ACM 3907 User manual

3907/3917
IR HC Det ect or
T r ans mi tter
I NS T AL L AT I ON AND
OP E R AT I NG I N S T R U CT I ON S
AMC-3907/3917 IR HC S E N S OR -
T R ANS MI T T E R MODULE
I MP OR T ANT :
Please read these installation and operating instructions completely
and carefully before installation and use.
filename:
Manual_amc-3907-3917 IR HC sensor-transmitter .doc
Revised, 09/05/2003
Copyright ©, Sept 2003, AMC
The Armstrong Monitoring Corporation
215 Colonnade Road South, Nepean, Ontario, Canada K2E 7K3
Tel: [phone] • Fax: [phone] • Canada & U.S. Toll Free: 1-800-465-5777
E-mail: [e-mail] • Internet: www.armstrongmonitoring.com/gas/

AMC-3907/3917 IR HC Sensor-Transmitter Module
i
TABLE OF CONTENTS
Section Title
Page
1WARANTY.......................................................................................................................... ii
1.1 LIABILITY......................................................................................................................ii
1.2 MODIFICATIONS AND SUBSTITUTIONS....................................................................ii
1.3 PRODUCT RETURN.....................................................................................................ii
2PRODUCT INFORMATION ............................................................................................... iii
3PRODUCT DESCRIPTION ................................................................................................. 1
4INSTALLATION.................................................................................................................. 4
4.1 LOCATION AND MOUNTING...................................................................................... 4
5OPERATION AND CALIBRATION..................................................................................... 4
5.1 OPERATION................................................................................................................ 4
5.2 CALIBRATION ............................................................................................................. 5
5.2.1 MENU 1 –SENSOR ZERO ...................................................................................... 6
5.2.2 MENU 2 –SENSOR SPAN ...................................................................................... 6
6ROUTINE MAINTENANCE & SERVICING......................................................................... 7
6.1 VERIFICATION OF MODULE PERFORMANCE.......................................................... 7

AMC-3907/3917 IR HC Sensor-Transmitter Module
ii
1WAR R AN T Y
The AMC-IR 3907/3917 HC sensor-transmitter module is warranted against defects in material
and workmanship for a one year period from date of delivery. During the warranty period, we
will repair or replace components that prove to be defective in the opinion of The Armstrong
Monitoring Corporation. We are not liable for auxiliary interfaced equipment, nor 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, AND USE PROPER PRECAUTIONS.

AMC-3907/3917 IR HC Sensor-Transmitter Module
iii
2P R ODU CT INFORMATION
Transmitter Part Number …………………………………
Transmitter Serial Number ………………………………
Power Supply Requirements ……………………………
8-30VDC, 24VDC nom., 5Wmax.
Note: At higher voltages a heat sink on
the PCB will result an increase in
temperature.
Operating Temperature Range …………………………
Relative Humidity ………………………………………...
0-99% RH, non condensing
Fuses ………………………………………………………
500mA anti-surge in line fuse for circuit
protection.
Range………………………………………………………
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.

AMC-3907/3917 IR HC Sensor-Transmitter Module
1
3P R ODU CT DESCRIPTION
The AMC-3907/3917 IR HC sensor transmitter is a one-channel gas monitoring system
designed to connect to a monitor for continuous monitoring of surrounding air for traces of
gaseous hydrocarbons. The sensor-transmitter comes with the following features (see Figures
1, 2 and 3).
1. DIGITAL LCD:
For mode and calibration indication.
2. 4 BUTTON ON-BOARD KEY
PAD:
For calibration.
3. 4-20 mA OUTPUT:
PCB mounted screw terminal for 10-bit resolution current
source to provide output signal.
4. INPUT VOLTAGE TERMINAL:
PCB mounted screw terminal for 8-30VDC input supply
voltage
5. RS232 COMMUNICATIONS
PORT:
3-way Molex header for PC communications with the
transmitter.
6. PROGRAMMING
CONNECTOR:
5-way Molex header for programming the transmitters on
board processor.
7. SENSOR INPUT:
5-way Molex header for infrared sensor input signals.
8. IR LAMP DRIVE SUPPLY:
2-way Molex header for infrared sensor lamp drive.
9. EXPLOSION PROOF
HOUSING:
Affords protection to the PCB and sensor.
Class I, group B, C & D.

AMC-3907/3917 IR HC Sensor-Transmitter Module
2
–
+
–
+
4- Power Input
(8
30V)
3- Analogue Output
(4
–
20mA)
1- LCD display
2- On board
key pad
-
Figure 1: Front view of transmitter PCB.
PL5 1
PL4 1
1 PL1
1 PL6
6- Five-Way Molex Header
Programming connector for
Analogue Output
Infrared sensor signals.
7- Five-Way Molex Header
8- Two-Way Molex Header
Infrared sensor lamp drive.
5- Three-Way Molex Header
RS232 Communications Port.
Figure 2: Rear view of transmitter PCB.

