Dwyer GDL-T - Manual (Page 19)

DwyerLog User’s Guide Version 1.4x 19/33
Specifications
Common logger specifications are shown below. For specific logger specification, see the logger documentation.
PC Interface USB port. USB cable is included
Sampling Interval User selectable from 1 second to 18 hours, in 1 second increments.
Data Security Unique factory set logger ID. Recording session counter. Password protected calibration.
Operating System
Compatibility Windows XP, Windows Vista and Windows 7. Compatible with both 32 bit and 64 bit
systems.
Minimum System
Requirements 5MB of free disk space, 800 x 600 screen resolution, 1 free USB port.
Recording Start On button press, immediate after setup, or at a user specified date and time.
Recording Mode Stop on memory full, or continuous recording with memory rollover
Real Time Status Visual indication through the status LED. Software real time status.
User Calibration Password protected calibration for each channel.
User Information Up to 30 characters
Logger Channels User selectable. Disabling channels increases the storage capacity of the other channels.
Units US and Metric
Data Format Exportable to text or Excel files.
MTL-30 Temperature Humidity Logger
The MTL-30 is a self-contained, precision instrument for recording the temperature and relative humidity of the
surrounding environment. The MTL-30 can store up to 43,344 temperature samples, or up to 21,672 of both
temperature and relative humidity samples. In addition to Temperature and Humidity, the DwyerLog software
computes and displays the Dew Point Temperature.
The MTL-30 logger temperature and relative humidity sensors are open to the air. It is therefore important to ensure
that water does not get into the unit. This is especially important in high humidity situations (90% RH and above)
where water may condense inside the logger, causing damage to the internal electronics.
Warning: Care must be taken to ensure that the logger is not operating under condensing conditions. This
means that the dew point temperature must be below the ambient temperature. Condensation will damage the
humidity sensor and the logger electronics.
MTL-30 Logger Status LED
Pressing the Start/Check button makes the LED flash a series of flashes to indicate the logger status. The table
below shows the different logger states that the status light can show.
Status Light Logger State
Flashed Green one time Logging is not in progress. Data in memory did not exceed the alarm
thresholds.
Flashed Red one time Logging is not in progress. Data in memory exceeded one of the alarm
thresholds.
Flashed Green four times Logging is in progress. Data in memory did not exceed the alarm thresholds
Flashed Red four times Logging is in progress. Data in memory exceeded one of the alarm thresholds
Flashed Green-Red three times Delayed logging. Logging will start at the user specified time.