ENMET MedAir 2200 User manual

ENMET
680 Fairfield Court
Ann Arbor, MI 48108
734.761.1270 Fax [phone]
www.enmet.com
MedAir 2200
Operation and Maintenance Manual

MedAir
ENMET
Manual Release Date – June 9, 2017
Page | 1
Manual Part No. – 80002-042
Table of Contents
1.0 INTRODUCTION.................................................................................................................................................................................................3
1.1 Unpack................................................................................................................................................................................................................................3
1.2 Check Order........................................................................................................................................................................................................................3
1.3 Serial Numbers....................................................................................................................................................................................................................3
2.0 INSTRUMENT FEATURES....................................................................................................................................................................................4
2.1 Exterior Features.................................................................................................................................................................................................................4
2.2 Display Panel Features........................................................................................................................................................................................................4
2.3 Circuit Board Features ........................................................................................................................................................................................................6
3.0 INSTALLATION..................................................................................................................................................................................................7
3.1 Mounting of Instrument.......................................................................................................................................................................................................7
3.2 Sample Air Supply..............................................................................................................................................................................................................8
3.3 Power Supply......................................................................................................................................................................................................................8
3.4 Outputs................................................................................................................................................................................................................................8
3.4.1 Relay Contacts.............................................................................................................................................................................................................9
3.4.2 Optional 4-20mA Outputs..........................................................................................................................................................................................10
3.5 Installation Verification.....................................................................................................................................................................................................10
4.0OPERATION ....................................................................................................................................................................................................11
4.1 Normal Operation Condition.............................................................................................................................................................................................11
4.2 Alarm Set Points ...............................................................................................................................................................................................................11
4.3 Alarm Latching or Differential Settings............................................................................................................................................................................12
4.4 Audio Defeat.....................................................................................................................................................................................................................12
4.5 Display..............................................................................................................................................................................................................................12
4.6 Operational Menu..............................................................................................................................................................................................................13
4.7 Fault Indications................................................................................................................................................................................................................13
4.7.1 Low Flow Indication..................................................................................................................................................................................................14
4.7.2 Other Fault Indications .............................................................................................................................................................................................14
4.8 Dew Point Sensor Response..............................................................................................................................................................................................14
4.9 Hydrocarbon Sensor Response..........................................................................................................................................................................................14
5.0 MAINTENANCE ...............................................................................................................................................................................................15
5.1 Cleaning Instructions.........................................................................................................................................................................................................15
5.2 Maintenance Menu............................................................................................................................................................................................................15
5.2.1 Accessing Maintenance Menu....................................................................................................................................................................................15
5.2.2 Maintenance Menu Flow Chart.................................................................................................................................................................................16
5.3 Calibration for CO, O2, HC and CO2 (Gas Channels) ........................................................................................................................................................17
5.3.1A Low Cal/ZeroCal Adjust..........................................................................................................................................................................................18
5.3.1B High Cal/SpanGas Adjust .......................................................................................................................................................................................18
5.3.2 Set 4 –20mA Transmitter Scale..................................................................................................................................................................................19
5.3.3 Set Alarm Points........................................................................................................................................................................................................20
5.3.4 Set Alarm Delay.........................................................................................................................................................................................................22
5.3.5 Relay Configuration ..................................................................................................................................................................................................23
5.3.6 Failsafe Configuration...............................................................................................................................................................................................24
5.3.7 Set Output Span Range..............................................................................................................................................................................................24
5.3.8 Set New Password .....................................................................................................................................................................................................25
5.3.9 Exit Maintenance Menu.............................................................................................................................................................................................25
5.4 Sensor Replacement..........................................................................................................................................................................................................26
5.4.1 Oxygen / Gas Sensor..................................................................................................................................................................................................26
5.4.2 Calibration/Sensor Replacement...............................................................................................................................................................................26
5.4.3A Low Cal/ZeroCal Adjust..........................................................................................................................................................................................28
5.4.3B High Cal/SpanGas Adjust .......................................................................................................................................................................................28
5.5 Dew Point Sensor..............................................................................................................................................................................................................29
5.6 Flow Control Orifice / Pre-filter........................................................................................................................................................................................29
6.0 TECHNICAL DATA AND SPECIFICATIONS.......................................................................................................................................................... 30
7.0 REPLACEMENT PART NUMBERS ......................................................................................................................................................................31
7.1 ENMET part numbers for sensors and replacement parts: ................................................................................................................................................31
7.2 ENMET part numbers for Calibration equipment: ............................................................................................................................................................31
APPENDIX A: CO CHARACTERISTICS.................................................................................................................................................................... 34
APPENDIX B: GAS IONIZATION POTENTIALS..........................................................................................................................................................35

