ENMET MEDAIR 2200 User Manual

ENMET Corporation

PO Box 979
Ann Arbor, MI 48106-0979

www.enmet.com

M

EDAIR

2200

Operation and Maintenance

Manual

Manual part number
80002-042
MCN-13-009, 12/09/13

Table of Contents

1.0 I

NTRODUCTION

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

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

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

2.0 I

NSTRUMENT FEATURES

2.1 Exterior Features ................................................................................................................................................................. 2

2.2 Display Panel Features ........................................................................................................................................................ 2

2.3 Circuit Board Features ........................................................................................................................................................ 4

3.0 I

NSTALLATION

3.1 Mounting of Instrument ...................................................................................................................................................... 5

3.2 Sample Air Supply .............................................................................................................................................................. 6

3.3 Power Supply ...................................................................................................................................................................... 6

3.4 Outputs ................................................................................................................................................................................ 6

3.4.1 Relay Contacts ......................................................................................................................................................... 7

3.4.2 Optional 4-20mA Outputs ........................................................................................................................................ 8

3.5 Installation Verification....................................................................................................................................................... 8

4.0 O

PERATION

4.1 Normal Operation Condition ............................................................................................................................................... 9

4.2 Alarm Set Points ................................................................................................................................................................. 9

4.3 Alarm Latching or Differential Settings ............................................................................................................................ 10

4.4 Audio Defeat ..................................................................................................................................................................... 10

4.5 Display .............................................................................................................................................................................. 10

4.6 Operational Menu.............................................................................................................................................................. 11

4.7 Fault Indications ................................................................................................................................................................ 12

4.7.1 Low Flow Indication .............................................................................................................................................. 12

4.7.2 Other Fault Indications .......................................................................................................................................... 12

4.8 Dew Point Sensor Response .............................................................................................................................................. 12

4.9 Hydrocarbon Sensor Response .......................................................................................................................................... 12

5.0 M

AINTENANCE

5.1 Cleaning Instructions ........................................................................................................................................................ 13

5.2 Maintenance Menu ............................................................................................................................................................ 13

5.2.1 Accessing Maintenance Menu ................................................................................................................................ 13

5.2.2 Maintenance Menu Flow Chart .............................................................................................................................. 14

5.3 Calibration for CO, O

5.3.1A Low Cal/ZeroCal Adjust....................................................................................................................................... 16

5.3.1B High Cal/SpanGas Adjust .................................................................................................................................... 16

5.3.2 Set 4 –20mA Transmitter Scale .............................................................................................................................. 17

5.3.3 Set Alarm Points ..................................................................................................................................................... 18

5.3.4 Set Alarm Delay ..................................................................................................................................................... 20

5.3.5 Relay Configuration ............................................................................................................................................... 21

5.3.6 Failsafe Configuration ........................................................................................................................................... 22

5.3.7 Set Output Span Range ........................................................................................................................................... 22

5.3.8 Set New Password .................................................................................................................................................. 23

5.3.9 Exit Maintenance Menu .......................................................................................................................................... 23

5.4 Sensor Replacement .......................................................................................................................................................... 24

5.4.1 Oxygen / Gas Sensor .............................................................................................................................................. 24

5.4.2 Calibration/Sensor Replacement ............................................................................................................................ 24

5.4.3A Low Cal/ZeroCal Adjust....................................................................................................................................... 26

5.4.3B High Cal/SpanGas Adjust .................................................................................................................................... 26

5.5 Dew Point Sensor .............................................................................................................................................................. 27

5.6 Flow Control Orifice / Pre-filter ........................................................................................................................................ 27

6.0 T

ECHNICAL DATA AND SPECIFICATIONS

7.0 R

EPLACEMENT PART NUMBERS

7.1 ENMET part numbers for sensors and replacement parts: ................................................................................................. 29

7.2 ENMET part numbers for Calibration equipment: ............................................................................................................. 29

8.0 WARRANTY .......................................................................................................................................................... 30

A

PPENDIX A: CO CHARACTERISTICS

A

PPENDIX B: GAS IONIZATION POTENTIALS

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

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

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

................................................................................................................................................................ 9

.......................................................................................................................................................... 13

HC and CO2 (Gas Channels) ........................................................................................................ 15

2,

...................................................................................................................... 28

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

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

...................................................................................................................... 32

List of Figures

F

IGURE 1: EXTERNAL FEATURES OF THE MEDAIR

F

IGURE

1A: S

AMPLE AIR HOSE AND REGULATOR

F

IGURE 2: MEDAIR

F

IGURE 3: MEDAIR

F

IGURE

2A: R

F

IGURE 4: MEDAIR

F

IGURE 5: MEDAIR

F

IGURE 6: MEDAIR

F

IGURE 7: CONNECTION OF CALIBRATION GAS CYLINDER

F

IGURE 9: LOCATION OF GAS SENSOR AND DEW POINT MANIFOLDS

F

IGURE 7: CONNECTION OF CALIBRATION GAS CYLINDER

F

IGURE

10: C

2200 I

NTERIOR FEATURES

2200 M

ELAY, INPUT AND OUTPUT TERMINALS

2200 O
2200 O
2200 M

ARBON MONOXIDE CONCENTRATION

OUNTING DIMENSIONS

PERATIONAL DISPLAY
PERATION MENU FLOW CHART

AINTENANCE MENU FLOW CHART

2200 ................................................................................................. 3

......................................................................................................... 3

.............................................................................................................. 4

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

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

......................................................................................................... 9

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

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

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

........................................................................................... 26

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

List of Tables

T

ABLE 1 : RELAY FAILSAFE SETTINGS

T

ABLE 2: SENSOR OUTPUT

T

ABLE 3: TYPICAL FACTORY ALARM SET POINTS

T

ABLE 4: FACTORY SET GAS ALARMS DELAY

.......................................................................................................................................... 8

Reference Information:

N

OTE

: [important information about use of instrument]

C

AUTION

: [affects equipment – if not followed may cause damage to instrument, sensor etc…]

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

.......................................................................................................... 9

............................................................................................................. 20

............................................................................ 24

W

ARNING

:

Attention / Warning

!

Earth Ground

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

MEDA

IR

2200 ENMET Corporation

1.0 Introduction

The MEDA
supply systems. The instrument is available with up to 4 internal sensors. Available sensors include, but are not,
limited to carbon monoxide (CO), carbon dioxide (CO2), Hydrocarbons (HC) for variations in the oxygen (O2) content
and for dew point. The sensors can be used alone or up to four sensors can be used together. In the instrument, a
sample of the compressed air is passed over each sensor and the resulting electrical outputs are used to evaluate the air
for the target gases.
Some features of the instruments are as follows:

Hydrocarbons (HC) are limited to gases with an ionization potential of 10.6 eV or less. See Appendix B for a list of
gases and IPs.

N

OTE

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

1.1 Unpack

Unpack the
service personnel and the commercial carrier involved immediately.

IR

2200 is a compressed air monitoring instrument that measures and detects certain hazards in medical air

 continuous monitoring of the sample air
 continuous LCD display of gas and vapor concentrations
 menu driven operational and maintenance controls
 menu driven calibration procedure
 audio and visual alarms indicate unsafe conditions
 alarm relay contacts available on terminals
 a fault relay and visual fault alarm
 low air flow fault indication and display
 alarm acknowledgement capability including audio defeat
 mA outputs for each target gas

MEDA

IR

2200

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

Regarding Damaged Shipments

N

OTE

: It is your responsibility to follow these instructions. If they are not followed, the carrier will

not honor any claims for damage.



This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in good
condition.



When it was picked up by the carrier at ENMET, it legally became your company’s property.



If your shipment arrives damaged:

• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and request

immediate inspection of the carton and the contents.

• After the inspection and after you have received written acknowledgment of the damage from the carrier, contact ENMET

Customer Service for return authorization and further instructions. Have your Purchase Order and Sales Order numbers
available.



ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage, usually
$100.00. Repair or replacement charges above that value are your company’s responsibility.



The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping company
when asked to do so in writing by our customer. If you need your shipments insured, please

ENMET Customer Service.

forward a written request to

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
accessories on the order, ascertain that they are present. Check the contents of calibration kits. Notify ENMET customer service
personnel of any discrepancy immediately.

MEDA

IR

2200

is received as ordered. If there are

1.3 Serial Numbers

Each

MEDA

IR

2200

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

1

MEDA

IR

2200 ENMET Corporation

2.0 Instrument Features

2.1 Exterior Features

The exterior of the instrument is shown in Figure 1. The exterior features are as follows:

Feature Description
Enclosure

Input Port

An engineered thermoplastic box, approximately 10x8x6, with a clear hinged front cover.
The entrance for the air sample and calibration gas. The quick release fitting mates with

one on the calibration adapter.

Front Cover Latch

A quick-release latch that holds the clear front cover in place, and is capable of being
padlocked if desired.

Audio Alarm
Mounting Flanges
Sample Air Hose

A loud horn activated by certain alarm conditions.
Flanges with holes for mounting the enclosure to a vertical surface.
A five foot long hose to conduct a sample of the air from the source to the instrument.

The hose has a Female quick release fitting and Male ¼” NPT fitting. See Figure 1A.

N

OTE

: When connecting to a standard 55

PSI

USA Medical air system, Regulator is Not required.

2.2 Display Panel Features

The display panel, shown in Figure 1, is viewed through the clear front cover of the enclosure, and is accessed by
opening the cover. Features are as follows:

Feature Description
Display

Visual
Alarms & Indicators

Pushbutton Switches

•O

PTION

Switch

•S

ELECT

Switch

•Audio Defeat / Alarm
Acknowledge
Switch

A 2 line, 16 character per line, LCD with backlight.
The numerical values of gas concentrations, and other information are displayed.
On either sides of the display:

A red alarm LED for each sensor installed in the instrument, Low level alarm.

The top center of the panel:

A red alarm LED for all sensors installed in the instrument, High level alarm.

Near the center of the panel:

A green power indicator LED
A red fault alarm indicator LED

There are three of these, located near the center of the panel; they are yellow
rectangular membrane switches. They are:

The top left switch.

Directly to the right of the

OPTION

switch.

Directly below the

OPTION

switch.

