User Guide

Test Tools HVACR Pros Trust
CO ppm Limits/Eects
9 ppm Minimal eects, but is the max allowable concentration for 8 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.
200 ppm 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 two to three hours: death.
1600 ppm In one hour: death.
6400 ppm In fteen minutes: death.
12800 ppm In three minutes: death.
Eects can vary signicantly depending on age, sex, weight, and overall health.
Never stay in an area of high concentration of CO, get outdoors and call emergency response .
CO Exposure Eects
Fast and Easy Sensor
Replacement
The SCM4 and ACM4 replacement sensor (RCM4)
comes electronically calibrated, and can be purchased
directly from your distributor. Simply plug in your new
sensor and your SCM4 and ACM4 are automatically
calibrated to factory standards. With normal use, the
RCM4 lasts for approximately two years. Sensor life is
highly dependent on exposure to contaminants, and
repeated exposure to contaminants can shorten the
life of the sensor.
Carbon
Monoxide
Accessory
Head
ON
AVERAGE
LOW BATT
ON
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