HBM WA Series User manual

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
English Deutsch Français Italiano
WA…

Hottinger Brüel &Kjaer GmbH
Im Tiefen See 45
D-64239 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbm.com
Mat.: 7-2001.0716
DVS: A00546_11_YI0_01 HBM: public
10.2021
EHottinger Brüel & Kjaer GmbH
Subject to modifications.
All product descriptions are for general information only.
They are not to be understood as a guarantee of quality or
durability.
Änderungen vorbehalten.
Alle Angaben beschreiben unsere Produkte in allgemeiner
Form. Sie stellen keine Beschaffenheits- oder Haltbarkeits
garantie dar.
Sous réserve de modifications.
Les caractéristiques indiquées ne décrivent nos produits
que sous une forme générale. Elles n'impliquent aucune
garantie de qualité ou de durabilité.
Con riserva di modifica.
Tutti i dati descrivono i nostri prodotti in forma generica e non
implicano alcuna garanzia di qualità o di durata dei prodotti
stessi.

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
English Deutsch Français Italiano
WA…

2A00546_11_YI0_01 HBM: public WA…
English
1 Safety instructions 4........................................
2 Introduction 7..............................................
3 Mounting 8.................................................
4 Electrical structure and connection 10........................
4.1 Pin assignment 10............................................
4.2 Version with WA electronics 10.................................
4.3 Pin assignment WA electronics 11..............................
4.4 Principle of measurement, wiring assignment: WA2 13.............
4.5 Principle of meas., wiring assignment: WA10...WA500 14..........
5 Balancing 16................................................
5.1 Zero balance 16..............................................
5.1.1 Zero balance or adjustment (without electronics) 16...............
5.1.2 Zero balance or adjustment (with electronics) 17..................
5.2 Calibration 18................................................
5.2.1 Coarse adjustment using marking rings on the plunger 18..........
5.2.2 Direct calibration 18...........................................
5.2.3 Calibration with input of characteristics 19........................
6 Hydraulic version 20.........................................
6.1 Instructions for mounting a piston 20............................
7 Dynamic measurements 21...................................
7.1 Frequency and acceleration limits 21............................
8 Interference effects 22.......................................
8.1 Shielding design 23...........................................
8.2 Signal ground 23.............................................

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9 Dimensions 24..............................................
10 Types of connection (mechanical) 26.........................
11 Dimensions WA electronics 28...............................
12 Mounting set 28.............................................
13 Specifications 29............................................
13.1 Specifications WA electronics 32................................
14 Replacement parts, accessories 33...........................
15 Versions and order numbers 34..............................

Safety instructions
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1 Safety instructions
Use in accordance with the regulations
Displacement transducers of the WA type series are suitable for all situations
where there are strict ruggedness and accuracy requirements, such as in
research, development and industrial applications. Use for any additional
purpose shall be deemed to be not in accordance with the regulations.
In the interests of safety, the transducer should only be operated as described
in the Mounting Instructions. It is also essential to observe the appropriate legal
and safety regulations for the application concerned during use. The same
applies to the use of accessories.
The transducer is not a safety element within the meaning of its use as
intended. Proper and safe operation of this transducer requires proper
transportation, correct storage, assembly and mounting and careful operation
and maintenance.
General dangers due to non‐observance of the safety instructions
The WA displacement transducer corresponds to the state of the art and is
fail‐safe.
The transducers can give rise to residual dangers if they are inappropriately
installed and operated by untrained personnel.
Everyone involved with the installation, commissioning, maintenance or repair
of a displacement transducer must have read and understood the Mounting
Instructions and in particular the technical safety instructions.
Residual dangers
The scope of supply and performance of the transducer covers only a small
area of displacement measurement technique. In addition, equipment planners,
installers and operators should plan, implement and respond to the safety
engineering considerations of displacement measurement technique in such a
way as to minimize residual dangers. Prevailing regulations must be complied
with at all times. There must be reference to the residual dangers connected
with displacement measurement technique