2

MEDA

N

:

O2

CO

Male Quick Release Fitting

See note below

Fault LED

SELECT

OPTION

Switch

A

/

*Visual Alarm O2

*Visual Alarm CO

Mounting Flanges

Dew

Point

*Visual Alarm

See *note below

Display,

Channel #1

Channel #3

Channel #4

Channel #2

ALARM 2

Female Quick Release

¼” NPT

Male¼” NPT Fitting

Female Quick Release

IR

2200 ENMET Corporation

Visual Alarm 2

(See *note below)

Dew Point

(

If Dew Point option

is installed)

LARM ACKNOWLEDGE

A

LARM DEFEAT

Switch

CO reading O2 reading

Dew Point reading

(If Oxygen option is installed)
See *note below

ppm

%

Switch
Power LED

see *note below

Input Port

Sample/Calibration

Front Cover Latch

Audio Alarm

2 places

Figure 1: External Features of the MEDA

*

N

OTE

: Typical gas reading & alarm locations, depending on instrument configuration, alarms &

IR

2200

readings may be in alternate locations

N

OTE

: When connecting to a standard 55

To Air System

OTE

Sample Air Hose, 5ft Supplied with Monitor

Typical facility air line pressures range from about 55 to 125

regulator can be connected to the inlet of the MEDA

PSI

USA Medical air system, Regulator is Not required.

IR

2200 and should be set at 55

Regulator not supplied with the monitor

to Inlet Port to MEDA

Example of Regulator, Not Supplied with Monitor

IR

2200

Figure 1A: Sample Air Hose and Regulator

to Sample Port

PSI

. The outlet pressure of the

PSI, ± 5 PSI

.

3

MEDA

Power Input

Audio

Sensor Dew Point

Relay Terminals

Aux Terminals

Dew Point Terminal

Optional

Fuse Holders

Sensor

Digital Communication

Ground Screw

Dew Point Manifold

4 –

20mA Output

IR

2200 ENMET Corporation

2.3 Circuit Board Features

The Display Panel is hinged on the left and is released by unscrewing the 2 screws located in the right corners. After
releasing the panel, it is swung to the left, exposing the interior of the enclosure. The Circuit Board is mounted at the
back surface of the enclosure interior. Features are shown in Figure 2.

Feature Description
Relay Terminals

Output Terminals
Sensor Manifold

Dew Point Manifold

Flow Sensor

Horn Terminal

(6 places)

This group of terminals is located at the left side of the Circuit Board.
For the contacts for each of four alarm relays, and for the contacts of a fault relay.
One 4-20mA output per active channel. 2 channels/outputs per connector.
The sample manifold, the carbon monoxide, carbon dioxide and oxygen sensors are

located under this housing.
The dew point sensor is installed into this housing.

Terminals

4 places

Terminals

Optional (2 places)

0.630 Amp
(2 places)

J21

Terminal J23

Figure 2: MEDA

IR

2200 Interior Features

Manifold

If Dew Point option is
installed

If Dew Point option is
installed

Alarm

4

MEDA

Mounting Holes

IR

2200 ENMET Corporation

3.0 Installation

3.1 Mounting of Instrument

The MEDA
where the air is being used. The MEDA
reaches the users.

Mount the instrument on an appropriate vertical surface using the mounting flanges provided. Avoid areas with
excessive vibration or temperature extremes. The holes in the flanges are 0.31 inch in diameter and form a 6 x 10.75
inch rectangle. See Figure 3.

It is recommended to use #8 drywall anchors and screws for mounting the MEDA
surface.

0.31” dia. 4 places

IR

2200 should be located near the pipe or tank containing the air to be monitored, and upstream from

IR

2200 must be installed such that it samples the compressed air before it

IR

2200 to a drywall/sheetrock

Dimensions are in inches.

Figure 3: MEDA

IR

2200 Mounting Dimensions

5

MEDA

Connector

Connector

Connector

Connector 2

Connector 1

Ground Screw J21

Power Input

IR

2200 ENMET Corporation

3.2 Sample Air Supply

Tap the pipe or tank containing the breathing air and use appropriate fittings to connect the sample input hose. The
instrument is designed to operate from an air supply pressure 55

PSIG

.

The sample air exits the instrument from the hole plug located on the bottom of the enclosure. Take care not to
obstruct this exit port.

3.3 Power Supply

The input power can vary from 100 to 240VAC, 50/60 Hz. Mains power should be connected to the Power Input
Terminal J23 and the ground screw J21. See Figure 2 for location.

W

!

ARNING

:

Continuous gas detection and alarm systems become inoperative upon loss of primary power.

Upon supplying air and power to the instrument:

 The green power on LED is lit.
 The display backlight is lit, and instrument will step through a start-up sequence: unit serial number, software

revision and gases monitored may be shown on the display.

The instrument may go into alarm briefly, but the sensors stabilize quickly. If the instrument persists in alarm,
acknowledge the alarm by pressing the A

UDIO DEFEAT

/ A

LARM ACKNOWLEDGE

switch. If alarm persists longer than

30 minutes, call ENMET customer service personnel.

3.4 Outputs

Two types of alarm outputs are available, relay contacts and 4-20mA outputs.

Channel 3 & 4
4-20mA Output

Dew Point Sensor

4-20mA Input

4-20mA Input

Terminal J23

Relay 1
Channel 1
Alarm 1

Relay 2
Channel 2
Alarm 1

Relay 3
Channel 3
Alarm 1

Relay 4
Channel 4
Alarm 1

Relay 5
Channel 1-4
Alarm 2

Relay 6
System Fault

Channel 1 & 2
4-20mA Output

Connector RS485

Connector RS232

Connector RS485

Figure 2A: Relay, Input and Output Terminals

6

MEDA

Position

Fai

lsafe

-

Alarm

Non-Failsafe

-

Alarm

Channel 1

Channel 2

Channel 3

Channel

4

IR

2200 ENMET Corporation

3.4.1 Relay Contacts

Relay contacts are available for each alarm; these are SPDT, rated at 10Amp at 110VAC, and may be latching or non­latching as required by the application.

They are accessed on the terminals next to each relay see Figure 2 & 2A. The contact positions are noted on the
circuit board next to each terminal.

Relays may also be configured as failsafe or non-failsafe. The default alarm relay configuration is for latching mode,
and failsafe. They may be reconfigured in the maintenance menu. See section 5.3.5 & 5.3.6

The PC Board is labeled for the relays in their un-energized state. If the relay is configured for failsafe, then this is also
the alarm condition state. Non-failsafe configured relays in the alarm state, are the reverse of the PC board labeling.
Note that the Fault(FLT) relay cannot be set to operate in a Non-Failsafe mode. Please see the Table 1 below:

Table 1 : Relay Failsafe Settings

J5 Relay 1 - NO Normally Open Normally Closed
J5 Relay 1 - COM Common Common
J5 Relay 1 - NC Normally Closed Normally Open
J6 Relay 2 - NO Normally Open Normally Closed
J6 Relay 2 - COM Common Common
J6 Relay 2 - NC Normally Closed Normally Open
J8 Relay 3 - NO Normally Open Normally Closed
J8 Relay 3 - COM Common Common
J8 Relay 3 - NC Normally Closed Normally Open
J10 Relay 4 - NO Normally Open Normally Closed
J10 Relay 4 - COM Common Common
J10 Relay 4 - NC Normally Closed Normally Open
J14 Relay 5 - NO Normally Open Normally Closed
J14 Relay 5 - COM Common Common
J14 Relay 5 - NC Normally Closed Normally Open
J15 Relay 6/FLT - NO Normally Open N/A
J15 Relay 6/FLT - COM Common N/A
J15 Relay 6/FLT - NC Normally Closed N/A

Relays can be linked to specific alarms. The table below shows the default relay links. They may be changed in the
maintenance menu if required. See Section 5.0.

Relay 1 Low Alarm
Relay 2 Low Alarm
Relay 3 Low Alarm
Relay 4 Low Alarm
Relay 5 High Alarm High Alarm High Alarm High Alarm

In addition, there is a fault relay, which changes state whenever the instrument is in a fault condition. The contact
positions are noted on the circuit board next to each terminal. See Figure 2A. The coil of this relay is energized when
the instrument is in the non-fault state; the contact conditions given on the circuit board next to the terminal, are for the
non-energized state, which is identical to the fault state.

These relay contacts can be used to operate auxiliary alarms or other functions. It is recommended that power for
auxiliary equipment be supplied form an independent power source, separate for the MEDA
the enclosure for a wire exit, and use appropriate cable fittings. Be sure to note the location and depth of hardware
inside the enclosure.

7

IR

2200. Place a hole in

MEDA

IR

2200 ENMET Corporation

3.4.2 Optional 4-20mA Outputs

Isolated 4-20 mA outputs are available for data logging or other purposes. An output is supplied for each sensor
supplied in a particular instrument, and can be added when a sensor is added in the field. These outputs are available
on the Connector 1 for channels 1 & 2 and Connector 2 for channels 3 & 4.

4mA corresponds to a sensor reading at the bottom of the instrument range and 20mA corresponds to a full scale
reading. Standard ranges are shown in Table 2.

Table 2: Sensor Output

Sensor 4mA 20mA
CO 0 50

Dew Point -112 °F 68 °F
O2 0 30
CO2 0 5000
HC 0 100

Wiring requirements are the same as for the relays.

3.5 Installation Verification

All instruments are calibrated at the factory. You may, if a calibration kit is available, calibrate the any and all gas
channels of the instrument 24 hours after installation to verify proper installation and instrument operation. See
Section 5.0, Maintenance, for calibration instructions. Calibration is also recommended after the first month of
operation. Subsequent calibrations should be performed every 3 months. The dew point sensor can not be calibrated
in the field.

8

MEDA

CO

0

O2 20.9

CO

PPM

O2

%

CO2

PPM

IR

2200 ENMET Corporation

4.0 Operation

4.1 Normal Operation Condition

With the MEDA
is lit and the information on the display is as shown in Figure 4 Display, for the sensor(s) installed in the MEDA

2200. The red alarm and fault LEDs are not lit.

IR

2200 installed as described in Section 3, and in clean air, the POWER green LED is on, the display

IR

DEW
POINT

DP -20 CO2 300

Example of display with CO(ch 1), Dew Point((ch 2), Oxygen(ch 3) and CO2(ch 4)options installed

Figure 4: MEDA

IR

2200 Operational Display

4.2 Alarm Set Points

There are two alarm set points for each installed channel of the MEDA
points are shown in Table 3.

