride

100 PPM Carbon Monoxide

100 PPM Methyl Chloride

100 PPM Carbon Monoxide

20 PPM Hydrogen Sulfide

Gas Type/ Non – Standard Considered Special Calibrations, use for examples only. Consult ENMET for specifications and availability.

Ammonia

Freon 134A

Freon 12

Freon 22

Acetone

Methylene Chloride

OTE

These internal sensor/transmitter alarms are independent of the 4-20mA Controller alarm point settings.

0 – 300 PPM

0 – 2000 PPM

0 – 200 PPM

150 PPM 300 PPM 300 PPM 03019-000 300 PPM Ammonia

500 PPM 1000 PPM 1500 PPM 03032-000 2% LEL Methane 1200 PPM Freon 134

500 PPM 1000 PPM 1500 PPM 03032-000

500 PPM 1000 PPM 1500 PPM 03032-000 2% LEL Methane 730 PPM Freon 22

500 PPM 750 PPM 1000 PPM 03016-000 500 PPM Hydrogen 1150 PPM Acetone

25 PPM 50 PPM 100 PPM 03015-000

300 PPM Carbon Monoxide

100 PPM Methyl Chloride

See Addendum Ammonia Calibration

1200 PPM Freon 12

140 PPM Methylene Chloride

Page 13

EX-5155-MOS

Sensor Type

Calibration Gas Concentration

Calibration Gas Application Time

ENMET Corporation

5.2.1 Zero Adjust

A ZERO function should be performed only when the sensor is in question, use a cylinder of 20.9% oxygen to provide a clean air reference. Attach the cylinder to the calibration adapter, fill the humidifier bowl halfway with water and allow gas to flow over the sensor for 3 – 4 minutes.

Enter the maintenance menu by placing the magnet over Maintenance Menu flow chart.

The second menu available is the Zero. Tap the

ELECT

switch to perform a Zero.

 If the Zero is successful

, Cal OK appears on the display and in 1 – 2 seconds, display will change to Span.

If you wish to Span the sensor Tap the

ELECT

If you wish to Exit the maintenance menu, Tap instrument Normal Gas Display

 If the Zero is Not successful,

sensor is outside of safe parameters to be zeroed, the display will read Bad Zero. Repeat

Section 5.2.1 Zero Adjust making sure to use a cylinder of 20.9% Oxygen.

EX-5155-MOS

ENU

switch for 2 to 4 seconds. See

sensor/transmitter is exposed to fresh air. If the air at the

switch you are now ready to apply gas.

ENU

switch until Exit is displayed, then tap

Figure 5, EX-5155-MOS

Proceed to gas span step 2

ELECT

switch to return to the

5.2.2 Gas Span

It is recommended that the Zero Function be performed first.

Enter the maintenance menu. See

Tap the Tap the

ENU

switch once to show Span on the display.

ELECT

switch to perform a Span procedure. The display will alternate between the calibration gas concentration

Figure 5, EX-5155-MOS

and a signal level.

OTE

You can change the Calibration Gas Level. H

The M

ENU

The S

Attach the associated calibration gas cylinder to the regulator and calibration cover. See to

Open the valve to apply the calibration gas to the sensor.

Watch for the signal level to stabilize. Refer to

Once the signal level has stabilized, the



If the Span is successful, Cal OK appears on the display momentarily, then advances to Alarm 1. Remove calibration gas. To exit maintenance menu tap the

switch changes digit indicated by underscore cursor

ELECT

switch locks underscored digit and moves to next digit

EX-5155-MOS

ENU

OLD

Table 4

switch until Exit appears, then tap the

Maintenance Menu flow chart.

the magnet over the S

ELECT

switch for 2 – 4 seconds

Figure 3

for typical response times.

will automatically lock in the calibration data and:

ELECT

switch.



If the sensor is outside of acceptable parameters, Bad Span is displayed momentarily, then returns to Span. Remove calibration gas. Tap the repeat calibration in 30 – 60 minutes.



If the sensor did not respond to gas, Same mV is displayed momentarily, then returns to Span.



Remove calibration gas, tap the again in 30-60 minutes. If the sensor will not calibrate See Section 5.4.

 N

OTE

Some software revisions require the

Calibration is complete.

MOS PPM

5.2.3 Exit Maintenance Menu

Exit maintenance, by tapping on the instrument Normal Gas Display.

ENU

switch until Exit appears, then tap the

ENU

switch until Exit appears, then tap the

ELECT

switch be tapped to accept the signal.

