Armstrong Monitoring AMC-1222 User manual

1222
CO/NO2 Multidrop
INSTRUCTIONS
Installation and Operation of the
AMC-1222 Dual Electrochemical Sensor
Module with Comfort Zone
IMPORTANT:
Please read these installation and operating instructions completely
and carefully before starting.
File name:3571405A Copyright ©, Aug 2018
The Armstrong Monitoring Corporation
215 Colonnade Road South, Ottawa, Ontario, Canada K2E 7K3
Tel: [phone] • Fax: [phone] • Canada & U.S. Toll Free: [phone]
E-mail: [email protected] • Internet: www.armstrongmonitoring.com

AMC-1222 CO/NO
2
Multidrop
1
TABLE OF CONTENTS
Section Title Page
1WARRANTY..........................................................................................................................3
1.1LIABILITY.......................................................................................................................3
1.2MODIFICATIONS AND SUBSTITUTIONS.....................................................................3
1.3PRODUCT RETURN......................................................................................................3
2PRODUCT INFORMATION...................................................................................................4
2.1Sensor module ...............................................................................................................5
2.2Factory Calibration AMC1222 1/ 2 variants....................................................................5
2.3Factory Calibration AMC-1222-3....................................................................................6
3PRODUCT DESCRIPTION ...................................................................................................7
3.1GENERAL DESCRIPTION.............................................................................................7
3.1.1Internal Features.....................................................................................................7
4INSTALLATION ..................................................................................................................10
4.1LOCATION AND MOUNTING......................................................................................10
4.2CABLE SELECTION AND WIRING .............................................................................13
4.2.1Multi-Unit Interconnection......................................................................................13
4.2.2TERMINATION......................................................................................................13
5OPERATION AND CALIBRATION.....................................................................................15
5.1OPERATION ................................................................................................................15
5.1.1LOW AND HIGH ALARM CONDITIONS...............................................................15
5.1.2COMFORT ZONE.................................................................................................15
5.2CALIBRATION..............................................................................................................16
5.2.1Zero Adjustment (CO)...........................................................................................16
5.2.2Span Adjustment for (CO) 100 PPM (AMC1222-1 and -2 variants)......................16
5.2.3Span Adjustment for (CO) 75 PPM (AMC-1222-3) ...............................................17
5.2.4Zero Adjustment (NO
2
)..........................................................................................18
5.2.5Span Adjustment (NO
2
).........................................................................................18
MAINTENANCE .........................................................................................................................20
5.3GENERAL ....................................................................................................................20
5.4VERIFICATION OF OPERATION ................................................................................20
5.5SENSOR REPLACEMENT ..........................................................................................20
Figure 2-1 AMC-1222 Sensor Module..........................................................................................4
Figure 3-1 Internal Features of the AMC-1222 Sensor Module....................................................9
Figure 4-1 Transmitter Mounting Dimensions.............................................................................11
Figure 4-2 Pole Mount ................................................................................................................12
Figure 4-3 Detail wiring of Sensor Modules................................................................................14
Figure 4-4 Typical System Configuration Layout........................................................................14
Figure 5-1 Calibration Procedure for 1222 CO...........................................................................17
Figure 5-2 Calibration Procedure for 1222 NO2.........................................................................19

AMC-1222 CO/NO
2
Multidrop
2
NOTE
This page intentionally left blank

AMC-1222 CO/NO
2
Multidrop
3
1WARRANTY
The AMC-1222 Module is warranted against defects in material and workmanship for a period of
two years from date of shipment (For sensor warranties see section 2.1). During the warranty
period, The Armstrong Monitoring Corporation will repair or replace components that prove to
be defective in the opinion of AMC. We are not liable for auxiliary interfaced equipment, or
consequential damage. This warranty shall not apply to any product, which has been modified
in any way, which has been repaired by any other party other than a qualified technician or
authorized AMC representative, or when such failure is due to misuse or conditions of use.
1.1 LIABILITY
All AMC products must be installed and maintained according to instructions. Only qualified
technicians should install and maintain the equipment. AMC shall have no liability arising from
auxiliary interfaced equipment, for consequential damage, or the installation and operation of
this equipment. AMC shall have no liability for labour or freight costs, or any other costs or
charges in excess of the amount of the invoice for the products.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
AND SPECIFICALLY THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE
DESCRIPTION ON THE FACE THEREOF.
1.2 MODIFICATIONS AND SUBSTITUTIONS
Due to an ongoing development program, AMC reserves the right to substitute components and
change specifications at any time without incurring any obligations.
1.3 PRODUCT RETURN
All products returned for warranty service will be by prepaid freight and they will only be
accepted with a repair number issued by AMC. All products returned to the client will be freight
collect.
WARNING
USING ELECTRICALLY OPERATED EQUIPMENT NEAR GASOLINE, OR GASOLINE
VAPOURS MAY RESULT IN FIRE OR EXPLOSION, CAUSING PERSONAL INJURY AND
PROPERTY DAMAGE. CHECK TO ASSURE THE WORKING AREA IS FREE FROM
SUCH HAZARDS DURING INSTALLATION OR WHEN PERFORMING MAINTENANCE,
AND USE PROPER PRECAUTIONS.

