Model SRH400
Operating Instructions
Setra Systems, Inc.
159 Swanson Road, Boxborough, MA 01719
800.257.3872 • www.setra.com
© 2018 Setra Systems, Inc.
The material in this document is for information purposes only and is subject to change without notice. Setra Systems
assumes no responsibility for any errors or for consequential damages that may result from the use or misrepresentation of
any of the material in this publication.
Table of Contents
1.0 General
2.0 Product description
3.0 Scope of supply
4.0 Installation
5.0 Probe protection during cleaning and sterilization operations
6.0 Electrical connections
7.0 User interface
8.0 RH and T adjustment of probes
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1.1 Explanation of symbols
1.2 Safety instructions
1.3 Environmental aspects
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4.1 Mounting of the enclosure
4.2 Connecting the sensing probes
4.3 Probes connected directly to SRH400
4.4 Probes connected to SRH400 with extension cables
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6.1 Connection diagram
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7.1 Display
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8.1 Denitions
8.2 S07 adjustment with SRH400 basic device
8.3 1-point RH and T adjustment
8.4 Return to factory calibration
8.5 Loop adjustment and calibration in the eld
8.6 S07 individual adjustment
9.0 Functional and accuracy check of SRH400 basic unit
9.1 SRH400 check using the display
9.2 Check the SRH400 outputs
9.3 Humidity check
9.4 Temperature check
10.0 Technical data
11.0 Spare parts and accessories
12.0 Returning products for repair
12.1 Calibration services
13.0 Warranty and limitation of liability
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SRH400 Operating Instructions
1.0 General
This operation manual is part of the scope of supply and
serves for ensuring proper handling and optimal functioning
of the device. The operation manual shall be read before
commissioning the equipment and it shall be provided
to all staff involved in transport, installation, operation,
maintenance and repair.
The operation manual may not be used for the purposes of
competition without the written consent of Setra Systems,
Inc. and may not be forwarded to third parties. Copies may
be made for internal purposes. All information, technical
data and diagrams included in these instructions are based
on the information available at the time of writing.
1.1 Explanation of symbols
This symbol indicates safety information.
It is essential that all safety information is strictly
observed. Failure to comply with this information
can lead to personal injuries or damage to
property. Setra Systems, Inc. assumes no liability
if this happens.
This symbol indicates instructions.
The instructions shall be observed in order to
reach optimal performance of the device.
The user is responsible for observing all applicable safety
guidelines, local and international, with respect to safe
installation and operation on the device. This operating
manual contains information and warnings that must be
observed by the user in order to ensure safe operation.
• Mounting, start-up, operation and maintenance of the
device may be performed by qualied staff only. Such staff
must be authorized by the plant operator to carry out the
mentioned activities.
• The qualied staff must have read and understood this
operating manual and must follow the instructions
contained within.
• All process and electrical connections shall be thoroughly
checked by authorized staff before putting the system into
operation.
• Do not install or start start-up a device supposed to be
faulty. Make sure that such devices are not accidentally
used by marking them clearly as faulty.
• A faulty device may only be investigated and possibly
repaired by qualied, trained and authorized staff. If the
fault cannot be xed, the device shall be removed from the
system.
• Service operations other than described in this operating
manual may only be performed by the manufacturer.
1.2 Safety instructions
1.2.1 General safety instructions
• Avoid any unnecessary mechanical stress and
inappropriate use.
• When replacing the lter cap make sure not to touch the
sensing elements.
• For sensor cleaning please see “Cleaning instructions” at
www.setra.com.
• Installation, electrical connection, maintenance and
commissioning shall be performed by qualied
personnel only.
1.2.2 Mounting, start-up and operation
The humidity / temperature transmitter has been produced
under state of the art manufacturing conditions, has been
thoroughly tested and has left the factory fullling all safety
criteria. The manufacturer has taken all precautions to
ensure safe operation of the device. The user must ensure
that the device is set up and installed in a manner that does
not have a negative effect on its safe use.
DISCLAIMER:
The manufacturer or his authorized agent can be only be
held liable in case of wilful or gross negligence. In any case,
the scope of liability is limited to the corresponding amount
of the order issued to the manufacturer. The manufacturer
assumes no liability for damages incurred due to failure
to comply with the applicable regulations, operating
instructions or the operating conditions. Consequential
damages are excluded from the liability.
