ROTRONIC HF62 - Manual (Page 3)

E-M-HF62-V1_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroFlex HF62 Humidity Temperature
Transmitters: User Guide
Document title
Page 3 of 27
© 2008; Rotronic AG E-M-HF62-V1_11
Applicability:
This manual applies to all instruments of the HF62 series with firmware version 1.x, where 1.x can be 1.0, 1.1,
etc. Changes to the last digit of the version number reflect minor firmware changes that do not affect the
manner in which the instrument should be operated.
1 Overview
The HF62 series are 2-wire transmitters designed for fixed installation in industrial applications. The HF62
features two fully independent 2-wire, loop powered measuring circuits placed in a single enclosure (2 x 4…20
mA current signal). One of the circuits corresponds to relative humidity or to the dew or frost point. The other
circuit corresponds to temperature. As an option, the HF62 is available with a 4-wire Pt 100 RTD directly
connected to a terminal block. In this case, the electronics of the HF62 consist of just one circuit
corresponding to humidity.
Depending on the model, the HF62 can measure environments within the range of 0 to 100 %RH and -100 to
150
C (-148 to 302F). The electronics operating range is limited to -40…60 °C (-10…60°C with the optional
LC display).
The HF62 features well proven sensors and a robust housing. Digital signal processing ensures consistent
product performance and also facilitates the task of field maintenance with features such as potentiometer
free – digital calibration.
Based on the ROTRONIC AirChip 3000 digital technology the HF6 offers the following functions:
 User configurable settings
 Calculation of the dew or frost point
 Humidity temperature calibration and adjustment
 Simulator mode
 Automatic humidity sensor test and drift compensation
 Sensor failure mode
 Data recording
The ability for the user to easily update the AirChip 3000 firmware means that the HF62 transmitter can be
kept up-to-date regarding any future functionality improvement.