IR

2200. The factory settings of these alarm set

Table 3: Typical Factory Alarm Set Points

Typical Channel #

1 Carbon Monoxide 10 ppm 20 ppm
2 Dew point 35°Fahrenheit at 55
3 Oxygen Deficiency 19.5 % by volume 23.5 % by volume
4 Carbon Dioxide 500 ppm 1000 ppm

4 or Hydrocarbon 5 ppm 10 ppm

These alarm set points can be changed within limits; see the maintenance section of this manual for the procedure.
 If the CO concentration increases above that of the alarm set point, the associated red LED is lit, the associated

relay changes state, and the audio alarm is activated.

 If the dew point increases above that of the alarm set point, the associated red LED is lit, the associated relay

changes state, and the audio alarm is activated.

 If the oxygen content of the sample air decreases below the deficiency alarm set point, the associated red LED is

lit, the associated relay changes state, and the audio alarm is activated.

 If the oxygen content of the sample air exceeds that of the abundance alarm set point, the associated red LED is lit,

the audio alarm is activated, and both the oxygen alarm relay and the oxygen high alarm relay change state.

 The HC sensor can only detect and alarm to hydrocarbons with an Ionization Potential of less then 10.6 eV.

See Appendix B.

 The HC sensor is broad range in nature and is unable to differentiate between different hydrocarbons.
 The Alarm 1 differential value is the delay of the MEDA

reading has returned past the alarm point by the differential value. Example: If the alarm set point is Λ 10 and the
differential is 2, the MEDA

Gas Alarm 1, Flashing LED Alarm 2, Steady LED

PSIG

50°Fahrenheit at 55

IR

2200 staying in alarm condition until after the measured

IR

2200 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.

PSIG

9

MEDA

IR

2200 ENMET Corporation

4.3 Alarm Latching or Differential Settings

An instrument is shipped with the alarms in the latching mode. The alarms may be independently configured in the
non-latching mode or differential setting by use of the maintenance menu.

See Section 5.3.3, for setting alarm 1 and alarm 2.

Standard Setting

 I

N THE LATCHING MODE

cease, and the alarm relay contacts do not revert to the non-alarm state, until the

ACKNOWLEDGE

switch is pressed. An alarm can also be acknowledged by pressing the switch during the alarm

: at the cessation of the condition which causes an alarm, the alarm indications do not

AUDIO DEFEAT / ALARM

condition; then at the cessation of the alarm condition, alarm indications cease and alarm relays revert to the non­alarm state. After an alarm is acknowledged, alarms in the latching configuration are re-armed to latch at the next
alarm condition.

 I

N THE NON-LATCHING MODE

: at the cessation of the condition that causes an alarm, the alarm indications

automatically cease, and the alarm relay contacts revert to the non-alarm state.

Differential Setting

 The Alarm 1 differential value is the delay of the MEDA

reading has returned past the alarm point by the differential value. Example: If the alarm point is Λ 10 and the
differential is 2, the MEDA

IR

2200 will go into alarm at 10 and stay in alarm until the reading has dropped below

8.

IR

2200 staying in alarm condition until after the measured

4.4 Audio Defeat

Pressing the
Relays and alarm LEDs continue to function, in the alarm state, during an alarm condition. As long as the alarm
condition persists, the audio alarm will “chirp” every 20 seconds.

 If after 15 minutes the alarm condition continues the audio alarm will reactivate at full intensity.
 If any other alarm condition occurs while the audio alarm has been silenced it will force the audio alarm to

reactivate immediately.

AUDIO DEFEAT / ALARM ACKNOWLEDGE

switch during an alarm temporarily silences the audio alarm.

4.5 Display

In clean air a display is shown in Figure 4. This position of the display is termed the "operational display". As
explained below, the display can be used to view other information by using the

Concentrations of CO and CO2 are given in PPM (parts per million parts of air). Dew point is given in degrees
Fahrenheit at 55

PSIG

; this can be changed to degrees Centigrade by pressing the SELECT switch. Oxygen

concentration is given in percent by volume.
When sample flow is reduced below a limit, the bottom line of the display flashes “Low Flow Alarm”.

OPTION

and

SELECT

switches.

10

MEDA

3

4

S

IR

2200 ENMET Corporation

4.6 Operational Menu

The operational menu allows the user to:

 View alarm set point concentration values
 View alarm ascending/descending trigger, latching and delay configurations
 Enter the maintenance menu with the proper Password.

The operational menu is accessed with the
Figure 5,

 Pressing the
 Pressing the

OPTION
SELECT

switch is indicated with a "O"

switch is indicated with a "S".

If the instrument is left at any location in the operational or maintenance menus, other than the operational display,
with no action taken for a period of 45 seconds, it returns to the operational display.

CH-1 CH­ CH-2 CH-

S

No
Function

O

Relays 123456

6=ON

666666

No

S

Function

O

CH1 SCALE (CO)

0 – 50

O

Λ

L10 A1 vL19.5

vL-40

PPM

Λ

D 500

S

for each active channel

CH2 SCALE (DP)

O

-112 – 68 F

O

CH3 SCALE

0.0 – 30.0 %

O

CH4 SCALE (CO2)

0 – 5000

No

S

Function

O

Λ

L20 A2 Λ 23.5

Λ

L39

Λ

1000

No

S

Function

O

ALARM1 Delays

(Seconds)

Alternating

O

50 mASPAN 30.0

68 5000

No

S

Function

O

O

Enter Maint Menu

OPTION

S

(O2)

S

S

5 5

5 5

Enter Password

_

PPM

and

SELECT

switches. The operational menu flow chart is shown in

O = Press Option switch
S = Press Select switch

Displays are examples of gases:

 Channel 1 = Carbon Monoxide
 Channel 2 = Dew Point
 Channel 3 = Oxygen
 Channel 4 = Carbon Dioxide

6 - Indicates relay is engaged
Displays are examples of Alarms

Λ

- Indicates alarm triggered on
increasing value of reading

v - Indicates alarm triggered on

decreasing value of reading

Displays are examples of Alarms

L – Indicates alarm is in latching

mode.

(no L present) – Indicates alarm

is in non-latching mode.

Displays are examples of Alarms

D – Indicates alarm is in

Differential Setting.

(no D present) – Indicates alarm

is in Standard Setting.

No

S

Function

See Maintenance Menu Diagram

Figure 5: MEDA

IR

2200 Operation Menu Flow Chart

11

MEDA

IR

2200 ENMET Corporation

4.7 Fault Indications

4.7.1 Low Flow Indication

A flow sensor is used to furnish a low flow indication. When the sample air pressure drops below approximately 0.3
LPM, the fault light and audio alarm are activated, and the display flashes “Low Flow Alarm”.

4.7.2 Other Fault Indications

Other fault indications are associated with sensor zero and calibration activities, and are described in the maintenance
Section 5.0 of this manual.

4.8 Dew Point Sensor Response

It is a characteristic of the MEDA
through it, than it does to add moisture to a sample by passing moist air though it. Therefore, the time response of the
instrument to a step change from moist to dry air is slower, then the response to a step change from dry to moist air.

It is the nature of most materials to absorb and release moisture at different rates. In general, it typically takes longer
for a system to establish moisture equilibrium when going form a high to low humidity than it does to go from low to
high. The MEDA
instrument is first put on the air line if the Dew Point is less than 0°F. The sensor T90 response time is 10 seconds for
a –40° to +50°F step change and 240 seconds for a +50° to –40°F step change. The delivery apparatus such as
regulators, piping and tubing account for the additional response time of the instrument as a system.

IR

2200 is no different. It may take up to 12 hours to establish moisture equilibrium when the

IR

2200 that it takes more time to extract moisture from a sample by passing dry air

4.9 Hydrocarbon Sensor Response

If a Hydrocarbon (HC) sensor is supplied with the MEDA
and vapors with an ionization potential (IP) of 10.6 eV or less. Hydrocarbons with an IP of greater then 10.6 eV will
NOT be detected. Please see Appendix B for a list of common gases and vapors and their respective IP rating.
Unless otherwise noted Isobutylene is used as a calibration and reference gas.

IR

2200 instrument, it designed to detect hydrocarbon gases

12

MEDA

Enter Password

CO

PPM

O2

%

O

S

S

Enter Password

0000

Enter

Maint Menu

Changes digit indicated by underscore cursor

Locks underscored digit and moves cursor to next digit

O

Valid

Invalid

!

IR

2200 ENMET Corporation

5.0 Maintenance

The MEDA
should be performed immediately following installation, one month after installation and every 3 months thereafter.
HC sensor should be calibrated on a monthly bases. Oxygen and CO sensor have an estimated lifetime of 1 – 3 years.
The CO2 sensor has an estimated lifetime of 3-5 years. Sensors should be replaced when they will not calibrate or
shortly before the end of their estimated lifetime.

The dew point probe (sensor) can not be field calibrated. Dew point sensors should be replaced every two years.

5.1 Cleaning Instructions

C

AUTION

Clean the exterior of the MEDA
cloth with solution so that moisture drips onto, or lingers on, external surfaces.

Under no circumstances should organic solvents such as paint thinner be used to clean instrument surfaces.

5.2 Maintenance Menu

5.2.1 Accessing Maintenance Menu

The MEDA
switches. See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.

Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the password
is 1270. When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.

To enter the maintenance menu. Press the
switch for the Enter Password menu. Enter the valid password as described below.

In the "Enter Maint Menu" position

 Press the
 In the T000 position, the underline cursor is under the left digit.

 Press the
 Press the

Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the
display is transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to
the Enter Maint Menu display.

IR

2200 requires periodic sensor calibration and replacement. Calibration of toxic gas and oxygen sensor

: Never spray a cleaning solution on the surfaces of the MEDA

IR

2200 enclosures with a mild soap solution on a clean, damp cloth. Do not soak the

IR

2200 maintenance menu is accessed by entering the proper password with the

SELECT

OPTION

switch "Enter Password T 0" is displayed. Press

switch until “Enter Maint Menu” is displayed then press

digit, this will be the first digit of the password.

OPTION

switch to change the left digit; select the correct digit.