1.3 Environmental aspects
Products from Setra System, Inc. are developed
and manufactured observing of all relevant
requirements with respect to environment
protection. Please observe local regulations for
the device disposal.
For disposal, the individual components of the
device must be separated according to local
recycling regulations. The electronics shall be
disposed of correctly as electronics waste.
4
Phone: (800) 257-3872 | Fax: (978) 264-0292 | www.setra.com
2.0 Product description
4.0 Installation
The innovative, modular SRH400 humidity (RH) and
temperature (T) transmitter consists of a basic unit and
various pluggable, interchangeable probes.
The basic unit can accommodate one combined RH and T
probe or two separate probes, one for RH and one for T. The
probes are available in stainless steel enclosure, and can be
plugged onto the basic unit either directly or with extension
cables up to 10 m (32.8 ft) long. An optional kit facilitates the
mounting of the probes into duct.
The SRH400 basic unit is available a with metal enclosure,
suitable for wall mount.
The measured values are available on two analogue voltage
or current (2 wire, 4 – 20 mA) outputs, as well as on the
optional display.
One or two point adjustment for RH and T of the transmitter
can be easily performed with push buttons on the electronics
board of the SRH400 basic unit. Alternatively, the probes can be
adjusted individually with the PCA Product Conguration
Adapter.
3.0 Scope of supply
4.1 Mounting of the enclosure
Drill the mounting holes according to the mounting template.
Fix the back cover of the enclosure with 4 screws, max.
diameter 4.2 mm (0.2”), not included in the scope of supply.
Perform the electrical connection according chapter “6.
Electrical connections”.
Fix the front cover onto the back cover with the four screws
included in the scope of supply.
SRH400 Basic Unit (does not include probes or probe cables;
these are to be ordered separately)
• SRH400 according to ordering guide
• Gland tting PG9
• Calibration certicate
• Operating instructions
Probe
• RH/T probe or RH and Temp probes separately,
depending on order
• Calibration certicate
Probe cable
• Probe cable depending on order
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
5
SRH400 Operating Instructions
4.2 Connecting the sensing probes
The humidity (RH) probe or the combined humidity and
temperature (RH&T) probe must be connected at position 1.
The T probe must be connected at position 2.
4.3 S07 probes connected directly to SRH400
SRH400 with xed probe:
The probes can be also connected to the SRH400 housing
with extension cables, see chapter “11. Accessories”. The
probe may be mounted pointing upwards or downwards.
The probe can be xed onto a wall with the wall mounting
clip SRHWMC.
5.0 Probe protection during cleaning and
sterilizing operations
Periodical cleaning and sterilizing operations are common
in pharma and food industries, as well as in incubators
or hatchers. Cleaning and sterilizing agents may affect
the sensors and lead to drift and corrosion. It is highly
recommended to or remove the probes during cleaning and
sterilizing.
In order to avoid misreading caused by self-heating, the
device shall be installed with the probes pointing downwards.
In very humid, condensing environment it is recommended
to use the SRH400 version with remote probe, please see
below.
4.4 probes connected to SRH400 with extension
cables
SRH400 with remote sensing probe:
6
Phone: (800) 257-3872 | Fax: (978) 264-0292 | www.setra.com
6.0 Electrical connections
3
4
1 2
5
see gure Fig. 5 Voltage output and Fig. 6 Current ouput
EMC recommendations for wiring
The requirements of EMC standards as specied in the technical data are only fullled with the probes connected
either directly or with Setra original extension cables to SRH400.
• SRH400 with metal enclosure must be grounded either at the designated points on the inside, or outside at the
mounting plate. The probe must not be grounded; it must be electrically isolated from the GND.
• Locate the SRH400, the probe cable and the output cables as far as possible from sources of electromagnetic
disturbances.
• For the analogue outputs use either shielded or twisted cable pairs. The shield shall be grounded at one end
only, preferably at the controller side.
