Fieldpiece SCM4 User manual

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Quick Start
1. Install 9V battery located in the bat-
tery compartment.
2. PressON/OFFfor1secondtopower
on the SCM4 in a nominal CO envi-
ronment such as outdoors.
Note: 10 second warm up ensues.
3. If necessary, press ZERO while out-
doors to set the ambient CO ppm.
4. Carbonmonoxide(CO)abovenomi-
nal levels will be displayed in parts
per million (ppm.)
5. PressON/OFFfor1secondtopower
off.
Certifications
RCM
CE
WEEE
RoHS Compliant
Description
The SCM4 standalone carbon
monoxide detector measures carbon
monoxide in parts per million (ppm.)
It is intended to measure levels
of CO in still, ambient air. The most
practical application of the SCM4 is
to determine if the indoor CO levels
are higher than outdoor levels and to
determine the source. In many cases,
it can help locate a source of CO.
The SCM4 uses a fast reacting,
electrochemical sensor that does not
consume chemicals and can easily be
replaced in the field if needed. Sensor
life is primarily determined by the
type of exposure.
Precautions
1. Donotmeasuregasengineexhaust
or other high CO or highly contami-
nated gases. High levels of CO and
other contaminants can ruin the
sensor and be a health hazard.
2. Do not take readings directly in
stream of air at register or in a flue.
3. Allow enough time for SCM4 to
reach ambient temperature and
%RH.
Fieldpiece
Carbon
Monoxide
Detector
OPERATOR'S
MANUAL
Model
SCM4
Display
Controls
SCM4
ON/OFF
MUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Hold for one second to toggle power.
SCM4
ON/OFFMUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Cancel out any ambient nomi-
nal CO. (See Zero Set.)
SCM4
ON/OFFMUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Toggle backlight on display.
SCM4
ON/OFF
MUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Mute the beep. Hold for one second to
check % battery remaining.
(Hold while powering ON to disable APO.)
SCM4
ON/OFFMUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Show maximum measurement.
How to Use
"Walk Around" Test
The SCM4 responds almost
instantly to changes in CO levels in
the air. If you see a difference in CO
levels from outside to inside, you
need to find the source of the CO.
Walk around and watch the display.
By constantly going towards the
area of higher concentration, you can
determine the source of the CO.
Persistent sources of CO, such as
malfunctioning combustion equip-
ment in occupied spaces, must be
serviced immediately. These can be
life threatening.
When searching for sources of CO,
make sure that you never put yourself
or anyone else in danger of excessive
exposure to CO. Overexposure to CO
can have long-term health effects
and can be fatal.
Zero Set
As needed, set the reading to zero
in a known zero CO atmosphere and
in a temperature similar to the sample
air to be tested. Zero only when ambi-
ent air is within specifications and
probe is in equilibrium (temperature
and relative humidity) with ambient.
To zero, hold the ZERO button for
one second or until “ZERO” is dis-
played. (Note: For safety reasons the
SCM4 will not zero if reading is above
5ppm.)
SCM4
ON/OFFMUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Specifications
Sensor Type: Electrochemical (specific to CO)
Sensor Calibration:
Factory calibrated @ 17ppm CO and 200ppm CO
Range:
0 to 1000 ppm; 0 to 2000 ppm (less than 5 minute
exposure time)
Initial Accuracy: @ 73°F±9°F, <75% R.H.
0-15ppm ±5% reading ±1 ppm after zeroing
16-35ppm ±5% reading ±2 ppm after zeroing
36-1000ppm ±5% reading ±5ppm after zeroing
Long Term Drift:
less than 5% per year (depending on use)
CO Air Sample Temperature Range:
32 to 105°F
Operating Environment:
32 to 122°F (0 to 50°C);
15 to 90% R.H., non-condensing
Storage Environment: 32 to 68°F (0 to 20°C) at
<80% R.H. with battery removed from meter.
Battery: 9V
Battery Life: 150 hours typical alkaline
Auto Power Off: After 15 minutes
Storage
To maintain sensor integrity, do
not store in areas containing solvent
vapors. This includes aerosols such
as air-freshener, wax polish, window
cleaner, and all organic solvents.
