AM-5175 Ambient Air Monitor Operation &

ENMET
680 Fairfield Court
Ann Arbor, MI 48108
734.761.1270 Fax 734.761.3220
www.enmet.com
AM-5175
Ambient Air Monitor
Operation & Maintenance Manual
AM-5175
ENMET
Table of Contents
1.0 INTRODUCTION ........................................................................................................................................................................................................... 2
1.1 Unpack ................................................................................................................................................................................................................... 2
1.2 Check Order ........................................................................................................................................................................................................... 2
1.3 Serial Numbers ....................................................................................................................................................................................................... 2
2.0 COMPONENTS OF THE AM-5175................................................................................................................................................................................. 3
2.1 AM-5175 elements ................................................................................................................................................................................................. 3
2.2 AM-5175 Operational Features .............................................................................................................................................................................. 3
2.3 Circuit Board Features ........................................................................................................................................................................................... 4
Description ................................................................................................................................................................................................................... 4
3.0 INSTALLATION OF THE AM-5175 ............................................................................................................................................................................... 5
3.1 Mounting AM-5175 ............................................................................................................................................................................................... 5
3.1.1 Wiring the AM-5175 ....................................................................................................................................................................................... 6
3.1.2 Power Supply .................................................................................................................................................................................................. 6
3.3 Relay Contacts ....................................................................................................................................................................................................... 7
4.0 OPERATION ................................................................................................................................................................................................................. 8
4.1 Start Up AM-5175.................................................................................................................................................................................................. 8
4.1.1 Typical Start Up .............................................................................................................................................................................................. 8
4.2 Normal Display Mode ............................................................................................................................................................................................ 9
4.2.1 Alarm Conditions AM-5175 ............................................................................................................................................................................ 9
5.0 MAINTENANCE .......................................................................................................................................................................................................... 10
5.1 Maintenance Menus ............................................................................................................................................................................................. 10
5.2 Calibration of the AM-5175 ................................................................................................................................................................................. 12
5.2.1 Exit Maintenance Menu ................................................................................................................................................................................ 13
5.2.2 Zero Adjust.................................................................................................................................................................................................... 13
5.2.3 Gas Span ....................................................................................................................................................................................................... 14
5.2.4 Alarm Set Points ........................................................................................................................................................................................... 15
5.3 Sensor Replacement ............................................................................................................................................................................................. 16
5.3.1 A Factory calibration must be performed. .................................................................................................................................................... 16
6.0 ACCESSORY AND REPLACEMENT PARTS .................................................................................................................................................................. 17
7.0 TECHNICAL DATA AND SPECIFICATIONS .................................................................................................................................................................. 17
8.0 TERMS AND CONDITIONS .......................................................................................................................................................................................... 18
8.1 Ordering Information ........................................................................................................................................................................................... 18
8.2 Delivery................................................................................................................................................................................................................ 18
8.3 Payment Terms..................................................................................................................................................................................................... 18
8.4 Warranty Information and Guidelines .................................................................................................................................................................. 18
8.5 Return Policy........................................................................................................................................................................................................ 18
9.0 INSTRUCTIONS FOR RETURNING AN INSTRUMENT FOR SERVICE .............................................................................................................................. 19
List of Figures
Figure 1: External AM-5175 Feature................................................................................................................................................................................ 3
Figure 2: AM-5175 Circuit Board Features ...................................................................................................................................................................... 4
Figure 3: Mounting AM-5175 .......................................................................................................................................................................................... 5
Figure 4: Power Terminal Connections AM-5175............................................................................................................................................................ 6
Figure 5: Relay Terminal Connections AM-5175 ............................................................................................................................................................ 7
Figure 6: AM-5175 Maintenance Menu Flow Chart ...................................................................................................................................................... 11
Figure 7: Calibration Adapter ......................................................................................................................................................................................... 12
Figure 8: AM-5175 Sensor Replacement ....................................................................................................................................................................... 16
List of Tables
Table 1: Relay Failsafe Settings ....................................................................................................................................................................................... 7
Table 2: AM-5175 Maintenance Menus Sequence ......................................................................................................................................................... 10
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.]
Earth Ground
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |1
AM-5175
ENMET
1.0 Introduction
The AM-5175 is an ambient air monitoring instrument that measures and detects gases utilizing electrochemical sensor. The AM5175 is NOT in an enclosure rated for use in a Class I, Div. 1, Groups B, C, D classified area and cannot be installed in a hazardous
location.
Features of the AM-5175:
 continuous monitoring of the ambient 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
 alarm acknowledgement capability including audio defeat
 mA outputs for target gas
NOTE: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the AM-5175 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 ENMET 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:
o 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.
o 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. Please 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
734-761-1270 Fax 734-761-3220
Toll Free: 800-521-2978
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the AM-5175 is received as ordered. Each AM-5175 is
labeled with its target gas. If there are accessories on the order, ascertain that they are present. Check the contents of calibration
kits. Notify ENMET customer service personnel of any discrepancy immediately.