AMC-1222 CO/NO
2
Multidrop
4
2PRODUCT INFORMATION
Figure 2-1 AMC-1222 Sensor Module

AMC-1222 CO/NO
2
Multidrop
5
2.1 Sensor module
Sensor Module Part Number …………………………. AMC 1222
Sensor Module Serial Number ………………………..
CO Sensor Element Part Number .…………………… AMC 91A
CO Sensor Element Serial Number ………………….
CO Sensor Element Warranty Period ………………. year(s)
NO
2
Sensor Element Part Number ….……..………… AMC 98A
NO
2
Sensor Element Serial Number … …………….
NO
2
Sensor Element Warranty Period ……………… year(s)
Power Supply Requirement …………………………... 12 to 24 VDC
Operating Temperature ……………………………….. -20° to 40° C
Operating Pressure ……………………………………. Ambient atmospheric pressure
Relative Humidity ………………………………………. 10 to 95% RH, non-condensing
2.2 Factory Calibration AMC1222 1/ 2 variants
Gas Type ……………………………………... CO NO
2
Low Alarm Setting …………………………… 25 ppm or 35ppm * 1 ppm
High Alarm Setting / Full Scale……… … … 100 ppm 3 ppm
Comfort Zone Alarm ……………………… User Selectable
Sensitivity User Selectable Sensitivity
Calibration Adapter Part Number………….. N/A N/A
* Variant AMC1222-1 is configured for 35ppm CO Low Alarm Setting, AMC1222-2 is configured
for 25ppm CO Low Alarm Setting.

AMC-1222 CO/NO
2
Multidrop
6
2.3 Factory Calibration AMC-1222-3
Gas Type ……………………………………... CO NO
2
Low Alarm Setting …………………………… 25 ppm 1 ppm
High Alarm Setting / Full Scale……… … … 75 ppm 3 ppm
Comfort Zone Alarm ……………………… User Selectable
Sensitivity User Selectable Sensitivity
Calibration Adapter Part Number………….. N/A N/A
* Variant AMC1222-3 is configured for 25ppm CO Low Alarm Setting and 75ppm CO High
Alarm Setting.
Note:
All Armstrong Monitoring systems must be installed and maintained according to
instructions, to ensure proper operation. Only qualified technicians should install and
maintain the equipment. Qualified personnel should perform the installation according
to applicable electrical codes, regulations and safety standards. Insure correct cabling
practices are implemented.

AMC-1222 CO/NO
2
Multidrop
7
3PRODUCT DESCRIPTION
In this section a general product description is given followed by a detailed list of the AMC-1222
module's internal features.
3.1 GENERAL DESCRIPTION
The AMC-1222 sensor module provides continuous, reliable surveillance of surrounding air for
traces of hazardous gases (listed in section 2.2 FACTORY CALIBRATION, page 4). This
module is designed to allow interconnection in series as in a "daisy chain" configuration (refer to
Figure 4-3 ) to a single or multi-zone AMC 1AD Series monitor or to any other monitor which
can accept voltage or current signal as specified in section 5.1 OPERATION. When using an
AMC 1AD Series monitor, a maximum of eight (8) sensor modules can be connected to each
zone. Each module produces Low alarm, High alarm and Fail signals, which are transferred
from one sensor module up the line of modules to the monitor.
3.1.1 INTERNAL FEATURES
Each sensor module features alarm indicators, adjustment trimmers and connection terminal
blocks, as listed and described below.
1. CO SENSOR: Electrochemical cell, factory calibrated.
2. NO
2
SENSOR: Electrochemical cell, factory calibrated.
3. CO LOW/HIGH ALARM
INDICATOR: Low conditions of CO gas are indicated by a red blinking LED and High conditions are indicated by a solid red LED.
4. NO
2
LOW/HIGH ALARM
INDICATOR: Low conditions of NO
2
gas are indicated by a red blinking LED
and High conditions are indicated by a solid red LED.
5. COMFORT ZONE
ALARM INDICATOR:
Comfort Zone condition is indicated by an amber LED.
6. POWER/FAIL
INDICATOR: Power is indicated by an illuminated green LED. Fail indicated by flashing LED.
7. EIGHT POSITION DIP
SWITCH: Each actuator on the DIP switch controls a different circuit as
shown in
Figure 3-1 . If the actuator is set in the RIGHT position,
its corresponding circuit is ON. If the actuator is set in the LEFT
position, the circuit is OFF.
7-1 EOL (end of line) DIP
SWITCH: The EOL is switched on for the last module in a chain and is off for all others. Refer to section 4.2.2 TERMINATION, for more
details.
7-2 Comfort Zone DIP
SWITCH This Switch is used to enable (ON) or Disable (OFF) the comfort zone alarm feature. Default setting for this switch is OFF

