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M1000 Series Signal Conditioning System User Guide

1. 0000000 00000000 Figure 3 1 M1000 6 Voltage and Galvo Output Connectors 4 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Set up NPUTS 4 OUTPUTS VOLTAGE CH 1 12 1 ve supply 2 ve supply 3 spare 4 input Lo 5input Hi AQ A7 6 nput A 7 screer 00002a00 o o CURRENT CH 1 6 00002a00 o o CURRENT CH 7 12 0090009000 o o VOLTAGE SELECTOR 220 240V 110 120v SET VOLTAGE BEFORE INSERTING POWER CONNECTOR A C POWER IN D C FUSE 5A SLO BLO A C FUSE S00mA SLO BLO Micro Movements Ltd s ries Amplifier System Serial No Made in England 1996 0000000 00000000 CH 12 HI CH 11 HI CH 10 HI CH 9 HI CH 8 HI CH 7 HI CH 11 CH9 CH7 CH5 CH3 CH1 00000000 Figure 3 2 M1000 12 Voltage and Current Output Connectors Micro Movements Ltd Common Set up M1000 Series Signal Conditioning System User Guide 8 INPUTS 5 2 OPUS VOLTAGE SELECTOR Saeeee re Pet Fa pce eae Oooo 1 ve supply 2 ve supply 3 spare g ORNAR DE input Hi an A saome SLO BLO Micro Movements Ltd Made in England M1000 Series Amplifier System Serial No DS I LI POWER CONNECTOR A C POWER IN aaaoanoanaoa
2. Figure 2 C103 C104 Side View 1996 Micro Movements Ltd 3 C103 C104 High Voltage Connectors 4 1996 Micro Movements Ltd C1061 Series Thermocouple Reference Junction Connector 2 1996 Micro Movements Ltd CN A Current Shunt Connectors C103 C104 HIGH VOLTAGE CONNECTORS 1 Description The CN A series are current shunt connectors for use with signal conditioning amplifier modules The CN A contains a very low resistance non inductively wound copper wire with voltage take off points fed to the 7 pin DIN connector The value of the shunt resistance provides for an insertion voltage drop of 50mV at maxiomum rated current There are three model allowing for maximum currents of 10Amp 5Amp and 1Amp They can be used with the Mxx60 and Mxx70 amplifiers and are suitable for AC and DC current measurements 1 1 Shunt Values C10 A 10 amps 50mV drop at 10 amps CS A 5 amps 50mV drop at 5 amps C1 A 1 amp 50mV drop at 1 amp 1 2 Installation Incoming lead 1 Not connected 2 Earth 3 Input High 4 Input Low THIS CONNECTOR MUST BE EARTHED TO PIN 2 OF INPUT CONNECTOR AND CONNECTOR SHELL 2 1996 Micro Movements Ltd CN A Current Shunt Connectors 4 1996 Micro Movements Ltd M1043 Synchro D C Converter M1043 SYNCHRO D C CONVERTER CONTENTS 1 Description 2 2 Front Panel Controls 2 2 1 Shift 3 2 2 Tape 3 2 3 Sector 3 2 4 Gain 3 3 Specification 4 4 Typical Input Circuits 4 5
3. Micro Movements Ltd M1070 Attenuator Amplifier 1 2 Note 3 4 5 6 7 8 Use the Calibrate FINE potentiometer to set the Cal voltage to 1 000 volts on the monitor Recorders only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale If all channels are not in use it is preferable to use the centre channels for the best optical fidelity e g Channels 3 through to 7 Set the Galvo ON OFF switch to ON This switch provides power to the amplifiers Set the Calibrate OFF switch to OFF Set the Monitor CH No CAL switch to CH No Set the Monitor 1 999 19 99 switch to 19 99 Adjust the SHIFT potentiometer on the amplifier to give 0 00V on the monitor Observe the galvo it should correspond to the position set in 2 i e 11 If there is a discrepancy recheck the procedure as either the amplifier is faulty or there has been a wrong setting Set the Calibrate OFF switch to For recorders use the FINE gain control on the amplifier to set the galvo spot to position 1 i e a deflection of 10cm from 11 Use the TAPE potentiometer on the amplifier to set the monitor voltage to 2 00 volts At this stage the system has been calibrated for a sensitivity of 10cm volt on the recorder and 2 00 volts volt on the voltage output Set the Calibrate OFF swtich to OFF If there has been a change from the original setting of 11 on the chart sca
