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Summary of Contents for Digi-Sense 20250-31
- Page 1 User Manual Thermohygrometer Indicator with External Probe with NIST-Traceable Calibration Model 20250-31 THE STANDARD IN PRECISION MEASUREMENT...
- Page 2 Introduction The Digi-Sense Thermohygrometer Indicator (Model 20250-31) is designed for both indoor and outdoor applications, and displays temperature, humidity, and time. Advanced features of this thermohygrometer include °F/°C unit selection, built-in sensor for indoor temperature, external probe for outdoor temperature, Max/Min reading for temperature and humidity, environmental comfort indicator, and clock with alarm and date.
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Page 3: Meter Description
Key Features • User-selectable °C or °F units • Built-in sensor for indoor temperature • External probe for remote temperature and humidity measurement • Max/Min reading for temperature and humidity • Environmental symbols displayed: COMFORT (comfortable), WET (high humidity), DRY (low humidity) •... -
Page 4: Setup And Operation
Setup and Operation Button Functions 1. MODE switches from clock to alarm function 2. ADJ sets clock, alarm, and date 3. MEMO displays Max/Min temperature and humidity readings 4. °C/°F changes temperature display unit of measure 5. RESET clears all settings and memory data Display 1. - Page 5 Environmental Comfort Display Symbols 1. Temperature at 68 to 78.8°F (20 to 26°C) and relative humidity between 50% and 70% RH will show COMFORT symbol. 2. Any temperature and relative humidity above 70% RH WET symbol for high humidity. shows the 3.
- Page 6 Setup and Operation (continued) Setting Alarm 1. Press MODE button to make sure you are in the alarm mode and not the time mode. Once in the alarm mode, press and hold the MODE button for three seconds to activate. 2.
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Page 7: Specifications
Specifications Range Humidity 10 to 90% RH Temperature –58 to 158°F (–50 to 70°C) (external sensor) Temperature 32 to 120°F (0 to 50°C) (internal sensor) Resolution Humidity Temperature 0.1°F/C Accuracy Humidity ±5% (40% RH ~ 80% RH), ±8% for remaining ±5°F (2.5°C) from –58 to –22°F (–50 to –30°C), ±3°F (1.5°C) from –22 to 32°F (–30 to 0°C), ±1.8°F (1°C) from 32 to 104°F (0 to 40°C),... - Page 8 If battery power is insufficient, open the battery cover on the back of the unit and replace the AAA battery. Close cover securely. It is recommended that Digi-Sense products are calibrated annually to ensure proper function and accurate measurements; however, your quality system or regulatory body may require more frequent calibrations.
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