Safety instructions
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In these mounting instructions residual dangers are pointed out using the
following symbols:
Symbol Significance
CAUTION This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements can result in slight or moderate physical
injury.
Notice This marking draws your attention to a situation in
which failure to comply with safety requirements can
lead to damage to property.
Emphasis
See….
Italics are used to emphasize and highlight text and
references to other chapters and external documents.
CE mark
The CE mark enables the manufacturer to guarantee that the
product complies with the requirements of the relevant EC
directives (the Declaration of Conformity can be found at
http://www.hbm.com/HBMdoc).
Conversions and modifications
The transducer must not be modified from the design or safety engineering
point of view except with our express agreement. Any modification shall
exclude all liability on our part for any damage resulting therefrom.
Qualified personnel
This instrument is only to be installed by qualified personnel strictly in
accordance with the technical data and with the safety rules and regulations
which follow. It is also essential to observe the appropriate legal and safety
regulations for the application concerned. The same applies to the use of
accessories.
Qualified personnel means persons entrusted with the installation, fitting,
commissioning and operation of the product who possess the appropriate
qualifications for their function.

Safety instructions
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Accident prevention
The relevant accident prevention regulations of the trade safety associations
must be taken into account.

Introduction
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2 Introduction
HBM's WA displacement transducers are particularly well suited for use with all
applications requiring a high degree of durability and precision, such as
research, development and industry.
To provide documentary evidence of quality, a separate test report containing
the test data is included in the list of components supplied with the product.
All versions
Accuracy class options 0.2 or 0.1 are available for the transducers. An indi
vidual transducer characteristic is also supplied for both these accuracy
classes, as a test report. This documents the linearity error (including hyster
esis).
Probe version
Their external structure allows the displacement probes to be used like com
parators. They are distinguished by excellent resolution and accurate reprodu
cibility. The measuring element with the probe tip that is screwed into the probe
pin can be replaced with other measuring elements conforming to DIN 878
when required.
Displacement transducers can detect the displacement of measurement
objects occurring in the transducer axis direction. It is permissible to have
motion components perpendicular to the axis, if they do not exert any notice
able lateral force on the probe tip. This means that it is also possible to mea
sure irregularities, differences in thickness or ovalities on rolling or rotating
objects. It is also an advantage to use the transducers for high-precision mea
surements of the lengths and thickness differences of series of measurement
objects.

Mounting
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3 Mounting
All versions
The transducers can be clamped at the enclosure tube. But the best mounting
position is in the center of the transducer. The mounting blocks shown on page
28 can be obtained from HBM for a diameter of 12 mm.
The transducer axis must point in exactly the same direction as the displace
ment, moving components or change in length to be measured. They can
occupy any position in the space. It can be an advantage to only finally clamp
the transducer in conjunction with adjusting the zero position and the zero bal
ance.
Probe version Standard and High temperature
Transducers also have a cylindrical shaft diameter corresponding to fit 8h6 of
the standard for comparators, which allows them to be held in all clamping
devices and measuring systems designed for comparators. If under rough con
ditions, there are significant contamination and deposits on the probe pin, then
this must be cleaned at regular intervals with a lint-free cloth and, if necessary,
gently wetted with a low-viscosity, thermally stable oil. Make sure that the sur
face of the probe pin is intact.
The probe pins of the displacement transducer are conditionally corrosion-
proof. The transducers have been designed for industrial applications.
In humid environments, the probe versions require cleaning and oiling at regu
lar intervals. If there is surface rust, the probe pin can be cleaned using steel
wool or fine emery cloth and subsequently greased.
Using the transducers in humid and at the same time cold environments is not
recommended. Frosting and icing can influence the measuring system and
lead to errors. If these conditions occur the transducers have to be cleaned
constantly or actions to prevent the conditions have to be taken.
Probe version Low temperature
Transducers also have a cylindrical shaft diameter corresponding to fit 8h6 of
the standard for comparators, which allows them to be held in all clamping
devices and measuring systems designed for comparators. If under rough con
ditions, there are significant contamination and deposits on the probe pin, then

Mounting
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this must be cleaned at regular intervals with a lint-free cloth. Make sure that
the surface of the probe pin is intact.
The probe pins of the displacement transducer are conditionally corrosion-
proof. The transducers have been designed for industrial applications.
A reduced number of load cycles has to be expected with this version.
Notice
By no means must the probe pin be lubricated with oil. Otherwise, safe applica
tion up to -40 oC cannot be guaranteed. Use dry lubrication (e.g. graphite).