AMC-1222 CO/NO
2
Multidrop
8
7-3 TD DIP SWITCH: 5 minute alarm output activation time delay for CO sensor only.
7-4 MR DIP SWITCH: Keeps the output signal on the last alarm level on for 5 minutes
longer after the alarm condition has cleared
7-5 DIP SWITCH:
Dip switch positions used to set the comfort zone sensitivity.
SW5(A) SW6(B) SW7(C) SW8(D) Sensitivity
7-6 A DIP SWITCHES:
OFF OFF OFF OFF Super High
7-7 B DIP SWITCHES:
OFF ON OFF ON High
7-8 C DIP SWITCHES:
ON OFF ON OFF Med
7-8 D DIP SWITCHES:
ON ON ON ON Low
8-A CO SPAN SIGNAL
ADJUSTMENT:
Sets the sensitivity of the CO sensor.
8-B NO
2
SPAN SIGNAL
ADJUSTMENT:
Sets the sensitivity of the NO
2
sensor.
8-C NO
2
ZERO SIGNAL
ADJUSTMENT:
Sets the zero NO
2
signal.
8-D CO ZERO SIGNAL
ADJUSTMENT:
Sets the zero CO signal.
9. INPUT The input terminal block is used to connect additional sensor
modules. If input terminal block is not used, EOL is switched ON
10. OUTPUT The output terminal block connects to the monitor or the input
terminal of another module.
11. CURRENT/VOLTAGE
JUMPERS Configure between current or voltage output. Jumpers on “I” for current output and on “V” for voltage output.
12. NO2 SPAN
CALIBRATION
JUMPER
Configure NO2 calibration gas concentration. Jumper on “A” for
normal and on ”B” for double gas concentration calibration.

AMC-1222 CO/NO
2
Multidrop
9
B
A
+-
-S+
INPUT
OUTPUT
S
1
2
3
4
5
6
7
8
EOL
CZ
TD
MR
A
B
C
D
7.
OFF/ON
2.
3.
4.
5.
6.
8.
9.
10.
11.
12.
1.
Electrochemical
CO Sensor
NO2 Sensor
Electrochemical
NO2 Alarm LED
CO Alarm LED
Reset
Test Header
COM Test Point
ICSP
CO Test Point
NO2 Test Point
Jumper setting for I
Jumper setting for V
JP1
Input
Output
Comfort Zone
Alarm LED
A
A) CO Span
D) CO Zero
C) NO2 Zero
B) NO2 Span
B
Power LED
JP2
Figure 3-1 Internal Features of the AMC-1222 Sensor Module

AMC-1222 CO/NO
2
Multidrop
10
4INSTALLATION
This section relates to the proper installation of the AMC-1222 module. The topics of proper
location, sensor wiring selection, and multi-unit interconnection are all discussed in detail.
4.1 LOCATION AND MOUNTING
Mount the sensor module on a solid, non-vibrating surface or structure, easily accessible for
status checking and calibration. The module must be mounted in an area where the local
concentration of gas is unaffected by the presence of ventilation systems. Mounting height of
modules must be in compliance with local legislations and regulations.
4.1.1 MOUNTING
1. Remove cover and mounting bracket with transmitter.
2. Mount housing using defines mounting holes. See
Figure 4-1 or Figure 4-2 .
3. Drill holes for conduit and then install conduit. See Warning below.
4. Reattach cover and bracket.
Warning:
Conduit should enter the housing from the bottom to ensure best protection against
ingress of condensation.
Conduit entry from the top from the top of the housing is Not Recommended, and will
Void the Warranty. However, if conduit entry through the top is the only available
option, a Condensation Drip Shield is provided to help protect the electronics from
water ingress due to condensation from the EMT conduit. If conduit entry is through
the top of the housing, a drain hole must be drilled into the bottom side of the housing
to allow the condensation to exit the housing.
Note:
Mounting arrangement of the housing depends on the location and mounting surface.
Mounting hardware is NOT supplied.

