Manual
Table Of Contents
- Quick Start
- Overview
- Connecting the Logger to Your PC
- Setting Up the Logger To Record Data
- Custom Interval Setup
- Alarm Setup
- Using the Software to Check Logger Status
- Ending the Logging Session
- Powering Down the Logger
- Loading Logger Data
- Automatic Data Retrieval
- Working With the Data Graph
- Using the Zoom Feature
- Data Listing Window
- Data Summary and Statistics
- Using the Data Filter
- Hiding or Viewing Channels
- Exporting Logger Data
- Printing the Logger Data
- Calibrating the Logger
- Setting the Calibration Password
- Setting the Logger Real Time Clock
- Data Security
- Specifications
- MTL-30 Temperature Humidity Logger
- MTL-30 Logger Status LED
- Replacing the MTL-30 Battery
- MTL-30 Specifications
- MTL-20 Temperature Logger
- MTL-20 Logger Status LED
- Replacing the MTL-20 Battery
- MTL-20 Specifications
- GDL Temperature Humidity Logger with Display
- Turning the GDL On and Off
- GDL Sample Screen
- The GDL Summary Screen
- GDL Graph Screen
- GDL Buttons
- Replacing the GDL Battery
- GDL Specifications
- GDL-T Four Temperature Logger with Display
- Turning the GDL-T On and Off
- GDL-T Sample Screen
- GDL-T Difference Screen
- GDL-T Summary Screen
- GDL-T Graph Screen
- GDL-T Buttons
- Replacing the GDL-T Battery
- GDL-T Specifications
- MTL-LCD Loggers with Display
- MTL-LCD Display and Button
- Replacing the MTL-LCD Battery
- MTL-20-LCD Specifications
- MTL-30-LCD Specifications

DwyerLog User’s Guide Version 1.4x 33/33
MTL-20-LCD Specifications
Display
Displays real time temperature. Displays logging status and alarm status.
Sample Point Capacity
43,344 Temperature samples..
Sample Rate
1 second to 18 hours.
Alarms
Visual over and under temperature alarm indicator.
Operating Temperature
-4°F to 140°F (-20°C to 60°C)
Storage Temperature
-4°F to 160°F (-20°C to 70°C)
Temperature Accuracy
+/-1°F (0.5°C)
Temperature Resolution
0.1°F or 0.1°C
Calibration
Password protected single point offset calibration is available through software.
Time Accuracy
+/-100ppm @75°F
Dimensions
3’’ x 1.6" x 0.6’’ (7.6cm x 4.0cm x 1.5cm)
Weight
1.0 oz (28g)
Power Source
3V CR2032 Lithium coin cell battery (Included)
Battery Life
3 Years. The logger automatically turns itself OFF after 1 hour, when not logging.
Turn On by pressing the button.
MTL-30-LCD Specifications
Display
Displays real time temperature and relative humidity. Displays logging status and
alarm status.
Sample Point Capacity
43,344 points for temperature only. 21,672 points for temperature, humidity and
dew point.
Alarms
Visual over and under alarm indicator for temperature and humidity
Sample Rate
1 second to 18 hours.
Operating Temperature
-4°F to 140°F (-20°C to 60°C)
Storage Temperature
-4°F to 160°F (-20°C to 70°C)
Temperature Accuracy
+/-1°F (0.5°C)
Temperature Resolution
0.1°F or 0.1°C
Relative Humidity Range
0% to 99%RH, non condensing.
Relative Humidity
Accuracy
+/- 2%RH, from 10% to 90% RH
Relative Humidity
Resolution
0.1 %RH
Calibration
Password protected single point offset calibration is available through software for
temperature and relative humidity.
Time Accuracy
+/-100ppm @ 75°F
Dimensions
3’’ x 1.6" x 0.6’’ (7.6cm x 4.0cm x 1.5cm)
Weight
1.0 oz (28g)
Power Source
3V CR2032 Lithium coin cell battery (Included)
Battery Life
3 Years. The logger automatically turns itself OFF after 1 hour, when not logging.
Turn On by pressing the button.