4. Special plug in card that translates the normal 0 10v signal or optionally the 10 to 10 into a 4 to 20 milliamp signal which is available on the Galvo output connector at the rear of the housing 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Set up SECTION 3 SET UP 3 1 Installation The M1000 Series Signal Conditioning System cabinets are portable and therefore not dedicated to one installation point During use there are some simple precautions to follow if the system is to operate safely and correctly a Supply voltage Before connecting the cabinet to the power supply check that the voltage has been set to the correct position for the local supply voltage and that the appropriate fuse has been fitted The supply voltage is selected by means of a rotary switch located on the rear panel of the cabinet b The top cover should not be removed except by qualified personnel c It is essential that the air vents around the cabinet are not blocked while it is in operation as adequate ventilation is required to prevent overheating The following items are supplied with each cabinet 1 Mains power lead with moulded socket 1 x 7 pin locking DIN connector One further connector is supplied with each signal conditioning amplifier ordered with the mainframe e 1 set of manuals 1996 Micro Movements Ltd 1 Set up M1000 Series Signal Conditioning System User Guide 3 2 Preparing for
5. The amplifier has a separate buffered voltage output which appears on the Voltage Output socket on the rear of the instrument The nominal output level with a 10cm deflection on the galvanometer can be adjusted by means of the potentiometer marked Tape up to 2V DC Micro Movements Ltd 5 M1060 High Gain Amplifier Input Mode Input Range Maximum Input Common Mode Rejection Noise Drift Bandwidth Gain Output Voltage Output impedance Voltage Output Current Output Impedance Current Package Typical Input Circuits Strain Gauge 1 4 Bridge 1 1 6 Specification Input Configuration High Gain Differential Input Impedance 1 Megohm Differential 1 Resistive bridge in 1 2 or 4 arm connection with internal bridge completion 2 Low level signals generally Up to 500 mV approx 30V D C 90dB D C to 60 Hz Less than 5 microvolts r m s r t i at max gain Less than 2 microvolts C r t i at max gain D C 5KHz 20 5 000 in switched steps with interpolate control Upto 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Standard M1000 series module Strain Gauge Full Bridge Figure 2 Strain Gauge 1996 Micro Movements Ltd 1996 mi Q m 2 m i3 4 s M5 16 Figure 3 Analogue Signals m t D 7 N C104 Earth gis Figure 4 High Voltage Calibration M1
6. This is a 15 turn potentiometer which functions as a bridge balance or input offset control Its range is approximately 20mV at the input terminals 4000 microstrain at 10V bridge excitation This control is disabled when in the CAL mode Span Tape The amplifier span gain is set by two controls coarse and fine which cover the approximate range 0 5 to 1000 The additional buffered voltage outpput provides an additional gain of up to 2 Coarse Gain The Coarse Gain control is a 10 position rotary switch calibrated such that in each successive position the gain is halved The gain settings are shown including the additional buffered voltage output which incorporates a 2 1 adjustment on the fine gain and a 2 1 adjustment on the tape control The full range is as follows Position Max Gain Min Gain 0 2000 500 1 1000 250 2 500 125 3 250 62 4 125 31 5 62 16 6 31 8 7 16 4 8 8 2 9 4 1 Maximum Dynamic range Volt at input Fine Gain The Fine Gain control is a 15 turn potentiometer which interpolates the gain steps so that the gain is continuously variable over the switched range The control gives a 2 1 adjustment and is effective for the complete amplifier that is both the galvo output and the voltage output 1996 Micro Movements Ltd 3 M1064 High Gain Amplifier 2 4 3 1 3 2 A separate amplifier is incorporated to give a buffered voltage output from the unit to drive oscilloscopes tape recorders
7. N Corresponding to channel being calibrated Note This feature is not fitted to M1000 6 1 Using the Calibrate FINE potentiometer set the voltage on the Monitor to 4 17V 2 Turn Calibrate RANGE to 100mV There will now be 41 7mV on the mainframe calibration bus 3 Recorders only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale Note If all channels are not in use it is preferable to use the centre channels for the best optical fidelity 4 Galvo ON OFF switch to ON This switch provides power to the amplifiers Calibrate OFF switch to OFF Monitor CH No CAL switch to CH No 5 You should read 0 00V on the monitor For recorders also observe the galvo spot it should correspond to the position set in 3 i e 11 If there is a discrepancy recheck as either the amplifier is faulty or there has been a 10 1996 Micro Movements Ltd 6 7 8 9 10 11 Note M1064 High Gain Amplifier wrong setting Calibrate OFF switch to For recorders adjust the spot deflection to 7 5cm using the FINE gain control on the amplifier For amplifier housings only adjust the fine control fully clockwise Using the TAPE potentiometer on the amplifier set the monitor voltage to a suitable value e g 2 00V At this stage the system has been calibrated for a sensitivity of 1cm 10 PSI on the recorder and a voltage output of 200mV per 10