Electrical structure and connection
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4 Electrical structure and connection
The principle of measurement is based on an active quarter bridge (in the case
of the WA2, on an active half bridge), that is expanded to a full bridge
connection. The displacement transducer can be used in full‐bridge and
half‐bridge mode. The transducer is designed with integral sensor circuits to
operate in a six wire circuit.
When operating with a six wire amplifier, the cable can be shortened or
lengthened (to a maximum of 300m) without effect, as the additional sensor
circuits, gray and green, tap the voltage at the feeders in the sensor and carry
it back to the six wire amplifier. This regulates the voltage so that it reaches the
transducer loss‐free.
4.1 Pin assignment
Transducer
WA
Wire colour
Cable
Amplifier
15‐pin
Sub‐D
connector
15‐pin
D-SUB-15HD
connector
7‐pin
MS
connector
Measurement signal ())WH = white 8 5 A
Measurement signal (*)RD = red 1) 15 10 D
Excitation voltage ())BU = blue 6 3 C
Excitation voltage (*)BK = black 5 2 B
Sensor circuit ())GN = green 13 8 F
Sensor circuit (*)GY = gray 2) 12 7 G
Shield Enclosure Enclosure Enclosure
1) with full bridge only
2) for the high temperature version: violet
4.2 Version with WA electronics
The transducer is fitted with an integrated evaluation circuit for operating at
direct voltage (15...30 volts). The integrated evaluation circuit is designed for
operation with a separated extra‐low voltage (SELV circuit). The WA

Electrical structure and connection
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electronics are not designed to be connected to a direct voltage network in
accordance with EN 61010-1. The output signal is available as a standardized
voltage value. The lower range value of the transducer corresponds to 0.5 V
(live zero), the upper range value of the transducer corresponds to 10V. The
cable connecting the WA electronics to follower electronics can be shortened
or lengthened as required (max. 50m).
Notice
For versions with a plug connection between the transducer and the electronics
module, please note the following: Transducer and electronics are assigned to
each other and must not be interchanged.
With cable extensions, use shielded cable (see Section 4.1 “Pin assignment”,
Page 10).
4.3 Pin assignment WA electronics
ÏÏÏ
WH
BU
BK
0 +
RD
U
+ UB
+ UOUT
- UOUT
- UB
0.5V...10V
15...30VDC
0V
0V
Fig. 4.1 Electrical block diagram WA electronics

Electrical structure and connection
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Special notes on operating WA transducers
CAUTION
With amplifiers, you must connect zero operating voltage to the protection cir
cuit (terminals):
Sin the case of system devices with a sliding switch (e.g. MGC),
Sby connecting terminal 2 (zero operating voltage) to the protection circuit in
the case of the MVD2555 amplifier.
Connecting to terminals
1. The shield can be accessed through a notch in the cable sheath (see
Fig. 4.2).
2. Place the shield flat on the body of the casing.
Fitting to a connector
Place the cable shield flat on the connector housing (see chapter 8.1).
Cable sheath cut open at the circumference
Fig. 4.2 Notched cable sheath

Electrical structure and connection
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4.4 Principle of measurement, wiring assignment: WA2
ÏÏ
WH (white) Measurement signal ())
BU (blue) Excitation voltage (+)
BK (black) Excitation voltage (-)
0 )
GY (gray) Sensor circuit (-)
GN (green) Sensor circuit (+)
Cable shield Transducer housing
RD (red) Measurement signal (*)
ÏÏÏ
Fig. 4.3 General electrical wiring‐diagram, full bridge with 80mV/V
+-
* for the high and low temperature version: violet
ÏÏÏ
ÏÏÏ
ÏÏ
ÏÏ
WH (white) Measurement signal (+)
BU (blue) Excitation voltage (+)
BK (black) Excitation voltage (-)
GY (gray)* Sensor circuit (-)
GN (green) Sensor circuit (+)
Cable shield Transducer housing
Fig. 4.4 General electrical wiring‐diagram, half bridge with 40mV/V
For information on using other transducer connection types, refer to the
operating manual for the chosen amplifier (connection diagram WA, see types
of connection).