• Cable loops may impact on the EMC behavior of SRH400. Keep all cables as short as possible. Unused wires
shall be grounded at both ends. Run all cables as close as possible to the ground potential, for instance close to
the walls or steel structure elements.
6.1 Connection diagram
SRH400 - Analog volts
power supply
for 0 - 1 V: 10 - 35 V DC
9 - 29 V AC
for 0 - 10 V: 15 - 35 V DC
15 - 29 V AC
SRH400 - Analog millamps
power supply
20...35 V DC; R
11...35 V DC; R
<500 Ω
L
< 50 Ω
L
Figure 5. Figure 6.
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
7
SRH400 Operating Instructions
7.0 User interface
4-20 mA version
1. JUMPER: • Selection of output signals and of calibration mode
Voltage output 4-20 mA output
Voltage output version
RH Calib
0 - 1V
0 - 5V
T Calib
0 - 10V
1. Jumper
2. Display
3. Calib Led
4. Push-Button S1
5. Push-Button S2
Calib
T
RH
2. DISPLAY: • Socket for optional display
3. CALIB LED: • Continuously on indicates adjustment mode
4. S1 Functions • 1-point RH or T adjustment
5. S2 Functions • 1-point RH or T adjustment
S1 + S2 Fu nc ti on : • Reset to factory calibration
7.1 Display
selection of output
• 1 flash conrms reset to factory calibration
(RH > 50%RH; T within the upper half of the T scale)
• 2-point RH or T adjustment (high calibration point)
• Save adjustment data
(RH < 50%RH; T within the lower half of the T scale)
• 2-point RH or T adjustment (low calibration point)
• Exit the adjustment mode without saving the data
1. CAL
2. °C / °F
3. %RH
1. CAL: • Indicates adjustment mode
2. °C / °F: • T measuring unit
3. % RH: • RH measuring unit
8
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8.0 RH and T adjustment of the probes
8.2.1 2-point RH and T adjustment
8.1 Denitions
Calibration
The calibration documents the accuracy of a measurement
device. The device under test (specimen) is compared
with the reference and the deviations are documented in a
calibration certicate. During the calibration, the specimen
is not changed or improved in any way.
Adjustment
The adjustment improves the measurement accuracy of a
device. The specimen is compared with the reference and
brought in line with it. An adjustment can be followed by a
calibration which documents the accuracy of the adjusted
specimen.
8.2 Sensing adjustment with SRH400 basic
device
• 1-point RH or T adjustment for optimal performance over
a narrow RH or T range.
Example: climate monitoring in a pharma manufacturing
site. RH range: 40…60 % RH, RH adjustment point: 50 %
RH T range: 15…25 °C (59…77 °F) T adjustment point: 20
°C (68 °F)
• 2-point RH or T adjustment for accurate measurement
over a wide RH or T range.
Example: outdoor measurement
RH range: 10 … 100 % RH, RH adjustment points: 40
% RH, 70 % RH T range: -30 … 35 °C (-22...95 °F), T
adjustment points: -10 °C (14 °F), 15 °C (59 °F)
• The adjustment data is saved into the probes. The SRH400
basic unit is not affected by the adjustment procedure.
Consequently, it is possible to replace the probes at any
moment.
• Start the adjustment procedure with the low point (e.g. 30
% RH) and continue with the high point (e.g. 80 % RH)
• For accurate calibration or adjustment, the specimen and
the reference must have same T.
• During calibration or adjustment the T shall remain
constant.
• Allow min. 30 min, stabilization time for RH calibration or
adjustment.
• If needed, clean the sensors and replace the lter cap by
a new one.
1. Set the jumper to RH calib or to T Calib.
2. Place the probe into the corresponding calibrator and let
it stabilize at the rst point (low) for at least 30 minutes.
3. Press and hold S2 for 3 seconds. The LED “Calib” will light
and the symbol “CAL<” will appear on the SRH400 display.
4. Push S1 (up) or S2 (down) to bring the measured
value in line with the reference in steps of 0.1. The
actual corrected value is indicated on the display
and can be measured at the analogue output.