SCM4
ON/OFFMUTE
ZERO
MAX
Carbon
Monoxide
Detector
Measures
CO in PPM.
PRESS FOR
1 SECOND
AUTO-OFF
BATT CHECK
Auto Power Off
(APO) Enabled
Real Time CO ppm
Measurement
Maximum CO ppm
Measurement Instrument Muted
Low Battery
CAUTION
!
Do not take measurements directly at a tailpipe, or at a flue. See "Precautions."
Do not rely solely on a carbon monoxide measurement to determine if a heat exchanger is bad. See“CO Detectors
and Cracked Heat Exchangers" section.
The majority of toxic gas sensors contain sulphuric acid electrolyte and the chemical hazard is mainly related to the
corrosive nature of this compound.These sensors also contain platinum, ruthenium, gold, silver, carbon some of
which are toxic.
Any skin or eye contact with the contents of these sensors should be washed immediately with copious amount of
water. Obtain medical advice.
Electrochemical gas sensors are sealed units containing an aqueous electrolyte and a combination of other sub-
stances as detailed above. Provided these sensors are used only for their intended application they do not
represent a chemical hazard.
The sensors must not be exposed to temperatures outside the range -50°C to 60°C.Toxic gas sensors should not
be exposed to organic vapours which may cause physical damage to the body of the sensor, for example 1, 2
dichloroethane.
Should any sensor be so severely damaged that leakage of the contents occurs then the following procedures
should be adopted.
a. Avoid skin contact with any liquid or internal component through use of protective gloves.
b. Disconnect sensor if it is attached to any equipment.
c. Use copious amounts of clean water to wash away any spilt liquid.This is particularly important in equipment
where the sensor involved contains sulfuric acid or phosphoric acid because of the corrosive nature of these
electrolytes.
WARNING
!
Extended exposure to even relatively low carbon monoxide concentrations can be hazardous to human health.
Evacuate areas of significant CO concentration immediately. See the CO Exposure Effects section of this manual.

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CO Detectors
& Cracked Heat
Exchangers
A CO detector can't tell you if a heat
exchanger is good. A CO detector can
indicate that a heat exchanger may
be cracked only if all of the following
conditions occur simultaneously:
1. The flame must generate high
concentrations of CO (lack of oxygen,
excess fuel, high temp).
2. Enough exhaust gases must be
emitted from the heat exchanger
crack.
3. The exhaust gases from the crack
must not be diluted too much before
coming in contact with the sensor. A
cracked heat exchanger may leak CO
in a small stream. You may measure
high concentrations at one point
but low concentrations only an inch
away.
4. The heat exchanger must be
the only possible source for the CO
detected.
Maintenance
Clean the exterior with a dry cloth.
Do not use liquid.
Battery Replacement
When the meter displays the
battery should be replaced. Turn your
SCM4 off and replace the 9V battery.
Check Your Sensor:
Coffee Cup CO Test
To demonstrate that your CO
sensor works, turn a ceramic coffee
cup upside down and slide it over
the edge of a counter (or desk) to
expose about a third of the mouth
of the cup. Burn a cigarette lighter
inside the exposed mouth of the cup.
Don't burn the counter. When the
flame starts to flicker, you've burned
up most of the oxygen in the cup cre-
ating carbon dioxide and now you're
starting to produce carbon monox-
ide. Bring the flame in and out of the
mouth of the coffee cup to just keep
the flame alive. The longer you keep
the flame flickering, the more CO you
produce. After 10 seconds of flicker-
ing, extinguish the flame and put the
CO head in the mouth of the cup.You
should see readings in the 100s. Take
it out if it approaches 1000PPM.
CO Sensor Replacement
The SCM4 uses a carbon monox-
ide smart sensor. If you are seeing
erratic CO readings or no readings in
a known CO environment, you likely
need to replace the sensor.
1. Obtain replacement sensor model
RCM4 from your local distributor.
2. Removesensorcap by removingthe
4 screws.