MedAir
ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
List of Figures
Figure 1: External Features of the MedAir 2200.............................................................................................................................................. 5
Figure 1A: Sample Air Hose and Regulator..................................................................................................................................................... 5
Figure 2: MedAir 2200 Interior Features.......................................................................................................................................................... 6
Figure 3: MedAir 2200 Mounting Dimensions................................................................................................................................................. 7
Figure 2A: Relay, Input and Output Terminals ................................................................................................................................................ 8
Figure 4: MedAir 2200 Operational Display.................................................................................................................................................. 11
Figure 5: MedAir 2200 Operation Menu Flow Chart..................................................................................................................................... 13
Figure 6: MedAir 2200 Maintenance Menu Flow Chart................................................................................................................................. 16
Figure 7: Connection of Calibration Gas Cylinder......................................................................................................................................... 18
Figure 9: Location of Gas Sensor and Dew Point Manifolds.......................................................................................................................... 26
Figure 7: Connection of Calibration Gas Cylinder......................................................................................................................................... 28
Figure 10: Carbon Monoxide Concentration.................................................................................................................................................. 34
List of Tables
Table 1 : Relay Failsafe Settings ...................................................................................................................................................................... 9
Table 2: Sensor Output................................................................................................................................................................................... 10
Table 3: Typical Factory Alarm Set Points..................................................................................................................................................... 11
Table 4: Factory Set Gas alarms Delay........................................................................................................................................................... 22
Reference Information:
NOTE: [important information about use of instrument]
CAUTION:[affects equipment – if not followed may cause damage to instrument, sensor etc…]
WARNING:[affects personnel safety – if not followed may cause bodily injury or death.]
Attention / Warning
Earth Ground
!

MedAir
ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
1.0 Introduction
The MEDAIR 2200 is a compressed air monitoring instrument that measures and detects certain hazards in medical air 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:
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
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.
NOTE:All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the MEDAIR 2200 and examine it for shipping damage. If such damage is observed, notify both ENMET customer service
personnel and the commercial carrier involved immediately.
Regarding Damaged Shipments
NOTE:It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor any claims for
damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in good
condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and request
immediate inspection of the carton and the contents.
After the inspection and after you have received written acknowledgment of the damage from the carrier, contact ENMET
Customer Service for return authorization and further instructions. Have your Purchase Order and Sales Order numbers
available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage, usually
$100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping company
when asked to do so in writing by our customer. If you need your shipments insured, please forward a written request to
ENMET Customer Service.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days of receipt at
the following address: ENMET
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the MEDAIR 2200 is received as ordered. If there are
accessories on the order, ascertain that they are present. Check the contents of calibration kits. Notify ENMET customer service
personnel of any discrepancy immediately.
1.3 Serial Numbers
Each MEDAIR 2200 is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.

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ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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
An engineered thermoplastic box, approximately 10x8x6, with a clear hinged front cover.
Input Port
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
A loud horn activated by certain alarm conditions.
Mounting Flanges
Flanges with holes for mounting the enclosure to a vertical surface.
Sample Air Hose
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.
NOTE: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
A 2 line, 16 character per line, LCD with backlight.
The numerical values of gas concentrations, and other information are displayed.
Visual
Alarms & Indicators
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
Pushbutton Switches
There are three of these, located near the center of the panel; they are yellow
rectangular membrane switches. They are:
•O
PTION
Switch
The top left switch.
•S
ELECT
Switch
Directly to the right of the
OPTION
switch.
•Audio Defeat / Alarm
Acknowledge
Switch
Directly below the
OPTION
switch.