AMC-3907/3917 IR HC Sensor-Transmitter Module
3
Figure 3: IR HC explosion proof sensor-transmitter.

AMC-3907/3917 IR HC Sensor-Transmitter Module
4
4I NS T AL L AT I ON
4.1 LOCATION AND MOUNTING
The AMC-3907/3917 IR HC sensor-transmitter should be mounted in a place sufficient enough
for the sensor to receive its environment, and secure from potential mechanical damage. It
should remain clean and free from debris. Keep the internal area of the enclosure clean and dry.
Mount the unit in a location that it will not experience submersion in liquids, exposure to extreme
temperatures, and electrical noise signals.
Note:
The Infrared sensor output is a low level signal to which a high gain is applied by the
circuitry. For this reason it is important to avoid the pickup of unwanted electrical
signals, either low frequency or RFI.
Cables that run to the monitor should be shielded as well.
5OP E R AT I ON AND CAL I B R AT I ON
5.1 OPERATION
Note:
Make sure all connections are proper and secure before applying power to the unit.
When power is first applied to the module an initialization procedure is performed as follows:
All the segments on the LCD are shown
The software version number is displayed
The sensor type is displayed
The display then flashes with 3 vertical dots.
The module is now operational.
8.8 8.8
1.61
HC

AMC-3907/3917 IR HC Sensor-Transmitter Module
5
5.2 CALIBRATION
LCD display
On board
key pad
Figure 4: LCD and on board key pad.
Note:
As the calibration procedure may cause the monitoring equipment to give a false
alarm, appropriate precautions should be taken.
The menu system featured within the module allows all calibration and configuration activities to
be performed. The menu system may be accessed by using the on board key pad while viewing
the LCD display (see figure 4).
Figure 5: Key pad numbering.
The keypad has the following functionality:
Button
Function
1
Menu Open/Close
2
Enter
3
Next (Increment)
4
Previous (Decrement)
1 2 3 4

AMC-3907/3917 IR HC Sensor-Transmitter Module
6
Note:
Ensure that the correct sensor type is selected in the configuration prior to sensor
calibration.
5.2.1 MENU 1 –SENSOR ZERO
*(Refer to figure 5, page 5 for key pad numbering).
•Press button 1 to open the menu system.
•Using the NEXT and PREVIOUS buttons (buttons 3 & 4), select menu option: E: 1
•Press ENTER (button 2).
•Ensure the sensor is in a hydrocarbon-free environment.
•Press ENTER (button 2) to zero the sensor, ‘––––‘ will be displayed to confirm the
sensor zero has been performed.
Note: Pressing button 1 rather than button 2 exits the zero feature without
performing the calibration.
•Press button 1 to close the menu system.
Note: The ZERO factor will be displayed on exit.
5.2.2 MENU 2 –SENSOR SPAN
*(Refer to figure 5, page 5 for key pad numbering).
•Press button 1 to open the menu system.
•Using the NEXT and PREVIOUS buttons (buttons 3 & 4), select menu option: E: 2
•Press ENTER (button 2).
•Apply a known concentration of gas (applicable to sensor type) at a flow rate of
between 500 and 1000cc/min. Allow time for the sensor to respond.
•Using the INC and DEC buttons (buttons 3 & 4) set the reading to that of the
calibration gas level.
•Press ENTER (button 2) to span the sensor, ‘––––‘ will be displayed to confirm the
sensor span has been performed.
Note: Pressing button 1 rather than button 2 exits the span feature without
performing the calibration.
Wait until the reading is stable, if not press button 2 to span the sensor.
•Press button 1 to close the menu system.
Note: The SPAN factor will be displayed on exit.
•Turn off and disconnect the calibration gas.

AMC-3907/3917 IR HC Sensor-Transmitter Module
7
6R OU T I NE MAINTENANCE & SERVICING
The AMC-3907/3917 IR HC sensor transmitter module should be periodically inspected:
•Clean detector heads using a clean damp cloth. Avoid spraying, submersion and
other conditions that could cause a liquid to enter the module and cause possible
intrinsic damage to internal components
•Inspect the sensor and housing to ensure it is sound and the aperture is not
obstructed.
The maximum time interval for maintenance and inspection depends upon the environment in
which the equipment is installed. The module should follow a regular maintenance program.
6.1 VERIFICATION OF MODULE PERFORMANCE
A test should be performed to ensure that no transmitter failures are present and that the output
is functioning properly. This test should be performed every 2 months, but for more demanding
applications, verification should be performed on a weekly basis.