DTH31 1-800-547-5740 • Fax: (503) 643-6322 www.ueitest.com • email: info@ueitest.
Introduction 4. ∆T/WB: Switch between ∆T, WB and T2. T2 (∆T=T2-DP, T2=External Temp.) The DTH31 Digital Psychrometer is an advanced handheld humidity and temperature meter. Its triple display shows three parameter readings simultaneously and includes a second temperature probe for external measurements. It has everything you need to charge an air-conditioning system and determine heating, cooling, and ventilation needs.
Operating Instructions Data Hold Function 1. Press “HOLD” button until “HLD” appears in display. • The current reading is now held and will not change until the HOLD function is cancelled (Fig 3) 2. Press “HOLD” button again to cancel. • Hold function can be used for humidity, dew-point, dry bulb/T1, Ext. Temp./T2, wet bulb and temp. differential (Fig 1) WARNING! Be sure to open the sensor protection cap before taking measurements.
MIN/MAX Function 1. Press “ “ button until “MIN” appears in display (Fig 6). Display is now showing minimum humidity and temperature reading. 2. Press “ “ button again until “MAX”appears in display (Fig 7). Display is now showing maximum recorded humidity and temperature readings. “ button until “MIN” or “MAX” disappear from display 3. Press “ to return to current readings. (Fig 10) 4. Press “ “ button for more than 2 seconds to clear current reading from memory.
DTH31 Digital Psychrometer Limited Warranty The DTH31 is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase. If within the warranty period your instrument should become inoperative from such defects, the unit will be repaired or replaced at UEi’s option. This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration, tampering, accident, misuse, abuse, neglect or improper maintenance.