AMC-1222 CO/NO
2
Multidrop
11
Figure 4-1 Transmitter Mounting Dimensions

AMC-1222 CO/NO
2
Multidrop
12
Figure 4-2 Pole Mount

AMC-1222 CO/NO
2
Multidrop
13
4.2 CABLE SELECTION AND WIRING
To gain access to the terminal blocks, remove the four (4) screws and front panel from the
housing. This will expose the field wiring terminals. The sensor module output (-,OUT,+)
terminal block, connects to the input (-,IN,+) terminal block of the next module towards the
monitor, or to the sensor/transmitter terminal block in the monitor, as shown in
Figure 4-3 .
Connection should be made using 3-conductor, shielded cable (shield must be grounded at the
monitor). Run cable through steel conduit for best signal transmission and maximum noise
rejection. When using an AMC 1AD Series monitor and with eight (8) modules, a maximum
length of 150 feet of 18 AWG size cable is allowed between each module as well as between
the monitor and first module. For other distances or cable sizes, consult with The Armstrong
Monitoring Corporation.
4.2.1 MULTI-UNIT INTERCONNECTION
Each sensor module is designed to interconnect to other modules in series configuration.
Typical configuration is shown in
Figure 4-4 . Since each module is pre-calibrated, additional
modules can be added to a system without altering the monitor settings. When multiple modules
are interconnected, the EOL switch is in the off position except for the last one (refer to section
4.2.2 TERMINATION and
Figure 4-3 ).
4.2.2 TERMINATION
The input terminal block for the last module in the chain will be empty and the EOL (end of line)
DIP switch is switched on.

AMC-1222 CO/NO
2
Multidrop
14
s
s
INPUT
s
s
OUTPUT
MONITOR
Up to 8 1222s can be
Daisy-chained
Max 150ft 18AWG wire
between each module
To next Module
_S+
Figure 4-3 Detail wiring of Sensor Modules
Figure 4-4 Typical System Configuration Layout

AMC-1222 CO/NO
2
Multidrop
15
5OPERATION AND CALIBRATION
This section covers instructions for the proper operation and calibration of the AMC-1222
module. The operation principles are described in further detail, followed by different types of
periodic adjustments that might be required throughout the lifetime of the equipment.
5.1 OPERATION
In general, after the stabilization period and in a clean air environment, the sensor module
should be displaying a GREEN Power ON LED. This green indicator, as well as the two red
alarm indictors and the amber logic indictor, are all visible through windows on the front panel.
Fail is indicated by a flashing power LED.
Input and Output Magnitudes in Various Conditions in Current or Voltage Mode:
Operation condition Voltage Mode Current Mode
Fail 0 VDC 0 mA
Normal 1 VDC 4 mA
Low Alarm 2 VDC 8 mA
High Alarm 3 VDC 12 mA
5.1.1 LOW AND HIGH ALARM CONDITIONS
If any gas exceeds the LOW alarm trip point setting, the red LED will start flashing and the
module will transmit a Low Alarm signal, and when using an AMC 1AD Series monitor, it also
turns ON the yellow LED at the monitor. Likewise, if any gas exceeds the HIGH alarm trip point
setting, the red LED's will turn ON and transmit a High Alarm signal to the monitor.
5.1.2 COMFORT ZONE
The comfort zone alarm condition is user selectable by using four DIP switches; three switches
for CO gas and one for NO
2
gas. When activated the amber LED turns ON and outputs to the
monitor the same as the Low Alarm condition.
SW5(A) SW6(B) SW7(C) SW8(D) Sensitivity
OFF OFF OFF OFF Super High
OFF ON OFF ON High
ON OFF ON OFF Med
ON ON ON ON Low