1.3 Serial Numbers
Each AM-5175 is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |2
AM-5175
ENMET
2.0 Components of the AM-5175
2.1 AM-5175 elements
See Figure 1 for location of elements:
Feature
Enclosure
Front Cover
Description
A polycarbonate box, approximately 7 x 5 x 3, with a detachable front cover.
4 holes for mounting the enclosure to a vertical surface. Located at the corners of the bottom of
the enclosure, directly beneath the 4-front cover retaining screws. See Figure 3
Detachable front cover of AM-5175 with Display Panel. See Section 2.2 and Figure 1
There are 4 Screws that hold the front cover in place.
2.2 AM-5175 Operational Features
The Display Panel is attached by a cable and is released by unscrewing the 4 screws located in the corners. After releasing the
panel, it is swung upward, exposing the interior of the enclosure. See Figure 1 for location of features.
Feature
Display
Audio Alarm(Horn)
Visual:
Indicators and Alarms
Membrane Switches
Description
A single line, 8-character LCD with backlight. Indicates the level of gas detected by sensor.
The numerical value of gas concentration and other information is displayed.
Audio alarm (105 dB at 30cm/12in). The audio alarm is activated when the unit is in alarm.
LED indicators:
Power / Fault Indicator LED, Green / Red
Alarm (3) Indicator LED, Red
2 Pushbutton Switches on front panel control the instrument maintenance functions. The
pushbutton switch locations are indicated by:
Advances the instrument display through operation information and maintenance menus
SELECT: Disables audio alarm temporally and
Selects the maintenance menu operations such as, Zero, Span, Exit menu or sets
proper calibration values for Zero or Span
See Section 4.0 and 5.0 for operational and maintenance flow charts.
Three alarm points are preprogrammed into the AM-5175. At each alarm point, an LED on the front panel is activated. There are
4, 10 Amp relay contacts at each alarm point, plus a fault relay. See Section 3.2 for wiring information.
Visual Indicator
Power/Fault
Sensor
Visual Indicators:
Alarm1, Alarm2, Alarm3
Remote Wiring Access
Menu
Select
Audio Alarm
Front Cover
Retaining Screws - 4
places
Power Wiring
Strain Relief
Figure 1: External AM-5175 Feature
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |3
AM-5175
ENMET
2.3 Circuit Board Features
The Display Panel is attached by a cable and is released by unscrewing the 4 screws located in the corners. After releasing the
panel, it is swung upward, 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
Relay Terminals:
J14, J15, J16, J17
Terminal J12
Sensor Terminal J8
Data Terminal J19
Potentiometer 2, 3 & 4
Description
This group of terminals is located on the Circuit Board.
For the contacts for each of three alarm relays, and for the contacts of a fault relay.
See Section 3.3
For VDC back-up power in and the 4-20 mA output. See Section 3.1.2
Sensor connection, See Section 3.2
RS-485 input/output
Not used in AM-5175 Do Not Adjust
RS-485 Input/ Output
Terminal J19
Relay Terminals
J14, J15, J16, J17
Relays
K1, K2, K3, K4
Terminal J12
DC Power In
4-20mA Output
Sensor Connection
Terminal J8
Figure 2: AM-5175 Circuit Board Features
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |4
AM-5175
ENMET
3.0 Installation of the AM-5175
The AM-5175 is supplied with a strain relief and a standard U.S. 3 prong power line cord.
NOTE: This control panel is NOT rated for hazardous locations. The control panel must be located in a Non-Hazardous area.
3.1 Mounting AM-5175
Mount the AM-5175 instrument on an appropriate vertical surface, leaving room for lid to be opened, using the mounting holes
provided. Avoid areas with excessive vibration or temperature extremes. The holes in the bottom of the enclosure are 0.18 inch in
diameter and form a 6.44 x 4.47rectangle. See Figure 3
It is recommended to use #8 drywall anchors and screws for mounting the AM-5175 to a drywall/sheetrock surface.
Access for Sensor / Remote Sensor Wiring
Right Side
Dimensions are in inches.
Figure 3: Mounting AM-5175
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |5
AM-5175
ENMET
3.1.1 Wiring the AM-5175
The electrical installation should conform to appropriate electrical codes, such as the National Electrical Code in the United
States.
WARNING: The compliance of the installation to appropriate codes is not ENMET’s responsibility.
The AM-5175 should be powered through circuit breakers provided for this purpose.
3.1.2 Power Supply
The input power can vary from 100 to 240 VAC, 50/60 Hz. Power should be connected to the Power Input Terminal TB1 and
the Ground screw. See Figure 4 for location. Instrument is supplied with a strain relief and a standard U.S. 3 prong power
line cord.
For DC wiring 24VDC may be wired to J12, (J12-1) position 1 + with ground connected to (J12-2) position 2.
Upon supplying power to the AM-5175:
 The green power on LED is lit.
