Fieldpiece SCM4 Operator's Manual

Fieldpiece
Quick Start
1. Install 9V battery located in the bat-
Carbon Monoxide
2. Press ON/OFF for 1 second to power
Detector
OPERATOR'S
3. If necessary, press ZERO while out-
MANUAL
4. Carbon monoxide (CO) above nomi-
Model
SCM4
5. Press ON/OFF for 1 second to power
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
ZERO
oxide
nominal CO. (See Zero Set.)
ector
ures
Toggle backlight on display.
PPM.
MAX
MUTE
MUTE
SCM4
AUTO-OFF
07 08
BATT CHECK
MUTE ON/OFF
Carbon
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.
C-Tick (N22675)
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
determine the source of the CO.
Low Battery
Persistent sources of CO, such
as malfunc tioning combustion
equipment in occupied spaces, must
be serviced immediately. These can be
MAX
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.
or anyone else in danger of excessive
(Hold while powering ON to disable APO.)
AUTO-OFF PRESS FOR
MAX
BATT CHECK 1 SECOND
exposure to CO. Overexposure to CO
Carbon
Monoxide can have long-term health effects and
Detector Show maximum measurement.
MAX
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.
3. Allow enough time for SCM4 to reach
ambient temperature and %RH.
Detectors and Cracked Heat Exchangers" section.
4. The sensor has built-in permanent
to the corrosive nature of this compound. These sensors also contain platinum, ruthenium, gold, silver, carbon
non-replaceable filter to filter out
some of which are toxic.
trace concentrations of SO , NO ,
2 2
and most hydrocarbons. If exposed
of water. Obtain medical advice.
to high concentrations of harmful
chemicals such as methanol, etha-
substances as detailed above. Provided these sensors are used only for their intended application they do not
represent a chemical hazard.
nol, or dirt, the filter can deteriorate
and/or impede diffusion of CO to
not be exposed to organic vapours which may cause physical damage to the body of the sensor, for example 1,
the sensor.
2 dichloroethane.
should be adopted.
04 05
Zero Set

Specifications

As needed, set the reading to zero in
Sensor Type: Electrochemical (specific to CO)
a known zero CO atmosphere and in a
Sensor Calibration: Factory calibrated @ 205
temperature similar to the sample air
ppm CO
to be tested. Zero only when ambient
Range: 0 to 1000 ppm;
air is within specifications and probe 0 to 2000 ppm (less than 5 minute exposure
time)
is in equilibrium (temperature and
Initial Accuracy: @ 73°F±9°F, <75% R.H.
relative humidity) with ambient.
0-15ppm ±5% reading ±1 ppm after zeroing
To zero, hold the ZERO button
16-35ppm ±5% reading ±2 ppm after zeroing
for one second or until "ZERO" is
36-1000ppm ±5% reading ±5ppm after
displayed. (Note: For safety reasons zeroing
Long Term Drift: less than 5% per year
the SCM4 will not zero if reading is
(depending on use)
above 5ppm.)
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.
10 11
!
Extended exposure to even relatively low carbon monoxide concentrations can be hazardous to human health.
!
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
The majority of toxic gas sensors contain sulphuric acid electrolyte and the chemical hazard is mainly related
Any skin or eye contact with the contents of these sensors should be washed immediately with copious amount
Electrochemical gas sensors are sealed units containing an aqueous electrolyte and a combination of other
The sensors must not be exposed to temperatures outside the range -50°C to 60°C. Toxic gas sensors should
Should any sensor be so severely damaged that leakage of the contents occurs then the following procedures
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.
12