Rotronic XB Instruction Manual
E-M-XB-V1_25
Document code Unit
Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
Document title
XB
Humidity Temperature Transmitter
User Guide
Instruction Manual
Page
1 of 29
Document Type
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
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Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
Document title
Instruction Manual
Page
2 of 29
Document Type
Table of contents
1
Overview ............................................................................................................................................... 3
2 Dimensional drawings ......................................................................................................................... 4
3 General description ............................................................................................................................. 5
3.1 Power supply ...................................................................................................................................... 5
3.2 Measured parameters ........................................................................................................................ 5
3.3 Calculated parameters ....................................................................................................................... 5
3.4 Analog output signals ......................................................................................................................... 6
3.5 Direct RTD option (XB2 and XB3) ...................................................................................................... 6
3.6 Service connector ............................................................................................................................... 7
3.7 Sensor protection (dust filter) ............................................................................................................. 7
User configurable settings and functions ................................................................................................... 8
3.8 Function overview .............................................................................................................................. 8
3.9 Factory default settings .................................................................................................................... 10
4 Mechanical installation ...................................................................................................................... 11
4.1 General guidelines ........................................................................................................................... 11
5 Electrical installation ......................................................................................................................... 13
5.1 General guidelines ........................................................................................................................... 13
5.2 Wiring and terminal block diagrams ................................................................................................. 14
6 Operation ............................................................................................................................................ 19
6.1 Minimum load requirements for the XB3 with voltage outputs .......................................................... 19
6.2 XB2 and XB3 transmitters (analog outputs) ..................................................................................... 19
7 Maintenance ....................................................................................................................................... 20
7.1 Service cable .................................................................................................................................... 20
7.2 Location of the service connector (mini USB type) ........................................................................... 21
7.3 Periodic calibration check ................................................................................................................. 22
7.4 Cleaning or replacing the dust filter .................................................................................................. 22
7.5 Validation of the output signals transmission ................................................................................... 22
8 Firmware updates .............................................................................................................................. 23
9 Technical data .................................................................................................................................... 24
9.1 Specifications ................................................................................................................................... 24
9.2 Dew point accuracy .......................................................................................................................... 27
10 Accessories ........................................................................................................................................ 28
11 Supporting documents ...................................................................................................................... 28
12 Document releases ............................................................................................................................ 29
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
Document code Unit
Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
Document title
Instruction Manual
Page
3 of 29
Document Type
Applicability:
This manual applies to all ins tr uments of the XB transmitter series with firmware version 3.0 or higher. Changes
to the last digit of the versi on n umber reflect minor firmware changes that do not affect the manner in w hich th e
instrument should be operated.
1 Overview
The XB transmitter measures temper ature , re lative humid ity and the dew or fr ost p oint and is designed f or 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 ex cep tiona l stabi lity, ev en in hi gh humidi ty env ironment s. Se nsor d urabilit y ha s proven
to be excellent in a wide range of applications.
The XB transmitter i s suit abl e for measuring humidity within the range of 0 to 100 %R H 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 pr obe of the XB transmitter can be equipped w ith an addi tional Pt100 RTD tempera ture 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 dis play , r e corder , co ntro ller or data processing unit. Digital signal proce ssi ng 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.
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
Board thickness:
Overall probe length: 116 / 266 mm (4.57 / 10.47”)
Cable length: 2 m (6.5 ft)
Dimensions in mm
4 x mounting hole
V+
-
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Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
Document title
2 Dimensional drawings
V
Instruction Manual
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Page
1.7 mm / 0.07”
Clearance bottom:
5 mm / 0.20”
Clearance top (component side):
15 mm / 0.60”
dia: 4.4 mm / 0.173”
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Diameter: 15 mm (0.59”)
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
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Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
Document title
Instruction Manual
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3 General description
3.1 Power supply
Depending on the circuit type, the XB transmitter requires the following power supply:
a) XB2 (2-wire, loop pow ered): 10…28 VD C - depending on the load c onnected to the output(s). T he minimum
supply voltage can be determined as follows:
V min = 10 V + (0.02 x Load*) *Load resistance in ohms.
For the maximum load of 500 Ω, the minimum supply voltage is 10 + (0.02 x 500) = 20 VDC. With both
output circuits closed, the maximum current consumption is 40 mA.
b) XB3 (3-wire w ith anal og out put s): 15 t o 40 VD C ( see not e bel ow ) or 12 to 28 VAC. With both output cir cuit s
closed, the maximum current consumpt ion is 50 mA.
Note: depending on the type of output signal, the XB3 will operate with the following minimum voltage
0…1 V outputs: 6 VDC or 5 VAC
0…5 V outputs: 10 VDC or 8 VAC
0…10 V outputs: 18 VDC or 13 VAC
0…20 mA or 4 …20 mA outputs: 6 VDC or 5 VAC with 0 Ω load
18 VDC or 13power with 500 Ω load
3.2 Measured parameters
The XB transmitter measures relative humidity with a ROTRONIC Hygromer® IN1 capacitive sensor and
temperature with a Pt100 RTD.
