Page 1
ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
Model IR-6000
Hydrocarbon
Sensor/Transmitter
Manual
Manual Part Number
80003-090
MCN-427, 11/03/10
Page 2
Table of Contents
1.0 I
NTRODUCTION
1.1 Unpack............................................................................................................................................................................ 1
1.2 Check Order ................................................................................................................................................................... 1
1.3 Serial Numbers ............................................................................................................................................................... 1
2.0 I
NFRARED DETECTION TECHNOLOGY
3.0 I
NSTALLATION
4.0 O
PERATION
4.1 Normal Operation ........................................................................................................................................................... 5
5.0 M
AINTENANCE
Clean Environment, Operation Utilizing MX-Series Controllers or Similar System Devices ............................................. 5
Dirty or Dusty Environment ................................................................................................................................................. 5
6.0 Z
ERO CALIBRATION
6.1 Clean Environment ......................................................................................................................................................... 6
6.2 Dirty or Dusty Environment ........................................................................................................................................... 6
6.3 Normal Calibration ......................................................................................................................................................... 6
7.0 S
PECIFICATIONS
8.0 WARRANTY ........................................................................................................................................................ 7
....................................................................................................................................................... 1
....................................................................................................................... 2
........................................................................................................................................................ 4
............................................................................................................................................................ 5
........................................................................................................................................................ 5
................................................................................................................................................ 6
..................................................................................................................................................... 6
List of Illustrations
C
HART 1: INFRARED ABSORPTION SPECTRUM FOR METHANE
D
IAGRAM 1: CUTAWAY VIEW OF THE
F
IGURE 1: WIRING DIAGRAM
T
ABLE 1: WIRING CONNECTIONS
T
ABLE 2: CURRENT OUTPUT AND CORRESPONDING GAS CONCENTRATION
N
OTE
: [important information about use of instrument]
C
AUTION
: [affects equipment – if not followed may cause damage to instrument, sensor etc…]
W
ARNING
:
[affects personnel safety – if not followed may cause bodily injury or death.]
IR-6000 S
IR-6000 ................................................................................................................ 2
ENSOR/TRANSMITTER
................................................................................................................................... 4
........................................................................................ 2
....................................................................................... 3
.................................................................... 5
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
1.0 Introduction
The IR-6000 Infrared hydrocarbon Sensor/Transmitter (S/T) is a microprocessor based intelligent gas detector that
continuously monitors combustible hydrocarbon gases and vapors in the % Lower Explosive Limit (LEL) or % by Volume
ranges, depending on instrument configuration.
The IR-6000 is ideally suited for use in harsh environments and where the cost of required maintenance for conventional
catalytic detectors is prohibitive. The IR-6000 Infrared gas detector will perform reliably in the presence of silicone and other
catalytic poisoning agents and can also operate in oxygen free environments or where high background gas levels are present.
The IR-6000 can operate from a 24 VDC power source and produce a continuos 4–20 mA output or it can be connected to
various MX Series controllers available from ENMET.
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Unpack
Unpack the IR-6000 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
N
OTE
: It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor
any claims for damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in
good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and
request immediate inspection of the carton and the contents.
• After the inspection and after you have received written acknowledgment of the damage from the carrier, contact
ENMET Customer Service for return authorization and further instructions. Have your Purchase Order and Sales
Order numbers available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage,
usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping
company when asked to do so in writing by our customer. If you need your shipments insured, please 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 Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
1.2 Check Order
Check, the contents of the shipment against the purchase order. Verify that the IR-6000 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 IR-6000 is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
Reference
Waveguide
Wiring
2.0 Infrared Detection Technology
The IR-6000 Infrared gas detector uses infrared absorption technology for detecting combustible hydrocarbon gases. Gases
absorb infrared light only at certain wavelengths. The concentration of a gas can be measured by the difference of two channels
(wavelengths), a reference and a measurement channel. The IR-6000 uses a collimated infrared light source that passes through
a waveguide, at the end of the waveguide is a dual channel receiver. The dual channel receiver measures the intensity of two
specific wavelengths, one at an absorption wavelength and another outside of the absorption wavelength. The gas
concentration is determined by a comparison of these two values.
Chart 1: Infrared Absorption Spectrum for Methane
100%
Transmittance
0%
Absorption
Band
Wavelength
Band
The dual channel receiver is a single wafer, double filtered, dual receiver with an internal optical barrier. The elements are
perfectly matched resulting in overall stability and superior performance throughout the entire temperature range.
Diagram 1: Cutaway view of the IR-6000
Dual Channel
Receiver
Connections
Window
Collar
Waveguide
Hydrophobic Filter
Using a dual channel receiver there is no need to use any special lenses or beam splitters to achieve the different measurement
bands.