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ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
Figure 1: External Features of the MEDAIR 2200
*NOTE: Typical gas reading & alarm locations, depending on instrument configuration, alarms & readings may be in alternate
locations
Sample Air Hose, 5ft Supplied with Monitor
Example of Regulator, Not Supplied with Monitor
Figure 1A: Sample Air Hose and Regulator
N
OTE
:Typical facility airline pressures range from about 55 to 125
PSI
. The outlet pressure of the
regulator can be connected to the inlet of the MEDAIR 2200 and should be set at 55 PSI,±5PSI.
Regulator not supplied with the monitor
O
2
%
CO
ppm
Front Cover Latch
Male Quick Release Fitting
Input Port
Sample/Calibration
See note below
Audio Alarm
Fault LED
SELECT
Switch
Power LED
OPTION
Switch
A
LARM
ACKNOWLEDGE/
ALARM DEFEAT
Switch
*Visual Alarm O2
(If Oxygen option is installed)
See *note below
*Visual Alarm CO
(See *note below)
Mounting Flanges
2 places
Dew
Point
*Visual Alarm
Dew Point
(If Dew Point option is
installed)
See *note below
Display, see *note below
CO reading O2reading
Dew Point reading
Channel #1
Channel #3
Channel #4
Channel #2
Visual Alarm 2
ALARM
Female Quick Release
to Inlet Port to M
ED
A
IR
2200
¼”
N
OTE
:When connecting to a standard 55
PSI
USA Medical air system, Regulator is Not required.
Male¼” NPT Fitting
To Air System
Female Quick Release
to Sample Port

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ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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
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.
Output Terminals
One 4-20mA output per active channel. 2 channels/outputs per connector.
Sensor Manifold
The sample manifold, the carbon monoxide, carbon dioxide and oxygen sensors are
located under this housing.
Dew Point Manifold
The dew point sensor is installed into this housing.
Figure 2: MEDAIR 2200 Interior Features
Power Input
Terminal J23
Audio
Alarm
Sensor Dew Point
If Dew Point option is
installed
Relay Terminals
(6 places)
Aux Terminals
Optional (2 places)
Dew Point Terminal
Optional
Horn Terminal
Fuse Holders
0.630 Amp
(2 places)
Flow Sensor
Sensor
Manifold
Digital
Communication
Ground Screw
J21
Dew Point Manifold
If Dew Point option is
installed
4 – 20mA Output
Terminals
4 places

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Manual Part No. – 80002-042
3.0 Installation
3.1 Mounting of Instrument
The MEDAIR 2200 should be located near the pipe or tank containing the air to be monitored, and upstream from where the air is
being used. The MEDAIR 2200 must be installed such that it samples the compressed air before it 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 MEDAIR 2200 to a drywall/sheetrock surface.
Dimensions are in inches. Figure 3: MEDAIR 2200 Mounting Dimensions
Mounting Holes
0.31” dia. 4 places

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ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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.
WARNING: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 AUDIO DEFEAT / ALARM 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.
Figure 2A: Relay, Input and Output Terminals
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
Connector
Dew Point
Connector
4-20mA Input
Connector
4-20mA Input
Connector 2
Channel 3 & 4
4
-20mA
Ot t
Connector 1
Channel 1 & 2
4
-20mA Output
Connector RS485
Connector RS232
Connector RS485
Ground Screw J21
Power Input
Terminal J23
!

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ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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 non-latching 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
Position
Failsafe-Alarm
Non-Failsafe-Alarm
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.
Channel 1
Channel 2
Channel 3
Channel 4
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 MEDAIR 2200. Place a hole in the enclosure for a
wire exit, and use appropriate cable fittings. Be sure to note the location and depth of hardware inside the enclosure.

MedAir
ENMET
Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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 cannot be calibrated in the field.