 The display backlight is lit, and instrument will step through a start-up sequence: unit serial number and software revision
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 SELECT button. If alarm persists longer than 30 minutes, call ENMET customer service personnel.
WARNING: Continuous gas detection and alarm systems (110VAC/220VAC / 24VDC/12VDC powered) become inoperative upon loss of
primary power. Contact factory for specifications and pricing of backup battery systems.
AC Power Supply Terminal: TB1
Label on PCB
TB1 ACN
110VAC
TB1 ACL
Ground
Screw
220VAC
Optional
Ground
Screw
TB1 ACN
TB1 ACL
Function
Neutral
Line
AC GND
Cover Inside View
Opened Upward
Neutral
Line
AC GND
CAUTION: 110/220 VAC when applied
DC Power Supply/4-20mA
Terminal: J12
Position
Function
24 VDC power
1+
GND
2
4 - 20 mA out
3
Sensor Terminal: J8
Position
Function
Sensor
1+
Sensor Signal
2
Sensor Ground
3
Color
Red
White
Black
Caution: 110/220 Vac when
applied
Figure 4: Power Terminal Connections AM-5175
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |6
AM-5175
ENMET
3.3 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 5. The contact positions are noted on the circuit board next to
each terminal.
The following table is for the relays in their un-energized state. 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 Table 1 below:
Table 1: Relay Failsafe Settings
Alarm
Position
J14
(K1) Relay 1 - NO
Normally Open
J14
(K1) Relay 1 - NC
Normally Closed
J14
(K1) Relay 1 - COM Common
Alarm 1
Alarm 2
J15
J15
J15
(K2) Relay 2 - NO
Normally Open
(K2) Relay 2 - NC
Normally Closed
(K2) Relay 2 - COM Common
Alarm 3
J16
J16
J16
(K3) Relay 3 - NO
Normally Open
(K3) Relay 3 - NC
Normally Closed
(K3) Relay 3 - COM Common
Fault Alarm
J17
J17
J17
(K4) Relay 4 - NO
Normally Open
(K4) Relay 4 - NC
Normally Closed
(K4) Relay 4 - COM Common
These relay contacts can be used to operate auxiliary alarms or other functions. The relay contacts are DRY, power must be
supplied. It is recommended that power for auxiliary equipment be supplied from an independent power source separate from the
AM-5175. Use the existing hole in the enclosure for wire to enter and exit and use appropriate cable fittings. Wiring should be
grouped together, VAC wires should be separated for VDC wires.
Relay Terminals
J14, J15, J16, J17
Relays
K1, K2, K3, K4
Sensor Terminal J8
Figure 5: Relay Terminal Connections AM-5175
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |7
AM-5175
ENMET
4.0 Operation
When the AM-5175 is installed as described in Section 3, and in clean air, the POWER green LED is on, the display is lit and the
information on the display is measurement of the target detected by the AM-5175. The red alarm and fault LEDs are not lit.
4.1 Start Up AM-5175
When the AM-5175 is first powered up, it goes through a series of momentary screens, which identify the instrument model
number, serial number and software revision. After all of the momentary screens have been displayed, the instrument arrives at
the Main Gas Display showing the gas concentration and unit of measurement.
Depending on transmitter configuration and calibration condition, the furthest right character in the display may flash a letter
indicating the instrument status. See the Section 4.1.1 below
4.1.1 Typical Start Up
When power is supplied to the AM-5175, the instrument will display the following sequence of information:
Typical start up sequence of information displayed.
Example of Typical Start Up Display
Function
The instrument: Model AM-5175
AM-5175
Example for reference only
The instrument: Serial Number
312-1256
Example for reference only
The instrument: Software Revision
S/W X.X
IF the right most character is a flashing W
0ppW
The instrument is in Warm-up mode
This should last about 1 minute
The Signal Output is held at 4mA during warm-up
OR
20.9W
IF the right most character is a flashing C
0ppC
OR
The instrument has failed Calibration
The last good calibration values are retained, but the sensor may not
be responsive to gas
A new Calibration should be performed As Soon As Possible
20.9C
0ppm
The instrument: Normal Display Mode
Measurement of the target gas
OR
20.9%
NOTE: Software revision may cause variations of display output.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |8
AM-5175
ENMET
4.2 Normal Display Mode
When the AM-5175 is installed as described in section 3, and in clean air, the POWER green LED is on, the display is lit and the
information on the display in measurement units of ppm detected by the AM-5175. The red alarm and fault LEDs are not lit.
To advance through displays of operational information press the MENU button.
NOTE: Software revision may cause variations of display output.
See sequence of operational information below:
Display Measurement of the target gas
Press MENU button
Select
0ppm
Menu
Display indicates Alarm 1 Set point
Press MENU button
A1:
05
Select
10
Select
20
Select
50
Select
Menu
Display indicates Alarm 2 Set point
Press MENU button
A2:
Menu
Display indicates Alarm 3 Set point
Press MENU button
A3:
Press SELECT button
To temporally disable
audio alarm, see
Section 4.2.1
Menu
Display indicates mA Span range
(Full Scale)
Press MENU button
mA:
Menu
Display returns to gas measurent
Operational Display Flo w Chart
4.2.1 Alarm Conditions AM-5175
There are three alarm set points available. These alarm points are normally set at established safety levels, such as the OSHA
Permissible Exposure Limit (PEL) for toxic gases.