3.3 Calculated parameters
Using the ROTRONIC HW4 software, the XB transmitter can be configured by the user to calculate either the
dew point or the frost point.
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
Signal type
Maximum offset at range bottom
0…1 V
10 mV
0…5 V
50 mV
0…10 V
100 mV
0…20 mA
0.2 mA
4…20 mA
No offset
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XB Humidity Temperature Transmitter
User Guide
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Instruction Manual
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3.4 Analog output signals
XB2 and XB3
With the ROTRONIC HW4 software any of the two analog output signals can be made to correspond to one of
the following:
• Relative humidity
• Temperature
• Dew or frost point
Any output can also be disabled.
The scale of each analog output can be set within the numerical limits of -999.99 and 9999.99.
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:.
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 si gnals are automati cally c onfigured w ith the same sig nal 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 tr ansmitt er is equip ped w ith on e Pt 100 R TD. When ordered with t he dire ct R TD opt ion, the X B
transmitter is supplied w ith a second Pt100 RT D installed on the probe. T his additional RT D is directly connecte d
to a terminal block. (4-wire connection)
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
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Rotronic AG
Bassersdorf, Switzerland
XB Humidity Temperature Transmitter
User Guide
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Instruction Manual
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3.6 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a miniUSB type connector. This allows connecting the XB transmitter ei ther to a PC ru nning the ROTRO NIC HW4
software or to a probe input of another instru me nt that is compatible w ith the HygroClip 2 (HC 2) pr ob es. In bot h
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 humidi ty and temperatur e 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.
© 2015; Rotronic AG E-M-XB-V1_25
E-M-XB-V1_25
AirChip 3000 Functions
Description
► Humidity / temperature adjustment
o 1-point or multi-point humidity calibrat ion or adjus tme nt
o Generate calibration and adjustment protocols
► Automatic humidity sensor test
Tests the humidity sensor for drift caused by contaminants
for drift) or Bad (defective)
► Data recording
The data recording function differs from a true data logging
HW4 software, time stamped and viewed
AirChip 3000 Functions
Description
► Simulator mode
Used to make the XB transmitter generate fixed values for
configured, enabled or disabled
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XB Humidity Temperature Transmitter
User Guide
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Instruction Manual
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User configurable set ti ngs a nd f unctions
The XB transmitter ship s conf i gured as spe cif ied on the cust omer order . The analog outputs can be used just
as with any conventional humidity and temperature transmitter and most users will never need to use the XB
transmitter configurable settings and functions.
Making use of the XB transmitter configurable settings and functions is entirely up to the user and the
appropriate settings depend on the user application. We have provided below a short description of the XB
transmitter functions and also indicated the factory default settings.
3.8 Function overview
MEASUREMENT ACCURACY AND RELIABILITY
o 1-point or 2-point temperature calibrat ion or adjus tme nt
o Generate a time stamp for calibrations and adjust ment s
o Retain and view last adjustment date and adjustment
values
and optional drift compensation
MEASUREMENT LOOP VALIDATION
and can be used to automatically apply a correction. The test
is automatically carried out at regular intervals of time. Can
be configured, enabled, or disabled
The humidity sensor status can be verified either with the
HW4 software and is shown as Good, SQ-tuned (corrected
function in the sense that the AirChip 3000 does not time
stamp the data. This data recording function can be used to
investigate events such as a sensor malfunction as well as to
retrieve data that would otherwise be lost
o Start or stop data recording - up to 2000 value pairs
(%RH and temperature). Starting a recording session
erases all previously recorded data
o The recording mode and log interval can be specified
o When the device is powered off, the recording session is
paused but not ended As long as the recording session
has not been ended, the device automatically resumes
recording data when powered up again
o The recorded data can be downloaded to a PC with the
© 2015; Rotronic AG E-M-XB-V1_25
the humidity, temperature and calculated parameter. Can be
E-M-XB-V1_25
AirChip 3000 Functions
Description
► Device write protection
Used to protect the XB transmitter with a password to
configured, enabled or disabled
AirChip 3000 Functions
Description
► Limit humidity output to 100 %RH
Used to prevent the humidity signal from exceeding
enabled or disabled
► Out-of-limit value alarm
Used to specify the normal range for humidity, temperature
be seen on the optional display
► Bad sensor alarm
Built-in function. Cannot be disabled
which can be also be seen on the optional display
► Fail safe mode
Used to specify a "safe" fixed value for humidity and for
configured, enabled or disabled
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Rotronic AG
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XB Humidity Temperature Transmitter
User Guide
Document title
DEVICE SAFEGUARDS
prevent unauthorized digital access by a digital user. Can be
PROCESS PROTECTION / PROTECTION OF OTHER DEVICES
100 %RH when condensation forms on the sensor. Can be
and the calculated parameter depending on the user
application. Can be configured, enabled or disabled
Out-of-limit values trigger a digital alarm which can be also
A bad humidity or temperature sensor triggers a digital alarm
Instruction Manual
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temperature in the event of a sensor failure. Can be
© 2015; Rotronic AG E-M-XB-V1_25
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