Table 2: Calibration Time

3 – 4

minutes

ENU

switch until Exit appears on the display. Tap the

ELECT

switch. Check span gas and

ELECT

switch and try calibration

ELECT

switch to return to the

Page 14

EX-5155-MOS

MOS will

Apply

Bad Sens

Select

SetTD

sec

Alarm1

Normal Display Mode

5ppm

OLD the magnet over the MENU switch for 2 – 4 seconds

to enter the Maintenance Menus

ENMET Corporation

Exit

SELECT

Tap the

ELECT switch to return to the Normal

Display Mode. See Section 5.2.3

Tap the magnet over the MENU switch to cycle through Maintenance Menus

Zero

SELECT

PV: 0

Cal OK

Bad ZERO

SELECT

Tap the SELECT switch to initiate Zero adjustment

the Zero signal is within Preset Specs the EX-5155-MOS will

display Cal OK, See Section 5.2.1

If the Zero signal is not within Preset Specs the EX-5155-

display Bad ZERO

NOTE: Some software revisions require the SELECT switch be

tapped to accept the signal.

Span

SELECT

PV: 0

SELECT

Cal OK

NOTE: You can change the Calibration Gas Level.

SELECT

The MENU switch changes digit indicated by underscore cursor The SELECT switch locks underscored digit and moves to next digit

HOLD the magnet over the SELECT switch

See Section 5.2.2

Calibration Gas until signal value becomes

stable (about 1 to 4 minutes) See Figure 4

Same mV

If cal is good display will indicate OK or Same If cal is not within preset “range” display will

indicate Bad Sens

NOTE: Some software revisions require the SELECT switch

be tapped to accept the signal.

SELECT

Alarm2

SELECT

Alarm3

SELECT

Figure 5: Continued on next page

Λ 10

SetTDsec

Λ 50

SetTDsec

To change Alarm set points: Tap Menu switch until Alarm to be changed is displayed Tap Select switch to display the set point

The M

ENU

switch: changes digit indicated by underscore cursor The S

ELECT

switch: locks in the underscored digit and

moves to next digit

If change is not within range display returns to first digit If change is within range display moves to Set Time Delay

Use M

ENU

and S

ELECT

switches as above to change time

delay. Between 0 and 5 seconds is allowed If change is within range display moves to next menu

Λ - Indicates increasing alarm

V - Indicates decreasing alarm

Page 15

EX-5155-MOS

100

Set Screw

Sensor

Spacer

ENMET Corporation

mA Span

SELECT

return to Normal Gas Display:

To change mA Span set point: Tap the MENU switch until mA Span is displayed Tap the SELECT switch to display the set point

The MENU switch changes digit indicated by underscore cursor The SELECT switch locks underscored digit and moves to next digit

Tap MENU switch until EXIT is displayed Then tap SELECT switch

Figure 5: EX-5155-MOS Maintenance Menu Flow chart

5.3 Heater Voltage Settings

Heater Voltages are necessary for MOS sensors. They are preset at the factory and should not require field adjustment. Do not adjust these voltages unless specifically instructed to do so by

AUTION

Improper adjustment of heater voltages can damage sensors voiding any warranties and also alter the operating

characteristics of the sensor in such a way that the

ENMET

Corporation Technical Support Staff.

EX-5155-MOS

may not respond to it’s target gas.

5.4 Sensor Replacement

AUTION

Sensors should be replaced when they can no longer be calibrated. Replacement sensor part numbers are listed in Section 6.0 of this manual. If you do not know the proper part number for your sensor, be sure to have the available when contacting your Distributor or

To replace a sensor, it is not necessary to open the transmitter housing. Remove the set screw from sensor housing base. Unscrew the sensor housing cover and remove spacer. Unplug the sensor form PC Board. Plug new sensor into PC Board and replace spacer. Reassemble the sensor housing. After the new sensor has been installed, it is suggested to allow the sensor to stabilize for 24 hours.

A Factory calibration must be performed.

After entering the Maintenance menu, advance to the Zero menu. Then while viewing the Zero menu, hold the magnet over the

After 2-4 seconds, an F will appear on the far right hand side of the display. The F indicates that the instrument is in Factory mode.

Perform the calibration Zero and Span procedures as outlined in Section 5.2. Be sure that the F is present when selecting the Zero and Span functions.

The Factory calibration sets a calibration window for future standard instrument calibrations. Only perform a factory calibration when installing a new sensor!!

: Area must be declassified during sensor replacement.

