Labom GA261 Series User manual
Resistance thermometer clamp-on technology
for temperature measurement on pipes,
Type series GA261x
LABOM Mess- und Regeltechnik GmbH Im Gewerbepark 13 27798 Hude Germany
BA_049_2019-06_10.00
Operating Instructions
1General Information.......................................................................................................2
1.1 General Safety Notes..............................................................................................2
1.2 Intended Use...........................................................................................................2
1.3 Conformity with EU Regulations..............................................................................2
1.4 ATEX Approval........................................................................................................2
2Transportation and Storage..........................................................................................2
3Installation and Commissioning ..................................................................................2
3.1 Mechanical Installation............................................................................................2
3.2 Electrical Connection ..............................................................................................5
4Operation........................................................................................................................6
4.1 Calibration...............................................................................................................6
4.2 Maintenance / Service.............................................................................................6
5Disassembly...................................................................................................................6
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1 General Information
This document contains necessary information for the proper installation and use of this
device. In addition to this instruction, be sure to observe all statutory requirements, appli-
cable standards, the additional technical specifications on the accompanying data sheet
(see www.labom.com) as well as the specifications indicated on the type plate.
1.1 General Safety Notes
The installation, set up, service or disassembly of this device must only be done by
trained, qualified personnel using suitable equipment and authorized to do so.
Ensure that the device is suitable for the process and undamaged.
1.2 Intended Use
The device is intended to measure surface temperatures as specified in the data sheet.
1.3 Conformity with EU Regulations
The CE-marking on the device certifies its compliance with the applicable EU Directives for
placing products on the market within the European Union.
You find the complete EU Declaration of Conformity (document no. KE_011) at
www.labom.com.
1.4 ATEX Approval
Devices of the type GA26x1 are certified for use in explosive environments.
If you purchased a device with ATEX approval, please refer to the accompanying docu-
ment XA_001 for ATEX-relevant information.
2 Transportation and Storage
Store and transport the device only under clean and dry conditions preferably in the origi-
nal packaging. Avoid exposure to shocks and excessive vibrations.
Permissible storage temperature: -40…100 °C
When supplied with a transmitter the max. permissible storage temperature is reduced to
85 °C.
3 Installation and Commissioning
The device is adapted to a certain pipe diameter as specified in the order. Before installing
the device, be sure that the device is suitable for the intended process application with re-
spect to pipe diameter, ambient and medium temperature.
3.1 Mechanical Installation
Mount the device on a clean and straight pipe section free of imperfections like nicks or
burrs.
Mount the measuring insert at the bottom side of the pipe, if it is not completely filled with
medium.
First mount the clamping element, then install the measuring insert and finally make the
electrical connections.
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3.1.1 Mounting the clamping element
There are three options how to connect the device to the process:
Figure 1: mounting options: a) clamping block, b) clamping shoe and c) clamping bracket
3.1.1.1 Mounting the clamping block
Required tools:
Hexagon socket wrench 3 mm (mounting screws)
Hexagon socket wrench 2 mm (vibration protection)
Turn back the vibration protection, so that it
does not exceed the semi-cycle groove for the
pipe (see picture to the right).
Mount the clamping block with the included
screws at the intended position on the pipe. Do
not exceed the allowed tightening torque of 2
Nm for pipe diameters up to 17,2 mm and 4
Nm for bigger pipes.
Hand-tighten the vibration protection. Do not
tighten the vibration protection screw too hard.
You might damage the clamping block or the
pipe.
Figure 2: Clamping block from below
3.1.1.2 Mounting the clamping shoe
Required tools:
depends on the used hose clamps
Mount the clamping shoe with two appropriate hose clamps or tightening straps.
The maximum width for a safe fit is 5 mm.
Tighten the clamps so that the clamping shoe cannot be moved by hand applying a
usual hand force.
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3.1.1.3 Mounting the clamping bracket
In an environment with space constraints you can use the mounting bracket.
Required tools:
Hexagon socket wrench 3 mm
Loosen the clamping bracket by unscrewing
the mounting screw so that you can easily
move it over the pipe.
Position the clamping bracket and tighten the
mounting screw. Do not exceed a tightening
torque of 1 Nm.
Figure 3: mounting bracket from above
3.1.2 Mounting the measuring insert
The mounting procedure for the measuring insert is identical for all clamping elements.
First apply heat conductive paste to the tip of the measuring insert. Heat conductive paste
is mandatory for this type series for a good measuring accuracy.
Now insert the measuring insert into the bore in the clamping element. You can position
the insert in two ways. Choose the position that simplifies the later cable routing.
Finally tighten the connection by turning the screw connection (see figure 4). No tools are
required for this step. Never try to turn the housing, if you have a device with field housing
or integrated transmitter. You might destroy the device by this.
Do not turn or move the clamping element with a mounted measuring insert. You might
damage or destroy the insert.
Figure 4: Mounting steps for the measuring insert
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3.2 Electrical Connection
Complete the mechanical installation before you connect the device electrically.
Set up all electrical connections while the voltage supply is switched off.
Circular connector
3-wire
4-wire
(3-wire bridged)
4-wire
Transmitter
(Type PA2430)
Transmitter IO-Link
(Type PA2530)
Cable gland
3-wire
4-wire
Figure 5: Variants of electrical connection
Route the cable so that it does not apply force or torque to the measuring insert.
For devices with field housing, hold the housing with the other hand when you screw or
unscrew the field housing cap.
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4 Operation
During device operation, take care that the device remains within its intended temperature
range. No other monitoring is necessary.
Permissible media temperature: -40…150 °C
Permissible ambient temperature: -40…100 °C
When supplied with a transmitter, the permissible ambient temperature is reduced to 85°C.
Restricted ambient conditions may apply in explosion protected environments (see
XA_001).
4.1 Calibration
We recommend an annual recalibration.
Uninstall only the measuring insert. This way the measuring position remains unchanged
as it is defined by the clamping element.
During calibration you must not exceed 100 °C at the electrical connector due to inside
gaskets. If your device is equipped with an integrated temperature transmitter you must
not exceed 85 °C at the housing.
Apply new heat conductive paste when you reinstall the measuring insert after the calibra-
tion. This ensures a good and constant thermal coupling between insert and pipe.
For further details please consult the separate calibration guideline for the Clamp-on family
(TA_008).
4.2 Maintenance / Service
When properly installed in accordance with applicable specifications, this device is
maintenance-free. However, we recommend an annual recalibration of the device.
In the event of a device malfunction, you can only replace the complete measuring insert
resp. the clamping element.
5 Disassembly
When measuring hot media, make sure that the device has cooled down prior to any dis-
mounting or wear appropriate protective clothing to avoid burns.
Switch off the power supply to the device before disconnecting the electrical connections.
Once this is done, the device may be mechanically removed.
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