8. for calibration of M1080 M1090 Series Filters A range of filters is available from 2 to 6 pole with Butterworth Bessel or Chebyshev characteristic 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Description 2 5 1996 Micro Movements Ltd Output Conditioning Modules The M1000 12 P 16 P 24 P instruments are provided with an Output Conditioning Stage which is accessible through the hatch at the top of the unit If this section is not used the connections are normally linked through with M1088 P Channel Completion Cards The links are 9 10 Output Common 7 12 Voltage Output 8 11 Current Output A number of output conditioning units are available M1072 P Power Output Amplifier Current Output A power amplifier option is available with the following possible outputs Current Output 10mA into 500 ohms max Galvo Drive Amplifier 50mA into 42 ohms max M1090 Active Filters Low Pass Active Filters are available The type numbers of the filters are given as follows M1090 02 2 pole Low pass M1090 04 4 pole Low pass M1090 06 6 pole Low pass M1090 04 2 4 pole Low pass 2 selectable cut off frequencies M1090 04 3 4 pole Low pass 3 selectable cut off frequencies Cut off frequency 3dB Note On the 04 2 and 04 3 selectable frequency versions the maximum range of frequencies on any individual PCB is 20 1 Normally filters are supplied with Butte
9. 1 Sinewave from impeller flowmeters RPM pick ups etc 2 Square wave TTL 10mV to 100V r m s 100V r m s up to 250V r m s with C104 adaptor 0 01 C Referred to Output 1Hz to 10Hz Off 10kHz 2kHz 500Hz 100Hz with interpolate control Upto 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms From 5 mS to 7 5S See Filter Time Constant Table 10mA on current output Standard M1000 series module 1996 Micro Movements Ltd M1080 Frequency D C Converter 8 Typical Input Circuits m1 Figure 2 Impeller Flowmeter m gt mm 12 i mm 3 mw 4 D mm 16 7 R P M Pick Up Magnetic Figure 3 R P M Pick up m 3 nrm 5 Figure 4 Analogue Signals 1 4 f 2 i m 3 O mm 4 Earth 3 i im i mm 16 m 7 Figure 5 High Voltage 1996 Micro Movements Ltd M1080 Frequency D C Converter 9 Calibration To achieve accurate calibration an M1085 Frequency Calibrator must be used 9 1 Calibration Procedure The module is to be calibrated to give 10cm deflection corresponding to a flow rate of 100 gallons minute A voltage output of 2 00 volts is required for the same scale An impeller flowmeter is used with a calibration factor of 1105Hz for 125gpm The corresponding frequency for 100gpm 100 125 x 1105 884Hz The nearest calibration frequenc
10. 21 0 Table 1 Thermocouple types referenced to 0 C millivolts 10 1996 Micro Movements Ltd M1064 High Gain Amplifier M1064 HIGH GAIN AMPLIFIER CONTENTS 1 Description 2 Front Panel Controls 1996 Micro Movements Ltd 2 1 Zero 2 2 Span 2 3 Tape 2 4 Mode Internal controls 3 1 Bridge Completion 3 2 Low Noise Operation Sensor Excitation 4 1 Transducer Supply 4 2 Zero Balance Range Voltage Output Range Specification Typical Input Circuits Calibration 8 1 Calibration Procedure n nn un un A A bh RW WwW N M1064 High Gain Amplifier M1064 HIGH GAIN AMPLIFIER 1 Description M1064 is a differential input instrumentation amplifier featuring a wide bandwidth It is designed for use with most types of low level sensors strain gauges in 1 2 or 4 active arm configurations bonded and unbonded strain gauge transducers load cells and other sensing devices It accepts a full range of inputs from ImV to 1 0 V and provides gains of up to 2000 The module features an output suitable to drive galvanometers and a seperately buffered voltage output to drive tape recorders oscilloscopes loggers and data acquisition systems 2 Front Panel Controls Zero 6 J 7 a 1 Span Coarse Gain FINE GAIN run MODE Mode Span Fine Gain Tape Figure 1 M1064 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 Zero M1064 High Gain Amplifier
