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 17/33
To perform the calibration:
1. Select a stable and accurate reference instrument. It is best to use a reference instrument that has at least 2
to 4 times the accuracy of the logger you are calibrating. For instance, if the accuracy of the logger
temperature channel is given as +/-1ºF, the accuracy of your reference instrument should be at least +/-
0.5ºF to +/-0.25ºF.
2. Make sure that both the logger and your reference instrument are reading the same stable source. For
temperature and humidity, it is best to place the logger and the reference sensor in a stable chamber.
3. Adjust your source to the value at which you would like to perform the calibration.
4. Wait for your reference instrument and the reading in the “Logger Reading” box to stabilize.
5. Enter the reading from your reference instrument in the “Reference Instrument” box, and hit the Calibrate!
button.
Setting the Calibration Password
To change the calibration password select Calibrate… from the Logger menu. When the Calibration Password
window is displayed, follow these steps:
• Enter the current calibration password in the “Enter Calibration Password” box. If you are setting the password
for the first time, do not enter anything in this box, since the logger is factory configured not to have a password as
a default.
• Enter the new password in the “New Password” box.