INSTRUCTION AND
INSTALLATION MANUAL
EC-F2 SENSOR FOR
CARBON MONOXIDE
Model EC-F2-CO
Honeywell Analytics
405 Barclay Blvd
Lincolnshire, IL 60069
847 955 8200
800 538 0363
847 955 8208 (FAX)
detectgas@honeywell.com
www.honeywell.com
CONTENTS
Section Title Page
1 Sensor Description 2
2 Installation 3
3 Operation 5
4 Warranty 7
SENSOR DESCRIPTION 1
A Introduction
This manual has been prepared to
help in the use and installation of the
Manning Systems’ Model EC-F2-CO
(Electrochemical-Carbon Monoxide) Sensor. This manual will convey the operating principles of the sensor, ensure proper
installation, and demonstrate start-up and
routine maintenance procedures for the
sensor.
This manual must be carefully followed by all individuals who have or
will have the responsibility for using or
servicing the sensor. Warranties made
by Manning Systems, Inc. with respect to
this equipment will be voided if the equipment is not used and serviced in accordance with the instructions in this manual.
If in doubt about a procedure, please
contact Manning Systems, Inc. before
proceeding.
B System Description
The Manning Systems’ EC-F2 Sensor is a three-wire, 4/20 mA sensor for
carbon monoxide available in ranges of
0-200 ppm, and 0-400 ppm.
The unit exhibits excellent accuracy
and precision, with negligible response to
common interference gases and dramatic
changes in relative humidity. Reliable
trip levels as low as 35 ppm can be expected with the 0-200 ppm sensor. The
unit exhibits extremely high reliability
with no moving parts.
Monitoring equipment must be configured to indicate a fault if the signal is
less than 1.5 mA. All signals over 20 mA
must be considered a high gas concentration.
System Specifications:
Electrical Power: 24 Volts DC regu-
lated, 30 mA. With a heated enclosure,
the current draw is 300 mA max.
Output: Linear 4-20 mA output into
a load resistor of 250 ohm maximum.
Cable Recommendation: Threeconductor, 18 AWG, stranded, shielded
cable with drain wire all enclosed in a
vinyl jacket (Belden #8770 or equivalent).
Cable Length to Sensor: 1,500 feet
maximum.
Unit Enclosure: NEMA 1, gasketed,
16-gauge steel. Special enclosures available for NEMA 4, explosion-proof, low
temperatures, ventilation ducts, washdown
areas, etc.
Note: The standard EC-F2 is for
use in non-classified areas only.
Serial Number
Sensor Specifications:
Type: Carbon monoxide-selective
electrochemical gas sensor/transmitter
Model EC-F2-CO
Method of Detection: Electrochemi-
cal.
Ranges Available:
0-200 ppm
0-400 ppm
Accuracy: +/- 3% of full scale.
Humidity: 5-95% RH (non-con-
densing). Modifications are available for
more severe conditions.
Operating Ambient Temperature
range: -15o F to 120o F. Modifications
are necessary for refrigerated areas.
Storage Temperature: -40o F to
+70oF. Keep sensor as cool as possible
during long-term storage to extend the life
of the cell.
Gas Sampling: Diffusion.
Weight: 3 pounds.
Dimensions: 6” high x 4” wide x
3.5” deep.
2 MANNING EC-F2-CO SENSOR 305-0112-d
INSTALLATION 2
A Locating the EC-F2
Sensor
Each sensor is a point measurement,
and it is very important that the sensor
be located properly.
Because each sensor can only “re-
port” what it is smelling at the moment, it
is very important that the sensor be
located where leaks are most likely to
occur.
Locate the sensor close to the expected source of carbon monoxide. Carbon monoxide vapor is about the same
weight as ambient air, so for area personnel protection consider mounting the sensor in the normal breathing zone (four to
five feet above the floor).
One of the most important considerations when installing EC sensors is that
they
must be easily accessible for calibra-
tion and maintenance.