AMC-1222 CO/NO
2
Multidrop
16
5.2 CALIBRATION
The AMC-1222 sensor module is factory calibrated at levels based on set standards.
Calibration of the module should last for the life of the sensor, with few periodic adjustments. All
on-site adjustments are made at each sensor module. Recalibration is necessary when
replacing the sensor. Factory or on-site calibration services, customer training, and/or
calibration adapter can be provided. Specify each sensor module’s model number and gas
when requesting any of the above. Refer to sections 2.1 Sensor module and/or 2.2 FACTORY
CALIBRATION for any of the above required information.
Notes:
- The calibration procedure is the same whether the module is in current or voltage mode.
Voltage is measured at the test points when the module is in either mode.
Equipment Required:
Digital Multimeter
Miniature slot screw driver
CO and NO
2
Calibration Adapters
Zero & Span gases and regulator (Contact factory for information)
5.2.1 ZERO ADJUSTMENT (CO)
Step 1 Remove cover
Step 2 Power unit from 12-24VDC Supply, Ensure green power LED illuminates. If power LED
is flashing ensure EOL (end of line) Switch(es) are set correctly.
Step 3 Set multimeter to DC voltage range suitable for reading 2.00VDC
Step 4 Connect Multimeter to COM(-) and TP2 as shown in
Figure 5-1
Step 5 Apply Zero gas @ 1L/min
Step 6 After signal reading has stabilized (approx 1 min) adjust Zero Potentiometer to
0.00VDC
Step 7 Remove calibration gas
5.2.2 SPAN ADJUSTMENT FOR (CO) 100 PPM (AMC1222-1 AND -2 VARIANTS)
Step 8 Apply CO span gas, CO span gas concentration should be in 25ppm to 100ppm CO
range
Step 9 After the signal reading has stabilized (approx 3 min) adjust Span potentiometer to
2.00VDC/100*Span gas concentration. i.e. if using 50 ppm CO
2.00VDC/100*50=1.00VDC
Step 10 If Signal > .7VDC verify CO Alarm LED Flashes, If Signal > 2.00VDC verify CO Alarm
LED Illuminates steady State
Step 11 Remove Gas, Calibration complete

AMC-1222 CO/NO
2
Multidrop
17
5.2.3 SPAN ADJUSTMENT FOR (CO) 75 PPM (AMC-1222-3)
Step 8 Apply CO span gas, CO span gas concentration should be in 25ppm to 75ppm CO
range
Step 9 After the signal reading has stabilized (approx 3 min) adjust Span potentiometer to
2.00VDC/75*Span gas concentration. i.e. if using 25 ppm CO
2.00VDC/75*25=0.6667VDC
Step 10 If Signal > .7VDC verify CO Alarm LED Flashes, If Signal > 2.00VDC verify CO Alarm
LED Illuminates steady State
Step 11 Remove Gas, Calibration complete
Figure 5-1 Calibration Procedure for 1222 CO

AMC-1222 CO/NO
2
Multidrop
18
5.2.4 ZERO ADJUSTMENT (NO
2
)
Step 1 Remove cover
Step 2 Power unit from 12-24VDC Supply, Ensure green power LED illuminates. If power LED
is flashing ensure EOL (end of line) Switch(es) are set correctly.
Step 3 Set multimeter to DC voltage range suitable for reading 2.00VDC
Step 4 Connect Multimeter to COM(-) and TP1 as shown in
Figure 5-2
Step 5 Apply Zero gas @ 1L/min
Step 6 After signal reading has stabilized (approx 1 min) adjust Zero Potentiometer to
0.00VDC
Step 7 Remove calibration gas
5.2.5 SPAN ADJUSTMENT (NO
2
)
There are two possible calibration modes; A and B. They are selectable using NO2 span
calibration jumper, JP2, see section 3.1.1 item 12. Mode A is normal mode. Mode B allows the
AMC 1222 to measure only half of the calibration gas. This is useful as 2.5 or 3ppm calibration
gas is not common to purchase but 5 or 6ppm is.
Step 8 Using Teflon hose apply NO2 span gas, NO2 Span gas concentration should be in 1ppm
to 3ppm NO2 range
Step 9 After the signal reading has stabilized (approx 3 min) adjust Span potentiometer to
2.00VDC/3*Span gas concentration. i.e. if using 1.5 ppm NO2
2.00VDC/3*1.5=1.00VDC
Note: If mode B calibration is use, divide span gas concentration by 2 before using the
above calculation. i.e. if using 5ppm NO2
2.00VDC/3*5/2=1.67VDC
Step 10 If Signal > .66VDC verify NO2 Alarm LED Flashes, If Signal > 2.00VDC verify NO2
Alarm LED Illuminates steady State
Step 11 Remove Gas and unit must be in mode A for normal operation, Calibration complete

AMC-1222 CO/NO
2
Multidrop
19
Figure 5-2 Calibration Procedure for 1222 NO2