Specification
KEY STRENGTHS:
872-3 Digital Psychrometer is designed to take very accurate quick readings for all areas where accurate relative humidity, temperature, dew point, and wet bulb temperatures must be taken. Equipped with an big LCD screen that can display temperature and humidity simultaneously. It uses rotronic capacitor humidity sensor for the accurate reading and condensation will not affect meters' accuracy. This thermo-hygrometer has a reliable built-in microprocessor circuitry and Dew Point & Wet bulb is calculated in seconds. It also has advance functional features such as easy to self-calibrate by salt bottle, replaceable remote probe, maximum/ minimum and reset function, hold function, backlight function, switchable ° C & F, tripod mountable, auto power off that can be disable anytime, low battery indicator and battery life that can last 50 to 100 hours.
BUILT FOR RELIABILITY - It quickly and accurately measure and easily reach the inside of the pipe tubing, even in air ducts, corners and small or cramped spaces. The practice of manually swinging a wet bulb hygrometer for several minutes to measure dew point has been completely done away with using the digital psychrometer.
A must device for HVAC engineers' use. No more whirling and referring to a chart! This professional meter, with proper care, will provide years of safe reliable service.
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Features:
* Simultaneous display of humidity and temperature
* Switchable ° F/ ° C temperature units with 0.1° C ( 0.1° F) resolution
* Get Wet bulb temperature reading in few seconds
* Backlight function for use in the dark areas
* Remote and detachable probe for extending measurement and easy to reach inside of the pipe tubing
* Read Min & Max from the meter powered on
* Auto power off that can be disable for saving power consumption
* Using Rotronic capacitor humidity sensor for the accurate reading, condensation will not affect meters' accuracy
* Easy to self-calibration by using salt solution to maintain the accuracy of the meter
* With reset function to clear Max/ Min data
* With error indicators for calibration, relative humidity circuit & temperature circuit
* Low cost, fast response, high accuracy hand held model
* Battery life: 50 hours - use backlight ( automatically turns off in about 10sec)
* * * * * * * * * 100 hours - if backlight will be used
* Approved by strict quality and safety standards
* Undoubtedly durable and very reliable
Specifications:
* Temperature Range : -10 ~ 60° C ( -4 ~ 140° F)
* RH% range : 0~ 100% RH
* Wet bulb range : -13.4 ~ 59.9° C ( 7.88 ~ 139.8° F)
* Dew point range : -68 ~ 49.9° C ( -90.4 ~ 122° F)
* Humidity
o Accuracy : ± 3% at 25° C
o Resolution : 0.1%
* Temperature
o Accuracy : ± 1° F ( 0.6° C)
o Resolution : 0.1° C / 0.1° F
* Response time : 60 seconds typical
* Battery : 4 pcs AAA batteries
* Dimension : 175( H) x70( W) x33mm( T)
Accessories included:
* FREE 1.5V AAA Battery x 4
* FREE Hard Carrying Case
* FREE Remote & Detachable Probe
* Operation manual
Warranty: 2 years warranty
All our products are manufactured under the strict quality control guidelines established by EN ISO9001-2000 Standards
Very Easy & Simple Operating Information:
1. Power the meter by pressing the Power button. Connect the probe to the 6-pin port located at on the top of the meter. Start measuring by placing the probe in the area you want to measure.
2. Getting Air Temperature/ Dew Point/ Wet Bulb. When the text DP or WB do not appear on the screen, the meter is measuring the Air Temperature. To measure Dew Point or Wet Bulb, press " DP/ WB" button to until the text DP ( for Dew Point) or WB ( for Wet Bulb) appears on screen.
3. Hold data. Press the " HOLD" button to freeze the current reading. Press " HOLD" again to unfreeze the reading and go back to normal mode.
4. Switching ° C & ° F. Press " C/ F" button until the temperature unit desired appears.
5. Getting & Re-setting Min/ Max Value. Momentarily press " RST MIN/ MAX" button to switch from Min value & Max value. Press " RST MIN/ MAX" button for about 1sec to reset the Min & Max values.
Calibration. To get high accuracy do the calibration in a 23± 2° C and steady airflow room.
1. Turn the meter on and place the probe into a 32.8% salt bottle or in HR33 calibration solution ( HR33 calibration solution is not included) .
2. Press power button and F/ C button simultaneously for more than 1sec. When the calibration solution value stops flashing on screen, the calibration data is saved.
3. Then, place the probe into a 75.3% salt bottle or in HR75 calibration solution ( HR75 calibration solution is not included) .
4. When the calibration solution value stops flashing on screen, the calibration data is saved as well as the whole self-calibration is finished.
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