5. Press and hold S1 for 3 seconds to store the value into the
probe and end the rst (low) point adjustment. The LED
“Calib” will be deactivated and the display will show “CAL”
6. Alternative: Press and hold S2 for 3 seconds to exit
the adjustment mode without storing the adjustment
data. The LED “Calib” will be deactivated and the
symbol “CAL” disappears from the LC display.
7. Set the calibrator for the second (high) adjustment
point and let the probe stabilize for at least 30 min.
8. Press and hold S1 for 3 seconds. The LED “Calib” will light
and the symbol “CAL>” will appear on the SRH400 display.
9. Push S1 (up) or S2 (down) to bring the measured value
in line with the reference in steps of 0.1. The actual
corrected value is indicated on the display and can be
measured at the analogue output. Press and hold S1 for
3 seconds to store adjusted value in the probe and end
the second (high) point adjustment. The LED “Calib”
will be deactivated and the display will show “CAL”.
Alternative: Press and hold S2 for 3 seconds to
exit the adjustment mode without storing the
adjustment data. The LED “Calib” will be deactivate
and the symbol “CAL” disappears from the LC display.
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
9
SRH400 Operating Instructions
8.3 1-point RH and T adjustment
For best performance, the RH and the T adjustment point
shall be selected at the middle of the RH and T measurement
range of main interest.
1. Set the jumper to RH calib or to T Calib.
2. Place the probe into the corresponding calibrator and let
it stabilize at the selected RH or T value for at least 30
minutes.
3. For adjustment point in the lower half of the output scale,
press and hold S2 for 3 seconds. The LED “Calib” will light
and the symbol “CAL<” will appear on the SRH400 display.
For adjustment point in the upper half of the output scale,
press and hold S1 for 3 seconds. The LED “Calib” will light
and the symbol “CAL>” will appear on the SRH400 display.
4. Push S1 (up) or S2 (down) to bring the measured value in
line with the reference in steps of 0.1. The actual corrected
value is indicated on the display and can be measured at
the analogue output.
5. Press and hold S1 for 3 seconds to store adjusted value
in the S07 probe and end the rst (low) point adjustment.
The LED “Calib” will be deactivated and the display will
show “CAL”.
8.5 Loop adjustment and calibration in the eld
Loop calibration or adjustment in the eld, as required by the
FDA (Food and Drugs Administration) regulated industries,
is easily possible for the SRH400 with two separate probes.
Use extension cables to drop the probes into calibrators
without dismounting or disconnecting the SRH400 basic
unit. The illustration shows the RH probe placed into the
Humor 20 high end portable humidity calibrator, and the T
probe in a dry block calibrator.
8.6 Probe individual adjustment
The probes can be adjusted individually with the optional
Product Conguration Adapter and the optional Product
Conguration Software.
9.0 Functional and accuracy check of
SRH400 basic unit
The SRH400 basic unit can be checked with respect to
functionality and accuracy by using the SRH400 Reference
Probes Set, order number SRH400XXX (Fig. 4).
The set consists of two reference probes, which supply each
a pair of x humidity and temperature values as follows:
RH = 10 % , T = 45 °C (113 °F)
RH = 90 % , T = 5 °C (41 °F)
Alternative: Press and hold S2 for 3 seconds to exit the
adjustment mode without storing the adjustment data.
The LED “Calib” will deactivate and the symbol “CAL”
disappears from the LC display.
RH probe
T probe
Figure 3.
Loop calibration
Humidity calibrator
Temperature
calibrator
8.4 Return to factory calibration
During normal measurement mode of SRH400 (NOT during
adjustment mode!) press and hold together S1 and S2 for 5
seconds. The return to factory calibration is indicated by one
flash of the LED “Calib”.
The set includes a test report for each reference probe.
For SRH400 basic unit dedicated for only one combined RH
& T probe, both RH and T check shall be performed with each
reference probe connected at the single probe connection
socket.
For SRH400 basic unit ordered with for two separate RH and
T probes, the RH check shall be done with each reference
probe connected to the rst (left) socket, and then the T
check with the same probe connected to the second (right)
socket.
10
Phone: (800) 257-3872 | Fax: (978) 264-0292 | www.setra.com
9.1 SRH400 check using the display
power supply
power supply
20...35 V DC; R
L
<500 Ω
11...35 V DC; R
L
< 50 Ω
If the SRH400 basic unit features a display, as soon as the reference probe is connected the display shall show the
corresponding RH and T reference values.
