XR450 Pocket Data Logger

Number of Channels
Four (4)

Memory technology
FRAM (memory backup power not required, 200 year data retention)

Inputs Accepted
All PACE sensors and probes, 0-5 Vdc, 2-wire resistance (30 kohm midpoint), 3-wire potentiometer (>1 kohm), switch closure. Inputs auto-configure for sensor or input range selected in software. Sensors, probes and input signal types can be mixed in any combination.

Additional input ranges of ±5 Vdc, 0-10 Vdc, 0-20 Vdc, 0-30 Vdc, 0-60 Vdc and 4-20 ma are available using the Input Scaling Module.

Additional input ranges of ±11 mV, ±22 mV, 0-50 mV, and 0-500 mV are available using a Thermocouple / Millvolt Module.

Starting Modes (3)
Start immediate, Start at pre-set time and date, Start on Ch1 Trigger*.

Recording Modes (3)
Record continuously, Record until memory is full, Record until Ch1 Stop Trigger*.

*If Channel 1 is set for a temperature probe or a switch closure (using Pocket Logger Software), the terminal block can be plugged in to start, and/or unplugged to end a logging session (a switch closure can do the same). Ch1 may be set to 'OFF' to maximize memory capacity of 'ON' channels.

NOTE: The Start/Stop Trigger function is a 'one time only' start and/or a 'one time only' stop for a given logging session.

Sampling Rates (20)
2, 4, 6, 10, 20, 30 seconds; 1, 2, 5, 10, 15, 20, 30 minutes; 1, 2, 3, 4, 6, 8, 12 hours.

Timing accuracy: 10 sec. - 12 hr. rates: ± 1 min. / month (-20°C to 60°C)

Timing accuracy: 2, 4, and 6 sec. rates: ± 1 min. / month, unless: If Continuous logging mode has been selected and memory is full: ±4% for 2, 4, & 6 sec rates.

Fast Sampling Rates (8)
200/sec, 100/sec, 50/sec, 20/sec, 10/sec, 5/sec, 2/sec, 1/sec. Note: While recording at fast sampling rates, communication with a PC is not available until logging has stopped.

Timing accuracy, Fast Sampling Rates: ± 0.05%.

Sampling Modes (3)
Single Point, Average (accumulate readings every 2.5 seconds; compute and store average value at preset sample time).

Text Fields (5)
The XR450 Data Logger accepts custom labels for each channel and the logging session. These labels display on the status screen, real time screen, all created graphs and ASCII files.

Real Time Display Mode
XR450 sensor and signal readings are updated every 2.3 seconds (while connected to a computer running Pocket Logger Software). Real Time Display Mode does not affect any ongoing logging session.

Real Time Clock
Counts seconds, minutes, hours, day of week, month, date of month, and year with leap year compensation.
Clock accuracy: +/- 1 min. per month from -20°C to 60°C.

Replaceable 9 volt lithium battery, part # U9VL.  A standard 9 volt alkaline battery can also be used. Battery voltage displays on computer (when logger is connected to a computer running Pocket Logger Software), and is written to each transferred data file.

Battery Life
Battery life depends on selected logging rate and connected sensors. Typical battery life with 4 connected sensors and 1 minute logging interval: 3 to 4 years; with 4 connected sensors and 10 second logging interval: 1.4 to 2.8 years. Battery life varies with current draw of connected sensors (pressure sensors use more power than temperature sensors). All Pace sensors are powered by the XR450's battery. See XR450 Battery Life for details.

Impact-resistant ABS plastic case.

4.70" by 2.40" by .95"
120 mm x 61 mm x 24 mm.

6 ounces; 156 grams (includes battery).

Operating ambient temperature range
-40°C to 60°C. (-40°F to 140°F).

Operating ambient humidity range
0 to 90% relative humidity (non-condensing).

Communications Interface


Communication Speed

19.2 kbps

Data and status transfers to PC (and real time display) do not affect any ongoing logging session.

Recommended sensor cable
Two, three, or four conductor, 22 - 24 gage, stranded copper.

Maximum resistive probe cable length
Using 24 gage shielded cable: 500 feet (150 meters). Greater cable lengths are possible using heavier gage cable.

Input connection
Removable 6 position screw-type terminal block.

Input impedance
Greater than 10 megohms.

Input protection
Over/under voltage protection on all inputs: 40 amps peak 8/20 microseconds.

The XR450 contains no adjustable components; accuracy specifications are maintained by design. Customers may return their Pace loggers for validation (request a quotation) at their designated calibration interval. Each logger validated is returned with an NIST traceable Certificate of Validation. For customer's with their own metrology or calibration lab, an accuracy verification procedure is included in Pocket Logger Software's online help.

Reading Capacity 86,016 readings
Voltage Input Accuracy ±0.25% F.S. (0-5 Vdc)
Voltage Resolution 0.025% of F.S. (0-5 Vdc)
Temperature accuracy
(logger + Pace
PT9xx series probe)
±0.15°C from 0 to 40°C
(±0.27°F from 32 to 104°F)
±0.3°C from -25 to 85°C
(±0.55°F from -13 to 185°F)
Temperature Resolution
(using PT9xx series probe)
0.025°C from 0 to 40°C
0.063°C or better -25 to 75°C
0.125°C or better -45 to 100°C

XR450 Data Logger