Rotronic XB User manual

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 1of 29
Document title
XB
Humidity Temperature Transmitter
User Guide
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 2of 29
Document title
Table of contents
1Overview...............................................................................................................................................3
2Dimensional drawings.........................................................................................................................4
3General 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
4Mechanical installation......................................................................................................................11
4.1 General guidelines ...........................................................................................................................11
5Electrical installation.........................................................................................................................13
5.1 General guidelines ...........................................................................................................................13
5.2 Wiring and terminal block diagrams.................................................................................................14
6Operation............................................................................................................................................19
6.1 Minimum load requirements for the XB3 with voltage outputs..........................................................19
6.2 XB2 and XB3 transmitters (analog outputs) .....................................................................................19
7Maintenance.......................................................................................................................................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
8Firmware updates..............................................................................................................................23
9Technical 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 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 3of 29
Document title
Applicability:
This manual applies to all instruments of the XB transmitter series with firmware version 3.0 or higher. 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 canbe equipped with an additionalPt100 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.
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 4of 29
Document title
2 Dimensional drawings
Board thickness:
1.7 mm / 0.07”
Clearance bottom:
5 mm / 0.20”
Clearance top (component side):
15 mm / 0.60”
Overall probe length: 116 / 266 mm (4.57 / 10.47”)
Diameter: 15 mm (0.59”)
Cable length: 2 m (6.5 ft)
Dimensions in mm
4 x mounting hole
dia: 4.4 mm / 0.173”
V+
V
-
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 5of 29
Document title
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 powered): 10…28 VDC - depending on the load connected to theoutput(s).The 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 with analog outputs): 15 to 40 VDC (see note below) or 12 to 28 VAC. With both output circuits
closed, the maximum current consumption 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 Ωload
18 VDC or 13power with 500 Ωload
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 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 6of 29
Document title
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:.
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
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 or0…10V. Both output signals areautomatically 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 isequipped with one Pt100 RTD. When ordered with the direct RTD option, the XB
transmitter is supplied with a second Pt100 RTD installedon the probe. This additional RTD is directly connected
to a terminal block. (4-wire connection)
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 7of 29
Document title
3.6 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-
USB type connector. This 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 andtemperature adjustment, readdata 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 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 8of 29
Document title
User configurable settings and functions
The XB transmitter ships configured as specified on the customer 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
AirChip 3000 Functions
Description
►Humidity / temperature adjustment
o1-point or multi-point humidity calibration or adjustment
o1-point or 2-point temperature calibration or adjustment
oGenerate a time stamp for calibrations and adjustments
oRetain and view last adjustment date and adjustment
values
oGenerate calibration and adjustment protocols
►Automatic humidity sensor test
and optional drift compensation
Tests the humidity sensor for drift caused by contaminants
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
for drift) or Bad (defective)
►Data recording
The data recording function differs from a true data logging
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
oStart or stop data recording - up to 2000 value pairs
(%RH and temperature). Starting a recording session
erases all previously recorded data
oThe recording mode and log interval can be specified
oWhen 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
oThe recorded data can be downloaded to a PC with the
HW4 software, time stamped and viewed
MEASUREMENT LOOP VALIDATION
AirChip 3000 Functions
Description
►Simulator mode
Used to make the XB transmitter generate fixed values for
the humidity, temperature and calculated parameter. Can be
configured, enabled or disabled
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 9of 29
Document title
DEVICE SAFEGUARDS
AirChip 3000 Functions
Description
►Device write protection
Used to protect the XB transmitter with a password to
prevent unauthorized digital access by a digital user. Can be
configured, enabled or disabled
PROCESS PROTECTION / PROTECTION OF OTHER DEVICES
AirChip 3000 Functions
Description
►Limit humidity output to 100 %RH
Used to prevent the humidity signal from exceeding
100 %RH when condensation forms on the sensor. Can be
enabled or disabled
►Out-of-limit value alarm
Used to specify the normal range for humidity, temperature
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
be seen on the optional display
►Bad sensor alarm
Built-in function. Cannot be disabled
A bad humidity or temperature sensor triggers a digital alarm
which can be also be seen on the optional display
►Fail safe mode
Used to specify a "safe" fixed value for humidity and for
temperature in the event of a sensor failure. Can be
configured, enabled or disabled
© 2015; Rotronic AG E-M-XB-V1_25

E-M-XB-V1_25 Rotronic AG
Bassersdorf, Switzerland
Document code Unit
XB Humidity Temperature Transmitter
User Guide Instruction Manual
Document Type
Page 10 of 29
Document title
3.9 Factory default settings
Configuration of the XB transmitter by the user and access to its functions requires a PC with the ROTRONIC
HW4 software (version 2.1.1 or higher) installed. Service cable AC3006 or AC3009 is used to connect the XB
service connector to a USB port of the PC (see Maintenance > Service Cable).
Configurable Settings
Applicability
Factory default
Unit system (Metric or English)
XB2, XB3
As per ordering code
Analog signal type (4…20 mA or other)
XB3
As per ordering code
Psychrometric calculation
XB2, XB3
As per ordering code
Output 1 parameter, scale and unit
XB2, XB3
As per ordering code (%RH or DP)
Output 2 parameter, scale and unit XB2, XB3
Temperature, unit as per ordering
code
Functions
Applicability
Factory default
Humidity / temperature adjustment
XB2, XB3
Device write protection
XB2, XB3
Disabled
Limit humidity output to 100 %RH
XB2, XB3
Enabled
Out-of-limit value digital / display alarm
XB2, XB3
Disabled
Data recording XB2, XB3
Enabled (loop mode – 10 min.
interval)
Automatic humidity sensor test
XB2, XB3
Disabled
Humidity sensor drift compensation
XB2, XB3
Disabled
Fail safe mode
XB2, XB3
Disabled
Simulator mode
XB2, XB3
Disabled
•For a detailed description of all AirChip 3000 / XB transmitter main functions see document
E-T-AC3000-DF-V1
•Instructions regarding the configuration of the XB transmitter and access to its functions are provided in
the following manuals:
E-M-HW4v3-Main
E-M-HW4v3-F2-009
E-M-HW4v3-DR-001
E-M-HW4v3-A2-001
•The factory default setting for dew / frost point calculation is frost point below freezing
© 2015; Rotronic AG E-M-XB-V1_25