The IR-6000 utilizes a unique patent pending feature, the AutoAC circuit. The AutoAC circuit is an automatic analog
control circuit, which allows the IR-6000 to be calibrated for any combustible hydrocarbon, provided that a calibration quality
level of the gas is available. This eliminates setting dipswitches or changing out sensors for different types of hydrocarbons,
simply zero calibrate the unit with a calibration gas of the specific gas to be detected.
The optics can be easily disassembled for cleaning. This does not require powering the unit down and does not compromise the
units’ explosion proof rating.
There are no consumable components contained in this product.
Infrared Light
Source
Window
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
BLACK:
-
24VDC (DC Common)
BLUE:
mA Output
66mm
Earth
Zero Calibration
WHITE: Zero Calibration
RED: +24 VDC
3/4“ NPT
THREAD
4–20
Field
Wiring
Ground
Stud 10-32
Performed by applying clean air and touching
the white wire to the black wire for 10 seconds
6.5 inches
165mm
2.6 inches
Figure 1: Wiring Diagram IR-6000 Sensor/Transmitter
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
3.0 Installation
W
ARNING
:
The user shall be made aware that if the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
N
OTE
: The IR-6000 transmitters are zeroed and have their response to the target gas verified prior to shipment. It is
recommended that following installation that a zero and sensor response test be preformed to insure that no damage to the
transmitter occurred during shipment and that proper installation has been preformed.
The first step in the installation process is to establish a mounting location for the IR-6000. Select a location that is typical of
the atmosphere to be monitored or close to the anticipated source of a dangerous gas.
It is very important that the IR-6000 be properly located to enable it to provide maximum protection. The most effective
number and placement of sensors vary depending on the conditions of the application. When determining where to locate
sensors the following factors should be considered
What are the characteristics of the gas that is to be detected? Is it lighter or heavier than air? If it is lighter than air the
sensor should be placed above the potential gas leak. Place the sensor close to the floor for gases that are heavier than air or
for vapors resulting from flammable liquid spills. Note that air currents can cause a gas that is heavier than air to rise. In
addition, if the temperature of the gas is hotter than ambient air or mixed with gases that are lighter than air, it could also
rise.
How rapidly will the gas diffuse into the ambient air? Select a location for the sensor that is close to the anticipated source
of a gas leak.
Wind or ventilation characteristics of the immediate area must also be considered. Movement of air may cause gas to
accumulate more heavily in one area than in another. The detector should be placed in the areas where the most
concentrated accumulation of gas is anticipated. For outdoor applications with strong wind conditions, it may require the
sensors to be mounted closer together and on the down wind side, to the anticipated area of a gas leak. Also, take into
consideration for indoor applications, the fact that many ventilation systems do not operate continuously.
The sensor should be accessible for maintenance.
Excessive heat or vibration can cause premature failure of any electronic device and should be avoided if possible.
Follow all national and local installation codes and practices.
The IR-6000 has a ¾″ NPT threaded connector for mounting the detector to a junction box.
A user-supplied junction box can be used providing it has the appropriate sized NPT conduit entries. The junction box must be
suitable for use in the application and location in which it is being installed. After the device has been installed, a zero
calibration is required. Refer to the Zero Calibration section of this manual.
Table 1: Wiring connections
Wire Description
Red wire: 18 to 32 V
Black wire: DC Common
Blue wire: 4–20 mA output
White wire: Zero Calibration Data Wire
Earth Ground: Male 10-32 Stud on IR-6000 cap, See Figure 1
W
IRE SIZING
Shielded cable is recommended. Wiring should be installed in medal conduit with no other cabling in the same conduit.
0 to 500 feet, recommended wire gauge size 16 AWG
501 to 1000 feet, recommended wire gauge size 14 AWG
:
DC
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
4.0 Operation
4.1 Normal Operation
Clean Environment Using MX-Series Controller:
After power is applied, the IR-6000 enters an initial one (1) minute warm-up period before the normal operation begins.
A 4–20 mA signal corresponds to the detected gas concentration. See Table 2.
The 4–20 mA output of the IR-6000 is a non-isolated current source.
Table 2: Current Output and Corresponding Gas Concentration
Current Output Status
0.0 mA Unit Fault (-25%)
0.2 mA Reference Channel Fault (-23.75%)
0.4 mA Analytical Channel Fault (-22.50%)
0.8 mA Unit warm-up (-20%)
1.0 mA Optics Fault (-18.75%)
1.2 mA Zero Drift Fault (-17.50%)
1.6 mA Calibration Fault (-15%)
2.0 mA Unit Spanning (-12.50%)
2.2 mA Unit Zeroing (-11.25%)
4.0 mA Zero gas level (0%LEL) or 0% by Vol.