General: The location should be
chosen to protect the sensor from water,
excessive humidity, and vibration. MOST
REPLACEMENT IS DUE TO WATER
SENSOR
DAMAGE
by clean-up and maintenance crews.
closer than 3 feet from walls or 1 foot
from the ceiling. Take air movement and
ventilation patterns into account when
locating sensors.
mounted, it must be easily accessible.
bration and maintenance.
tential leak source.
mary application, mount in the “breathing
zone.”
sive humidity, and wash-down.
patterns into account.
keep sensor and wire runs away from
! Protect sensors from hose-down
As a general rule, locate sensors no
No matter where the sensor is
General Mounting Considerations:
• Must be easily accessible for cali-
• Always mount the sensor vertically.
• Mount the sensor close to the po-
• If personnel protection is the pri-
• Protect sensor from water, exces-
• Take air movement and ventilation
• To prevent electrical interference,
mercury vapor lights, variable speed
drives, and radio repeaters.
• Protect sensor from physical dam-
age (fork lifts, etc.).
• Do not mount the sensor over a
door in a refrigerated area.
• If mounting sensor outdoors, consider prevailing wind direction and proximity to the most likely source of leaks.
Protect the sensor from sun and rain as
much as possible.
• For highly critical locations more
than one sensor should be installed in
each room.
Engine Rooms: The EC sensor
should be mounted in a cool part of the
room, if possible. Keep the sensor away
Sensor must be mounted vertically
Never mount flat on a ceiling
Enter enclosure only through existing hole in bottom
Always make a drip loop in the
conduit
Figure 1: Mounting dimensions for the EC-F2 Sensor
from hot air exhausting from electric
motors or other machinery. Usually the
best location is four or five feet above the
floor in a location where the room exhaust
fan will move air across the sensor from
the potential leak source.
Vehicles: If the unit is mounted in a
vehicle, be sure to shock mount the unit to
isolate it from vibration.
Other Locations: When mounting
EC sensors in locations such as roof top
air units, duct-work, attic spaces, makeup
air intakes, etc., contact Manning Systems for application assistance and recommendations. Figure 1 presents mounting dimensions for the EC-F2 Sensor.
3 MANNING EC-F2-CO SENSOR 305-0112-d
INSTALLATION (CONT’D) 2
B Wiring
Figure 2 presents wiring information
for the EC-F2 sensor.
Electrical wiring must comply with
all applicable codes. Plant equipment
that may be involved and operating conditions should be discussed with local
operating personnel to determine if any
special needs should be taken into account.
Almost all start-up problems are due
to improper wiring or monitor configuration. Please follow these guidelines carefully.
Always use three conductor, insulated, stranded, shielded copper cable.
Use only three conductor cable, not two
cables of two conductor wire.
Do not pull sensor wiring with AC
power cables. This will cause electrical
interference. Be sure there are no breaks
or splices in sensor wiring runs. If cable
runs cannot be made without a splice, all
connections must be soldered. Soldering
should be done using a rosin flux to tie the
connecting ends of sensor wires to ensure
a positive and long-lasting contact.
Ground the shield at the main control
panel. Connect the shield wire in the
sensor terminal block labeled SHLD.
Tape all exposed shield wire at the sensor
to insulate it from the enclosure.
All penetrations into a refrigerated
room should be sealed to prevent condensate from forming in the conduit and dripping into the sensor enclosure. Silicone
should not be used near the sensor, because silicone can damage the sensor.
Make drip loops for cables going into
sensor housings. When heated enclosures are used, follow the special mounting instructions on the enclosure (This
End Up).
Mount sensor enclosures through the
flange holes as shown in Figure 1, and
always mount vertically.
Electrical Power: 24 VDC regulated, 30 mA. With a heated enclosure the
current draw is 300 mA max.
Output: Circuit board mounted sensor provides a linear 4/20 mA output.
Monitoring equipment may have a maximum input impedance of 250 ohms.
Cable Recommendation: No. 18/3
shielded cable (Belden #8770 or equivalent). Length of cable to sensor should be
no greater than 1,500 feet. Use only the
existing punched holes for connections to
the sensor.
Monitoring: The EC-F2 Carbon
Monoxide Sensor may be monitored by
the Manning Systems’ Model 20, GM-1,
GM-JR, GM-10, or other appropriately
configured system. Monitoring equipment must be configured to indicate a
fault if the signal is below 1.5 mA. All
signals over 20 mA must be considered a
high gas concentration.