The alarm set points can be changed within limits; see the maintenance section of this manual for the procedure.
If the gas concentration increases above that of the alarm set point, the associated red LED is lit, the associated relay changes
state, and the audio alarm is activated.
Pressing the SELECT button can temporally disable the Audio Alarm. The horn will be disabled for about five minutes. If a
second alarm condition occurs during this time the horn will re-activate. If the alarm condition(s) have ended during this time
the horn will not re-activate.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P age |9
AM-5175
ENMET
5.0 Maintenance
The AM-5175 maintenance menus are accessed by pressing the MENU button and SELECT button as described in the maintenance
menu section.
5.1 Maintenance Menus
CAUTION: Do Not Attempt a Span Procedure Without Calibration Gas Applied to The Sensor; if this is done, the instrument is
forced into a calibration fault mode.
Pushbutton switches control the MENU and SELECT functions. The MENU and SELECT button locations are indicated on the
display panel, see Figure 1. The MENU button is used to display the various menu options and make incremental changes to
numbers such as alarm points, calibrations gas, etc. The SELECT button is used to select that option, set zero or span digit.
To enter the maintenance menu, press and hold the MENU button for 2 to 4 seconds
Table 2 indicates the maintenance menu sequence see Figure 6 for a detailed maintenance menu flow chart.
NOTE: Software revision may cause variations of display output.
Table 2: AM-5175 Maintenance Menus Sequence
Example of Display
Function
Measurement of CO
5ppm
Normal Display Mode
Press and hold the MENU button for 2 – 4 seconds to enter the Maintenance Menu
The Power/Fault LED will flash Green – Red to indicate the AM-5175 is in Maintenance Mode
To exit the maintenance Menu and return to the
Exit
Normal Display Mode:
If intended function Press SELECT button
Press the MENU button to advance to the Zero procedure
Not Present for Oxygen Units
For adjusting Zero:
If intended function Press SELECT button
Zero
Press the MENU button to advance to the Span procedure
For adjusting the Span:
If intended function Press SELECT button
Span
Press the MENU button to advance to each Alarm set point procedures
For adjusting the Alarm 1, 2 and 3 set points:
Alarm1
If Intended Function, Press SELECT button.
Alarm2
Alarm3
Press the MENU button to advance the mA Span set point procedure
For adjusting the mA Span set point:
If intended function Press SELECT button
mA Span
Pressing the MENU button without pressing the SELECT button will allow you to cycle through the menu options.
You must Press the SELECT button to initiate the desired operation.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 10
AM-5175
ENMET
NOTE: Software revision may cause variations of display output.
5ppm
Menu
Exit
Normal Gas Display
Press and Hold the Menu button for 2 – 4 seconds to enter the Maintenance Menus
Select
Press the Select button to return to the Normal Gas Display. See Section 5.2.1
Menu
Press the Menu button to cycle through Maintenance Menus
Select
Zero
PV:
If the Zero signal is within Preset Specs the AM-5175 will display Cal
OK, See Section 5.2.2
Bad ZERO
If the Zero signal is not within Preset Specs the AM-5175 will display
Bad ZERO
OR
Select
Span
Press the Select button to initiate Zero adjustment
Cal OK
Not Present for Oxygen Units
Menu
Select
0
PV:
0
20
Select
You can Press and Hold the Select button to change
the Calibration Gas Level
See Section 5.2.3
Menu
Select
Cal OK
OR
Same mV
OR
Apply Cal Gas until signal value becomes stable (about 1 to
4 minutes) See Figure 6
Press Select to enter the cal signal:
If cal is good display will indicate OK or Same
If cal is not within preset “range” display will indicate
Bad Sens
Bad Sens
Alarm1
SELECT
MENU
Λ 5
SetTDsec
0
Alarm2
SELECT
MENU
Λ 10
SetTDsec
0
Alarm3
SELECT
Λ 20
To change Alarm set points:
Press Menu switch until Alarm to be changed is displayed
Press Select switch to display the set point
The MENU switch: changes digit indicated by underscore cursor
The SELECT switch: locks in the underscored digit and moves to
next digit
If change is not within range display returns to first digit
If change is within range display moves to Set Time Delay
Use MENU and SELECT switches as above to change time delay.
