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
- 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
- Replacing the MTL-30 Battery
- MTL-30 Specifications
- MTL-30 Logger Status LED
- MTL-20 Temperature Logger
- Replacing the MTL-20 Battery
- MTL-20 Logger Status LED
- 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
DwyerLog User’s Guide Versin 1.2x 19/25
MTL-30 Specifications
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. Dew point
alarms are not available
Calibration
User single point offset calibration is available through software for both
temperature and humidity. Calibration is password protected.
Operating Temperature
-35°F to 160°F (-31°C to 70°C)*
Storage Temperature
-40°F to 170°F (-40°C to 77°C)
Time Accuracy
+/-100ppm @75°F
Relative Humidity Range
0% to 99%RH, non condensing.
Relative Humidity
Accuracy
+/- 2%RH, from 10% to 90% RH
Relative Humidity
Resolution
0.01%RH
Temperature Accuracy
+/-1°F (0.5°C)
Temperature Resolution
0.01°F or 0.01°C
Dimensions
3’’ x 1.6" x 0.6’’ (7.6cm x 4.0cm x 1.5cm)
Weight
1.0 oz (23g)
Power Source
3V CR2032 Lithium coin cell battery (Included)
Battery Life (average use)
6 Years
* Lithium batteries do not perform well in very low temperatures. If the logger is going to be used in temperatures
below 32°F (0°C), make sure to start with a fresh battery, and check the battery level often.
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.
MTL-20 Temperature Logger
The MTL-20 is a self-contained, precision instrument for recording the temperature of the surrounding environment.
The MTL-20 can store up to 43,344 temperature samples.