Connects to signal input of monitoring equipment
Connects to 24 VDC power supply positive side (40300 mA depending on environment)
Connects to 24 VDC ground side
Connects to case ground of monitoring equipment (earth ground)
Figure 2: Wiring diagram for the EC-F2 Sensor
4 MANNING EC-F2-CO SENSOR 305-0112-d
OPERATION 3
A Start-Up Procedures
Before applying power, make a final
check of all wiring for continuity, shorts,
grounds, etc. (see Figure 3, Note 5). It is
usually best to disconnect external alarms
and other equipment from the sensor until
the initial start-up procedures are completed.
After power-up, allow 24 hours for
the system to stabilize before testing the
sensors. Because sensors are normally
located at a distance from the main unit,
the test time required and accuracy of the
response checks will be improved if two
people perform the start-up procedures
and use radio contact.
Start-Up Test:
1) One person exposes each sensor to
a small amount of the gas that is being
monitored.
2) The second person stays at the
control unit to determine that each sensor,
when exposed to the gas fumes, is connected to the proper input and responds,
causing appropriate alarm functions.
• Perform zero adjustment before
spanning.
• Apply span gas at 0.8 L/min (span
gas must be in air, not nitrogen or other
carrier).
• After span gas has been on sensor
for two minutes, adjust the span pot until
the correct output is achieved (see Figure
3, Note 1).
Calibration kits are available from
Manning Systems.
Note 1: Span Adjustment
Note 2: Zero Adjustment
Note 5: Sensor cable plugs in here.
Verify that sensor is plugged in
properly and cable is secured
B Calibration
The EC-F2 Sensor comes factory calibrated and should require minimal adjustments after installation. There are two
pots on the pre-amp that are used for
calibrations.
Zero Calibration: After the unit is
installed and has been powered up for a
minimum of 24 hours, the unit should be
zero calibrated by the following:
• Be sure the unit is in clean air.
• Adjust the zero pot until the sensor
outputs 4.0 mA (40 mV from Test [-] to
Test [+]) (see Figure 3, Note 2 and 4).
Span Calibration: The unit is fac-
tory calibrated and normally does not
need to be spanned upon initial installation. DO NOT ADJUST THE SPAN POT WITHOUT
CERTIFIED
ment is required, the following procedure
will span the unit:
CALIBRATION GAS! If span adjust-
Note 4: Sensor Output
Note 3: Power Supply Voltage
Figure 3: Checking sensor output, power supply voltage, and zero
and span adjustments to the EC-F2 Sensor
5 MANNING EC-F2-CO SENSOR 305-0112-d
OPERATION (CONTINUED) 3
C Troubleshooting
If the sensor output is 0 mA: First,
verify +24 VDC at the sensor terminal
block (see Figure 3, Note 3).
Second, check voltage between Test
(-) and Test (+) (see Figure 3, Note 4).
Voltage should be in the range of 40 mV
to 200 mV corresponding to an actual
current flow of 4 to 20 mA. If this voltage
is 0 mV, the signal has no path to ground.
Check monitoring equipment connections
and configuration. Input impedance must
be 250 ohms or less.
Electrical Interference: This sensor has been designed to be highly resistant to EMI/RFI using multiple stages of
filtering and protection. However, in
extreme environments, some noise pickup
can occur directly through the sensor.
Ensure that the bare shield wire of the
instrument cable is connected to the terminal block marked SHLD at the sensor
(not touching the metal enclosure) and
properly grounded at the readout unit.
Interference Gases: The EC-F2CO is designed to be quite specific to
carbon monoxide. However, hydrogen
can give a slight upscale indication. Carbon monoixide is a colorless, odorless gas
which can’t be sensed by humans at these
levels. Always double check with another
instrument before assuming carbon monoxide is not present.
D Maintenance
For proper operation it is essential
that the test and calibration schedule be
adhered to. Manning Systems recommends the following maintenance schedule:
• Response test once per month. Expose sensor to carbon monoxide to verify
proper sensor response and alarm functions. Test more frequently in highly
critical applications.
• Calibration should be performed
with certified calibration gas every six
months. Calibration kits are available
from Manning Systems.
• All tests and calibrations must be
logged
Sensor Life: These electrochemical
cells are extremely reliable, but several
things can cause the cell chemicals to
become depleted including:
• a period of time,
• exposure to high temperatures,
• exposure to varying concentrations
of the target gas,
• exposure to high moisture for
extended periods without proper
sensor enclosure.
