ACR Systems Inc.
ISO 9001 registered

Chinese version

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Temperature, Relative Humidity and 
0-5 Volt Data Logger

Conservation Logger 

Size: 107 mm x 74 mm x 22 mm (4.2" x 2.9" x 0.9")
Weight: 110 g (3.75 oz)
Case Material: Noryl® plastic
Battery: 3.6 volt Lithium, 1 Amp-Hour
Battery Life: 5 years under normal use (factory replaceable)
Mounting: Magnetic backing or locking eyelet
Clock Accuracy: +/- 2 seconds per day
Operating Limits: -40 to 70 °C (-40 to 158 °F) and 0 to 95% relative humidity (non-condensing)
Memory Size: 128 KB (capable of storing up to 87,000 readings)
Channels: One internal temperature channel
One internal relative humidity channel
Two 0-5 Volt DC inputs for optional sensors (i.e. light sensor)
Sampling Methods: 1.  Continuous (First-in, First-out) – not available with sample rates faster than 8 seconds
2.  Stop when full (Fill-then-stop)
Sampling Rates: User selectable rates from 25 per second (0.04 seconds) to once every 8 hrs
*BP-101 Battery Pack or PS-201 Power Supply required for sample rates faster than 8 seconds (see Accessories section for details)
Resolution: 12-bit (1 part in 4096)
PC Requirements: IBM PC or 100% compatible, with at least 2 MB RAM, 2 MB of hard drive disk space and one free serial port
Software Requirements: TrendReader® Standard - compatible with Windows® 3.1, 95, 98, 2000, Me, NT and XP
Sensor Specifications: Temperature Sensor
Type:  NTC Thermistor
Range: -40 to 70ºC (-40 to 158ºF)
Accuracy:  +/- 0.2ºC over the range of 0 to 70ºC (+/- 0.3ºF over the range of 32 to 158ºF)
Resolution: 0.03ºC at 25°C (0.05ºF at 77°F); better than 0.07ºC (0.12°F) between -25 and 70°C (-13 and 158°F); better than 0.13ºC (0.23°F) between -40 and -25°C (-40 and -13°F)

RH Sensor
Type:  Capacitive thin polymer film
Range: 0 to 95% RH
Accuracy:   +/- 3% RH from 10 to 90% (-20 to 40ºC [-4 to 104ºF])
Resolution:  Better than 0.04% RH between 25 and 60% RH at 25ºC (77ºF)

External Sensors (2)
Range:  Any two sensors with a 0-5 VDC output
Calibration: Factory calibration verification and NIST certificates are available upon special request.
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