SELECT

switch, which locks the digit in place and moves the cursor one digit to the right.

IR

2200 devices.

SELECT

OPTION

and

switch once, to move cursor to next

SELECT

SELECT

DEW
POINT

Example: Password Display (with factory installed password entered) and Flow Chart below.

(6)

To Calibration
See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.

1270

T

O = Option Switch
S = Select Switch

13

MEDA

O

S

Press

Press

See Section

Display

S

O

S

Changes digit indicated by underscore cursor

Locks underscored digit and moves cursor to next digit

O

Valid

Invalid

O

S

O

Changes digit indicated by underscore cursor

O

S

Press

See Section

O

S

Alarm 1

Press

See Section

O

S

Alarm 2

Press

See Section

O

S

Alarm Delay

Press

See Section

O

S

Ch 1, 2, 3, 4

Pressing

See Section

O

S

Relay

Failsafes

Pressing

See Section

Press

See Section

If installed

O

S

O

S

Press

See Section

IR

2200 ENMET Corporation

5.2.2 Maintenance Menu Flow Chart

The maintenance menu diagram is shown in Figure 6 Maintenance Menu Flow Chart. From the operational
display, press the

To/From

Operational

OPTION

switch 6 times; "Enter MAINTENANCE Menu" is displayed.

From Operational Menu

O

PTION

Press

(6 times)

O = Press Option
S = Press Select

Enter Maint Menu

(6)

MAINTENANCE MENU

Calibration

MAINTENANCE MENU

Scale mA Xmtrs

MAINTENANCE MENU

Set Alarm1

MAINTENANCE MENU

Set Alarm2

MAINTENANCE MENU

Set Alarm Delays

Enter Password

0000

Calibration

Select (Gas)

Scale mA Xmtrs

Select (Gas)

Select: XX

Select: XX

Select: XX

until the channel to be

O

PTION

for calibration instructions.

5.3

until gas to be

O

PTION

for transmitter set-up instructions.

5.3.2

until the gas alarm to be

O

PTION

for setting alarms instructions.

5.3.3

until the gas alarm to be

O

PTION

for setting alarms instructions.

5.3.3

until the gas alarm delay to be

O

PTION

for setting alarms instructions.

5.3.4

Set-Up

Calibrated

is displayed

is displayed

Set

is displayed

Set

Set

is displayed

is displayed

MAINTENANCE MENU

Configure Alarms

MAINTENANCE MENU

Relay Failsafes

MAINTENANCE MENU

mA Output Span

MAINTENANCE MENU

Set New Password

MAINTENANCE MENU

Exit maint menu

Figure 6: MEDA

R1 L

R:1 Failsafe ON

mA Output Span

Select: (Gas)

Password

XXXX

to return to top of maintenance menu.

O

PTION

to return to operational menu.

S

ELECT

for instructions on how to exit Maintenance Menus.

5.3.9

IR

S

2200 Maintenance Menu Flow Chart.

14

changes letter indicated by underscore cursor

O

PTION

for configuring relay instructions.

5.3.5

changes Failsafe setting from ON to OFF

O

PTION

for configuring relay failsafe instructions.

5.3.6

until the gas span to be

O

PTION

for output span instructions.

5.3.7

is displayed

Set

Locks underscored digit and moves cursor to next digit

See Section 5.3.8

for changing password instructions.

MEDA

O

S

S

Calibration

Select (Gas)

MAINTENANCE MENU

Calibration

CO:XX11

LowCal:

0

000

S

each digit

CO:XX14

HiCal:

0

000

S

each digit

Default Calibration Points

IR

2200 ENMET Corporation

5.3 Calibration for CO, O

HC and CO2 (Gas Channels)

2,

Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. This is a two
step process. A Low Calibration sets clean air reference point and the High Calibration function sets the sensitivity of
the instrument.

Calibration equipment is available from ENMET Corporation to calibrate the MEDA

IR

2200. A list of needed

material is in Section 7.0. A calibration adapter will have a fitting for the gas cylinder on one side, and a quick­disconnect to attach to the instrument on the other.

You may exit the calibration section, at any time, by pressing and holding the

OPTION

switch for 3 seconds, if entering

calibration section by mistake or calibration gas is not available.
Wait 24 hours after initially supplying air and power to the MEDA

necessary to open the Front Panel to make adjustment. The calibration functions are operated through the

SELECT

switches on the front panel.

IR

2200 sensor before initial calibration. It is not

OPTION

After entering a valid password to maintenance menu, see Section 5.2.1, the calibration section is the first menu
section; enter by pressing the

SELECT

switch.

Supply sensor with clean air for LowCal/ZeroCal setting and apply calibration gas for HiCal/SpanGas setting.

 Press the
 Press the
 Press the

SELECT
OPTION
SELECT

switch "Calibration Select XX" is displayed. XX = the gas to be calibrated

switch, if needed, to change to the gas to be calibrated.

switch, the gas & current reading are displayed in upper portion of display. The mV reading &

"LowCal 0" is displayed in the lower portion of display. This is the LowCal setting, usually zero, clean air must
be supplied to the sensor. This reading needs to be at or near zero. If it is not then a cylinder of clean 20.9 air
should be used. See Figure 7 if this is required.

 Press the

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display

will move to "HiCal xx" gas calibration. xx = the level of gas to be used for calibration. The mV reading is
shown in the upper right hand corner of the display.

 Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.
 Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the
calibration is successful the display will momentarily show Cal OK then slope and off set readings, before
returning to the Calibration Menu

Repeat above steps for each channel to be calibrated.
To continue on too next section Press the

 Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

Example: Full Calibration Flow Chart, for CO
From Valid Password Entry

Press O

O

Calibrated

PTION

until the gas to be

is displayed

Gas LowCal HiCal

CO 0 20
O2 N/A 20.9
CO2 0 1000
HC 0 10

and

N

OTE

: The dew point sensor/probe can not be calibrated in the field and should be replaced every two years.

O = Press Option
S = Press Select

15

MEDA

Cylinder Valve

Calibration/Sample

IR

2200 ENMET Corporation

Port

and Regulator

Cylinder of Gas

Figure 7: Connection of Calibration Gas Cylinder

5.3.1A Low Cal/ZeroCal Adjust

A Low Cal function should be performed only when the MEDA
air. Use a cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the
calibration adapter, attach the adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.

Enter the maintenance menu by repeatedly pressing

Figure 6, MEDA

IR

2200 Maintenance Menu flow chart.

OPTION

The first menu available is the Low Cal/ZeroCal.
Press the

SELECT

switch 4 times to perform a Low Cal.

 If the Low Cal/ZeroCal is successful, The display will change to Hi Cal/SpanGas.

If you wish to Hi Cal/SpanGas the sensor apply calibration gas. Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and hold
then release. Then press

OPTION

switch until “Exit maint menu” appears and then press

instrument to the Operational Display

IR

2200 sensor are exposed to clean uncontaminated

switch, until the maintenance menu is displayed. See

OPTION

switch until the Maintenance Menu is displayed

SELECT

switch to return the

 If the Low Cal/ZeroCal is Not successful, sensor is outside of safe parameters to Low Cal, a “SLP/Off Set err”

will be indicated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a cylinder of 20.9% Oxygen.

5.3.1B High Cal/SpanGas Adjust

A High Cal/Span Gas should only be preformed after a successful Low Cal/ZeroCal has been completed.

 Press the

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display

will move to "HiCal xx" gas calibration. xx = the level of gas to be used for calibration. The mV reading is
shown in the upper right hand corner of the display.

 Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.
 Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the

calibration is successful the display will momentarily show Cal OK then slope and off set readings, before
returning to the Calibration Menu.

 If High Cal is not successful, sensor is outside of safe parameters to High Cal, a Cal Slop Err will be indicated.

Verify calibration gas is correct and that the gauge on the regulator shows pressure in the cylinder.
Repeat above steps for each channel to be calibrated.
To continue on too next section Press the

 Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

16

MEDA

O

mA Xmtr Scale

Scale mA Xmtrs

Set Up

CH#: XX

mA Xmter

4mA:

0

000

S

each digit

CH#: XX

mA Xmter

20mA:

0000

S

each digit

IR

2200 ENMET Corporation

5.3.2 Set 4 –20mA Transmitter Scale

This section of the maintenance menu is installed when there are 4-20mA style sensors for dew point or other gases.
This function is normally performed at the factory and is not usually required to be performed in the field unless a

new transmitter is installed.
Consult the factory before entering this section of the maintenance menu.
After entering a valid password into maintenance menu, the Scale mA Xmtrs section is the second menu section, if it

is installed, enter by pressing the S

 Press the
 Press the
 Press the
 Press the

move to the full Scale mA Xmtrs menu

 Press the
 Press the

will return to the Scale mA Xmtrs menu

 Repeat these steps for each 4 –20mA transmitter.
 Press

Operational Display

Example: Sensor/Transmitter Set Up Flow Chart

MA INTEN ANCE M ENU

OPTION

,1

SELECT
OPTION
SELECT
SELECT

SELECT
SELECT

switch "mA Xmter Scale: Select XX" is displayed. XX = the gas to be set up.

switch, if needed, to change to the gas to be set up.

switch, “Ch#: mAXmter: 4mA: 0000” is displayed
switch, that moves the cursor one digit to the right when the last digit is accepted the display

switch, “Ch#: mAXmter: 20mA: 0000” is displayed
switch, that moves the cursor one digit to the right when the last digit is accepted the display

switch until “Exit maint menu” appears and then press

S,2

ELECT

Select (Gas)

switch

O

Press O

PTION

is displayed

until the gas to be

O = Press Option
S = Press Select

SELECT

switch to return the instrument to the

Example

: Set up values

DP -112F 68F

,1 N
,2 N

OTE

: Press

OPTION

OTE

: Consult the factory before entering or making any adjustments.

do not press

SELECT

, Consult the factory prior to selecting

17

SELECT

.

MEDA

IR

2200

5.3.3 Set Alarm Points

Factory alarm set points are discussed in Section 4.2, See Table 1. To change the alarm points, you must enter the
maintenance menu.

Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the
password is 1270. When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.

In the "

Enter Maint Menu



Press the

digit, this will be the first digit of the password.



In the



Press the



Press the

Continue this process until the four-digit password is complete. When a valid password is inserted in this manner,
the display is transferred to the "
returned to the Enter Maint Menu display.

