User manual VAISALA HMD70 DATASHEET

[. . . ] www. vaisala. com HMD60/70 Humidity and Temperature Transmitters for ducts in HVAC applications Features/Benefits Full 0 . . . [. . . ] The calibration can be done in seconds with a single potentiometer without disturbing the operation, resulting in great savings both in maintenance time and costs. Resistant to chemicals and dust The duct mount HMD60 and HMD70 transmitters can also be used in many industrial humidity monitoring applications, where their stability and resistance to chemicals and dust are of great value. A useful feature of these duct mount transmitters is the ability to remove the electronics without removing the unit from the duct. Technical data 60 series: 2-wire, 4 to 20 mA output Duct mount RH only RH & T T only HMD60U HMD60Y HMD60T General - 60 series Supply voltage Output signal 10 . . . 20 mA 70 series: 3-wire, variable voltage output Duct mount RH only RH & T T only HMD70U HMD70Y HMD70T General - 70 series Supply voltage range depends on the selected output signal DC AC 0 . . . 24 V WITH OPTIONAL CURRENT MODULE Relative humidity Measurement range duct mount Accuracy at +20 °C %RH 3 2 1 0 -1 -2 -3 0 10 20 30 40 50 60 70 80 90 100 %RH 0 . . . 24 V 10 mA typical 12 mA typical General Operating temperature range electronics -5 . . . 18945 HM Housing probe stainless steel electronics cast aluminum Connections screw terminals 0. 5 . . . 10528HM (must be ordered separately) Complies with EMC standard EN61326 and EN55022 Temperature dependence %RH 2. 0 -20 °C, + 1, 5 % 1. 5 1. 0 0. 5 0 -20 -10 0 10 -0. 5 -1. 0 -1. 5 -2. 0 +80 °C, + 1, 3 % 20 30 40 50 60 70 80 °C Response time at +20 °C (+68 °F), 90% response Stability Sensor 15 s (with membrane filter) + 2 %RH / 2 years HUMICAP® 180 Temperature (Y and T models) Linearity Sensor Measurement range Accuracy ·C 0. 8 0. 6 0. 4 0. 2 0 -0. 2 -0. 4 -0. 6 -0. 8 -20 -10 0 10 20 30 40 50 60 70 80 ·C better than 0. 1 °C Pt 1000 IEC 751 class B -20 . . . 176 °F) ** ** Optional temperature scales are available on request. For more information, visit www. vaisala. com or contact us at sales@vaisala. com Ref. [. . . ] All specifications -- technical included -- are subject to change without notice. [. . . ]