How it Works
Digi-Sense
Loading...
20250-31
User manual
8 pgs176.11 Kb0

Digi-Sense 20250-31, 20250-30 User manual

Download
User Manual
THE STANDARD IN PRECISION MEASUREMENT
Thermohygrometer Indicator
with NIST-Traceable Calibration
Model 20250-30
www.GlobalTestSupply.com
Introduction
The Digi-Sense Thermohygrometer Indicator (Model 20250-30) is designed for indoor applications, and displays temperature, humidity, and time. Advanced features include °C/°F unit selection, Max/Min reading for temperature and humidity, environmental comfort indicators, and clock with alarm and date. The instrument is fully tested and calibrated to NIST-traceable standards. Careful use of this meter 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. Indicator
2. One AAA (1.5 V) battery, installed
3. C-clip for mounting
4. User manual
5. NIST-traceable calibration report with data
2
www.GlobalTestSupply.com
Key Features
• User-selectable °C or °F units
• Built-in sensor for indoor temperature and humidity measurement
• Max/Min temperature and humidity displays
• Environmental symbols displayed: COMFORT (comfortable), WET (high humidity), DRY (low humidity)
• Clock with alarm and date
Meter Description
1. LCD (three readouts)
2. MODE button
3. ADJ adjustment
button
4. MEMO memory
button
5. °C/°F button
(on back of unit)
6. RESET button
(on back of unit)
1
2
3
6
5
4
3
www.GlobalTestSupply.com
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. The screen is divided into three parts:
a. Section one displays time, date, and alarm
b. Section two displays temperature readings
(in either °C or °F)
c. Section three displays relative humidity % and
comfort indicator symbols
View Current Time and Date
1. Press the ADJ button to toggle between viewing
time and date.
View Max/Min Temperature and Humidity
1. Press the MEMO button to toggle between
Current/Max/Min/Current.
2. Press the MEMO button for longer than two seconds to clear the Max/Min memory.
4
www.GlobalTestSupply.com
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 shows the
3. Any temperature and relative humidity below 50% RH shows
Setting Clock and Date
1. Press MODE button to make sure you are in the time mode and not alarm mode. Once in time mode, press and hold the MODE button for three seconds to activate.
2. The minutes will start to blink; use the ADJ button to
increase value (see Fig. 1).
3. Press MODE button to advance to hours and use the ADJ button to change to desired setting.
4. Press MODE button to advance to 12- or 24-hour mode and use the ADJ button to change value (see Fig. 2).
5. Press MODE button to advance to month and use the ADJ button to change to desired setting (see Fig. 3).
6. Press MODE button to advance to date and use the ADJ button to change to desired setting (see Fig. 3).
WET symbol for high humidity.
DRY symbol for low humidity.
Fig. 1 Fig. 2 Fig. 3
www.GlobalTestSupply.com
5
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 alarm mode, press and hold the MODE button for three seconds to activate.
2. The minutes will start to blink; use
the ADJ button to change to desired setting (see Fig. 4).
3. Press the MODE button to advance
to hours and use the ADJ button to change to desired setting.
Activating the Alarm
1. Press the MODE button to advance to turning the alarm on/off hours and use the ADJ button to change the value (see Fig. 5).
a.
symbol indicates alarm is
active in chime mode.
b.
symbol indicates the alarm
is active in sound mode.
2. Press the MODE button to exit.
Fig. 4
Fig. 5
Changing Unit of Measure
1. Temperature unit displayed can be changed from °C to °F
by pressing the °C/°F button on the back of the unit.
Reset Button
1. Press and hold RESET button on the back of the unit to clear all information and default to the factory settings.
6
www.GlobalTestSupply.com
Specifications
Range
Humidity 10 to 90% RH
Temperature 32 to 120°F (0 to 50°C)
Resolution
Humidity 1%
Temperature 0.1°F/C
Accuracy
Humidity ±5% (40% RH ~ 80% RH), ±8% remaining range
Temperature ±1.8°F (1°C) 32 to 120°F (0 to 50°C)
Display LCD
Auto power-off Unit shuts off automatically after six minutes
Weight 3 oz (85 g)
Dimensions (L x W x H) 4
Power One AAA battery
to preserve battery life
1
⁄4" x 21⁄4"x 5⁄16" (10.8 x 5.7 x 0.8 cm)
Maintenance, Recalibration, and Repair
Cleaning and Storage
• Meter should be cleaned with a damp cloth and mild deter­gent when necessary. Do not use solvents or abrasives.
• Store meter in an area with moderate temperature and humidity.
Battery Replacement
If the battery power is insufficient, open the battery cover on the back of the unit and replace the AAA battery. Close the cover securely.
7
www.GlobalTestSupply.com
Maintenance, Recalibration, and Repair (cont.)
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. To schedule your recalibration, please contact InnoCal, an ISO 17025 calibration laboratory accredited by A2LA.
www.GlobalTestSupply.com
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use