After entering a valid password



Press the



Press the



Press the



Press the

left most character, Λ for ascending trigger point or V for descending trigger point indicator.



Press the



Press the



Press the



Press the

If

STD

is selected, "



The next character is the latching indicator L or



The next character is the negative sign – press the



The next characters are the alarm 1 value, press the

When the last digit is accepted display returns to the "

If

DIFF



The next characters are the alarm 1 value, press the



Press the



"

ALARM 1



Press the



The next characters are the alarm 1 differential value, press the



Press the

When the last digit is accepted display returns to the "

Note:

The Alarm 1 differential value is the delay of the
measured reading has returned past the alarm point by the differential value.
and the differential is 2, the
below 8.



Repeat for each sensor alarm 1 to be changed.



Press the



Repeat as for alarm 1 using the



Press

Operational Display

SELECT

T000

position, the underline cursor is under the left digit.

OPTION
SELECT

OPTION
SELECT
OPTION
SELECT

OPTION
SELECT
OPTION
SELECT

is selected, "

SELECT

DIFF BAND 000

OPTION

SELECT

OPTION

OPTION

switch until “Exit maint menu” appears, then press

switch until;

switch, "

switch until, desired gas is displayed.

switch; "

switch to toggle between Λ and V; select the correct indicator.

switch to lock in the correct indicator. "

switch to toggle between

switch to lock in the correct indicator.

ALARM 1

ALARM 1

switch to lock in the correct character and move the cursor to the right.

switch to select each digit of the value.

switch to lock in the correct character and move the cursor to the right.

switch to move to alarm 2, "

ENMET Corporation

" position

switch "

Enter Password T 0

" is displayed. Press

SELECT

switch once, to move cursor to next

switch to change the left digit; select the correct digit.

switch, which locks the digit in place and moves the cursor one digit to the right.

Calibration

" portion of the menu. If an invalid password is inserted you are

:

“Maintenance Menu Set Alarm1”

ALARM1 Select: XX
ALARM 1

V

L " is displayed.

V

" is displayed, with the flashing placeholder underscore cursor, under the

" is displayed.

STD

and

NO

DIFF

L

press the

OPTION

OPTION

Set Alarm1

Λ DIFF 000

" is displayed, to

" is displayed, to

OPTION

set alarm 1 differential

set alarm 1 value

Set Alarm1

MEDA

MEDA

IR

2200

will go into alarm at 10 and stay in alarm until the reading has dropped

Set ALARM2

STD

section.

ALARM 1

; select the correct indicator.

switch to toggle the negative sign.

appears on display.

XX =

the gas of alarm point to be changed.

STD

" is displayed

OPTION

switch to toggle the latching mode.

switch to select each digit of the value

" position.

.

switch to select each digit of the value

.

OPTION

switch to select each digit of the value

" position.

IR

2200

staying in alarm condition until after the

Example

: If the alarm set point is Λ 10

" is displayed.

SELECT

switch to return the instrument to the

18

MEDA

S

O

S

O

S

Alarm 2 -

Select:

XX

MAINTENANCE MENU

Set Alarm2

Changes character indicated by underscore cursor

Locks underscored character and moves cursor to next

O

Press

O

until the channel to be

Set

is displayed

Alarm 2

V L 0

000

O

S

S

MAINTENANCE MENU

Set Alarm1

Alarm 1 -

Select: XX

O

Press

until the channel to be

is displayed

STD

Alarm 1

O

S

D

Locks selection

S

Alarm 1 DIFF

BAND

0

00

L–010

Alarm 1

O

S

S

S

Alarm 1

O

S

Locks selection

S

TL

Alarm 1

O

S

Locks selection

Alarm 1

DIFF

0

00

S

IR

2200

Example:

Displays are

Set Alarms Flow Chart

examples

Λ -

Indicates alarm triggered on increasing value of reading

v

-

Indicates alarm triggered on decreasing value of reading

L-

Indicates alarm is set for latching

NO

L-

Indicates alarm is set for non-latching

STD

– Indicates alarm in standard setting, can be set in latched or non-latched mode

DIFF

– Indicates alarm in differential setting, instrument will stay in alarm beyond the alarm set point by the differential value

of Alarms

O

PTION

Toggles status between Λ increasing trigger and v decreasing trigger

Λ

O = Press Option
S = Press Select

Set

ENMET Corporation

Toggles status between Standard and

DIFF

S

TD

Toggles status between

Λ

Λ

Latching and Non Latching

Changes character indicated
by underscore cursor

Locks underscored character and
moves cursor to next digit

PTION

Λ

IFF

Changes character indicated by

O

underscore cursor

Locks underscored character and
moves cursor to next digit

Changes character indicated by

O

underscore cursor

Locks underscored character and
moves cursor to next digit

See Section 4.2 Table 3 for factory alarm set points.

19

MEDA

O

S

MAINTENANCE MENU

Set Alarm Delays

S

O

S

Alarm Delay -

Changes digit indicated by underscore cursor

Locks underscored digit and moves cursor to next digit

O

Select:

XX

Alarm Delay -

0

005

IR

2200

5.3.4 Set Alarm Delay

The alarms may be set to delay by 1 second increments, up to 255 seconds. Alarm delays are factory set to 5
seconds.

To change an alarm delay, you must enter the maintenance menu. Press the
Menu” is displayed then press
in Section 5.2.1. See Table 4 below for factory set delays. A space is provided to record changes.

After entering a valid password:



Press the



Press the



Press the



Press the



Press the



Press the
is accepted display returns to the "



Repeat for each sensor alarm delay to be changed.



Press
Operational Display

Example:

OPTION
SELECT
OPTION
SELECT
OPTION
SELECT

OPTION

Set Alarm Delay Flow Chart

ENMET Corporation

switch until;

switch, "

ALARM Delay Select: XX

SELECT

switch for the Enter Password menu. Enter the valid password as described

“Maintenance Menu Set Alarm Delay”

" is displayed.

OPTION

appears on display.

XX =

switch until “Enter Maint

the gas alarm to be changed.

switch until, desired gas is displayed.

switch; "

ALARM Delay = 0000

" is displayed, with the underscore cursor under the left digit.

switch to change the left digit; select the correct digit.

switch to lock in the correct digit and move the cursor one digit to the right. When the last digit

Set Alarm Delay

switch until “Exit maint menu” appears and then press

Press Option until the channel to be

" position.

SELECT

Set

switch to return the instrument to the

is displayed

O = Press Option
S = Press Select

Table 4: Factory Set Gas alarms Delay

Gas Delay
CO 5 sec

DP 5 sec
O2 5 sec
CO2 5 sec

20

MEDA

Channel 1

Channel 2

Channel 3

Channel 4

O

S

MAINTENANCE MENU

Configure Alarms

Pressing

Pressing

IR

2200

5.3.5 Relay Configuration

To change a relay configuration you must enter the maintenance menu. Press the
Maint Menu” is displayed then press
described below.

In the "

Enter Maint Menu



Press the
digit, this will be the first digit of the password.



In the



Press the



Press the
Continue this process until the four-digit password is complete. When a valid password is inserted in this manner,
the display is transferred to the "
returned to the Enter Maint Menu display.

After entering a valid password:



Press the



Press the



Press the

L

= Low Alarm, H = High Alarm, B = Both Alarms, T = No Relay linked to channel



Press the



Press
Operational Display

Example:

SELECT

T000

position, the underline cursor is under the left digit.

OPTION
SELECT

OPTION
SELECT
OPTION

SELECT

OPTION

switch until “Exit maint menu” appears and then press

Set Relay Configuration Flow Chart

ENMET Corporation

OPTION

switch until “Enter

SELECT

switch for the Enter Password menu. Enter the valid password as

" position

switch "

Enter Password T 0

" is displayed. Press

SELECT

switch once, to move cursor to next

switch to change the left digit; select the correct digit.

switch, which locks the digit in place and moves the cursor one digit to the right.

Calibration

" portion of the menu. If an invalid password is inserted you are

switch until “Configure Alarms” is displayed

switch to enter the Configure Alarms menu

switch to set relay configuration as needed, see below for indications

switch to lock setting and move to next, channel and relay

Ch 1,2,3,4
R1 L

Ch 1 2 3 4
R2 L

Ch 1 2 3 4
R3 L

Ch 1 2 3 4
R4 L

Ch 1 2 3 4
R5

H H H H

SELECT

O

PTION

changes letter indicated by underscore cursor

S

ELECT

Locks underscored digit and moves cursor to next digit

O = Press Option
S = Press Select

switch to return the instrument to the

The table below shows the default relay links.

Relay 1 Low Alarm
Relay 2 Low Alarm
Relay 3 Low Alarm
Relay 4 Low Alarm
Relay 5 High Alarm High Alarm High Alarm High Alarm

Relays can be linked to specific alarms.

N

OTE

:

Each operating channel must be linked to at least 1 relay.

21

MEDA

MAINTENANCE MENU

mA Output Span

mA OUTPUT SPAN

Select: CO

mA OUTPUT SPAN

_

50 CO

MAINTENANCE MENU

Relay

Failsafes

S

Pressing

Relay

Failsafes

R: 1 Failsafe ON

Relay

Failsafes

R: 2 Failsafe ON

Relay

Failsafes

R: 3 Failsafe ON

Relay

Failsafes

R: 4 Failsafe ON

Relay

Failsafes

R: 5 Failsafe ON

IR

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5.3.6 Failsafe Configuration

To change a relay failsafe configuration you must enter the maintenance menu. Press the
“Enter Maint Menu” is displayed then press
password as described below.

In the "

Enter Maint Menu



Press the

digit, this will be the first digit of the password.



In the



Press the



Press the switch, which locks the digit in place and moves the cursor one digit to the right.
Continue this process until the four-digit password is complete. When a valid password is inserted in this manner,
the display is transferred to the "
returned to the Enter Maint Menu display.

After entering a valid password:



Press the



Press the



Press the



Press the



Press
Operational Display

Example:

O

SELECT

T000

position, the underline cursor is under the left digit.