Electrical structure and connection
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80mV/V, 6‐pin
GY
BK
WH
BU
GN
RD
Fig. 4.5 Lemo connector pin assignment (solder side of male cable connector)
4.5 Principle of meas., wiring assignment: WA10...WA500
WH (white) Measurement signal (+)
BU (blue) Excitation voltage (+)
BK (black) Excitation voltage (-)
GY (gray) Sensor circuit (-)
GN (green) Sensor circuit (+)
Cable shield Transducer housing
RD (red) Measurement signal (-)
ÏÏÏÏ
0 )
Fig. 4.6 General electrical wiring‐diagram, full bridge

Electrical structure and connection
WA… A00546_11_YI0_01 HBM: public 15
ÏÏÏÏ
0 )
WH (white) Measurement signal ())
BU (blue) Excitation voltage (+)
BK (black) Excitation voltage (-)
GY (gray) Sensor circuit (-)
GN (green) Sensor circuit (+)
Cable shield Transducer housing
Fig. 4.7 General electrical wiring‐diagram, half bridge
For information on using other transducer connection types, refer to the
operating manual for the chosen amplifier (connection diagram WA, see types
of connection).
GY
BK
WH
BU
GN
RD
80mV/V, 6‐pin
Fig. 4.8 Lemo connector pin assignment (solder side of male cable connector)

Balancing
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5 Balancing
The transducer and plunger are arranged by Ident. No. to prevent transposi
tion. Plungers and coil systems that have not been balanced with one another
can give rise to measurement errors in excess of 1%.
Large measurement errors can also occur, if the plunger is deformed or dam
aged. In case of replacement, the complete transducer (plunger and trans
ducer) needs to be sent to HBM. The new core is adapted at HBM.
CAUTION
The transducer and plunger must not be transposed.
5.1 Zero balance
5.1.1 Zero balance or adjustment (without electronics)
Plunger (WA/...-L)
The plunger has a threaded piece for connecting it to the measurement object.
SInsert the plunger into the transducer as far as the first marking ring (the
projecting part of the plunger corresponds to size C, see page 24
“Dimensions").
Sfor the WA2: push in the core until the 0 ±1mV/V display. This requires an
amplifier providing tare and zero functions for zero balance.
The amplifier output signal is then zero balanced.

Balancing
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ÏÏÏÏÏÏÏÏÏÏÏÏ
100% 50% 0%Thread
Plunger Transducer
Fig. 5.1 Plunger with markings (zero balance)
Probe (WA/...-T)
The mechanical zero position of the displacement probe (size E, see chapter 9
"Dimensions", page 24) is derived for neutral position with probe tip extended.
Movement of the probe tip in the measurement direction by an initial stroke of
up to 0.5 mm has no effect on the technical data of the displacement probe.
Having chosen the position, any output signal still present should be reset to
zero on the amplifier. Initial stroke for the WA2 probe until 0±1mV/V is reached
on the amplifier.
5.1.2 Zero balance or adjustment (with electronics)
Loose plunger and probe version (WA/...-L/...-T)
The plunger has got a threaded connection piece for connection to the test
specimen. The mechanical zero position of the displacement probe (see
dimensions page 24) is derived for neutral position with probe tip extended. By
moving the loose plunger or probe tip in the direction of measurement until an
output signal of 0.5V +/- 0.05 V is displayed, the lower range value is reached.
At this position, the output signal at the subsequent electronics is to be
assigned to a displacement of 0.
CAUTION
The transducer and plunger must not be transposed. The same applies for the
amplifier and the transducer, if the amplifier can be separated from the trans
ducer through a plug.

Balancing
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Transducer and plunger are assigned to each other by an ID; this prevents
interchanging. Plungers and coil systems that have not been matched to each
other can cause measurement errors of > 1%.
5.2 Calibration
5.2.1 Coarse adjustment using marking rings on the plunger
By using the marking rings on the plunger, you can calibrate at an accuracy of
±1mm (not to be recommended for measurement “längen" ≤10mm). The
nominal displacement is derived by inserting the plunger as far as the last
marking ring (100%) before the plunger thread (the projecting part of the
plunger corresponds to size C minus size A, see "Dimensions", page 24).
With the plunger in this position, the output signal from the displacement
transducer (nominal sensitivity 80mV/V ±1%) has to be assigned to a display
or to an output signal from the amplifier.
With WA electronics the output signal of the displacement transducer in this
end position is 10V ±0.05V.
ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ
100% 50% 0%Thread
Plunger
Transducer
Fig. 5.2 Plunger with markings (sensitivity balancing)
5.2.2 Direct calibration
If a high degree of precision is required, we recommend direct calibration using
gauge blocks with dimensions corresponding to the displacement, movement
or change in length that you wish to measure. Use commercially available
gauge blocks or templates for this purpose.