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Manual Part No. – 80002-042
4.0 Operation
4.1 Normal Operation Condition
With the MEDAIR 2200 installed as described in Section 3, and in clean air, the POWER green LED is on, the display is lit and the
information on the display is as shown in Figure 4 Display, for the sensor(s) installed in the MEDAIR 2200.The red alarm and
fault LEDs are not lit.
Example of display with CO(ch 1), Dew Point((ch 2), Oxygen(ch 3) and CO2(ch 4)options installed
Figure 4: MEDAIR 2200 Operational Display
4.2 Alarm Set Points
There are two alarm set points for each installed channel of the MEDAIR 2200. The factory settings of these alarm set points are
shown in Table 3. Table 3: Typical Factory Alarm Set Points
Typical Channel #
Gas
Alarm 1, Flashing LED
Alarm 2, Steady LED
1
Carbon Monoxide
10 ppm
20 ppm
2
Dew point
35°Fahrenheit at 55
PSIG
50°Fahrenheit at 55
PSIG
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
The 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 MEDAIR 2200 staying in alarm condition until after the measured reading has
returned past the alarm point by the differential value. Example: If the alarm set point is Λ10 and the differential is 2, the
MEDAIR 2200 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.
CO 0 O2 20.9
DP -20 CO2 300
CO
PPM
O
2
%
DEW
POINT
CO2
PPM

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Manual Release Date – June 9, 2017
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Manual Part No. – 80002-042
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
IN THE LATCHING MODE: at the cessation of the condition which causes an alarm, the alarm indications do not cease, and the
alarm relay contacts do not revert to the non-alarm state, until the AUDIO DEFEAT /ALARM ACKNOWLEDGE switch is pressed.
An alarm can also be acknowledged by pressing the switch during the alarm condition; then at the cessation of the alarm
condition, alarm indications cease and alarm relays revert to the non-alarm state. After an alarm is acknowledged, alarms in
the latching configuration are re-armed to latch at the next alarm condition.
IN 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 MEDAIR 2200 staying in alarm condition until after the measured reading
has returned past the alarm point by the differential value. Example: If the alarm point is Λ10 and the differential is 2, the
MEDAIR 2200 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.
4.4 Audio Defeat
Pressing the AUDIO DEFEAT /ALARM ACKNOWLEDGE switch during an alarm temporarily silences the audio alarm. 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.
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 OPTION and SELECT switches.
Concentrations of CO and CO2are 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”.

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Manual Part No. – 80002-042
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 OPTION and SELECT switches. The operational menu flow chart is shown in Figure 5,
Pressing the OPTION switch is indicated with a "O"
Pressing the SELECT 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.
Figure 5: MEDAIR 2200 Operation Menu Flow Chart
O
S
CH-1 CH-3
CH-2 CH-
4
O = Press Option switch
S= Press Select switch
O
No
Function
ΛL10 A1 vL19.5
vL-40 ΛD 500
O
No
Function
S
S
ΛL20 A2 Λ23.5
Λ
L39 Λ1000
O
No
Function
S
Enter Maint Menu
Enter Password
_
See Maintenance Menu Diagram
O
Sfor each active channel
CH1 SCALE (CO)
0 – 50 PPM
S
CH3 SCALE (O2)
0.0 – 30.0 %
CH2 SCALE (DP)
-112 – 68 F
S
CH4 SCALE (CO2)
0 – 5000 PPM
S
O
O
O
Displays are examples of gases:
Channel 1 = Carbon Monoxide
Channel 2 = Dew Point
Channel 3 = Oxygen
Channel 4 = Carbon Dioxide
[- 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 Lpresent) – Indicates alarm
is in non-latching mode.
Displays are examples of Alarms
D– Indicates alarm is in
Differential Setting.
(no Dpresent) – Indicates alarm
is in Standard Setting.
ALARM 1 Delays
(Seconds)
O
S
No
Function
S
50 mASPAN 30.0
68 5000
O
No
Function
5 5
5 5
Alternating
S
Relays 123456
[
=ON
[[[[[[
O
No
Function

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Manual Release Date – June 9, 2017
Page | 14
Manual Part No. – 80002-042
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 MEDAIR 2200 that it takes more time to extract moisture from a sample by passing dry air 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 MEDAIR 2200
is no different. It may take up to 12 hours to establish moisture equilibrium when the 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.
4.9 Hydrocarbon Sensor Response
If a Hydrocarbon (HC) sensor is supplied with the MEDAIR 2200 instrument, it designed to detect hydrocarbon gases 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.