9.2 Check of the SRH400 outputs
For the SRH400 with voltage output, a voltmeter shall be connected as in Fig. 5.
SRH400 - Analog volts
for 0 - 1 V: 10 - 35 V DC
9 - 29 V AC
for 0 - 10 V: 15 - 35 V DC
15 - 29 V AC
Figure 5.
Voltage output
For the SRH400 with current output, an ammeter shall be connected as in Fig. 6.
SRH400 - Analo milliamps
power supply
20...35 V DC; R
11...35 V DC; R
<500 Ω
L
< 50 Ω
L
Figure 6.
Current output
Make sure that the supply is appropriate for the output signal.
9.3 Humidity check
The table below shows the output signal for each reference probe.
Humidity reference 4 to 20 mA 0 to 1 V 0 to 5 V 0 to 10 V
Reference probe 1
10 % RH
Reference probe 2
90 % RH
5.6 mA 0.1 V 0.5 V 1.0 V
18.4 mA 0.9 V 4.5 V 9.0 V
Output
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
11
SRH400 Operating Instructions
9.4 Temperature check
The output signal depends on the scaling of the temperature output.
For current output: Iout [mA] = (16*(Ref/Tmax)) + 4 mA
For voltage output: Uout [V] = (Abb*(Ref/Tmax))
Where:
Abb ...................... voltage scaling (1 V, 5 V, 10 V)
Ref ....................... reference value of temperature (45 °C (113 °F) resp. 5 °C (41 °F))
Tmax ...................max. temperature scaling (e.g. 50 °C (122 °F))
Output
Temperature reference 4 to 20 mA 0 to 1 V 0 to 5 V 0 to 10 V
Reference probe 1
45 °C (113 °F)
Reference probe 2
5 °C (41 °F)
18.4 mA 0.1 V 4.5 V 9.0 V
5.6 mA 0.9 V 0.5 V 1.0 V
12
Phone: (800) 257-3872 | Fax: (978) 264-0292 | www.setra.com
10.0 Technical data
General
Supply voltage (Class III)
for 0-10 V output: 15-35 VDC or 15-29 VAC
for 4-20 mA output: 10 -35 VDC
Current consumption
DC supply: typ. 10 mA
AC supply: typ. 20 mA
Load resistor (for 4-20 mA output) RL < (UV-10 V/0.02 A)[Ω]
Connection Screw terminals, max. 2.5 mm
Housing material Cast away - AlSi9Cu
Protection class IP65/ NEMA 4
Specications subject to change without notice.
General (cont.)
Cable tting
Sensor protection Membrane lter
Electromagnetic compatibility EN61326-1, EN61326-2-3, Industrial environment
Temperature ranges
cable Ø 4.5-100 mm (0.18-0.39”)
Operating: -40 to 60°C (-40 to 140°F)
Storage: -40 to 60°C (-40 to 140°F)
Outputs
0-100% RH
2
3
0-10 V: -1 mA < IL < 1 mA
4-20 mA (2-wire): RL < 500 Ω
T dependence of analog outputs
Max. 0.2 mV/°C
PG9
Resp. 1 μA/°C
11.0 Spare parts and accessories
Category EE Accessory P/N Setra Accessory P/N Description
Filters HA010101 SRHMF Membrane lter
Filters HA010103 SRHSS Stainless steel sintered lter
Filters HA010104 SRHPG Plastic grid lter
Filters HA010105 SRHPF PTFE - lter Ø12mm
Filters HA010106 SRHMG Metal grid lter
Filters HA010115 SRHHP H2O2 - lter
Flanges HA010201 SRHSMF Stainless steel mounting flange 12mm
Flanges HA010209 SRHDMK Duct mounting kit (for SRH400)
Flanges HA010211 SRHWMC Wall mounting clip for probe Ø12mm
Flanges HA010214 SRHPMFB Plastic mounting flange 12mm; black
Flanges HA010202 SRHPMFG Plastic mounting flange 12mm; grey (RAL7035)
Part conguration adapter EE-PCA SETRAPCA1 Conguration adapter transmitter to RS232 and USB
Part conguration adapter HA011057 SETRAPCA4 Conguration cable for humidity & temp probe SRP4xxx
Cable for SRH400 HA010801 SRC400W Remote probe extension cable - 2 meter
Cable for SRH400 HA010802 SRC400F Remote probe extension cable - 5 meter
Cable for SRH400 HA010803 SRC400X Remote probe extension cable - 10 meter
RH & temp sensor probe SRH400 EE07-MFT6HC01 SRP400HTMGM SRH400 humidity/ temperature sensor with coating
Temp sensor probe SRH400 EE07-MT SRP400TPNNM SRH400 temperature sensor
Calibration ISO-AH3ASD SRH400SCAL SRH400 calibration (ISO)
Calibration OEKD-AH3A1SD SRH400NCAL SRH400 calibration (NIST)
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
13
SRH400 Operating Instructions
12.0 Returning products for repair
