TRH21
4Pages

Catalog excerpts

PASSIVE RELATIVE HUMIDITY PROBE WITH 4... 20 mA OUTPUTS ASCON TECNOLOGIC S.r.l. Viale Indipendenza 56, 27029 - VIGEVANO (PV) ITALY Tel.: +39 0381 69871 - Fax: +39 0381 698730 http:\\www.ascontecnologic.com info@ascontecnologic.com General description TRH21 is a pasive (current loop) relative humidity probe with 4... 20 mA normalized current output signals. Probe description Connection terminals (inside the box) PREFACE This manual contains the information necessary for the product to be installed correctly and also instructions for its maintenance and use; we therefore recommend that the utmost attention is paid to the following instructions and to save it. This document is the exclusive property of Ascon Tecnologic S.r.l. which forbids any reproduction and divulgation, even partially, of the document, unless expressly authorized. Ascon Tecnologic S.r.l. reserves the right to make any formal or functional changes at any moment and without any notice. Ascon Tecnologic S.r.l. and its legal representatives do not assume any responsibility for any damage to people, things or animals deriving from violation, wrong or improper use or in any case not in compliance with the instrument features. Whenever a failure or a malfunction of the device may cause dangerous situations for persons, thing or animals, please remember that the plant has to be equipped with additional electromechanical devices which will guarantee safety. Relative Humidity sensor protective cap The device has been designed as a measuring transducer. Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. The installer must ensure that the EMC rules are respected, also after the instrument installation, if necessary using proper filters. Ascon Tecnologic - TRH21 - OPERATING INSTRUCTIONS - PAG. 1

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3.1 Mechanical mounting The device, in an 80 x 80 mm plastic container, is designed for wall mounting using screws passing through the slotted holes on the case. - Install the instrument as far as possible from electromagnetic sources as motors, power relay, relays, electrovalves, etc.; - Avoid to place the probe into places where are present corrosive and polluting gases and to do so that the probe are installed in a ventilated position; - The signal cables of the device must be routed separately from the power cables. Should be necessary to remove the protective cap, do /!\ not cause any...

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Measurements errors Reading errors can occur if settling time is too short, or be caused by steam, sprayed water, air drafts, direct exposure to sunlight, or presence of condensation on the sensor. To obtain accurate measurements the sensor should be left to settle in the existing atmosphere for some time. To reduce the possibility of condensation on the humidity sensor place the probe in ventilated position and where there is not a quick and elevation variation of temperature (from cold to warm). It is recommended to clean the box only with a cloth welted with water or with a detergent...

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