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Summary of Contents for Digi-Sense 20250-21
- Page 1 User Manual Professional Thermohygrometer with NIST-Traceable Calibration Model 20250-21 THE STANDARD IN PRECISION MEASUREMENT...
- Page 2 Introduction The Digi-Sense Professional Thermohygrometer (Model 20250-21) offers fast response and high accuracy. This heavy-duty meter measures humidity (relative and absolute), temperature, plus it calculates dew point and wet bulb. Advanced features include data Hold, Min/Max readings, and automatic power-off. The instrument is fully tested and calibrated to NIST-traceable standards.
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Page 3: Meter Description
Meter Description 1. Humidity/temperature sensor 2. LCD Backlight button 4. WBT/DP/°C/°F button (wet bulb, dew point, temperature units) 5. MAX/MIN button Power on/off button 7. MODE button (%RH, g/m , gr/ft 8. HOLD button... -
Page 4: Display Layout
Display Layout 1. Relative humidity unit 2. Absolute humidity unit (grams per cubic meters) 3. Absolute humidity (grains per cubic feet) 4. Humidity displayed reading 5. °C temperature unit 6. °F temperature unit 7. Dew point icon 8. Wet bulb icon 9. -
Page 5: Setup And Operation
Setup and Operation Power Press the Power on/off button to turn unit on. Taking Measurements 1. Hold the probe in the area to be tested. Allow adequate time for read- ings to stabilize. 2. Press the MODE button to toggle between humidity measuring units (shown on top display): %RH, g/m or gr/ft... - Page 6 Setup and Operation (continued) Dew Point Measurements 1. To select the Dew Point measurement, press the WBT/DP/°C/°F button until the DP (°C) or DP (°F) icon appears in the lower right. 2. Dew Point temperature is now shown in lower display. Wet Bulb Measurements 1.
- Page 7 Viewing the Min and Max Readings The MIN/MAX mode allows the user to view only the lowest (MIN) or highest (MAX) reading. 1. Press MAX/MIN button once and the MIN icon appears on bottom of screen. The LCD is now displaying the minimum reading of the selected parameter in the display.
- Page 8 Setup and Operation (continued) LCD Backlight Press Backlight button to turn on the backlight. Press again to turn off the backlight. Automatic Power-Off To conserve battery life, the meter automatically turns off after 10 minutes (indicated by the icon on the screen). To disable this feature: 1.
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Page 9: Specifications
Specifications Range Humidity 0 to 100% RH Absolute humidity 0 to 500 g/m (calculated) 0 to 218.5 gr/ft Temperature –22 to 212°F (–30 to 100°C) Dew point –22 to 212°F (–30 to 100°C) (calculated) Wet bulb 32 to 176°F (0 to 80°C) (calculated) Resolution Humidity... - Page 10 Specifications (continued) Display Dual LCD Response time <15 sec (90% of final value in moving air) Sensors Humidity: precision capacitance; Temperature: thermistor Auto power-off Unit shuts off automatically after 10 minutes to preserve battery life Operating 32 to 122°F (0 to 50°C) temperature Operating humidity <80% RH, noncondensing...
- Page 11 9 V bat- tery. Ensure that the compartment cover is securely closed when finished. It is recommended that Digi-Sense products are calibrated annually to ensure proper function and accurate measure- ments; however, your quality system or regulatory body may require more frequent calibrations.
- Page 12 For Product and Ordering Information, Contact: sales@novatech-usa.com www.novatech-usa.com Tel: (866) 433-6682 Fax: (866) 433-6684 Tel: (281) 359-8538 Fax: (281) 359-0084 1065DGMAN_20250-21 Rev.1 Manual Part No. 00100-71...
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