Please contact a Setra application engineer (800-257-3872, 978-263-1400) before returning unit for repair to review information
relative to your application. Many times only minor eld adjustments may be necessary. If a return is required please call 1-800-
257-3872 or email orders@setra.com to obtain an RMA number before sending unit(s) back to us. Once an RMA number has
been assigned to you, please send the package back to the below address.
Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719-1304
Attn: Repair Department
To download return form, please visit Setra’s service page.
To assure prompt handling, please make sure the RMA number is on the outside of the box and a copy of the service request
from is included in the shipment. If applicable, include a copy of the PO for return in the shipment.
NOTES:
Please remove any pressure ttings and plumbing that you have installed and enclose any required mating electrical connectors
and wiring diagrams.
Allow approximately 3 weeks after receipt at Setra for the repair and return of the unit. Non-warranty repairs will not be made
without customer approval and a purchase order to cover repair chargers.
12.1 Calibration services
Setra maintains a complete calibrations facility that is traceable to the National Institute of Standards and Technology (NIST).
If you would like to recalibrate or recertify your Setra pressure transducers or transmitters, please call our Repair Department
at 800-257-3872 (978-263-1400) for scheduling.
14
Phone: (800) 257-3872 | Fax: (978) 264-0292 | www.setra.com
13.0 Warranty and limitation of liability
SETRA warrants its products to be free from defects in materials and workmanship, subject to the following terms and
conditions: Without charge, SETRA will repair or replace products found to be defective in materials or workmanship within
the warranty period; provided that:
a) the product has not been subjected to abuse, neglect, accident, incorrect wiring not our own, improper
installation or servicing, or use in violation of instructions furnished by SETRA;
b) the product has not been repaired or altered by anyone except SETRA or its authorized service agencies;
c) the serial number or date code has not been removed, defaced, or otherwise changed; and
d) examination discloses, in the judgment of SETRA, the defect in materials or workmanship developed under
normal installation, use and service;
e) SETRA is notied in advance of and the product is returned to SETRA transportation prepaid.
Unless otherwise specied in a manual or warranty card, or agreed to in writing and signed by a SETRA ofcer, SETRA pres-
sure, humidity, and acceleration products shall be warranted for one year from date of sale.
The foregoing warranty is in lieu of all warranties, express, implied or statutory, including but not limited to, any implied warranty of merchantability for a particular purpose.
SETRA’s liability for breach of warranty is limited to repair or replacement, or if the goods cannot be repaired or replaced, to
a refund of the purchase price. In no instance shall SETRA be liable for incidental or consequential damages arising from
a breach of warranty, or from the use or installation of its products. No representative or person is authorized to give any
warranty other than as set out above or to assume for SETRA any other liability in connection with the sale of its products.
For all CE technical questions, contact Setra Systems, USA. EU customers may contact our EU representative Hengstler
GmbH, Uhlandstr 49, 78554 Aldingen, Germany (Tel: +49-7424-890; Fax: +49-7424-89500).
© Setra Systems, Inc. All Rights Reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.
15
SS-SRH400 Rev. B 09/2018
Setra Systems, Inc.
159 Swanson Road, Boxborough, MA 01719
800.257.3872 • www.setra.com
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