Fieldpiece SCM4 Operator's Manual

Fieldpiece
Quick Start
1. Install 9V battery located in the bat-
Carbon
2. Press ON/OFF for 1 second to power
Monoxide
Detector
3. If necessary, press ZERO while out-
OPERATOR'S
4. Carbon monoxide (CO) above nomi-
MANUAL
Model
5. Press ON/OFF for 1 second to power
SCM4
Certifications
MAX
MUTE ON/OFF
AUTO-OFF PRESS FOR
BATT CHECK 1 SECOND
Carbon
Monoxide
Detector
Measures
CO in PPM.
ZERO
SCM4
01 02
Display
Auto Power Off
(APO) Enabled
Real Time CO ppm
Measurement
MAX
Maximum CO ppm
Measurement
MUTE ON/OFF
AUTO-OFF PRESS FOR
BATT CHECK 1 SECOND
Carbon
Monoxide
Detector
MAX
Controls
Measures
CO in PPM.
Hold for one second to toggle power.
ON/OFF
PRESS FOR
1 SECOND
bon
Cancel out any ambient nomi-
ZERO
oxide
nal CO. (See Zero Set.)
ector
ures
Toggle backlight on display.
PPM.
MAX
MUTE
SCM4
MUTE
MUTE ON/OFF
AUTO-OFF
07 08
BATT CHECK
ZERO
Carbon
AUTO-OFF PRESS FOR
Description
The SCM4 standalone carbon
tery compartment. monoxide detector measures carbon
monoxide in parts per million (ppm.)
on the SCM4 in a nominal CO envi- It is intended to measure levels
ronment such as outdoors. of CO in still, ambient air. The most
Note: 10 second warm up ensues. practical application of the SCM4 is
to determine if the indoor CO levels
doors to set the ambient CO ppm.
are higher than outdoor levels and to
determine the source. In many cases,
nal levels will be displayed in parts it can help locate a source of CO.
per million (ppm.)
The SCM4 uses a fast reacting,
electrochemical sensor that does not
off. consume chemicals and can easily be
replaced in the field if needed. Sensor
life is primarily determined by the
type of exposure.
RCM
CE
WEEE
RoHS Compliant
03
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
Instrument Muted
area of higher concentration, you can
Low Battery determine the source of the CO.
Persistent sources of CO, such as
malfunctioning combustion equip-
ment in occupied spaces, must be
MAX
serviced immediately. These can be
life threatening.
When searching for sources of CO,
Mute the beep. Hold for one second to
MUTE ON/OFF
make sure that you never put yourself
check % battery remaining.
(Hold while powering ON to disable APO.) or anyone else in danger of excessive
AUTO-OFF PRESS FOR
MAX
BATT CHECK 1 SECOND
Carbon exposure to CO. Overexposure to CO
Monoxide
can have long-term health effects
Detector Show maximum measurement.
MAX
and can be fatal.
Measures
CO in PPM.
ON/OFF
ON/OFF
PRESS FOR
09
1 SECOND
Precautions
1. Do not measure gas engine exhaust
WARNING
or other high CO or highly contami-
nated gases. High levels of CO and
Evacuate areas of significant CO concentration immediately. See the CO Exposure Effects section of this manual.
other contaminants can ruin the
sensor and be a health hazard.
2. Do not take readings directly in
CAUTION
stream of air at register or in a flue.
Do not take measurements directly at a tailpipe, or at a flue. See "Precautions."
3. Allow enough time for SCM4 to
Do not rely solely on a carbon monoxide measurement to determine if a heat exchanger is bad. See "CO Detectors
reach ambient temperature and
%RH.
The majority of toxic gas sensors contain sulphuric acid electrolyte and the chemical hazard is mainly related to the
Any skin or eye contact with the contents of these sensors should be washed immediately with copious amount of
Electrochemical gas sensors are sealed units containing an aqueous electrolyte and a combination of other sub-
The sensors must not be exposed to temperatures outside the range -50°C to 60°C. Toxic gas sensors should not
Should any sensor be so severely damaged that leakage of the contents occurs then the following procedures
04 05
Specifications
Zero Set
As needed, set the reading to zero
Sensor Type: Electrochemical (specific to CO)
in a known zero CO atmosphere and Sensor Calibration:
Factory calibrated @ 17ppm CO and 200ppm CO
in a temperature similar to the sample
Range:
air to be tested. Zero only when ambi-
0 to 1000 ppm; 0 to 2000 ppm (less than 5 minute
ent air is within specifications and
exposure time)
probe is in equilibrium (temperature
Initial Accuracy: @ 73°F±9°F, <75% R.H.
and relative humidity) with ambient.
0-15ppm ±5% reading ±1 ppm after zeroing
16-35ppm ±5% reading ±2 ppm after zeroing
To zero, hold the ZERO button for
36-1000ppm ±5% reading ±5ppm after zeroing
one second or until "ZERO" is dis-
Long Term Drift:
played. (Note: For safety reasons the
less than 5% per year (depending on use)
SCM4 will not zero if reading is above
CO Air Sample Temperature Range:
5ppm.)
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
10 11
!
Extended exposure to even relatively low carbon monoxide concentrations can be hazardous to human health.
!
and Cracked Heat Exchangers" section.
corrosive nature of this compound. These sensors also contain platinum, ruthenium, gold, silver, carbon some of
which are toxic.
water. Obtain medical advice.
stances as detailed above. Provided these sensors are used only for their intended application they do not
represent a chemical hazard.
be exposed to organic vapours which may cause physical damage to the body of the sensor, for example 1, 2
dichloroethane.
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.
06
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.
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