Dwyer Instruments 450 Series Instructions And Operation

*NOTE:
This instrument is shipped with a new 9V bat-
tery. However, there is a protective plastic cap installed on
the battery terminals. This cap must be removed and the
battery connected to the battery terminal before the instru-
ment will function.
The Series 450 CO Monitor measures car-
bon monoxide from levels 0 to 2000 PPM. The
unit is equipped with audible and visual indica-
tors of CO concentration. The beacon indica-
tor flashes in correspondence to the level of
CO detected in the air. Perfect for HVAC appli-
cations such as servicing heaters, furnaces,
appliances and for general building inspection.
BATTERY INSTALLATION
Remove two screws holding the bottom end-
cap labeled BATTERY in place and remove it.
Connect the battery to the enclosed battery
clip observing correct polarity. Insert the bat-
tery in the case. Be careful not to trap the
wires between the case or foam pad, which
retains the battery. This could make it difficult
to install the battery or remove it later for
replacement. Be sure the rubber gasket is
properly seated in the gasket channel and
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Series 450 Carbon Monoxide Monitor
Instructions and Operation
SPECIFICATIONS
Range: 0-2000 PPM.
Resolution: 1 PPM.
Accuracy: (using 200 PPM calibration gas)
±3% of reading ± the accuracy of the cali-
bration gas, at the time of calibration.
Response Time: <30 seconds to 90% of
reading.
Operating Temperature: 32° to 104°F
( 0° to 40°C).
Humidity Conditions: 0-90% Relative
Humidity Non Condensing.
Adjustments: Zero and Span via keypad.
Power*: 9V Battery.
Battery Life: 500 hours typical
Case Material: Anodized Aluminum with
plastic end caps.
Dimensions: 6.8˝ L x 2.8˝ W x 0.9˝ D
except add 0.5˝ D for sensor cover.
(172.7 x 71.1 x 22.9 mm) (12.7mm).
Sensor Type: Field replaceable
Electrochemical Cell.
Sensor Life: 2 years minimum.
Alarms: 2 Alarms, with audible and visual.
replace the endcap. Note that the endcap will
only fit one way because the holes are slightly
off-center. Place the "Z" shaped wrist strap clip
in one of the screw recesses and replace the
screw. Do not overtighten. Attach the wrist
strap to the clip.
Use only 9 Volt alkaline type batteries such as
Duracell MN1604, or Eveready
®
equivalent. Zinc-carbon types, often labeled
Heavy-Duty are not recommended because of
their shorter life and increased potential for
leakage. Alkaline batteries are a better value
because they typically last up to three times
longer in this device.
Duracell is a registered trademark of Duracell USA, a division of
®
Duracell Inc.
Eveready is a registered trademark of Eveready Battery Company Inc.
®
Phone: 219/879-8000
Fax: 219/872-9057
Lit-By Fax: 888/891-4963
Bulletin D-25
522, or
®
www.dwyer-inst.com
e-mail: info@dwyer-inst.com