Between 0 and 5 seconds is allowed
If change is within range display moves to next menu
See Section 5.2.4
Λ - Indicates increasing alarm
V - Indicates decreasing alarm
SetTDsec
MENU
0
mA Span
Select
To change mA Span set point:
Press Menu button until mA Span is displayed
Press Select button to display the set point
The Menu button changes digit indicated by underscore cursor
The Select button locks underscored digit and moves to next digit
See Section 5.2.5
50
Menu
To return to Normal Gas Display:
Press MENU button until EXIT is displayed
Then press SELECT button
Figure 6: AM-5175 Maintenance Menu Flow Chart
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 11
AM-5175
ENMET
5.2 Calibration of the AM-5175
Calibration is the process of setting the instrument up to read accurately when exposed to the target gas. The Zero function sets the
clean air reference point and the Span function sets the sensitivity of the instrument.
Initial Calibration: Wait at least 3 – 4 hours after initially supplying power to the AM-5175 instrument before initial calibration,
overnight is preferred. The AM-5175 has been pre-calibrated at the factory, and initial field calibration should result in only finetuning to circuit, as well to check that installation is successful. It is not necessary to open the enclosure to make adjustment. The
calibration functions are operated with pushbuttons from outside the enclosure through the MENU and SELECT switches.
Calibration Zero and Span functions are two separate procedures. They operate independently of each other. It is recommended
that the Zero procedure be done prior to the Span procedure.
ENMET recommends at least quarterly calibration of the AM-5175 instrument.
Calibration equipment is available from ENMET to calibrate the AM-5175 instrument.
 Calibration adapter, a length of tubing with a regulator for the gas cylinder on one end, and a calibration cup to connect to
the sensor of the AM-5175 on the other.
 Gas cylinder, zero gas 20.9% oxygen or Span gas, factory determined, varies by intent.
Generally, a cylinder of 20.9% Oxygen is used to provide a Zero point or fresh air reference for the calibration.
NOTE: Software revision may cause variations of display output.
Calibration Cup
Retaining Posts
2 places
Sensor
Menu
To Attach Calibration Cup:
Slide Down over the retaining
posts
To Remove Calibration Cup:
Slide Cup Up off the retaining
posts
Retaining Posts
2 places
Select
Front View, Attaching Calibration Cup
Side View, Attaching Calibration Cup
Calibration Cup
Menu
Select
Regulator
Front View with Cal Cup attached
Side View with calibration Adapter
Gas Cylinder
Figure 7: Calibration Adapter
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 12
AM-5175
ENMET
5.2.1 Exit Maintenance Menu
Exit maintenance, by pressing the Exit appears on the display. Press the SELECT button to return to the instrument Normal Gas
Display.
Example of Exit menu:
Menu
Press the Select button to return to the Normal Gas Display.
Select
Exit
Press the Menu button to cycle through Maintenance Menus
Not Present for Oxygen Instruments
The ZERO function must be performed by exposing the AM-5175 instrument to clean fresh air. If the air at the sensor is in
question, use a cylinder of 20.9% oxygen to provide a clean air reference.
Enter the maintenance menu by pressing and holding MENU button for 2 to 4 seconds. See Figure 6, AM-5175 Maintenance
Menu flow chart.
5.2.2 Zero Adjust
After entering the maintenance menu, Press the MENU button until the Zero menu is displayed.
Press the SELECT button to perform a Zero.
The display will alternate between Zero and PV: To abort Zero function press and hold MENU button for 3 – 4 seconds,
Abort? will appear, press SELECT button to return to Zero.
Press the SELECT button to initiate a Zero adjustment.
An auto detect sequence is initiated. After 15 seconds, the AM-5175 will monitor the zero reading for stability.
 If the reading stabilizes, within the pre-programmed perimeters, an automatic zero adjustment will be made.
Cal OK appears on the display and in 1 – 2 seconds, display will change to Span.
If you wish to Span the sensor press the SELECT button you are now ready to apply gas. Proceed to gas span step 2
If you wish to Exit the maintenance menu, press MENU button until Exit is displayed, then press SELECT button to return
to the instrument Normal Gas Display
 If the reading does not stabilize, within 255 seconds, the procedure will be aborted. Sensor is outside of safe parameters
to be zeroed, the display will read Bad Zero. Repeat Section 5.2.2 Zero Adjust making sure to use a Zero gas of 20.9%
Oxygen. ENMET part number 03296-209.
NOTE: Zero adjust is Not Present for Oxygen Instruments
Menu
Example of Zero adjustment display:
Select
Zero
Menu
PV:
0
Abort?
Select
Select
Press the Select button to force Zero adjustment
Zero
Cal OK
If the Zero signal is within Preset Specs the AM-5175 will
display Cal OK momentarily then advance to Span menu
OR
Bad ZERO
If the Zero signal is not within Preset Specs the AM-5175 will
display Bad Zero and return to Zero menu
NOTE: Software revision may cause variations of display output.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 13
AM-5175
ENMET
5.2.3 Gas Span
It is recommended that the Zero Function be performed first.
Do not perform a calibration unless span gas is applied to sensor. Calibration can be aborted by pressing and holding the
MENU button for 3 – 4 seconds.
Enter the maintenance menu. See Figure 6, AM-5175 Maintenance Menu flow chart.
