ROTRONIC XB OEM - Manual (Page 3)

E-M-XB-V1_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
XB Humidity Temperature Transmitter
User Guide
Document title
Page 3 of 27
© 2008; Rotronic AG E-M-XB-V1_10
Applicability:
This manual applies to all instruments of the XB transmitter 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 XB transmitter measures temperature, relative humidity and the dew or frost point and is designed for
OEM applications. The XB transmitter consists of a probe that is hard wired to a small open board with a 2 m /
6.5 ft cable. Humidity is measured with the ROTRONIC HYGROMER
 IN-1 capacitive humidity sensor. This
sensor offers fast response and exceptional stability, even in high humidity environments. Sensor durability
has proven to be excellent in a wide range of applications.
The XB transmitter is suitable for measuring humidity within the range of 0 to 100 %RH and temperature
within the range of -100 to 200 °C (-100 to 392 °F) at the probe. At temperature values above 80°C, the
maximum humidity to which the humidity sensor can be exposed is gradually limited. Both the probe and
sensor survive exposure to temperature within the range of -100 to 200
C / -148 to 392F.
The probe of the XB transmitter is equipped with a Pt100 RTD temperature sensor. Data from this sensor is
used to compensate the effect of temperature on the humidity sensor so as to maintain accurate humidity
measurements over a wide range of temperature values. Depending on the model (see ordering codes), data
from the RTD is also used to provide a linear temperature output signal
As an option, the probe of the XB transmitter can be equipped with an additional Pt100 RTD temperature
sensor. In that case, the XB transmitter is equipped with a 4-position terminal block for direct connection to the
temperature sensor.
Two basic types of electronic circuit are available: XB2: 2-wire, loop powered (4…20 mA current signal) and
XB3: 3-wire (voltage or current signal). The analog output signal is linear and can be transmitted over a length
of cable to a remote display, recorder, controller or data processing unit. Digital signal processing within the
XB transmitter ensures consistent product performance and also facilitates the task of field maintenance:
Based on the ROTRONIC AirChip 3000 digital technology, the XB transmitter series offers the following user
functions which can only be accessed with the HW4 software:
 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 instruments of the XB series
can be kept up-to-date regarding any future functionality improvement.