3. Directly pull out old sensor.
4. Hold the new sensor by the sides.
While holding the sensor on the
sides;pressdowntosecurethe new
sensor. Donotpressthenewsensor
from the top.
5. If the sensor is incorrectly installed,
"CO Err" will be displayed and the
meter will automatically shut down
after 5 seconds.
Sensor Disposal
The RCM4 replacement carbon
monoxide smart sensor contains
sulfuric as well as precious metals.
The sensor should be recycled prop-
erly through a local electronic waste
center.
Limited Warranty
This meter is warranted against
defects in material or workmanship
for one year from date of purchase.
Fieldpiece will replace or repair the
defective unit, at its option, subject
to verification of the defect.
This warranty does not apply to
defects resulting from abuse, neglect,
accident, unauthorized repair, altera-
tion, or unreasonable use of the
instrument.
Any implied warranties arising
from the sale of a Fieldpiece product,
including but not limited to implied
warranties of merchantability and
fitness for a particular purpose, are
limited to the above. Fieldpiece shall
not be liable for loss of use of the
instrument or other incidental or
consequential damages, expenses,
or economic loss, or for any claim of
such damage, expenses, or economic
loss.
State laws vary. The above limita-
tions or exclusions may not apply to
you.
For Service
In the USA, call Fieldpiece Instru-
ments for one-price-fix-all out of
warranty service pricing. Send check
or money order for the amount
quoted. Send the meter freight pre-
paid to Fieldpiece Instruments. Send
proof of date and location of purchase
for in-warranty service. The meter will
be repaired or replaced, at the option
of Fieldpiece, and returned via least
cost transportation. Outside of the
USA, please visit www.fieldpiece.com
for service contact information.
www.fieldpiece.com
©Fieldpiece Instruments, Inc 2018; v10
More from
Fieldpiece
CO Exposure Effects
Note: Effects can vary significantly depending on
age, sex, weight, and overall health.
9 ppm Minimal.Maxallowableconcentration
for eight hours (EPA and ASHRAE).
35 ppm Max for continuous exposure for one
hour (EPA and ASHRAE).
50 ppm Max for eight hours (OSHA).
100 ppm Trips installed CO detectors. UL2034
specifies a max exposure of 100 min.
200ppm
In two to three hours: slight
headache, tiredness, dizziness,
nausea. UL2034 specifies a max
exposure of 35 min.
400 ppm
In one or two hours: frontal
headaches. In three hours: life
threatening. UL2034 specifies a max
exposure of 15 minutes.
800 ppm In forty five minutes: dizziness,
nausea, and convulsions.
800 ppm In two to three hours: death.
1600 ppm In one hour: death.
6400 ppm In fifteen minutes: death.
12800 ppm In three minutes: death.
APO MAXMIN HOLD SET
CO2
EA
MAX
°F %
%
°C
ENTER
AUTO-OFF
°F
°C
TEMPCAL
PRESSFOR
1SECOND
SOX3
Combustion
Check
Excess Air,
%CO
2
and %O
2
Natural
Gas
Oil
#2
PropaneCustom
EXHAUST
CLEAR
SETCUSTOM
ON/OFF
FUEL
MAX/MIN
MEASURE/HOLD
ADMN2
Dual-Port
Manometer
Accessory
Head
P1
P2
P1-P2
ON
0.1 ENGLISH
METRIC
0.01
(LCD/10)
Lo Batt
Resolution
ZERO AUTO
OFF
P1 P2
80
AAT3
In-Duct
Psychrometer
& Air Velocity
Head
ON
LO BATTAVG
ENGLISH
ENGLISH METRIC
RH%
Ft/min
°F
RH%
M/s
°C
METRIC
DRY BULB
WET BULB
DEW POINT
AVG
NORMAL
AUTO OFF
SVG3
Fieldpiece
VACUUM
GAUGE
MIN
ALARM
ENTER
UNITS
Digital Refrigerant Manifolds
Accessory Heads
CombustionCheck withAutoPump Vacuum Gauge
Incorrect