Digital Pocket Size Carbon Monoxide Meter

The Model 450A-1 Digital Pocket Size Carbon Monoxide Meter measures the ambient concentration of carbon monoxide (CO) in the environment and displays the measurement on the two line digital LCD screen. Besides the measurement, the maximum recorded CO value since the last reset is shown. An audible carbon monoxide alarm gives warning of CO levels above 25 ppm. For viewing in poorly lit environments, the built-in back light brightens the display. Model 450A-1 includes soft carrying case with belt loop, wrist strap, and three AAA batteries

WARNING:

• Recovery time is needed when the meter has been exposed to high levels of CO and the alarm has gone off. The longer the exposure, the longer recovery time needed.
• Meter must be kept from electromagnetic interference. Exposure may cause unreliable readings.
• Self-test after power on is required to test the sensor and circuit condition.

Resetting Max CO Level
The maximum CO level detected will be displayed on the lower line of the display. It can be reset by pushing and holding the button for two seconds while in normal operation.

Automatic Power Off (Sleep Mode)
The instrument will shut off automatically after 15 minutes if no buttons are pressed. The meter will NOT turn off during calibration mode.

BATTERY REPLACEMENT
The Digital Pocket Size Carbon Monoxide Meter incorporates a visual low battery indication. When the “Low battery symbol” appears, the 3 AAA alkaline batteries need to be replaced. Another sign that the batteries need to be replaced is when the thermometer fails to power on.