OPTION

OPTION
SELECT
OPTION
SELECT

OPTION

switch until “Exit maint menu” appears and then press

Set Relay Failsafe Configuration Flow Chart

S

ENMET Corporation

SELECT

OPTION

switch for the Enter Password menu. Enter the valid

switch until

" position

switch "

Enter Password T 0

" is displayed. Press

SELECT

switch once, to move cursor to next

switch to change the left digit; select the correct digit.

Calibration

" portion of the menu. If an invalid password is inserted you are

switch until “Relay Failsafes” is displayed

switch to indicate relay to be set.

switch to set relay indicated, On or Off as appropriate.

switch to cycle through each of the 5 relays, return to “Maintenance Menu Relay Failsafes”

SELECT

PTION

O

changes Failsafe setting from ON to OFF

Continue pressing

Changing the setting of each relay as needed, using the

to cycle through all 5 relays

ELECT

switch to return the instrument to the

switch

Option

S

O = Press Option
S = Press Select

5.3.7 Set Output Span Range

To change 4-20 mA output range. This range is set at the factory and should not be changed, contact
information.



Press the



Press
Operational Display

Example:

O

OPTION

OPTION

switch to continue to next section of maintenance menu.

switch until “Exit maint menu” appears and then press

Set Output Span Flow Chart

S

S

S

SELECT

O

Press

PTION

until the channel to be

O

O

Changes

S

Locks underscored digit and moves cursor to next digit

digit indicated by underscore cursor

switch to return the instrument to the

Set

is displayed.

O = Press Option
S = Press Select

ENMET

for

22

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MAINTENANCE MENU

Set New Password

Password

0000

S

IR

2200

ENMET Corporation

5.3.8 Set New Password

To change the password, you must enter the maintenance menu. Press the
displayed then press

SELECT

switch for the Enter Password menu. Enter the valid password as described in Section 5.2.1.

To set a new password, after inserting a valid password,



Press the



Press the



Use the



Press the

When all four digits of the new password have been selected, "

OPTION
SELECT

OPTION

SELECT

switch until; "

switch; "

Set New Password”

Password T1270

is displayed.

" is displayed, with the underscore cursor under the left digit.

switch to change the left digit, when the desired digit is displayed.

switch to lock the digit in place and move the cursor one digit to the right.

Set New Password

Record the new password; without it, the maintenance menu cannot be reentered once you exit the Maintenance Menu.
If the password is lost, call

From the "




Example:

Password XXXX

Press the

Press the

SELECT
OPTION

Set Password Flow Chart

ENMET

customer service personnel.

" position,

switch to return to Set New Password section.

switch; to continue to "

S

T

exit MAINTENANCE Menu

O

Changes digit indicated by underscore cursor

S

Locks underscored digit and moves cursor to next digit

O

OPTION

"

switch until “Enter Maint Menu” is

" is displayed.

O = Press Option
S = Press Select

5.3.9 Exit Maintenance Menu

From the "




Example:

exit MAINTENANCE Menu

Press the

Press the

SELECT
OPTION

switch to resume the operational display.

switch to reenter the maintenance menu at the "

Exit Maintenance Menu Flow Chart

MAINTENANCE MENU

Exit maint menu

O

" position

CH-1 CH-3
CH-2 CH-4

Calibration

MAINTENANCE MENU

Calibration

" position.

23

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Dew Point Probe Manifold

Gas Sensor Manifold

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ENMET Corporation

5.4 Sensor Replacement

5.4.1 Oxygen / Gas Sensor

A Gas sensor must be replaced when it can no longer be calibrated. To replace a sensor, perform the following steps.



Turn off the electrical power. The sample air can continue to flow.



Open the display panel and remove the four manifold retention screws and remove the manifold. See Figure 9.



Remove the old sensor, and replace it with a new sensor.

C

AUTION

:

Some new sensors come with a shorting clip that must be removed before installation, for proper operation.

See Figure 8.



Replace the manifold.



Turn on the electrical power.

Remove Shorting Clip
from Cell if Present

Retaining Screw, 4 places

MOS

CO2

Bottom View of Sensor

Sensor

Figure 8: Shorting Clip

Retaining Screw, 2 places

Ref: Orifice & Pre-filter

Figure 9: Location of Gas Sensor and Dew Point Manifolds

5.4.2 Calibration/Sensor Replacement

Sensor replacement requires that a Factory calibration be preformed. Factory calibration allows the instrument to
properly set operational parameters for each sensor

Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. This is a two
step process. A Low Calibration sets clean air reference point and the High Calibration function sets the sensitivity of
the instrument.

Calibration equipment is available from
material is in Section 7.0. A calibration adapter will have a fitting for the gas cylinder on one side, and a quick­disconnect to attach to the instrument on the other.

You may exit the calibration section, at any time, by
calibration section by mistake or calibration gas is not available.

Wait 24 hours after initially supplying air and power to the
necessary to open the Front Panel to make adjustment. The calibration functions are operated through the

SELECT

switches on the front panel.

ENMET

Corporation to calibrate the

pressing and holding

MEDA

IR

the

2200

sensor before initial calibration. It is not

MEDA

OPTION

IR

2200

. A list of needed

switch for 3 seconds, if entering

OPTION

and

24

MEDA

O

S

S

Calibration

Select (Gas)

MAINTENANCE MENU

Calibration

CO:XX11

LowCal:

0

000

S

each digit

CO:XX14

HiCal:

0

000

S

each digit

Default Calibration Points

IR

2200

ENMET Corporation

After entering a valid password to maintenance menu, see Section 5.2.1, the calibration section is the first menu
section; enter by pressing the

SELECT

switch.

Supply sensor with clean air for LowCal/ZeroCal setting and apply calibration gas for HiCal/SpanGas setting.



Press the



Press and

SELECT

Hold

the

switch "

OPTION

Calibration Select XX

" is displayed.

XX =

the gas to be calibrated

switch, until the letter F appears in the upper right hand corner of the display. The F

indicates that the instrument is in the Factory Calibration Mode



Press the



Press the
"

LowCal 0

OPTION
SELECT

switch, if needed, to change to the gas to be calibrated.

switch, the gas & current reading are displayed in upper portion of display. The mV reading &

" is displayed in the lower portion of display. This is the LowCal setting,

usually zero

be supplied to the sensor. This reading needs to be at or near zero. If it is not then a cylinder of clean 20.9 air
should be used. See Figure 7 if this is required.



Press the
will move to "

SELECT

HiCal xx

switch, that moves the cursor one digit to the right when the last digit is accepted the display

" gas calibration. xx = the level of gas to be used for calibration. The mV reading is

shown in the upper right hand corner of the display.



Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.



Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the
calibration is successful the display will momentarily show Cal OK then slope and off set readings, before
returning to the Calibration Menu

Repeat above steps for each channel to be calibrated.
To continue on too next section Press the



Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

Example:

Full Calibration Flow Chart, for CO

From Valid Password Entry

Press O

O

Calibrated

PTION

until the gas to be

is displayed

Gas LowCal HiCal

CO 0 20
O2 N/A 20.9
CO2 0 1000
HC 0 10

, clean air must

O = Press Option
S = Press Select

N

OTE

:

The dew point sensor/probe can not be calibrated in the field and should be replaced every two years.

25

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Cylinder Valve

Calibration/Sample

IR

2200

Port

ENMET Corporation

and Regulator

Cylinder of Gas

Figure 7: Connection of Calibration Gas Cylinder

5.4.3A Low Cal/ZeroCal Adjust

A Low Cal function should be performed only when the
air. Use a cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the
calibration adapter, attach the adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.

Enter the maintenance menu by repeatedly pressing
Figure 6,

MEDA

IR

2200

Maintenance Menu flow chart.
The first menu available is the Low Cal/ZeroCal.
Press the

SELECT

switch 4 times to perform a Low Cal.

 If the Low Cal/ZeroCal is successful

, The display will change to Hi Cal/SpanGas.

If you wish to Hi Cal/SpanGas the sensor apply calibration gas. Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and
then release. Then press

OPTION

switch until “Exit maint menu” appears and then press

instrument to the Operational Display

MEDA

OPTION

hold

IR

2200

sensor are exposed to clean uncontaminated

switch, until the maintenance menu is displayed. See

OPTION

switch until the Maintenance Menu is displayed

SELECT

switch to return the

 If the Low Cal/ZeroCal is Not successful,

sensor is outside of safe parameters to Low Cal, a “SLP/Off Set err”

will be indicated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a cylinder of 20.9% Oxygen.

5.4.3B High Cal/SpanGas Adjust

A High Cal/Span Gas should only be preformed after a successful Low Cal/ZeroCal has been completed.



Press the
will move to "

SELECT

HiCal xx

switch, that moves the cursor one digit to the right when the last digit is accepted the display

" gas calibration. xx = the level of gas to be used for calibration. The mV reading is

shown in the upper right hand corner of the display.



Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.



Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the
calibration is successful the display will momentarily show Cal OK then slope and off set readings, before
returning to the Calibration Menu.

 If High Cal is not successful

, sensor is outside of safe parameters to High Cal, a Cal Slop Err will be indicated.

Verify calibration gas is correct and that the gauge on the regulator shows pressure in the cylinder.

Repeat above steps for each channel to be calibrated.
To continue on too next section Press the



Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

26

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ENMET Corporation

5.5 Dew Point Sensor

Unlike the CO and O2 sensors, the dew point sensor cannot be field calibrated. To assure correct performance, the dew
point sensor should be replaced every two years.

5.6 Flow Control Orifice / Pre-filter

A 0.005-inch diameter orifice is used to set the flow rate and to drop the air pressure. A pre-filter is in line to help
prevent clogging. In well-maintained medical air systems, this orifice should not clog. However, if difficulty is
experienced in maintaining flow rate with assured inlet pressure, remove air pressure from the equipment and examine
this orifice and pre-filter; replace it if necessary.

Orifice location will depend on instrument sensor configuration. Orifice and pre-filter are located at the output point
of the dew point probe manifold or on the inlet line to the gas sensor manifold.