1. Press the MENU button until Span display.
2. Press the SELECT button to perform a Span procedure.
The display will alternate between the calibration gas concentration (Example: Cal 20) and a signal level (PV).
 To Abort calibration press and Hold MENU button for 3 – 4 seconds, “Abort?” will appear, press SELECT button to
return to Span.
Note: To abort calibration. Press and Hold the Menu button to abort Calibration
When “Abort?” appears, press Select button to advance to desired menu
Menu

Abort?
Select
To change calibration gas level to be used, press and Hold SELECT button for 3 – 4 seconds, use menu button to
Note: To change calibration gas level. Press and Hold the Select button to change the Calibration Gas Level
-Use the Menu button to change digits
-Use the Select button to move to next digit
Select
3.
4.
5.
6.
7.
8.
20
change digit and select button to move to next digit.
Attach the associated calibration gas cylinder to the calibration adapter. See Figure 7 calibration adapter.
Open the valve to apply the calibration gas to the sensor.
An auto detect sequence is initiated after 30 seconds, the AM-5175 will monitor the cal reading for stability.
Watch for the signal level to stabilize. This should take about 1 – 4 minutes.
Once the signal level has stabilized,
 If the Span is successful, Cal OK appears momentarily, then will advance to Alarm1 menu.
To exit cal, press MENU button until Exit appears and press SELECT button
 If the sensor is outside of acceptable parameters, Bad Span is displayed.
 If the sensor did not respond, an incompatible span gas was applied and the sensor did not respond at all,
Same mV is displayed then will return to Span.
 If calibration is not successful, it is suggested that calibration be attempted again in 30-60 minutes.
If the sensor will not calibrate See Section 5.3 for sensor replacement.
Remove the calibration gas.
Press the MENU button to advance to Exit menu or desired menu.
NOTE: Software revision may cause variations of display output.
Example of Calibration Display:
Select
Span
PV:
0
Select
Menu
PV:
0
20
Cal OK
Bad Sens
Apply Cal Gas until signal value becomes stable (about 1 to 4 minutes)
See Figure 7 Calibration Adapter
When cal signal is stable AM-5175 will automatically update:
If cal is good display will indicate OK or Same and advance to
Alarm1
If cal is not within preset “range” display will indicate Bad Sens or
Same mV the AM-5175 will return to the Span Menu
To exit press Menu button until Exit appears and press Select
OR
Same mV
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 14
AM-5175
ENMET
5.2.4 Alarm Set Points
The AM-5175 has three alarm set points set at the factory. These alarm points are normally set at established safety levels.
Alarm set points can be changed within limits.
To change any of the three alarm points:
Enter the maintenance menu as shown in Figure 6 AM-5175 Maintenance Menu flow chart.
1. Press the MENU button until to display Alarm1 is displayed.
2. Press the SELECT button to initiate alarm set point change
3. Press the MENU button to change the digit indicated by the underscore cursor
Λ - Indicates increasing alarm
V - Indicates decreasing alarm
4. Press the SELECT button to move the cursor to the next digit
When last digit is entered the AM-5175 will advance to the next menu
5. Use MENU and SELECT switches as above to change time delay.
Between 0 and 5 seconds is allowed
6. Press the MENU button to advance to the next menu
NOTE: Alarms 2 and 3 cannot be set below the Alarm 1 setting.
Example of Alarm Set Point menus:
Alarm1
SELECT
MENU
Λ 5
To change Alarm set points:
Press Menu switch until Alarm to be changed is displayed
Press Select switch to display the set point
The MENU switch: changes digit indicated by underscore cursor
The SELECT switch: locks in the underscored digit and moves to
next digit
If change is not within range display returns to first digit
If change is within range display moves to Set Time Delay
Use MENU and SELECT switches as above to change time delay.
Between 0 and 5 seconds is allowed
If change is within range display moves to next menu
SetTDsec
0
Alarm2
SELECT
MENU
Λ 10
SetTDsec
0
Alarm3
SELECT
Λ 20
Λ - Indicates increasing alarm
V - Indicates decreasing alarm
SetTDsec
MENU
0
NOTE: Software revision may cause variations of display output.
5.2.5 mA Span Set
The AM-5175 4-20mA span range is set at the factory, normally to the full scale of the measurement and can be changed
within limits.
To change the span range:
Enter the maintenance menu as shown in Figure 6 AM-5175 Maintenance Menu flow chart.
1. Press the MENU button until to display Span is displayed.
2. Press the SELECT button to initiate the mA Span menu
3. Press the MENU button to change the digit indicated by the underscore cursor
4. Press the SELECT button to move the cursor to the next digit
When last digit is entered the AM-5175 will advance to the next menu
5. Press the MENU button to advance to the next menu
Example of mA Span menu:
mA Span
Menu
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
Select
50
To change mA Span set points:
Press Menu button until mA Span is displayed
Press Select button to display the set point
The Menu button changes digit indicated by underscore cursor
The Select button locks underscored digit and moves to next digit
P a g e | 15
AM-5175
ENMET
5.3 Sensor Replacement
WARNING: Power must be removed from the AM-5175 before this or any internal procedure. Failure to do so may cause
damage to equipment, bodily injury or death.
