Spectrum 3440 Product Manual

Temp / RH / CO2

Hand-Held Meter

PRODUCT MANUAL

Item # 3440

CONTENTS

Specifications 2
Battery 3
LCD Display 3
Keypad 3
Operation 4
Troubleshooting 7
Warranty 8
CE Declaration of Conformity 8

Thank you for purchasing the Temp/RH/CO2 Hand-Held
Meter. With an NDIR (non-dispersive infrared) CO
this unit is stable for long-term monitoring. Please read this
manual thoroughly before using your meter.

sensor,

2

Specifications

CO2

Range 0 to 5000 ppm
Accuracy ±50ppm, ±5% of reading

Pressure Dependence +1.8% reading / 10hPa deviation from 1000hPa

Temperature

Range -14 to 140°F (-10 to 60°C)
Accuracy ±0.9°F (±0.6°C)

Humidity

Range 0 to 99.9% RH
Accuracy ±3% (10-90%), ±5%(other)

Warm up 30 seconds
Power 4 AA batteries (or 9VDC, 1A adaptor, not incl.)
Battery life 24 hours (alkaline)

2

Battery

Install the 4 AA batteries into the battery compartment on the rear
and make sure they are in correct polarity.

When the battery voltage gets low, the battery
icon and “Lob” will appear on the LCD, and the
beeper will sound (press any key to stop the
beeps).

LCD Display

Symbols
HOLD Readings are frozen
TWA Time weighted average (8 hours)
STEL Short-term exposure limit (15 min wt avg)
MIN/MAX Minimum/Maximum readings
DP Dew point temperature
AIR Air temperature
WBT Wet bulb temperature

Keypad

3