ENU

switch for 2-4 seconds.

ENMET

(0.050 inch, 1.27mm Hex Key)

Corporation Technical Support.

Note the orientation of spacer

Replace spacer with grooved edge toward sensor housing cover

EX-5155-MOS

serial number

Sensor Housing Base

Note the orientation of spacer for replacement

Grooved edge of spacer toward Sensor Housing Cover

Sensor Housing Cover

P C Board

Figure 6: Sensor Replacement

Page 16

EX-5155-MOS

ENMET Corporation

6.0 Replacement Part Numbers

ENMET

replacement part numbers:

Description Part Number

For

EX-5155-MOS

Sensor 03015-000

Consult Regulator 03700-008

Overlay 06000-058 Magnet 50030-001 Calibration/Sampling Adapter 03700-034 Calibration Gas, Consult Regulator, Ammonia 03700-005

ENMET

p/n 10014-018

Distributor or

ENMET

Corp for additional sensors

Distributor or

03016-000 03018-000 03019-000

ENMET

Corp.

7.0 WARRANTY

ENMET

year from date of shipment from expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to

ENMET

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/FedEx Ground. 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. 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 nor authorizes any representative or other person to assume for it any obligation or liability other than that which is set forth herein.

NOTE: When returning an instrument to the factory for service:

    

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

Manual Part Number 80003-098

October 2007 MCN-399, 03/21/08 MCN-425, 11/10/09 MCN-462, 04/20/12 MCN-464, 05/10/12 MCN-13-011, 12/20/13

warrants new instruments to be free from defects in workmanship and material under normal use for a period of one

ENMET

within the warranty period (transportation prepaid) for inspection. If the evaluation by

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

. The warranty covers both parts and labor excluding instrument calibration and

ENMET

shall not be liable for any loss or damage caused by the improper use of

which may arise in connection with this equipment.

Corporation.

confirms that the

ENMET

neither assumes

Page 17

EX-5155-MOS

ENMET Corporation

Addendum: Ammonia Calibration

Calibration Procedure for EX-5155-MOSAmmonia

The

EX-5155-MOS

All

MOS

sensors require at least 15% RH for proper operation. RH of 50% or greater is ideal for common technique for humidifying dry gas from a cylinder is to bubble it through a humidifier assembly. However, ammonia is readily absorbed in water.

ENMET

water, but not bubble the gas sample. Instead the gas sample is passed over the water. It is still able to pick up enough humidity to properly calibrate the sensor, but not enough to lose all of the ammonia calibration gas.

For 0 – 500 ppm range Ammonia transmitters, the proper calibration gas cylinder is 300 ppm NH3 in air. While flowing the 300 ppm ammonia through the calibration adapter humidifier assembly,

going to the sensor

Place the the

Do Not

Open the valve on the calibration adapter regulator, and attach the calibration cup to the sensor. Verify that the gas sample is

Apply the calibration gas for four minutes. At the end of four minutes, use the magnet and The display will alternate between calibration gas and concentration. Tap the The display will read CAL OK if the calibration was successful. Fresh clean water must be used for each calibration.

Corporation has developed a special calibration adapter for ammonia that allows the humidifier bowl to be 1/3 full of

EX-5155-MOS

start the Span sequence.

passing over the water by looking for gentle ripples on the water surface and not bubbling. Flow rate is preset by the regulator and needs no adjustment.

ELECT

Ammonia sensor requires special calibration techniques that are not common with other gases.

MOS

sensor calibration. The

approximately 200 ppm is the actual concentration

, the difference being absorbed by the water surface.

unit into calibration mode reference

will be at SPAN.

TAP

the

switch again to exit Span operation.

Section 5.0

ELECT

switch to enter the Span operation.

. Following the Zero Calibration

Notes:

Page 18

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 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 19

Mailing Address:

Shipping Address:

Repair Return Form

ENMET Corporation PO Box 979 Ann Arbor, Michigan 48106

Phone Number: 734.761.1270 FAX Number: 734.761.3220

Your Mailing Address:

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

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

Your Shipping Address:

Payment Terms: K COD

(Check one) K VISA / MasterCard______________________ ________ ________

Card number Expiration Card Code

K American Express______________________ ________ ________

Card number Expiration Card Code

Name as it appears on the credit card___________________________________

Return Shipping Method:

K UPS: K Ground K 3 Day Select K Next Day Air K ND Air Saver K 2-Day Air K UPS Account number: ________________________

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: $_________________