11. C RTI Type J thermocouple Iron Constantan Positive Iron Negative Constantan Pole 3 Closed Enables other sensitivities of thermocouple to be compensated A resistor may be fitted by the user to provide the desired compensation rate The value of this resistor may be determined from the formula below R37 1224 Vth 12 kohms where Vth is the thermocouple sensitivity in wV C 1996 Micro Movements Ltd 4 1996 Specification Input Configuration Input Impedance Input Mode Input Range Maximum Input Common Mode Rejection Noise Drift Bandwidth Gain Output Voltage Output impedance Voltage Output Current Output Impedance Current Package Micro Movements Ltd M1061 Thermocouple Amplifier High Gain Differential 200 Kohm Differential 1 Any type of thermocouple with or without C1061 R electronic reference module 2 Low level low frequency signals generally Up to 100 mV 12V D C 90dB D C to 60 Hz Less than 5 microvolts r m s r t i at max gain Less than 2 microvolts C r t 1 at max gain D C 1KHz 25 10 000 in 5 switched steps with interpolate control Upto 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Standard M1000 series module M1061 Thermocouple Amplifier 5 Typical Input Circuits mm 2 mm 3 ms 4 lt O h 15 mm 6 gm 7 Figure 2 Thermocouple m1
12. Poles 1 2 and 3 are Closed Note that closing Pole 3 brings in R26 which is normally 350 ohms If the resistance of the single external bridge arm is different from this value R26 must be changed to match it See also Typical Input Circuits Low Noise Operation 1996 Micro Movements Ltd 4 1 4 2 M1064 High Gain Amplifier To minimise output noise at high gains a low pass filter can be switched in by closing Poles 4 and 5 of SW2 This has the effect of reducing the bandwidth to approximately 9KHz Sensor Excitation Transducer Supply The 3 12V DC transducer supply is generated by the mainframe and appears on pins 1 and 2 of the amplifier These are connected via R29 and R30 to pins 3 and 4 which in turn are connected to pins and 2 on the 7 pin Signal Input Connector at the rear of the instrument Thus the transducer cannot be energised unless there is an amplifier present in that particular channel Note that the amplifier is normally supplied with R1 and R2 replaced by wire links so that the full supply 3 12V DC as selected by the Bridge Volts switch appears across the transducer However if a reduced supply is required on a particular channel these may be replaced by resistors of the appropriate value to act as droppers in the supply lines For example With 10V excitation selected a particular strain gauge is required to be energised with 2 5V Bridge resistance 350 ohms Bridge excitation 2 5V Volt d
13. x2 x4 x8 with interpolate control 0 45 Up to 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Double width M1000 series module 1996 Micro Movements Ltd 1996 Typical Input Circuits M1043 Synchro D C Converter REF Figure 2 Synchro Transmitter Figure 3 Resolver IMPORTANT The typical inputs shown are for direct input Many applications require isolation in the form of transformer coupling for resolvers or Scott connected transformers for Synchro input Any isolating transformer configuration will be external to the instrument These can be supplied by Micro Movements Details are available on request Micro Movements Ltd M1043 Synchro D C Converter 6 1996 Micro Movements Ltd M1049 Carrier Oscillator Amplifier and Demodulator M1049 CARRIER MODULE 1 Description The M1049 is a self contained carrier oscillator amplifier demodulator and filter which is primarily intended for operation with inductive transducers in half or full bridge configuration e g variable reluctance transducers differential transformers LVDTs etc Features include low noise and high bandwidth for this type of system full input protection up to 30V wide dynamic range and galvanometer protection by output current limiting 2 Front Panel Controls SHIFT Shift Span Coarse Gain Span Fine Gain ae r
14. 1 2 2 2 3 2 4 1996 M1073 R M S D C Converter This is a 22 turn potentiometer which acts as a back off or input offset control enabling the output to be shifted over plus and minus full scale on the chart Volts The gain attenuation range of the amplifier is set by two controls coarse and fine which cover the range 10mV to 100V r m s Coarse The coarse control is a 5 position switch calibrated directly in volts Indicated Range Typical input voltage range for 5cm deflection with M1600 type galvanometer Max fine control Min fine control fully counter clockwise fully clockwise 0 01V 45mV 4mV 0 1V 450mV 40mV 1V 4 5V 400mV 100V 40V The input voltage cannot exceed 125V r m s It is however often necessary to reduce the deflection to less than full scale for the maximum of 125V r m s See High Voltage Operation Fine The fine interpolation control covers a 10 1 range Tape A separate amplifier is incorporated to give a buffered voltage output from the unit to drive oscilloscopes tape recorders etc via the Voltage Outputs connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the front panel to give up to 2V DC output Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 a