Sensors should be replaced when they can no longer be calibrated. Replacement sensor part numbers are listed in Section 6.0 of
this manual. If you do not know the proper part number for your sensor, be sure to have the AM-5175 serial number available
when contacting your distributor or ENMET technical Support.
SENSOR REPLACEMENT PROCEDURE:
1. Obtain a new sensor. Make sure the sensor type is identical to your original sensor.
2. Disconnect the instrument for power.
3. Remove the 2 Sensor PC board retaining screws.
4. Unplug the sensor from the PC Board. See Figure 8
5. Plug the new sensor into the PC Board. See Figure 8
NOTE: If a shorting clip is present, remove the clip before plugging in the new sensor.
6.
7.
8.
Replace the Sensor PC board and 2 retaining screws.
Reconnect the instrument to power.
Recalibrate the instrument (See Section 5.2).
Sensor PC Board
Sensor PC Board
Sensor Retaining Screws
2 places
Step 4. unplug sensor
Shorting Clip
If present
Step 5.Remove clip if necessary
Plug in new sensor
Figure 8: AM-5175 Sensor Replacement
After the sensor has been installed, it is suggested to allow the sensor to stabilize for at least 3 – 4 hours, preferably overnight.
5.3.1 A Factory calibration must be performed.
After entering the Maintenance menu, press and hold the MENU button for 2-4 seconds while viewing the Zero menu.
After 2-4 seconds, an F will appear on the far-right hand side of the display. The F indicates that the instrument is in Factory
mode.
Perform the calibration Zero and Span procedures as outlined in Section 5.2. Be sure that the F is present when selecting the
Zero and Span functions.
The Factory calibration sets a calibration window for future standard instrument calibrations.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 16
AM-5175
ENMET
6.0 Accessory and Replacement Parts
ENMET accessory part numbers:
Part number
03620-022
04834-004
03219-100
03296-209
04834-001
03314-020
67028-0200
67028-1100
67028-1200
73083-000
Description
Calibration Cup
Calibration Regulator Assembly for Steel Cylinder
Gas Cylinder, 100 ppm CO in air, (34 Liter, Steel Cylinders)
Gas Cylinder, Zero Gas, 20.9% oxygen in nitrogen, (34 Liter, Steel Cylinders)
Calibration Regulator Assembly for Aluminum Cylinder
Gas Cylinder, 20 ppm H2S in N2 , (34 Liter, Aluminum Cylinders)
Sensor H2S
Sensor O2
Sensor CO
Carry Case
7.0 Technical Data and Specifications
Electrical Power
Operation
Mechanical
Outputs
15 Amp fused branch circuit
100-240 VAC
0.45A, 50/60 Hz
0.6A, 24VDC
Temperature:
Relative Humidity
Dimensions:
Weight:
Material:
Strain relief:
Relays:
Analog:
Digital:
Audio:
-20 to +40C (-4 to +104F)
10-99% RH, non-condensing
7.1 x 5.1 x 3 in(180x130x75mm)
2 lbs (0.9 kg)
Polycarbonate
3 - 6.5mm OD
SPDT
Resistive Load Inductive Load
10A at 110 VAC 7.5A at 110 VAC
10A at 30 VDC 5A at 30 VDC
4-20mA
RS-485-modbus
105 dB at 30cm/12in
NOTE: All specifications stated in this manual may change without notice.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 17
AM-5175
ENMET
8.0 Terms and Conditions
8.1 Ordering Information
Address orders to:
ENMET
Attention: Customer Service Department
680 Fairfield Court
Ann Arbor, MI 48108
Email Orders: orderentry@enmet.com
Phone: 734-761-1270
Fax: 734-761-3220
You may also contact our customer service department by email info@enmet.com. MINIMUM ORDER IS $50.00.
8.2 Delivery
Unless Seller otherwise specifies, delivery will be made: FOB Ann Arbor, MI and/or FOB Bowling Green, KY. Title and risk of
loss shall pass to Buyer at that point. Shipping and handling charges will be Prepaid and Added to Buyer’s invoice. Buyer may
request shipping be charged to their own account with a preferred carrier. Seller shall have the right to choose means of
transportation and to route shipment when specific instructions are not included with Buyer’s order. Seller agrees to deliver the
goods and services, within the time, in accordance with specifications, at the prices specified on the face hereof. Buyer’s orders to
this quotation are not subject to cancellation or deferment of delivery without indemnification of loss to the Seller resulting there
from. Seller shall not be liable to Buyer for any loss or damage sustained on account of this delay or nonperformance due to
causes beyond Seller’s control and without his fault or negligence. Where performance of the terms here is contingent upon timely
delivery of goods or services by the Buyer and such delivery is in default, Seller shall be indemnified for any damage or loss
resulting there from, and/or by extension of Seller’s delivery commitment, as applicable.
