Product Overview

Carbon
Monoxide
Detector
Model SCM4
Versatile
Rugged
Easy to Use
The model SCM4 standalone carbon monoxide detector measures low levels of carbon
monoxide in parts per million (ppm). It is intended to measure levels of CO in still ambient air. The
most practical application is to determine if the indoor CO levels are higher than outdoor levels
and to determine the source of higher concentration. In many cases, it can help locate sources of
CO. It uses a high quality eld replaceable sensor with a life primarily determined by the type of
exposure.
Walk Around Testing
The SCM4 is fast enough to respond instantly to changes in CO levels. If you see a difference
in CO levels from outside to inside, you need to nd the source of CO. Walk around and watch
the display. By constantly going towards the area of highest concentration, you can determine
the source of CO. Persistent sources of CO, such as malfunctioning combustion equipment in
occupied spaces, must be serviced immediately. 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.
Reacts fast to find CO sources during “walk around” tests.
New and improved field replaceable smart sensor (model RCM4.)
Alarm can be muted.
Max function.
Rubber boot for added protection.
Rugged mechanical design.
Bright blue backlight.
Magnetic hanger for hands free operation.
Standard 9V battery with auto power off to save battery life.
Features
© Fieldpiece Instruments, Inc. 2013
Range:
Air sample range:
Initial accuracy:
 @73°F±9°F,<75%RH;
after zeroing
Sensorcalibration:
Sensor type:
Operatingenvironment:
Battery:
Battery life:
Auto-off:
0 to 1000 ppm (continual use)
0 to 2000 ppm (5min max exposure)
32°F to 105°F (0 to 41°C)
15% to 90% relative humidity
0 to 15 ppm: ±5%rdg ±1ppm
16 to 35 ppm: ±5%rdg ±2ppm
36 to 1000 ppm: ±5%rdg ±5ppm
Factory calibrated at 205 ppm.
Electrochemical (specic to CO)
32°F to 122°F (0 to 50°C)
9V (included)
150 hrs typical (alkaline)
15 minutes
Specications
Model:SCM4H27-620
13 15 1814 1716
19 21 2420 2322
CO Detectors and
Cracked Heat
Exchangers
A CO detector cannot 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 ame must generate high con-
centrations of CO (lack of oxygen,
excess fuel, high temp).
2. Enough exhaust gases must be emit-
ted 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 o and replace the 9V battery.
CO Sensor Replacement
The SCM4 uses a carbon monoxide
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. Remove sensor cap by removing the
4 screws.
2. Directly pull out old sensor.
3. Align plug of new sensor and care-
fully press into place.
4. If the sensor is incorrectly installed,
"CO Err" will be displayed.
To obtain an SCM4 replacement CO
sensor (model# RCM4) contact your
local distributor.
Optional Pump
Use the model AOXP2 pump to
extract samples from hard to reach
places or from locations where the
temperature is high (such as a ue).
For potentially high concentrations
of CO, pump slowly and stop if the
measurement approaches 2000PPM.
Carbon monoxide concentrations
will begin to show in two or three
squeezes. For final reading, pump
until the reading stabilizes, about 30
squeezes.
Press MAX on the SCM4 to hold
highest reading.
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 verication of the defect.
This warranty does not apply to
defects resulting from abuse, neglect,
accident, unauthorized repair,
alteration, 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
limitations or exclusions may not
apply to you.
For Service
In the USA, call Fieldpiece
Instruments for one-price-x-all out
of warranty service pricing. Send
check or money order for the amount
quoted. Send the meter freight
prepaid 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.eldpiece.com
©Fieldpiece Instruments, Inc 2013; v01
More Instruments
from Fieldpiece
CO Exposure Effects
Note: Eects can vary signicantly depending on
age, sex, weight, and overall health.
9 ppm
Minimal. Max allowable concentration
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
species a max exposure of 100 min.
200ppm
In two to three hours: slight
headache, tiredness, dizziness,
nausea. UL2034 species a max
exposure of 35 min.
400 ppm
In one or two hours: frontal
headaches. In three hours: life
threatening. UL2034 species a max
exposure of 15 minutes.
800 ppm
In forty ve minutes: dizziness,
nausea, and convulsions.
800 ppm In two to three hours: death.
1600 ppm In one hour: death.
6400 ppm In fteen minutes: death.
12800 ppm In three minutes: death.
AirVelocity
&Temperature
Head
English
READLO BATT
ON
LCD X
100
Average
(16 sec)
Metric
Real
time
AAV3
AUTO-
OFF
English Metric
Ft/min M/s
KM/hrMPH
ºF ºC
OFF
AUTO OFF
ARH4
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
CAT.III
300V
400A
CLAMP
ACH4
AC Current
Clamp
1AAC / 1mVAC
400AAC MAX
!
ET2W
LO BATT
SEND
RECEIVE
ON
AC
DC
Wireless
Transmitter
SYNC
FUSED
200
m
A
MAX
FUSED
30V
MAX
WIRELESS
ENABLED
MAX/MIN
SYNC HOLD
CAT.III
MAX
600V
15 SEC FOR
500
m
V
RANGE
AUTO-OFF
500
600600
50
5000m
500m
500µ
50m
200m
200m
500m
5000m
50m
50
500
500µ
500
750
500
1400
200
2
K
200
20
M
2
K
200
K
20
RECV
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
T2
P1
P1
P2
ZERO
HOLD UNIT
ON/OFF
P2
88.88
APO
88.88
inWC
mmWC
mbar
psi
HOLD
PRESS FOR 1 SECOND
AUTO-OFF BATTERY
CHECK
Digital Refrigerant Manifolds
Accessory Heads
Wireless Measurements
Dual-Port Manometer
CO Effects
Serial Number