27

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ENMET Corporation

6.0 Technical Data and Specifications

Electrical Power

Storage and Transport

Operation

Mechanical

Outputs

Sensors Type Range Response Time Life

N

OTE

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

CO 0 – 50 ppm T90 = 30 seconds 1 – 3 years
Dew Point -112 - +68°F T90 = 10 seconds for –40°F to 50°F step change 2 years
O2 0 – 30% T90 = 15 seconds 1 – 2 years
CO2 0 – 5000 ppm T90 = 30 seconds 3 – 5 years
HC 0 – 100 ppm T90 = 30 seconds 1 – 2 years

15 Amp fused branch circuit
100-240 VAC

0.9 A
50/60 Hz

Board Mounted Fuse FH2, 0.630A, 5 x 20mm

Temperature:
preferred
Relative Humidity
Atmospheric Pressure

Temperature:
Relative Humidity
Atmospheric Pressure
Air Line Pressure
Dimensions:
Weight:
Material:

Strain relief: 5-12 mm OD

Relays:

Analog: 4-20 mA x 3
Digital:
Audio: 95 db at 2 ft

-20° to +60°C (-4° to +140°F)
0° to +20°C (32° to 68°F)
0 - 99% RH, non-condensing
20 to 36 inHg (68 to 133 kPa)

0° to +40°C (32° to +104°F)
0 - 99% RH, non-condensing
20 to 36 inHg (68 to 133 kPa)

55

PSI

(± 5

PSI

11 x 9 x 6 inches (4.3 x 3.5 x 2.4 cm)
8 lbs (3.6 kg)
Engineered thermoplastic with hinged front cover

SPDT
Resistive Load Inductive Load
10A at 110 VAC 7.5A at 110 VAC
10A at 30 VDC 5A at 30 VDC

RS-232 – Modbus
RS-485 – Modbus

)

28

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7.0 Replacement Part Numbers

7.1 ENMET part numbers for sensors and replacement parts:

Part number Description

03009-005 Dew Point Probe

03053-000 Sensor, CO2
67025-1114 Sensor, Oxygen
67025-1200 Sensor, CO
03028-000 Sensor, PID, 10.6 eV
03028-005 Sensor, Replacement lamp, PID, 10.6 eV
73540-701 Orifice
73583-700 Pre-filter, orifice
64002-630 Fuse, 0.630 Amp 5x20mm
06008-004 Sensor Gasket
65057-011 Terminal plug, 3 position
65057-012 Terminal plug, 4 position
65057-010 Terminal plug, 2 position

ENMET Corporation

7.2 ENMET part numbers for Calibration equipment:

Part number Description

03219-020 Gas Cylinder, 20 ppm CO in air, (Steel Cylinders)
03296-209 Gas Cylinder, 20.9% oxygen in nitrogen, (Steel Cylinders)
03700-500 Calibration Adapter, CO, O2 (Steel Cylinders)
03223-1000 Gas Cylinder, 1000 ppm CO2 in air, (Aluminum Cylinders)
03700-501 Calibration Adapter, CO2 (Aluminum Cylinders)
03290-010 Gas Cylinder, 10 ppm Isobutylene, (Steel Cylinders)

29

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ENMET Corporation

8.0 WARRANTY

ENMET

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

ENMET

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.
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

other than that, which is set forth herein.

NOTE:







There is 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:

80002-042

October 2006

MCN-344, 03/23/06
MCN-345, 04/12/06
MCN-346, 04/21/06
MCN-351, 08/21/06
MCN-353, 11/03/06
MCN-363, 02/28/07
MCN-369, 06/18/07
MCN-391, 11/15/07
MCN-395, 01/09/08
MCN-398, 03/10/08
MCN-422, 06/16/09
MCN-439, 08/20/10
MCN-469, 10/30/12
MCN-13-009, 12/09/13

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

ENMET

ENMET

confirms that the product is defective, it will be repaired or replaced at no charge, within the stated

neither assumes nor authorizes any representative or other person to assume for it any obligation or liability

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

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

. The warranty covers both parts and labor excluding instrument

ENMET

ENMET

Corporation.

that may arise in connection with this equipment.

ENMET

shall not be

30

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ENMET Corporation

Appendix A: CO Characteristics

The Characteristics and Effects of Carbon Monoxide
Carbon monoxide is a colorless odorless toxic gas generated by incomplete combustion of a hydrocarbon fuel in air. It

may be present where internal combustion engines, furnaces, boilers, and other combustion devices are present. It is
toxic when inhaled because of its great affinity to hemoglobin, the oxygen carriers in the red cells of the blood. CO
replaces the oxygen normally carried by the hemoglobin, and thus inhibits the delivery of oxygen throughout the body;
the victim suffers from oxygen deficiency, and may die from asphyxiation. The symptoms and degree of danger
resulting from exposure to CO depend upon the concentration of the gas and the length of exposure; this is shown in
Figure 10. The
assessment of the degree of danger that he or she is exposed to.

Based upon knowledge of the effects of CO, the Occupational Safety and Health Authority (OSHA) has set limits on
exposure to CO in the workplace. These are 35 ppm (parts CO per million parts air) as an time weighted average for
an eight hour day, and a maximum exposure of 200 ppm. For compressed air line applications, OSHA requires Grade
D breathing air supplied, using a Compressed Gas Association (CGA) definition (G-7.1). Depending on interpretation
of the OSHA respiratory standard, 10 ppm and 20 ppm CO have been used as maximum limits and standard
instrument alarm points.

If a CO sensor is installed, the
adjustable, but cannot be set below 5 ppm or above 50 ppm.

The curves below are for percent Carboxyhemaglobin with 50% being the top curve, 5% the bottom. %COHb is a
measure of the amount of hemoglobin occupied by CO rather than oxygen. CO effects upon children, adults engaging
in physical activity, and smokers, are more pronounced.

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IR

2200

instrument is employed to warn the user of the presence of CO, and to facilitate the

MEDA

IR

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has two preset alarm set points, at 10 ppm and 20 ppm CO, which are

Figure 10: Carbon Monoxide Concentration

31

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IP (eV)

IP (eV)

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Appendix B: Gas Ionization Potentials

Chemical Name
A

2-Amino pyridine 8.00 p-tert-Butyltoluene 8.28
Acetaldehyde 10.21 s-Butyl amine 8.70
Acetamide 9.77 s-Butyl benzene 8.68
Acetic acid 10.69 sec-Butyl acetate 9.91
Acetic anhydride 10.00 t-Butyl amine 8.64
Acetone 9.69 t-Butyl benzene 8.68
Acetonitrile 12.20 trans-2-Butene 9.13
Acetophenone 9.27

Acetyl bromide 10.55 1-Chloro-2-methylpropane 10.66
Acetyl chloride 11.02 1-Chloro-3-fluorobenzene 9.21
Acetylene 11.41 1-Chlorobutane 10.67
Acrolein 10.10 1-Chloropropane 10.82
Acrylamide 9.50 2-Chloro-2-methylpropane 10.61
Acrylonitrile 10.91 2-Chlorobutane 10.65
Allyl alcohol 9.67 2-Chloropropane 10.78
Allyl chloride 9.90 2-Chlorothiophene 8.68
Ammonia 10.20 3-Chloropropene 10.04
Aniline 7.70 Camphor 8.76
Anisidine 7.44 Carbon dioxide 13.79
Anisole 8.22 Carbon disulfide 10.07
Arsine 9.89 Carbon monoxide 14.01

B

1,3-Butadiene (butadiene) 9.07 Chlorine 11.48
1-Bromo-2-chloroethane 10.63 Chlorine dioxide 10.36
1-Bromo-2-methylpropane 10.09 Chlorine trifluoride 12.65
1-Bromo-4-fluorobenzene 8.99 Chloroacetaldehyde 10.61
1-Bromobutane 10.13 α-Chloroacetophenone 9.44
1-Bromopentane 10.10 Chlorobenzene 9.07
1-Bromopropane 10.18 Chlorobromomethane 10.77
1-Bromopropene 9.30 Chlorofluoromethane (Freon 22) 12.45
1-Butanethiol 9.14 Chloroform 11.37
1-Butene 9.58 Chlorotrifluoromethane (Freon 13) 12.91
1-Butyne 10.18 Chrysene 7.59
2,3-Butadione 9.23 Cresol 8.14
2-Bromo-2-methylpropane 9.89 Crotonaldehyde 9.73
2-Bromobutane 9.98 Cumene (isopropyl benzene) 8.75
2-Bromopropane 10.08 Cyanogen 13.80
2-Bromothiophene 8.63 Cyclohexane 9.80
2-Butanone (MEK) 9.54 Cyclohexanol 9.75
3-Bromopropene 9.70 Cyclohexanone 9.14
3-Butene nitrile 10.39 Cyclohexene 8.95
Benzaldehyde 9.53 Cyclo-octatetraene 7.99
Benzene 9.25 Cyclopentadiene 8.56
Benzenethiol 8.33 Cyclopentane 10.53
Benzonitrile 9.71 Cyclopentanone 9.26
Benzotrifluoride 9.68 Cyclopentene 9.01
Biphenyl 8.27 Cyclopropane 10.06
Boron oxide 13.50 m-Chlorotoluene 8.83
Boron trifluoride 15.56 o-Chlorotoluene 8.83
Bromine 10.54 p-Chlorotoluene 8.70
Bromobenzene 8.98

Bromochloromethane 10.77 1,1-Dibromoethane 10.19
Bromoform 10.48 1,1-Dichloroethane 11.12
Butane 10.63 1,1-Dimethoxyethane 9.65
Butyl mercaptan 9.15 1,1-Dimethylhydrazine 7.28
cis-2-Butene 9.13 1,2-Dibromoethene 9.45
m-Bromotoluene 8.81
n-Butyl acetate 10.01 1,2-Dichloroethane 11.12
n-Butyl alcohol 10.04 1,2-Dichloropropane 10.87
n-Butyl amine 8.71 1,3-Dibromopropane 10.07
n-Butyl benzene 8.69 1,3-Dichloropropane 10.85
n-Butyl formate 10.50 2,2-Dimethyl butane 10.06
n-Butyraldehyde 9.86 2,2-Dimethyl propane 10.35
n-Butyric acid 10.16 2,3-Dichloropropene 9.82
n-Butyronitrile 11.67 2,3-Dimethyl butane 10.02
o-Bromotoluene 8.79 3,3-Dimethyl butanone 9.17
cis-Dichloroethene 9.65

p-Bromotoluene 8.67

Chemical Name

C

Carbon tetrachloride 11.47

D

1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)

ENMET Corporation

12.20

32

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IP (eV)

IP (eV)

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ENMET Corporation

Chemical Name
(D continued)

