HBM ME50S6 Operating Manual

Operating manual

4.8 kHz CF Measuring
Amplifier

ME50S6

A0260-1.1 en

ME50S6

3

Contents Page

Safety instructions 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Measuring Amplifiers on Eurocards ME50S6 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 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.5 Calibration Signal 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.6 Measuring Frequency Range / Cut-off Frequency fco 16 . . . . .

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 . . . . . . . . . . . . . . . . . . . . . . . . . .

HBMA0260-1.1 en

4

ME50S6

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’ ( ≤ 50 V) minimum insulation strength must be
350 V (AC).

Appropriate use

The ME50S6 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 ME50S6 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 ME50S6 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.

HBM A0260-1.1 en

ME50S6

5

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 ME50S6 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.

HBMA0260-1.1 en

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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:

ME50S6

Symbol:
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:
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.

Symbol:
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.

DANGER

WARNING

CAUTION

Symbols indicating application notes and useful information:

Symbol:
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).

NOTE

HBM A0260-1.1 en

ME50S6

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 ME50S6
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.

7

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.

HBMA0260-1.1 en

8

ME50S6

1 Measuring Amplifiers on Eurocards ME50S6

The Eurocards ME50S6 are 4.8KHz carrier frequency measuring amplifiers
for strain gauge transducers.

All plug-in cards are delivered without housing or rack frame and without
power supply unit so that an individual setting in an existing 19” rack mounting
system is possible. 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 necessary for easy operation are accessible from the front.
Individual adjustments are described in chapter four; ex-works settings are

specified on the back of the Eurocard.

St 21

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 60 Hz to 2 Hz

S24/4:

MR changeover from MR1 to
MR2

S25:

alteration to bridge supply vol­tage

S26/27:

setting of measuring range
(coarse)

P21/22:

fine balancing of MR

P23:

zero balancing (fine)

S26/27 S22/23

P23

Cal. 1mV/V
zero



0..250Hz

0..40Hz

S24/3

S21

G



4.8kHz

S25

5V/1V

P21/22

S24/4

S24/1+2

1c
7c
8c
9c
26c
21c
24c
21a
25a
25c
30c
30a

32c
32a
28a
28c

31a+c
6c
7a
15c
4a
5a
15a
16a
19c
18c
19a
20a
11c

5kOhm

50kOhm

wh

rd
gy

bk
bu

gn

chassis

MR1
fine balancing
external

zero balancing
external

zero
calibr.
MR1−2

+14.5...15.5V

−14.5...15.5V

option DC/DC-con-

+

verter

−

Ub +14.5...+15.5V
Ub −14.5...−15.5V

Ua ±10V >5kOhm
option Ia ±20mA

2.33V synchr.-vol­tage
or synchr. input

Fig. 1.1: Block diagram

HBM A0260-1.1 en

ME50S6

2 Electrical Connection

2.1 Transducer Connection

Strain gauge transducers are connected by means of 6-wire circuits.

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contact

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 28a (+) pin 28c. . . .

screen pins 31a+c. . . . . . . . . . . . . . . . . .

rd

gy

bk

wh

bu

gn

ye

(alternatively 29a+c)

Fig. 2.1: Bridge connection

The required bridge supply voltage is 5 V(symmetrical about ground) as set
ex-works. It can be reduced to 1.0 V by switch S25.

U

B

5 V

(ex-works setting)

1 V

Bridge resistance Switch S25

R

≥110...4000 Ω

B

R

≥60...4000 Ω

B

The safety barriers SD01 must be wired into the connecting lines (see chapter

5.4) for transducers in EEx(i) design.

HBMA0260-1.1 en