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Manual Release Date – June 9, 2017
Page | 15
Manual Part No. – 80002-042
5.0 Maintenance
The MEDAIR 2200 requires periodic sensor calibration and replacement. Calibration of toxic gas and oxygen sensor 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 CO2sensor 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
CAUTION:Never spray a cleaning solution on the surfaces of the MEDAIR 2200 devices.
Clean the exterior of the MEDAIR 2200 enclosures with a mild soap solution on a clean, damp cloth. Do not soak the 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 MEDAIR 2200 maintenance menu is accessed by entering the proper password with the OPTION and SELECT 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 OPTION switch until “Enter Maint Menu” is displayed then press SELECT switch for
the Enter Password menu. Enter the valid password as described below.
In the "Enter Maint Menu" position
Press the SELECT switch "Enter Password ζ0" is displayed. Press SELECT switch once, to move cursor to next digit, this
will be the first digit of the password.
In the ζ000 position, the underline cursor is under the left digit.
Press the OPTION switch to change the left digit; select the correct digit.
Press the SELECT 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 "Calibration" portion of the menu. If an invalid password is inserted you are returned to the Enter Maint
Menu display.
Example: Password Display (with factory installed password entered) and Flow Chart below.
To Calibration
See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.
Enter Password
1270
CO
PPM
O
2
%
O = Option Switch
S = Select Switch
DEW
POINT
O
S
S
Enter Password
ζ0000
Enter Maint Menu
Changes digit indicated by underscore cursor
Locks underscored digit and moves cursor to next digit
O(6)
Valid
Invalid
!

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ENMET
Manual Release Date – June 9, 2017
Page | 16
Manual Part No. – 80002-042
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 OPTION switch 6 times; "Enter MAINTENANCE Menu" is displayed.
Figure 6: MEDAIR 2200 Maintenance Menu Flow Chart.
O = Press Option
S= Press Select
O
S
MAINTENANCE MENU
Exit maint menu
Press OPTION to return to top of maintenance menu.
Press SELECT to return to operational menu.
See Section 5.3.9 for instructions on how to exit Maintenance Menus.
To/From
Operational
Display
From Operational Menu
Press O
PTION
(6 times)
S
Enter Maint Menu
O
S
Enter Password
0000
Changes digit indicated by underscore cursor
Locks underscored digit and moves cursor to next digit
O(6)
Valid
Invalid
O
S
MAINTENANCE MENU
Set New Password
Password
XXXX
O
S
Changes digit indicated by underscore cursor
Locks underscored digit and moves cursor to next digit
See Section 5.3.8 for changing password instructions.
O
S
Calibration
Select (Gas)
MAINTENANCE MENU
Calibration
Press OPTION until the channel to be Calibrated is displayed
See Section 5.3 for calibration instructions.
O
S
MAINTENANCE MENU
Set Alarm1
Alarm 1
Select: XX
Press OPTION until the gas alarm to be Set is displayed
See Section 5.3.3 for setting alarms instructions.
O
S
Alarm 2
Select: XX
MAINTENANCE MENU
Set Alarm2
Press OPTION until the gas alarm to be Set is displayed
See Section 5.3.3 for setting alarms instructions.
O
S
MAINTENANCE MENU
Set Alarm Delays
Alarm Delay
Select: XX
Press OPTION until the gas alarm delay to be Set is displayed
See Section 5.3.4 for setting alarms instructions.
O
S
MAINTENANCE MENU
Configure Alarms
Ch 1, 2, 3, 4
R1 L
Pressing OPTION changes letter indicated by underscore cursor
See Section 5.3.5 for configuring relay instructions.
O
S
MAINTENANCE MENU
Relay Failsafes
Relay Failsafes
R:1 Failsafe ON
Pressing OPTION changes Failsafe setting from ON to OFF
See Section 5.3.6 for configuring relay failsafe instructions.
MAINTENANCE MENU
Scale mA Xmtrs
Press OPTION until gas to be Set-Up is displayed
See Section 5.3.2 for transmitter set-up instructions.
If installed
Scale mA Xmtrs
Select (Gas)
O
S
O
S
MAINTENANCE MENU
mA Output Span
mA Output Span
Select: (Gas)
Press OPTION until the gas span to be Set is displayed
See Section 5.3.7 for output span instructions.

