HBM K3607 Manuel utilisateur
A0833-3.0 en/de
Kalibriergerät
Calibration instrument
K3607
Operating manual
Bedienungsanleitung
English Page 3 −12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deutsch Seite 13 −22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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K3607
HBMA0833-3.0 en/de
Contents Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety instructions 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Fields of application 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Connections 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Calibrating the measurement chain 9. . . . . . . . . . . . . . . . . . . . . . . . . . .
11 Works calibration of the K3607 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12 Effect of cable resistance 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 Pin assignment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Specifications 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4K3607
HBM A0833-3.0 en/de
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K3607
A0833-3.0 en/de HBM
Safety instructions
Appropriate use
The K3607 calibration instrument is to be used exclusively for measurement
tasks and directly related control tasks. Use for any purpose other than the
above shall be deemed to be not in accordance with the regulations.
In the interests of safety, the instrument should only be operated as described
in the Operating Manual. It is also essential to comply with the legal and
safety requirements for the application concerned during use. The same
applies to the use of accessories.
General dangers of failing to follow the safety instructions
The calibration instrument is a state of the art unit and as such is fail-safe.
The device may give rise to further dangers if it is inappropriately installed and
operated by untrained personnel.
Any person instructed to carry out installation, commissioning, maintenance or
repair of the device must have read and understood the Operating Manual
and in particular the technical safety instructions.
Conditions on site
Protect the device from direct contact with water.
Maintenance and cleaning
The calibration instrument is maintenance free. Please note the following
points when cleaning the housing:
−Before cleaning, disconnect the device from the power supply.
−Clean the housing with a soft, slightly damp (not wet!) cloth. You should
never use solvent, since this could damage the labelling on the front
panel.
−When cleaning, ensure that no liquid gets into the device or connections.
Remaining dangers
The scope of supply and list of components provided with the K3607 cover
only part of the scope of measurement technique. In addition, equipment
planners, installers and operators should plan, implement and respond to the
safety engineering considerations of measurement technique in such a way
as to minimize remaining dangers. Prevailing regulations must be complied
with at all times. There must be reference to the remaining dangers connected
with measurement technique.
6K3607
HBM A0833-3.0 en/de
Any risk of remaining dangers when working with the K3607 is pointed out in
this introduction by means of the following symbols:
Symbol: WARNING
Meaning: Dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements can result in death or serious physical injury.
Symbol: CAUTION
Meaning: Potentially dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements could result in damage to property or some form of
physical injury.
Symbol: NOTE
Means that important information about the product or its handling is being
given.
Symbol:
Meaning: 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).
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K3607
A0833-3.0 en/de HBM
Conversions and modifications
The device 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 resulting damage.
In particular, any repair or soldering work on motherboards is prohibited.
When exchanging complete modules, use only original parts from HBM.
Qualified personnel
This instrument is only to be installed and used by qualified personnel strictly
in accordance with the technical data and with the safety rules and regulations
which follow. It is also essential to comply with the legal and safety
requirements for the application concerned during use. The same applies to
the use of accessories.
Qualified personnel means persons entrusted with the installation, assembly,
commissioning and operation of the product who possess the appropriate
qualifications for their function.
Maintenance and repair work on an open device with the power on must only
be carried out by trained personnel who are aware of the dangers involved.
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HBM A0833-3.0 en/de
1 Fields of application
The K 3607 calibration instrument can be used to calibrate measuring
amplifiers or measurement chains without imposing a mechanical quantity on
the SG transducers belonging to the measurement chain.
For this purpose the calibration instrument is equipped with a high-precision
resistance network in star configuration, designed to simulate 350-ΩSG
full-bridge transducers.
The extremely low self-capacitance and self-inductance of the inbuilt precision
resistors place the calibration instrument in accuracy class 0.025.
When an appropriate measuring amplifier is used, the calibration instrument
can be operated in six-wire circuit for balancing the ohmic and capacitive
effects of long measurement cables.