5.6 mA (10%LEL) or 10% by Vol.
8.0 mA (25%LEL) or 25% by Vol.
12 mA (50%LEL) or 50% by Vol.
16 mA (75%LEL) or 75% by Vol.
20 mA Full scale (100% LEL) or 100% by Vol.
20.1- 23 mA Over-range
5.0 Maintenance
N
Clean Environment, Operation Utilizing MX-Series Controllers or Similar System Devices
The IR-6000 does not normally require cleaning of the optics.
N
Dirty or Dusty Environment
If the unit is operating in a very dirty or dusty environment, the optical path might become obscured. If the obscuration is severe
enough to affect the unit’s accuracy, the unit will activate an “Optics Fault”. This fault would typically be indicated by a fault
relay activation on a control panel and possibly a negative reading on a display, – X X X . To clear an Optics Fault, first try a
zero calibration. If the zero calibration does not correct the fault condition, try to clean the optics.
C
AUTION
: Cleaning the optics should be preformed by qualified personal
The outer barrel (tube with two sets of holes) can be removed (unscrewed) to inspect the cleanliness of the hydrophobic filter.
The hydrophobic filter is a Teflon coated stainless steel mesh that keeps moisture and particulates out of the optical path. A set
screw holds the filter to the IR-6000 housing. Once the hydrophobic filter is removed, the internal waveguide tube should be
inspected for cleanliness. The waveguide and waveguide collar can be removed by inserting rigid instruments such as Allen
wrenches into one hole of the waveguide and one hole of the collar. Turning the two instruments in opposite directions will
loosen the waveguide allowing the collar to be screwed down on to the waveguide until it can be removed from the IR-6000
housing. This will allow the windows of the IR-6000 to be cleaned. Dust can be removed using compressed air. Hard or oily
deposits can be removed using Isopropyl alcohol and cotton tipped swabs. Wipe any film or residue or film left by the alcohol
on the windows with a clean dry cotton swab. The internal electro polished wave-guide tube can be cleaned the same way. Be
careful not to leave any particles of the cleaning swab in the waveguide. The waveguide holes can collect pieces of the
cleaning swab. After reassembling the unit (the waveguide and collar should be very tight to both ends of the IR-6000 housing
after installation). Once the unit is completely reassembled and power is reapplied, the IR-6000 must be calibrated. Refer to
the zero calibration section of this manual.
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
6.0 Zero Calibration
N
OTE
: Unlike most gas detector transmitters an IR transmitter only requires that a zero calibration be preformed. Application
of a target gas is a performance “check” only.
6.1 Clean Environment
The IR-6000 is factory zeroed and spanned. Unlike catalytic sensors, the IR-6000 typically does not require routine field span
gas calibration to ensure proper operation.
In a relatively clean environment, zero and performance check should done once every 6 months. To check the performance,
expose the IR-6000 to a known level of the target gas and verify that the reading is adequately close to the known level.
6.2 Dirty or Dusty Environment
When the application is a dirty dusty environment, the IR-6000 should be checked more frequently.
The IR-6000 can be calibrated for almost any hydrocarbon using a calibration gas of the hydrocarbon that is to be detected
(target gas). The IR-6000 is required to be spanned with gas only one time with the target gas. Typically, this is done at the
factory, but it is possible to field span the device by connecting the IR-6000 to a computer and using the software package
option. Contact ENMET for availability.
6.3 Normal Calibration
It is recommended that a cylinder of “clean air” be used to reform the zero calibration. Cylinder 20.9 air is ENMET part
number 03296-209. If the sensor is located in an area that is known to be free of the hydrocarbon gases then ambient air can be
used as a zero reference.
If a cylinder is used for the zero calibration, there is a calibration port on the bottom of the sensor for a 1/8” ID tubing
connection.
If the Monitor is reading slightly up scale and it is known that no combustible gas is in the area, the IR-6000 can be zeroed by
touching the white wire to the black wire for 10 seconds.
7.0 Specifications
Detection Method
Output (analog)
Response Time
Construction
Ingress rating
Accuracy
Operating Temperature Rating
Operating Voltage
Power Consumption
Max. Current Draw(at 24 VDC)
Approvals
N
OTE
: All specifications stated in this manual may change without notice.
Diffusion
4–20 mA (Source type), max. 1000 Ohm load at 24 V
T50 < 5 seconds
T90 < 10 seconds
Sensor housing is nickel-plated aluminum and stainless steel.
Optional stainless steel model available.
