GE Kaye, Inc.: Resources: FAQ: Valprobe
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FAQ

ValProbe™



Why would I use ValProbe instead of a Validator® 2000?
With its wireless design the ValProbe system is ideally suited for monitoring hard to reach, remote, and even moving environments, which are difficult to load with thermocouples. EtO sterilzation, conveyors, tunnels, ovens and incubators all lend themselves to wireless monitoring. For applications that present real challenges for thermocouple wiring, and where real time monitoring is not required, ValProbe is a great solution.

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Does ValProbe meet 21 CFR part 11 and if yes, how is this done?
ValProbe was designed as a fully validated closed system with two levels of security access. The ValProbe system generates accurate and complete records in both, human readable and electronic formats which cannot be changed or modified (modification attempts render files unusable). The unique user name / ID combination comprises the electronic signature required for traceability and audit purposes. The ValProbe software maintains an audit trail that provides a complete listing of each event that affects the integrity of the ValProbe PC program, Loggers, and calibration, verification and qualification study files. The audit trail lists events for the current month by date/time, event, who performed the event, and that individual's permission level.

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How do the loggers synchronize time-wise?
Each logger is synchronized to the current date and time at the instant a study is initialized in the newly programmed logger. Thereafter the loggers will be synchronized to within +/- 15 seconds per day, the accuracy of the timer within the logger. The standard, EN485 stipulates that the time accuracy should be better than ½ % of the study duration, which the ValProbe system meets and exceeds by a factor of 30.

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How do I know when to change the battery?
Battery life is directly related to measurement conditions, with low and high temperature applications draining battery life more quickly than ambient operations. Battery life is presented as a percentage of original capacity remaining. Knowing the remaining capacity and expected study conditions, the user can easily determine whether a battery has adequate "headroom" to complete a study by simply referring to charts available in the users manual or through Customer Service. (example: If the software indicates 25% battery life remaining, and the chart lists battery life for 10 second sampling at 121°C as 1000 hours, then the logger has 250 hours of life remaining under those conditions.)

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Can I use a humidity or pressure logger to measure temperature only?
The humidity logger can be used to measure temperature only. However, be aware that the temperature range of the humidity logger is limited to 0° C to 90° C. The pressure logger cannot be used for measuring temperature.

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How do I determine when my loggers need re-calibration?
The ValProbe logger accuracy is easily determined by running a post-study verification. Loggers are designed to maintain a high level of accuracy but should be calibrated annually.

ValProbe Measurement Accuracy
range accuracy
-60° C to 0° C ± 0.2°
0° C to 140° C ± 0.1°
140° C to 250° C ± 0.2°
250° C to 360° C ± 0.5°

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Does the Logger retain measured data after it has been downloaded by the reader? If so, for how long?
Measured data is retained in memory until the logger is initialized for a subsequent study. This allows data to be reread.

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