8.3 Payment Terms
Payment Terms are Net 30 Days from the date of shipment from Seller unless otherwise noted. All shipping and handling costs
will be charged to Buyer on a Prepaid and Add basis. Buyer has the option of paying for shipping by charging its own account
with a carrier
8.4 Warranty Information and Guidelines
The Seller warrants new instruments to be free from defects in workmanship and material under normal use for a period of one
year from date of shipment. The warrant covers both parts and labor excluding calibration and expendable parts such as filters,
detector tubes, batteries, etc. If the inspection by the Seller confirms that the product is defective, it will be repaired or replaced at
no charge, within the stated limitations, and returned prepaid to any location in the United States. The Seller shall not be liable for
any loss or damage caused by the improper use or installation of the product. The Buyer indemnifies and saves harmless the Seller
with respect to any loss or damages that may arise through the use by the Buyer or others of this equipment. This warranty is
expressly given in lieu of all other warranties, either expressed, implied or statutory, including that of merchantability, and all
other obligations, or liabilities of ENMET, LLC for damages arising out of or in connection with the use or repair or performance
of the product. In no event shall ENMET, LLC, be liable for any indirect, incidental, special or consequential damages or for any
delay in the performance by ENMET, LLC, which may arise in connection with this equipment. ENMET neither assumes nor
authorizes any representatives or other persons to assume for it any obligation or liability other than that which is set forth herein.
Buyer agrees to indemnify and save harmless Seller for any damage or loss from lawsuits against Seller by reason of manufacture
of sale of materials, parts, or use of processes resulting from Buyer’s design specifications. Any patent, design, pattern, tool, die,
jig, fixture, drawing, test equipment, or process furnished by Seller; whether possessed by the Seller before the date of this
quotation, or devised or acquired by Seller during performance of the terms of this quotation, shall remain the property of the
Seller except by specific stipulation on the face hereof. Seller reserves the right, without liability, for damage or loss, to destroy
Buyer’s drawings, specifications, patterns and special tools supplied by Buyer for performance of the terms on the face hereof,
unless Buyer gives notice of the disposition of such items.
8.5 Return Policy
All returns for credit must be approved in advance by ENMET, LLC. Such returns are subject to a minimum $50.00 or 20%
restocking charge, whichever is greater. Approval of equipment for return is totally at the discretion of ENMET, LLC. All
requests for return/exchange must be made no later 30 days of the original shipping date from ENMET. The actual amount of any
resulting credit will not be determined prior to a complete inspection of the equipment by ENMET. Calibration gas cylinders
cannot be returned or restocked.
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 18
AM-5175
ENMET
9.0 Instructions for Returning an Instrument for Service
Contact the ENMET Service Department for all service requests.
Phone: 734-761-1270
Email: repair@enmet.com
Fill out the “Service Request Form” found at the end of this manual and return with your instrument for all needs. Please send your
instrument for service to the site in which the product was purchased. A new “Service Request Form” may be requested if the one
found in the manual is not available. All instruments should be shipped prepaid to ENMET.
Address for Service:
Michigan Location:
ENMET
Attention: Service Department
680 Fairfield Court
Ann Arbor, MI 48108
Kentucky Location:
ENMET
62 Corporate Court
Bowling Green, KY 42103
Providing the “Service Request Form” assists in the expedient service and return of your unit and 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 and the customer will be
expected to pay the evaluation fee. Serviced 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.
For Warranty Repairs, please reference ENMET’s “Warranty Information and Guidelines” (found earlier in this section).
Manual Revision Date – May 2, 2017
Manual Part No. – 80003-551
P a g e | 19
Mailing/Shipping Address:
ENMET
680 Fairfield Court
Ann Arbor, MI 48108
repair@enmet.com
Phone: 734.761.1270
Fax: 734.761.3220
Service Request Form
Product Name or Number:
Product Serial Number:
Describe Problem or Needed Service:
Warranty Claim? ☐ Yes
CUSTOMER INFORMATION
Shipping Address:
Billing Address:
Contact Name:
Email:
PO/Reference
#:
Phone #:
Fax #:
PAYMENT METHOD
☐ VISA/MasterCard
☐ COD
Card Number
Name as it Appears on
Card:
☐ UPS Ground
☐ No
☐ American Express
Exp. Date
RETURN SHIPPING METHOD
☐ UPS 3 Day
☐ UPS Next Day
☐ UPS ND Air
Select
Air
Saver
UPS Account #:
☐ FedEx Ground
☐ FedEx Air
Express Saver
FedEx Account #:
Insure Shipment: ☐ Yes
☐ No
☐ FedEx Air
Overnight Std.
☐ FedEx Air 2
Day
Security Code:
☐ UPS 2 Day Air
☐ FedEx Air
Overnight P-1
Insurance $
Amount:
ENMET
Service Request Form
Rev.2 – 9/15/2016