User Manual
Temperature/RH Touch-Screen Monitor
with NIST-Traceable Calibration
Model 20250-40
THE STANDARD IN PRECISION MEASUREMENT
5 Commo
Woburn, MA 01801
Phone 781-665-1400
Toll Free 1-800-517-8431
nwealth Ave
Introduction
The Digi-Sense Temperature/RH Touch-Screen Monitor (Model 20250-40)
measures and logs temperature, relative humidity, and dew point readings in
real time and displays them in digital and graphic forms. Intuitive touch-screen
menu allows you to program data collection parameters and adjust the graphic
display for the best presentation of the data. Software is pre-installed so no
downloading is required; just turn the instrument on and it is ready to run.
The 8 GB of memory means you have nearly unlimited data collection capability
which is easily downloaded to a computer in CSV format for simple integration
with standard applications. The instrument is fully tested and calibrated to
NIST-traceable standards. Careful use of this unit will provide years of reliable
service.
Unpacking
Check individual parts against the list of items below. If anything is missing or
damaged, please contact your instrument supplier immediately.
1. Touch-screen monitor tablet
2. Temperature/RH sensor
3. Sensor extension cable, 6-ft (1.8-m) long
4. Wall-mounting bracket
5. USB cable
6. Power supply
7. NIST-traceable calibration report with data
2
Description
1. Touch-screen monitor tablet
2. Temperature/RH sensor
3. Built-in desk stand and wall-mounting bracket
4. Slot for short probe and the probe of extension cord
5. On/Off button
6. USB interface for charging power and reviewing data via PC
3
Key Features
• Graphical and digital touch-screen display interface
• Multifunction content-rich interactive menu
• Large high-resolution color LCD, resolution 1024 x 600
• Touch-screen operation, zoom in/out curve
• User-adjustable high and low alarms, sampling rates, and data points
• Live and future recording options
• Selectable temperature units (°F/°C)
•
Max/Min readings
• Date and time setting
• Adjustable brightness and screen saver timing
• Export the recording data to computer
• Built-in desktop stand and wall-mounting bracket options
Applications
• Food processing
• Environmental monitoring
• Health care
• Storage and warehouse monitoring
• Ofce and workspace monitoring
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Setup and Operation
Caution: The sensor or sensor extension cable should be connected to the
instrument before turning it on to prevent data corruption.
Main Interface
1. Memory progress bar: “Used” indicating used memory,
“Free” indicating memory remaining
2. System real time and date
3. Numerical scale of the temperature, humidity, and dew point
4. Date and time scale
5. Temperature, humidity, and dew point trend curves
6. “Live” showing real-time mode
7. Date and time of “Live” and “History” mode
8. Value of real-time temperature, humidity, and dew point
9. Max/Min settings
10. History mode selection
11. Live mode selection
12. Best Fit selection to provide the optimal view of the data curves
13. Menu selection
14. Parameter curve display on or off
15. Battery capacity
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