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CO Detectors
CO Exposure Effects
& Cracked Heat
9 ppm
Exchangers
35 ppm
A CO detector can't tell you if a heat
exchanger is good. A CO detector can
50 ppm
indicate that a heat exchanger may
be cracked only if all of the following
100 ppm
conditions occur simultaneously:
1. The flame must generate high
200ppm
concentrations of CO (lack of oxygen,
excess fuel, high temp).
2. Enough exhaust gases must be
emitted from the heat exchanger
400 ppm
crack.
3. The exhaust gases from the crack
must not be diluted too much before
800 ppm
coming in contact with the sensor. A
cracked heat exchanger may leak CO
800 ppm
in a small stream. You may measure
1600 ppm
high concentrations at one point
but low concentrations only an inch
6400 ppm
away.
12800 ppm
4. The heat exchanger must be
the only possible source for the CO
Note:
detected.
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Limited Warranty
For Service
This meter is warranted against
In the USA, call Fieldpiece Instru-
defects in material or workmanship
ments for one-price-fix-all out of
for one year from date of purchase.
warranty service pricing. Send check
Fieldpiece will replace or repair the
or money order for the amount
defective unit, at its option, subject
quoted. Send the meter freight pre-
to verification of the defect.
paid to Fieldpiece Instruments. Send
This warranty does not apply to
proof of date and location of purchase
defects resulting from abuse, neglect,
for in-warranty service. The meter will
accident, unauthorized repair, altera-
be repaired or replaced, at the option
tion, or unreasonable use of the
of Fieldpiece, and returned via least
instrument.
cost transportation. Outside of the
Any implied warranties arising
USA, please visit www.fieldpiece.com
from the sale of a Fieldpiece product,
for service contact information.
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.
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Maintenance
Clean the exterior with a dry cloth.
Minimal. Max allowable concentration
Do not use liquid.
for eight hours (EPA and ASHRAE).
Battery Replacement
Max for continuous exposure for one
hour (EPA and ASHRAE).
When the meter displays
battery should be replaced. Turn your
Max for eight hours (OSHA).
SCM4 off and replace the 9V battery.
Trips installed CO detectors. UL2034
specifies a max exposure of 100 min.
Check Your Sensor:
In two to three hours: slight
Coffee Cup CO Test
headache, tiredness, dizziness,
nausea. UL2034 specifies a max
To demonstrate that your CO
exposure of 35 min.
sensor works, turn a ceramic coffee
In one or two hours: frontal
cup upside down and slide it over
headaches. In three hours: life
the edge of a counter (or desk) to
threatening. UL2034 specifies a max
expose about a third of the mouth
exposure of 15 minutes.
of the cup. Burn a cigarette lighter
In forty five minutes: dizziness,
inside the exposed mouth of the cup.
nausea, and convulsions.
Don't burn the counter. When the
In two to three hours: death.
flame starts to flicker, you've burned
up most of the oxygen in the cup cre-
In one hour: death.
ating carbon dioxide and now you're
In fifteen minutes: death.
starting to produce carbon monox-
In three minutes: death.
ide. Bring the flame in and out of the
mouth of the coffee cup to just keep
Effects can vary significantly depending on
the flame alive. The longer you keep
age, sex, weight, and overall health.
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©Fieldpiece Instruments, Inc 2018; v10
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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.
the
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. Remove sensor cap by removing the
4 screws.
3. Directly pull out old sensor.
4. Hold the new sensor by the sides.
While holding the sensor on the
sides; press down to secure the new
sensor. Do not press the new sensor
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.
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Combustion Check with AutoPump
Digital Refrigerant Manifolds
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APO
MAXMIN HOLD
SET
%
CO
2
MAX
°F
%
°C
EA
In-Duct
ON
Psychrometer
Natural
Oil
Propane Custom
& Air Velocity
Gas
#2
AVG
LO BATT
Head
ENGLISH
AVG
DRY BULB
ON/OFF
WET BULB
DEW POINT
METRIC
NORMAL
AUTO-OFF
PRESS FOR
1 SECOND
ENGLISH
METRIC
MEASURE/HOLD
RH%
RH%
Ft/min
M/s
°F
°C
ENTER
°F
SET CUSTOM
FUEL
AUTO OFF
MAX/MIN
°C
CLEAR
Combustion
AAT3
Check
Excess Air,
%CO
and %O
2
2
TEMP CAL
EXHAUST
SOX3
Accessory Heads
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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.
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P1
P2
80
Dual-Port
Manometer
ON
Accessory
Head
Lo Batt
0.1
ENGLISH
Resolution
0.01
METRIC
(LCD/10)
P1-P2
P2
P1
MIN
ZERO
AUTO
SVG3
OFF
VACUUM
GAUGE
ALARM
ADMN2
ENTER
UNITS
Fieldpiece
Vacuum Gauge
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