ROTRONIC XB OEM - Manual (Page 8)

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 8 of 27
© 2008; Rotronic AG E-M-XB-V1_10
The D/A converters used to generate the analog output signals feature a 16-bit resolution and exhibit a small
positive offset at the bottom of the signal range as indicated below:.
Signal type
Maximum offset at range bottom
0…1 V 3 mV
0…5 V 50 mV
0…10 V 90 mV
0…20 mA 4 µA
4…20 mA No offset
XB3
The ROTRONIC HW4 software allows changing the type of output signal to one of the following: 0…20 mA,
4…20 mA, 0…1V, 0…5V or 0…10V. Both output signals are automatically configured with the same signal
type. No calibration or adjustment is required after changing the type of output signal.
In the case of voltage output signals, load requirements apply to the external device or circuit connected to the
XB3 transmitter. These requirements are defined in the “Operation” chapter
3.5 Direct RTD option (XB2 and XB3)
The standard XB transmitter is equipped with one Pt100 RTD. When ordered with the direct RTD option, the
XB transmitter is supplied with a second Pt100 RTD installed on the probe. This additional RTD is directly
connected to a terminal block. (4-wire connection)
3.6 Service connector
The service connector (UART interface with a mini-USB type connector) allows connecting the XB transmitter
either to a PC running the ROTRONIC HW4 software or to a probe input of another instrument that is
compatible with the HygroClip 2 (HC2) probes. In both cases a service cable is required. See “Maintenance”
for the location of the service connector and for the type of service cable to be used.
 Connecting the XB transmitter to a PC is used to configure the transmitter, gain access to the transmitter
functions such as humidity and temperature adjustment, read data from the transmitter on the PC and
update the AirChip 3000 firmware.
 Connecting the XB transmitter to the probe input of another instrument is useful only when the other
instrument has its own display and keypad, and has an internal menu equivalent to the menu of the HP23
hand-held calibrator. The connection allows showing the data measured by the XB transmitter on the other
instrument display and also allows using the other instrument internal menu to do for example a humidity
and temperature adjustment of the XB transmitter.
3.7 Sensor protection (dust filter)
A dust filter is required to protect the sensors against dust particles and high air velocity. The probe of the XB
transmitter is equipped with a with a metal filter base mod. NSP-ME. The filter cartridge must be ordered
separately (see Accessories 11.5). Filter cartridge mod. SP-M15 is suitable for most applications.