When the cell becomes depleted, the unit
will give no indication of failure other
than that the sensor will not respond. For
this reason it is absolutely essential that
these units be exercised with a gas
sample on a regular and timely basis.
Typical sensor life in a refrigerated
area will be 18 months to 2 years or more.
Typical life in a non-refrigerated area will
be 12 months or less. Exposure to high
levels of carbon monoxide will shorten
these times. In addition to timely response checks, a preventative maintenance
program of periodic cell replacement
should be implemented.
When the cell becomes depleted, a
replacement cell can be obtained from
Manning Systems. Simply unplug the
ribbon cable from the pins labeled Sen-
sor, pull the old cell from the spring clip,
discard the old cell and replace it with a
new one.
The sensor should be calibrated after
a 24 hour warm-up period.
E Replacement Parts
For replacement parts, contact Manning Systems. Be sure to give serial
number of unit and model number.
6 MANNING EC-F2-CO SENSOR 305-0112-d
WARRANTY 4
Limited Warranty
1. Limited Warranty. Manning Systems, Inc. (“Manning”) warrants to the
original purchaser and/or ultimate customer (“Purchaser”) of Manning’s Products (“Product”) that if any part thereof
proves to be defective in material or workmanship within eighteen (18) months of
the date of shipment by Manning or twelve
(12) months from the date of first use by
the purchaser, whichever comes first, such
defective part will be repaired or replaced,
free of charge, at Manning’s discretion if
shipped prepaid to Honeywell at 405
Barclay Blvd, Lincolnshire, IL 60069, in a
package equal to or in the original container. The Product will be returned freight
prepaid and repaired or replaced if it is
determined by Manning that the part failed
due to defective materials or workmanship. The repair or replacement of any
such defective part shall be Manning’s
sole and exclusive responsibility and liability under this limited warranty.
2. Exclusions.
A. If gas sensors are part of the
Product, the gas sensor is covered by a
twelve (12) month limited warranty of the
manufacturer.
B. If gas sensors are covered by this
limited warranty, the gas sensor is subject
to inspection by Manning for extended
exposure to
if a claim by the Purchaser is made under
this limited warranty. Should such inspection indicate that the gas sensor has
been expended rather than failed prematurely, this limited warranty shall not apply to the Product.
cover consumable items, such as batteries, or items subject to wear or periodic
replacement, including lamps, fuses,
valves, vanes, sensor elements, cartridges,
or filter elements.
3. Warranty Limitation and Exclusion. Manning will have no further obli-
gation under this limited warranty. All
warranty obligations of Manning are extinguishable if the Product has been subject to abuse, misuse, negligence, or accident or if the Purchaser fails to perform
any of the duties set forth in this limited
warranty or if the Product has not been
operated in accordance with instructions,
or if the Product serial number has been
removed or altered.
4. Disclaimer of Unstated Warranties. THE WARRANTY PRINTED
ABOVE IS THE ONLY WARRANTY
APPLICABLE TO THIS PURCHASE.
ALL OTHER WARRANTIES, EX-
excessive gas concentrations
C. This limited warranty does not
PRESS OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
5. Limitation of Liability. IT IS UNDERSTOOD AND AGREED THAT
MANNING’S LIABILITY, WHETHER
IN CONTRACT, IN TORT, UNDER
ANY WARRANTY, IN NEGLIGENCE
OR OTHERWISE SHALL NOT EXCEED THE AMOUNT OF THE PURCHASE PRICE PAID BY THE PURCHASER FOR THE PRODUCT AND
UNDER NO CIRCUMSTANCES
SHALL MANNING BE LIABLE FOR
SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES. THE PRICE
STATED FOR THE PRODUCT IS A
CONSID ERATION LIMITIN G
MANNING’S LIABILITY. NO ACTION, REGARDLESS OF FORM, ARISING OUT OF THE TRANSACTIONS
UNDER THIS WARRANTY MAY BE
BROUGHT BY THE PURCHASER
MORE THAN ONE YEAR AFTER THE
CAUSE OF ACTION HAS OCCURRED.
7 MANNING EC-F2-CO SENSOR 305-0112-d
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