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20

ME 30

6

General Notes

6.1

Disturbances

Certain regulations concerning electrical installation have to be observed in
plants with strongly disturbed supply mains systems. The most important
points are listed up in the HBM leaflet ”Hints for connection/disturbances”. An
extensive summary is given in the installation regulations VDI/VDE 3551. The
extent of certain measures to be taken depends on the specific applications.

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Summary of Contents for ME30

Page 1: ...600 Hz Measuring Amplifier for strain gauge transducers measuring frequency 0 60 Hz ME30 Operating manual B 31 ME30 11 e ...

Page 2: ......

Page 3: ...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 Hazardou...

Page 4: ...g to the speci fications 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 instruc tions The ME30 complies with the state of the art and is operationally reliable If the device is used and operated inappropriately by...

Page 5: ...ddition de sign 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 symbo...

Page 6: ...e 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 ...

Page 7: ...aced 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 insta...

Page 8: ... 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 ...

Page 9: ...in 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 UB Bridge resistance Switch S25 2 5V RB 60 4000Ω 5V ex works setting...

Page 10: ... at a low value b unstabilized double pole supply voltage If a stabilized voltage is not available the amplifier can be operated by means of a stabilizer unstabilized supply or a DC DC converter single pole supply battery see chapter 5 1 and 5 2 2 3 Output output voltage 10V RL 5 kΩ operating voltage zero The output is provided for the connection of a display and or recorders A current output is p...

Page 11: ...ensing line gn 29c operating voltage zero 30c measuring signal wh 31c operating voltage zero ye 32c sensing line gy St 21 1a not occupied 2a not occupied 3a not occupied 4a DC DC converter positive pole 5a DC DC converter negative pole 6a not occupied 7a output Uadd 14 5 15 5V 50mA 8a not occupied 9a not occupied 10a not occupied 11a not occupied 12a not occupied 13a internally connected 14a inter...

Page 12: ...ridge Zero Balancing Carry out bridge zero balancing by means of the screwdriver potentiometers P23 fine and switches S22 coarse and S23 polarity See also chapter 4 4 3 3 MR Fine Adjustment The fine adjustment of the measuring range is made seperately for both ranges by means of the screwdriver potentiometers P21 measuring range 1 and P22 measuring range 2 The potentiometers in the front panel per...

Page 13: ...13 ME 30 P21 P22 ME30 S21 P23 S22 S23 Fig 3 1 Front view ME30 ...

Page 14: ...ied to the output This function enables amplifiers to be replaced in measuring chain without the need for rebalancing the bridge with the unloaded transducer All that is required is that the amplifier balance values are noted and then this value is set if necessary with P23 S22 and S23 4 2 Setting the Measuring Range Measuring range 1 is get ex works Measuring range 2 can be activated by switching...

Page 15: ...o x 0 90 1 28 o o o x o o x o 1 18 1 69 o o o x o o o x 1 56 2 23 o o o o x o x o MR 1 2mV V 2 07 2 94 o o o o x o o x 2 73 3 88 o o o o o x x o 3 61 5 13 o o o o o x o x o open x closed 4 3 External Fine Balancing of the MR1 Connections potentiometer pin 9c wiper pin 8c potentiometer finish pin 7c An external 5kΩ potentiometer can be connected for fine adjustment of the range This will enable abo...

Page 16: ...g A balance range of 0 12mV V set by the manufacturer can be passed with an externally connected potentiometer of 50 kΩ Pin assignment potentiometer pin 26c wiper pin 21c potentiometer finish pin 24c 4 5 Calibration signal Switching switch S21 to the right calibration detunes the amplifier by a de fined amount 1mV V The measuring range can be adjusted without hav ing to load the connected transduc...

Page 17: ... ex works setting fco 80Hz 3dB 0 2Hz 1dB fco 2 5Hz 3dB 4 7 Synchronization When operating several ME30 amplifiers in a common housing one of them has to be switched as the master the carrier frequency of which supplies the clock pulses the others are to be switched as slave Pins 11c of all amplifiers have to be joined for synchronization The master amplifier is selected by switch S28 Synchronizati...

Page 18: ...pole pin 16a supply zero pin 19c 5 2 DC DC Converter The manufacturer can mount a DC DC converter onto the board for the oper ation of a single pole supply voltage battery The voltage converter is suit able for operation on 9 35V unstabilized Pin assignment positive pole pin 4a negative pole pin 5a The DC DC converter decouples the internal operating voltages from the sup ply voltage When using th...

Page 19: ...igned to each other The required fine calibration can be carried out from the front panel as described in chapter 3 5 4 Safety Barriers for use in Hazardous Areas For transducer operation in potentially explosive atmospheres the safety barri ers SD01 are used conforming to the protection classes EEx ib IIC accord ing to VDE0171 EN 50 014 and EN 50 020 see data sheet 5 5 Additional Units The follow...

Page 20: ...bserved in plants with strongly disturbed supply mains systems The most important points are listed up in the HBM leaflet Hints for connection disturbances An extensive summary is given in the installation regulations VDI VDE 3551 The extent of certain measures to be taken depends on the specific applications ...

Page 21: ...V 0 2 Calibration signal mV V 1 0 1 Bridge balance range coarse balance adjustable in 16 steps and polarity mV V 2 fine balance with screwdriver potentiometer mV V 0 08 Measuring frequency Butterworth low pass 3rd order switchable at 1dB Hz 0 2 0 60 at 3dB Hz 2 5 80 phase delay ms 135 4 8 rise time ms 170 7 surge voltage overshoot 10 10 residual carrier 0 1 0 2 typ 0 1 Input symmetrical input resi...

Page 22: ... Operating temperature range C 20 60 Storage temperature range C 25 70 Stabilized Voltage for the operation of additional units V 15 max power consumption mA 50 Supply current standard stab KM001 DC DC converter Supply voltage V 14 5 15 5 15 6 25 9 35 max current consumption without additional units mA 70 65 80 70 340 140 influence of supply voltage for changes in the relevant range the measuring ...

Page 23: ...23 ME 30 8 Component Layout ...

Page 24: ...24 ME 30 9 Copy of Declaration of Conformity ...

Page 25: ...25 ME 30 ...

Page 26: ...26 ME 30 ...

Page 27: ...27 ME 30 ...

Page 28: ...iefen See 45 D 64293 Darmstadt Tel 49 61 51 8 03 0 Fax 49 61 51 89 48 96 www hbm de e mail TSC hottinger baldwin com Modifications reserved All details describe our products in general form only They are not to be understood as express warranty and do not constitute any liability whatsoever IM D 09 99 POD ...

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