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Validatable Temperature Logger

Portable self-contained temperature data logger for critical pharmaceutical validation applications
Equipped with internal temperature sensor, memory and ten-year battery
Tamper-proof operation produces reliable and secure documentation for validation records
Password-protected setup, download and calibration functions ensure integrity of collected data
Records temperature without wires, power cords or connections
Traceable instrument-grade temperature measurement accuracy
Adjustable logging intervals with multi-year data recording capacity
High-stability temperature sensor offers exceptional long-term data logger accuracy and in-calibration performance
External input for remote temperature probe flexibility

Technical Specifications

General

Size	2.8 x 2.1 x 0.7" (71x53x18mm); 60g (2.2 oz)
Operating Range	-40 to 85°C (-40 to 185°F) and 0 to 100% RH
Interfaces	RS-232 serial port; half-duplex; 19,200 baud. USB interface available through USB Logger Cable. Ethernet network interface available through Ethernet-to-serial adapter. Contact Veriteq for more information.
Mounting	Magnetic strips; velcro optional
PC Software	Designed for use with vLog Software
Clock	Accuracy: +/- 1 min./month at 0 to 50°C
Electromagnetic Interference	Meets FCC Part 15 for digital devices; meets CE requirements for radiated emissions, electrostatic discharge, & radiated susceptibility.
Power Source	Internal lithium battery with life of 10 years at 1 min. sampling rate.

Temperature Accuracy

Sensor	Measuring Range	Precision	One year Accuracy	Sensor Stability

Internal	-40 to 85°C	0.05°C at 25°C	+/-0.15°C¹ over 20 to 30°C	< 0.1°C over 10 years at 75°C

Remote²	-50 to 150°C	0.05°C at 25°C	+/- 0.25°C⁴ over 20 to 30°C	< 0.1°C over 10 years at 75°C

Over -20 to 70°C: +/-0.25°C
With optional EPT-010 remote temperature probe (Please contact Veriteq for specifications using other temperature probes)
For precision over wider range, refer to graph below
Over -20 to 70°C: +/-0.35°C

Temperature Precision Graph

The following graph details VL-1000 temperature precision over rated measuring ranges (as specified in above table). Solid graph line represents values for internal temperature sensor. Dotted line represents values for remote temperature sensor.

Internal Temperature Sensor

Type of Sensor	Precision-tolerance epoxy-encapsulated NTC thermistor
Response Time	10 seconds in moving air (thermistor only)

Remote Temperature Probe Input

Compatibility	Accepts one EPT-010 temperature probe. Contact factory for resistance-temperature curve information
Input Connection	Pluggable screw-type terminal block accepts bare leads or EPT-010 - compatible temperature probe connector.

Memory

Memory Type	Non-volatile 32K x 8 EEROM
Data Sample Capacity	21,500 12-bit samples
Memory Modes	User-selectable: Wrap when memory full, or Stop when memory full.
Memory Protection	Data retention > 20 years backup without power.
Sampling Rates	User-selectable (in intervals of 10 seconds) from once every 10 seconds to once a day.
Recording Span	Recording span depends on sample interval selected and number of channels enabled. Chart below details typical sampling rates and length of time logger will retain data in memory before wrapping around or stopping (see Memory Modes).

Sample Interval	Recording Span
Sample Interval	1 channel	2 channels
10 seconds	60 hours	30 hours
1 minute	14.9 days	7.4 days
15 minutes	7.5 months	3.7 months
1 hour	2.4 years	1.2 years
3 hours	7.3 years	3.6 years