Data Logging
Function Overview:
- Relative humidity values are recorded with a resolution of 0.1%RH
- Temperature values are recorded with a resolution of 0.05¢ªC / 0.09¢ªF
- Memory capacity: 20,000 single values or value pairs
- Adjustable log interval: from 5 seconds to 1 hour, in increments of 5 seconds
- Two data recording modes: Loop and Start-Stop
Any recorded data present in the data logger memory is automatically erased whenever a new recording session is started.
Recording Models:
- Loop: when the memory is full the logger dumps the oldest data sample and keeps recording. The memory retains the most recent data.
- Start-Stop: the logger stops recording data as soon as the memory is full
Data recording can be stopped at any time by pressing on the function key (long key press) or with the ROTRONIC HW4 software.
Recorded Parameters:
Depending on the model, the data logger records either temperature only or relative humidity and temperature. Calculated parameters such as the dew point are not recorded by the HL20. The HW4 software (version 3.0 or higher) can be used to add a calculated parameter to the recorded data after downloading to the PC.
Date and time:
The HL20 / HL21 internal real time clock is used to associate a date and time stamp with each data record. When data recording is either started or stopped using the ROTRONIC HW4 software, the real time clock is automatically synchronized with the PC clock.
Log file format(data download with HW4):
The recorded data can be saved as a file to a PC using either HW4 or another communications software. When using HW4, the file can be either formatted as a text file (extension TXT) or as an encrypted binary file (extension LOG). The LOG file format can only be read with HW4 and complies with the FDA / GAMP rules regarding electronic records and electronic signatures.