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Manual Release Date – June 9, 2017
Page | 17
Manual Part No. – 80002-042
5.3 Calibration for CO, O2, HC and CO2 (Gas Channels)
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 to calibrate the MEDAIR 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 quick-disconnect 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 MEDAIR 2200 sensor before initial calibration. It is not necessary to
open the Front Panel to make adjustment. The calibration functions are operated through the OPTION and SELECT switches on the
front panel.
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 SELECT switch "Calibration Select XX" is displayed. XX = the gas to be calibrated
Press the OPTION switch, if needed, to change to the gas to be calibrated.
Press the SELECT switch, the gas & current readings 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 to next section, Press the OPTION switch.
Press OPTION switch until “Exit Maint Menu” appears and then press SELECT switch to return the instrument to the
Operational Display
Example: Full Calibration Flow Chart, for CO
From Valid Password Entry
NOTE:The dew point sensor/probe cannot be calibrated in the field and should be replaced every two years.
O
S
S
Calibration
Select (Gas)
MAINTENANCE MENU
Calibration
O Press O PTION until the gas to be
Calibrated is displayed
CO:
XX
11
LowCal: 0000
S each digit
CO:
XX
14
HiCal: 0000
S each digit
Default Calibration Points
Gas
LowCal
HiCal
CO
0
20
O2
N/A
20.9
CO2
0
1000
HC
0
10
O = Press Option
S= Press Select

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Manual Release Date – June 9, 2017
Page | 18
Manual Part No. – 80002-042
Figure 7: Connection of Calibration Gas Cylinder
5.3.1A Low Cal/ZeroCal Adjust
A Low Cal function should be performed only when the MEDAIR 2200 sensor are exposed to clean uncontaminated 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 OPTION switch, until the maintenance menu is displayed. See Figure 6,
MEDAIR 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 hold OPTION switch until the Maintenance Menu is displayed then release.
Then press OPTION switch until “Exit maint menu” appears and then press SELECT switch to return the instrument to the
Operational Display
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 OPTION switch.
Press OPTION switch until “Exit maint menu” appears and then press SELECT switch to return the instrument to the
Operational Display
Cylinder of Gas
Cylinder Valve
and Regulator
Calibration/Sample
Port

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Manual Release Date – June 9, 2017
Page | 19
Manual Part No. – 80002-042
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 SELECT switch
Press the SELECT switch "mA Xmter Scale: Select XX" is displayed. XX = the gas to be set up.
Press the OPTION switch, if needed, to change to the gas to be set up.
Press the SELECT switch, “Ch#: mAXmter: 4mA: 0000” is displayed
Press the SELECT switch, that moves the cursor one digit to the right when the last digit is accepted the display move to the
full Scale mA Xmtrs menu
Press the SELECT switch, “Ch#: mAXmter: 20mA: 0000” is displayed
Press the SELECT switch, that moves the cursor one digit to the right when the last digit is accepted the display will return
to the Scale mA Xmtrs menu
Repeat these steps for each 4 –20mA transmitter.
Press OPTION switch until “Exit maint menu” appears and then press SELECT switch to return the instrument to the
Operational Display
Example: Sensor/Transmitter Set Up Flow Chart
1 NOTE: Press OPTION do not press SELECT, Consult the factory prior to selecting SELECT.
2 NOTE: Consult the factory before entering or making any adjustments.
O Θ1
S
SΘ2
mA Xmtr Scale
Select (Gas)
MAINTENANCE MENU
Scale mA Xmtrs
O Press O PTION until the gas to be
Set Up is displayed
CH#: XX mA Xmter
4mA: 0000
S each digit
CH#: XX mA Xmter
20mA: 0000
S each digit
Example: Set up values
DP
-112F
68F
O = Press Option
S= Press Select