IP54
+/- 3% LEL, 0 to 50% LEL (Lower Explosive Limit)
+/- 5% LEL, 51 to 100% LEL
-40° to +70°C at 0 to 99% RH (non-condensing)
24 VDC, Operating range: 18 to 32 V
5 Watts Max.
Average: 210 mA, Peak: 400 mA
CSA, Class 1, Division 1, Groups B, C and D
DC
supply voltage
DC
measured at the detector head
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IR-6000 Hydrocarbon Sensor/Transmitter ENMET Corporation
8.0 WARRANTY
ENMET 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 from ENMET. The warranty covers both parts and labor excluding instrument calibration and
expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to
ENMET within the warranty period (transportation prepaid) for inspection. If the evaluation by ENMET 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 by the most economical means, e.g. Surface UPS/FedEx Ground. If an expedient means of
transportation is requested during the warranty period, the customer is responsible for the difference between the most
economical means and the expedient mode. ENMET shall not be liable for any loss or damage caused by the improper use of
the product. The purchaser indemnifies and saves harmless the company with respect to any loss or damages that may arise
through the use by the purchaser or others of this equipment.
This warranty is expressly given in lieu of all other warranties, either expressed or implied, including that of merchantability,
and all other obligations or liabilities of ENMET which may arise in connection with this equipment. ENMET neither assumes
nor authorizes any representative or other person to assume for it any obligation or liability other than that which is set forth
herein.
N
OTE
: When returning an instrument to the factory for service:
Be sure to include paperwork.
A purchase order, return address and telephone number will assist in the expedient repair and return of your unit.
Include any specific instructions.
For warranty service, include date of purchase
If you require an estimate, please contact ENMET Corporation.
There is Return for Repair Instructions and Form on the last pages of this manual. This form can be copied or used as needed.
Manual Part Number
80003-090
MCN-331, 04/22/05
MCN-341, 08/02/06
MCN-427, 11/03/10
Notes:
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PO Box 979
680 Fairfield Court
Ann Arbor, Michigan 48106-0979
734.761.1270 Fax 734.761.3220
Returning an Instrument for Repair
ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair
service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty
service work.
When returning an instrument to the factory or service center for service, paperwork must be included which
contains the following information:
A purchase order number or reference number.
A contact name with return address, telephone and fax numbers
Specific instructions regarding desired service or description
of the problems being encountered.
Date of original purchase and copy of packing slip or invoice
for warranty consideration.
If a price estimate is required, please note it accordingly and be
sure to include a fax number.
Providing the above information assists in the expedient repair and return of your unit.
Failure to provide this information can result in processing delays.
ENMET charges a one hour minimum billing for all approved repairs with additional time billed to the closest
tenth of an hour. All instruments sent to ENMET are subject to a minimum evaluation fee, even if returned
unrepaired. Unclaimed instruments that ENMET has received without appropriate paperwork or attempts to
advise repair costs that have been unanswered, after a period of 60 days, may be disposed of or returned
unrepaired COD with the evaluation fee.
Service centers may have different rates or terms. Be sure to contact them for this information.
Repaired instruments are returned by UPS/FedEx Ground and are not insured unless otherwise
specified. If expedited shipping methods or insurance is required, it must be stated in your paperwork.
Note: Warranty of customer installed components.
If a component is purchased and installed in the field, and fails within the warranty term, it can be
returned to ENMET and will be replaced, free of charge, per ENMET’s returned goods procedure.
If the entire instrument is returned to ENMET Corporation with the defective item installed, the item will
be replaced at no cost, but the instrument will be subject to labor charges at half of the standard rate.
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Mailing Address:
Shipping Address:
Repair Return Form
ENMET Corporation
PO Box 979
Ann Arbor, Michigan 48106
Phone Number: 734.761.1270
FAX Number: 734.761.3220
Your Mailing Address:
Contact Name: __________________________ Your Phone: _______________________
Your PO/Reference Number: _______________ Your FAX: _______________________
ENMET Corporation
Attn: Repair Department
680 Fairfield Court
Ann Arbor, Michigan 48108
Your Shipping Address:
Payment Terms: K COD
(Check one) K VISA / MasterCard______________________ ________ ________
Card number Expiration Card Code
K American Express______________________ ________ ________
Card number Expiration Card Code
Name as it appears on the credit card___________________________________
Return Shipping Method:
K UPS: K Ground K 3 Day Select K Next Day Air K ND Air Saver K 2-Day Air
K UPS Account number: ________________________
K Federal Express: K Ground K Express Saver K P-1 K Standard K 2-Day Air
K FedEx Account number: ________________________
Would you like ENMET to insure the return shipment?
K No K Yes Insurance Amount: $_________________
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