K 3607 front panel
S1
S2
S3
S1 = polarity switch
S2 = calibration step switch
S3 = calibration value switch
Calibration valid at
end of cable (Kab.
0238A−3).
2 Connections
The connector cable between the calibration instrument and the measuring
amplifier is connected either to the 7-pin Amphenol connector MS 3102
A16S-1P (St1) or to the 5-pin S3 (Bu 1 . . . Bu 5).
The contact assignment is shown in Fig. 6.1. The Amphenol connection is
provided for a six-wire circuit. If the intention is to connect a six-wire circuit to
the pin terminals, connections C and F on the measuring amplifier must both
be connected to Bu3 on the calibration instrument, and connections B and G
must both be connected to Bu2.
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K3607
A0833-3.0 en/de HBM
3 Calibrating the measurement chain
•Connect the calibration instrument to the measurement chain you wish to
calibrate in place of the 350-ΩSG transducer. If there is an extension cable
on the measuring amplifier, leave it in place in order to capture the ohmic
and capacitive cable effects.
•Use S1 to preselect the desired polarity of the measurement signal.
•Set S2 (calibration step switch) to zero.
•If necessary switch the measuring amplifier to full bridge (K 3607 operates
as a full bridge).
•Balance the measuring amplifier and subsequent instruments to zero in
accordance with their operating manuals and if necessary carry out
capacitance adjustment.
•Use the calibration value switch S3 and the calibration step switch S2 to
set the desired calibration signal:
Calibration value in
mV/V
Calibration step*) in %
0 10 20 30 40 50 60 70 80 90 100
0.5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
1.0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
2.0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
5.0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
10.0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Tab 3.1: Calibration signal in mV/V as a function of the switch settings on the K3607
•Set the measuring amplifier to the desired output signal in accordance with
its operating manual. In principle the measuring amplifier should be
calibrated in the measuring range you intend to use for measurement. If the
measuring range of the amplifier is changed, the switching error needs to
be taken into consideration.
*) Effect of the calibration step switch (S2):
The grading error for the percentage steps as set out in the specifications will be maintained for every
step if the internal resistance Ri of the bridge excitation source plus cable is v1Ω. For an internal
resistance Ri v4Ωthe error in the calibration steps is kept at between 0 and 50 %.
For a six-wire circuit the tolerances are maintained if the excitation voltage to the K 3607 is readjusted
precisely enough.
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HBM A0833-3.0 en/de
4 Works calibration of the K3607
The K 3607 is calibrated in the factory under the following conditions:
−Ambient temperature: + 23 oC
−Connector cable:
Kab 0238A−3 (included in the list of components supplied), cable length =
3 meters
Cross-section of each bridge excitation wire 1.5mm2
−Internal excitation voltage resistance: v1Ω
5 Effect of cable resistance
The cable effect for KAB0238A-3 cable is calibrated in at the factory. This
applies to four- and six-wire circuit at the end of the 3-meter long cable.
On subsequent connection in four-wire circuit, the output signal is reduced by
the K factor due to the resistance of the excitation wires.
The K factor is calcultated as follows:
Bridge resistance)
The resistance value of an excitation wire is used for the r term. In the case of
KAB0238A-3 cable this resistance r = 0.0118 Ω. According to the formula (1)
this gives a value of 0.99993 for the K factor. This means an absolute
calibration error of 0.007% if KAB0238A-3 is not used.
A switching step error also occurs. Depending on the position of switch S2 the
internal resistance of the K 3607 alters slightly, as does the effective excitation
voltage due to the cable resistance r.
The grading error of the percentage steps increases by some 0.02% at 10 Ω
of cable conductor resistance.
When connecting a six-wire circuit the cable effect is corrected and the K
factor = 1. No additional grading error occurs (internal excitation voltage
resistance < 1 Ω).
If KAB0238A-3 cable is not used, an absolute calibration error of the
corresponding size occurs. This means the output signal is increased by a
factor of K = 1.00007.
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1
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