HBM ME30 Operating Manual
600 Hz Measuring Amplifier
for strain gauge transducers
measuring frequency 0...60 Hz
ME30
Operating manual
B 31.ME30.11 e
3
ME 30
Contents Page
Safety instructions 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Measuring Amplifiers on Eurocards ME30 8. . . . . . . . . . . . . . . . . . . . . . . .
2 Electrical Connection 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Transducer Connection 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Supply Voltage 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Output 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Supply Voltage for Additional Units 10. . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Pin Assignment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Putting into Operation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Select Measuring Range 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Bridge Zero Balancing 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 MR Fine Adjustment 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Individual Settings 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Operational Setting 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Setting the Measuring Range 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 External Fine Balancing of the MR1 15. . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Bridge Fine Balancing 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 Calibration signal 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 Measuring Frequency Range / Cut-off Frequency fco 17. . . . . . . . . . .
4.7 Synchronization 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Options 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Stabilized Power Supply 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 DC-DC Converter 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Current Output Module 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Safety Barriers for use in Hazardous Areas 19. . . . . . . . . . . . . . . . . . .
5.5 Additional Units 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 General Notes 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Disturbances 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Technical Data 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Component Layout 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Copy of Declaration of Conformity 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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ME 30
Safety instructions
In order to ensure sufficient immunity from disturbance only use Greenline
shielding (see HBM’s special publication ”Greenline” Screening Concept, electromagnetic compatibility of measuring cable, G36.35.0)
The connection lines’ ( ≤ 50V) minimum insulation strength must be
350V(AC).
Appropriate use
The ME30 with the connected transducers may be used for measurement and
directly related control and regulation tasks, only. Any other use is not appropriate.
To ensure safe operation, the ME30 may only be used according to the specifications given in this manual. When using the transducer, the legal and safety
regulations for the respective application must also be observed. The same
applies if accessories are used.
General dangers in the case of non-observance of the safety instructions
The ME30 complies with the state of the art and is operationally reliable. If the
device is used and operated inappropriately by untrained personnel, residual
dangers might develop.
Any person charged with device installation, operation, maintenance or repair
must in any case have read and understood the operating manual and the
safety instructions, in particular.
Conditions on site
Protect the device from moisture or atmospheric influences such as rain,
snow, etc.
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ME 30
Maintenance and cleaning
The Clip Electronic are maintenance-free. Please note the following points
when cleaning the front panel:
• Remove the mains plug from the socket before cleaning.
• Clean the front panel with a soft, slightly damp (not wet!) cloth. Never use
solvents, since they may damage the labelling on the front panel.
• When cleaning, please ensure that no liquid finds its way into the device or
onto the contacts.
Residual dangers
The ME30 scope of performance and supply covers part of the measuringtechnology, only. The plant designer/constructor/operator must in addition design, realise and take responsibility for the measuring-system’s safety such
that potential residual dangers are minimized. The respective regulations
must in any case be observed. Residual dangers regarding the measuring
system must be specified explicitly.
If there is any risk of remaining dangers when working with the, it is pointed
out in this introduction by means of the following symbols:
Symbol:
DANGER
Meaning:
Maximum danger level
Warns of a decidedly dangerous situation in which failure to comply with
safety requirements can lead to death or serious physical injury.
Symbol: WARNING
Meaning:
Possibly dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements can lead to death or serious physical injury.
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ME 30
Symbol:
CAUTION
Meaning:
Dangerous situation
Warns of a possibly dangerous situation in which failure to comply with safety
requirements can cause damage to property or lead to 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 is a guarantee by the manufacturer that his product meets the
requirements of the relevant EG Directives (see declaration of conformity at
the end of these operating instructions).
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ME 30
Safe operation
Do only quit error messages if the reason for the error has been eliminated
and there is no more danger.
Reconstruction and modifications
HBM’s express consent is required for modifications regarding the ME30
construction and safety. HBM does not take responsibility for damage resulting from unauthorized modifications.
In particular, repair and soldering works on the boards are prohibited. If complete componentry is replaced use original HBM components, only.
Qualified personnel
The device may be used by qualified personnel, only; the technical data and
the special safety regulations must in any case be observed. When using the
device, the legal and safety regulations for the respective application must
also be observed. The same applies if accessories are used.
Qualified personnel means: personnel familiar with the installation, mounting,
start-up and operation of the product, and trained according to their job.
Maintenance and repair work on an open device with the power on should
only be undertaken by trained personnel who are aware of the above-mentioned dangers.
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ME 30
1 Measuring Amplifiers on Eurocards ME30
The Eurocards ME30 is a 600 Hz carrier frequency amplifiers for strain gauge
transducers. An aluminium front panel (4 divs. wide) is delivered as standard.
Aplasticcs handle can be mounted instead of it if ordered separately.
All plug-in cards are delivered without housing without power supply unit so
that a 19” rack frame can be set up as required. Owing to the narrow width of
the plug-in cards (4 divs = 20.32mm) up to 21 cards can be inserted into a 19”
rack. The dimensions and connecting details correspond to the IEC standards
48D and 297.
All controls are accessible from the front.
Individual adjustments are described in chapter four; ex-works settings are
specified on the back of the Eurocard.
Notes for the diagram on the
right
S21:
calibration – measuring – zero
S22/23:
zero balancing (coarse)
S24/1+2:
MR1 fine balancing
internal/external
S24/3:
switch for measuring frequency
range 60Hz to 2Hz
S24/4:
MR changeover from MR1 to
MR2
S25:
switching the bridge excitation
voltage
S26/27:
setting of measuring range
(coarse)
P21/22:
fine balancing of MR
P23:
zero balancing (fine)
Cal. +1mV/V
zero
MR1
fine balancing
external
5kΩ
50kΩ
zero balancing
external
zero
calibr.
MR1–2
wh
gy
bk
bu
gn
14.5...15.5V <50mA
14.5...15.5V <50mA
–
+ 9V...+35V
(opt. DC/DC converter)
U
B
+14.5...+15.5V
UB –14.5...–15.5V
U
a
10V >5kOhm
option Ia 20mA
2.33V
ss
synchr.-voltage
or synchr. input
+
–
Fig. 1.1: Block diagram
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ME 30
2 Electrical Connection
2.1 Transducer Connection
Strain gauge transducers are connected by means of 6-wire circuits.
With transducers in 4-wire technology the sensing leads are not needed. In
this case the contacts 32a+c and 28a+c on the connector must be linked.
screen pins 31a+c. . . . . . . . . . . . . . . . . .
rd
gy
bk
wh
bu
gn
ye
measuring signal (–) pin 30a. . . . . .
sensing line to 32a (–) pin 32c. . . . .
bridge supply voltage (–) pin 32a. .
measuring signal (+) pin 30c. . . . . .
bridge supply voltage (+) pin 28a. .
sensing line to 28c (+) pin 28c. . . . .
contact
(alternatively 29a+c)
Fig. 2.1: Bridge connection
The required bridge excitation voltage set by the factory is 5V(symmetrical
about ground). It can be switched to 2.5V by switch S25.
U
B
Bridge resistance Switch S25
2.5V R
B
≥60...4000Ω
5V
(ex-works settings)
R
B
≥110...4000Ω
The safety barriers SD01 must be wired into the connecting lines (see chapter 5.4) for transducers in EEx(i) design.
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