Decaborane 9.88 2-Furaldehyde 9.21
Diazomethane 9.00 Fluorine 15.70
Diborane 12.00 Fluorobenzene 9.20
Dibromochloromethane 10.59 Formaldehyde 10.87
Dibromodifluoromethane 11.07 Formamide 10.25
Dibromomethane 10.49 Formic acid 11.05
Dibutylamine 7.69 Freon 11 (trichlorofluoromethane) 11.77
Dichlorodifluoromethane (Freon 12) 12.31 Freon 112 (1,1,2,2-tetrachloro-1,2-difluoroethane) 11.30
Dichlorofluoromethane 12.39 Freon 113 (1,1,2-trichloro-1,2,2-trifluororethane) 11.78
Dichloromethane 11.35 Freon 114 (1,2-dichloro-1,1,2,2-tetrafluoroethane) 12.20
Diethoxymethane 9.70 Freon 12 (dichlorodifluoromethane) 12.31
Diethyl amine 8.01 Freon 13 (chlorotrifluoromethane) 12.91
Diethyl ether 9.53 Freon 22 (chlorofluoromethane) 12.45
Diethyl ketone 9.32 Furan 8.89
Diethyl sulfide 8.43 Furfural 9.21
Diethyl sulfite 9.68 m-Fluorotoluene 8.92
Difluorodibromomethane 11.07 o-Fluorophenol 8.66
Dihydropyran 8.34 o-Fluorotoluene 8.92
Diiodomethane 9.34 p-Fluorotoluene 8.79
Diisopropylamine 7.73

Dimethoxymethane (methylal) 10.00 1-Hexene 9.46
Dimethyl amine 8.24 2-Heptanone 9.33
Dimethyl ether 10.00 2-Hexanone 9.35
Dimethyl sulfide 8.69 Heptane 10.08
Dimethylaniline 7.13 Hexachloroethane 11.10
Dimethylformamide 9.18 Hexane 10.18
Dimethylphthalate 9.64 Hydrazine 8.10
Dinitrobenzene 10.71 Hydrogen 15.43
Dioxane 9.19 Hydrogen bromide 11.62
Diphenyl 7.95 Hydrogen chloride 12.74
Dipropyl amine 7.84 Hydrogen cyanide 13.91
Dipropyl sulfide 8.30 Hydrogen fluoride 15.77
Durene 8.03 Hydrogen iodide 10.38
m-Dichlorobenzene 9.12 Hydrogen selenide 9.88
N,N-Diethyl acetamide 8.60 Hydrogen sulfide 10.46
N,N-Diethyl formamide 8.89 Hydrogen telluride 9.14
N,N-Dimethyl acetamide 8.81 Hydroquinone 7.95
N,N-Dimethyl formamide 9.12

o-Dichlorobenzene 9.06 1-Iodo-2-methylpropane 9.18
p-Dichlorobenzene 8.95 1-Iodobutane 9.21
p-Dioxane 9.13 1-Iodopentane 9.19
trans-Dichloroethene 9.66 1-Iodopropane 9.26

E

Epichlorohydrin 10.20 2-Iodopropane 9.17
Ethane 11.65 Iodine 9.28
Ethanethiol (ethyl mercaptan) 9.29 Iodobenzene 8.73
Ethanolamine 8.96 Isobutane 10.57
Ethene 10.52 Isobutyl acetate 9.97
Ethyl acetate 10.11 Isobutyl alcohol 10.12
Ethyl alcohol 10.48 Isobutyl amine 8.70
Ethyl amine 8.86 Isobutyl formate 10.46
Ethyl benzene 8.76 Isobutyraldehyde 9.74
Ethyl bromide 10.29 Isobutyric acid 10.02
Ethyl chloride (chloroethane) 10.98 Isopentane 10.32
Ethyl disulfide 8.27 Isophorone 9.07
Ethyl ether 9.51 Isoprene 8.85
Ethyl formate 10.61 Isopropyl acetate 9.99
Ethyl iodide 9.33 Isopropyl alcohol 10.16
Ethyl isothiocyanate 9.14 Isopropyl amine 8.72
Ethyl mercaptan 9.29 Isopropyl benzene 8.69
Ethyl methyl sulfide 8.55 Isopropyl ether 9.20
Ethyl nitrate 11.22 Isovaleraldehyde 9.71
Ethyl propionate 10.00 m-Iodotoluene 8.61
Ethyl thiocyanate 9.89 o-Iodotoluene 8.62
Ethylene chlorohydrin 10.52 p-Iodotoluene 8.50
Ethylene diamine 8.60

Ethylene dibromide 10.37 Ketene 9.61
Ethylene dichloride 11.05

Ethylene oxide 10.57 2,3-Lutidine 8.85
Ethylenelmine 9.20 2,4-Lutidine 8.85
Ethynylbenzene 8.82 2,6-Lutidine 8.85

Chemical Name
F

H

I

2-Iodobutane 9.09

K
L

33

MEDA

IP (eV)

IP (eV)

IR

2200

ENMET Corporation

Chemical Name
M

2-Methyl furan 8.39 2-Pentanone 9.38
2-Methyl napthalene 7.96 2-Picoline 9.02
1-Methyl napthalene 7.96 3-Picoline 9.02
2-Methyl propene 9.23 4-Picoline 9.04
2-Methyl-1-butene 9.12 n-Propyl nitrate 11.07
2-Methylpentane 10.12 Pentaborane 10.40
3-Methyl-1-butene 9.51 Pentane 10.35
3-Methyl-2-butene 8.67 Perchloroethylene 9.32
3-Methylpentane 10.08 Pheneloic 8.18
4-Methylcyclohexene 8.91 Phenol 8.50
Maleic anhydride 10.80 Phenyl ether (diphenyl oxide) 8.82
Mesityl oxide 9.08 Phenyl hydrazine 7.64
Mesitylene 8.40 Phenyl isocyanate 8.77
Methane 12.98 Phenyl isothiocyanate 8.52
Methanethiol (methyl mercaptan) 9.44 Phenylene diamine 6.89
Methyl acetate 10.27 Phosgene 11.77
Methyl acetylene 10.37 Phosphine 9.87
Methyl acrylate 9.90 Phosphorus trichloride 9.91
Methyl alcohol 10.85 Phthalic anhydride 10.00
Methyl amine 8.97 Propane 11.07
Methyl bromide 10.54 Propargyl alcohol 10.51
Methyl butyl ketone 9.34 Propiolactone 9.70
Methyl butyrate 10.07 Propionaldehyde 9.98
Methyl cellosolve 9.60 Propionic acid 10.24
Methyl chloride 11.28 Propionitrile 11.84
Methyl chloroform (1,1,1-trichloroethane) 11.00 Propyl acetate 10.04
Methyl disulfide 8.46 Propyl alcohol 10.20
Methyl ethyl ketone 9.53 Propyl amine 8.78
Methyl formate 10.82 Propyl benzene 8.72
Methyl iodide 9.54 Propyl ether 9.27
Methyl isobutyl ketone 9.30 Propyl formate 10.54
Methyl isobutyrate 9.98 Propylene 9.73
Methyl isocyanate 10.67 Propylene dichloride 10.87
Methyl isopropyl ketone 9.32 Propylene imine 9.00
Methyl isothiocyanate 9.25 Propylene oxide 10.22
Methyl mercaptan 9.44 Propyne 10.36
Methyl methacrylate 9.70 Pyridine 9.32
Methyl propionate 10.15 Pyrrole 8.20
Methyl propyl ketone 9.39

-Methyl styrene 8.35 Quinone 10.04
Methyl thiocyanate 10.07

Methylal (dimethoxymethane) 10.00 Stibine 9.51
Methylcyclohexane 9.85 Styrene 8.47
Methylene chloride 11.32 Sulfur dioxide 12.30
Methyl-n-amyl ketone 9.30 Sulfur hexafluoride 15.33
Monomethyl aniline 7.32 Sulfur monochloride 9.66
Monomethyl hydrazine 7.67 Sulfuryl fluoride 13.00
Morpholine 8.20

n-Methyl acetamide 8.90 o-Terphenyls 7.78

N

1-Nitropropane 10.88 1,1,1-Trichloroethane 11.00
2-Nitropropane 10.71
Naphthalene 8.12 2,2,4-Trimethyl pentane 9.86
Nickel carbonyl 8.27 o-Toluidine 7.44
Nitric oxide, (NO) 9.25 Tetrachloroethane 11.62
Nitrobenzene 9.92 Tetrachloroethene 9.32
Nitroethane 10.88 Tetrachloromethane 11.47
Nitrogen 15.58 Tetrahydrofuran 9.54
Nitrogen dioxide 9.78 Tetrahydropyran 9.25
Nitrogen trifluoride 12.97 Thiolacetic acid 10.00
Nitromethane 11.08 Thiophene 8.86
Nitrotoluene 9.45 Toluene 8.82
p-Nitrochloro benzene 9.96 Tribromoethene 9.27

O

Octane 9.82 Tribromomethane 10.51
Oxygen 12.08 Trichloroethene 9.45
Ozone 12.08 Trichloroethylene 9.47

P

1-Pentene 9.50 Trichloromethane 11.42
1-Propanethiol 9.20 Triethylamine 7.50
2,4-Pentanedione 8.87 Trifluoromonobromo-methane 11.40

Chemical Name
(P continued)

Q
S

T

Tribromofluoromethane 10.67

Trichlorofluoromethane (Freon 11) 11.77

1,1,2,2-Tetrachloro-1,2-difluoroethane (Freon 112)

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)

11.30

11.78

34

MEDA

IP (eV)

IP (eV)

IR

2200

ENMET Corporation

Chemical Name
(T continued)

Trimethyl amine 7.82 Water 12.59
Tripropyl amine 7.23

V

o-Vinyl toluene 8.20 m-Xylene 8.56
Valeraldehyde 9.82 o-Xylene 8.56
Valeric acid 10.12 p-Xylene 8.45
Vinyl acetate 9.19
Vinyl bromide 9.80
Vinyl chloride 10.00
Vinyl methyl ether 8.93

2,4-Xylidine 7.65

Chemical Name
W

X

Notes:

35

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

734.761.1270 Fax [phone]

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.

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: _______________________

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___________________________________

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

Your Shipping Address:

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: $_________________