15. 4 which in turn are connected to pins and 2 on the 7 pin Signal Input Connector at the rear of the instrument Thus the transducer cannot be energised unless there is an amplifier present in that particular channel Note that the amplifier is normally supplied with R1 and R2 replaced by wire links so that the full supply 3 12V DC as selected by the Bridge Volts switch appears across the transducer However if a reduced supply is required on a particular channel these may be replaced by resistors of the appropriate value to act as droppers in the supply lines For example With 10V excitation selected a particular strain gauge is required to be energised with 2 5V Bridge resistance 120 ohms Bridge excitation 2 5V Volt drop required 7 5V Therefore R1 R2 120x7 5 2 5 360 ohms So R1 and R2 are 180 ohms each Provision is also made to route out the amplifier power supply rails by selection of links B on the board These connect the 12V rail to pin 3 the OV rail to pin 9 and the 12V rail to pin 4 These in turn are connected to the Signal Input connector on pins 1 6 and 2 respectively Amplifiers supplied from the factory with this connection are designated M1070 S11 and are marked with two brown dots on the handle 4 2 Zero Balance Range Bridge balance is set by a 22 turn potentiometer which has a nominal range of 20mV at the input 4000 microstrain for 10V bridge excitation For transducers with a very larg
16. Amplifier M1079 ISOLATED ATTENUATOR AMPLIFIER CONTENTS 1 Description 2 2 Front Panel Controls 2 2 1 Shift 3 2 2 Range 3 2 3 Tape 3 2 4 Mode 3 3 Internal controls 4 4 Sensor Excitation 4 4 1 Transducer Supply 4 4 2 Zero Balance Range 4 5 High Voltage Operation 4 6 Specification 4 7 Typical Input Circuits 5 8 Calibration 6 8 1 Calibration Procedure T 1996 Micro Movements Ltd 1 M1079 Isolated Attenuator Amplifier M1079 ATTENUATOR AMPLIFIER 1 Description The M1079 is a general purpose isolated attenuator amplifier module for operation with voltage inputs in the range 10mV to 100V For high voltage measurements a special attenuator plug is available see documentation on C103 and C104 High Voltage Connector Features include high input impedance low noise and drift with galvanic isolation on the inputs 2 Front Panel Controls Shift Range Coarse Range Fine Tape Mode Figure 1 M1079 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 2 4 1996 M1079 Isolated Attenuator Amplifier This is a 22 turn potentiometer which acts as a back off or input offset control enabling the output to be shifted over plus and minus full scale Range The gain attenuation range of the amplifier is set by two controls coarse and fine which cover the range divide by 100 to multiplied by 100 Coarse Gain The coarse control is a 5 position rotary swit
17. B 2 7 1 a Mu UIDOG 16 Micro Movements Ltd Figure 2 1 M1000 6 M1000 12 and M1000 16 Front Panels 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Description 2 1 2 2 2 1996 Signal Conditioning Standard plug in modules are available to condition Pressure Temperature Acceleration and Flow transducers etc Also available is a wide range of modules that have been designed for special customer requirements see section 2 4 Applications The cabinets have been designed to be used as stand alone units In this mode they are used to drive tape recorders data loggers computers or other data storage equipment The cabinets also have facilities to drive Micro Movements M300H Lightbeam Recorders and all the matching circuits for the galvanometers are included in the modules Direct interconnection cables are available from the M1000 to the M300H recorder The M1000 series housings have been particularly designed to interface with DATA ACQUISITION SYSTEMS The voltage output connector on the rear of the housing can be connected directly to a PC based data acquisition card either ISA or PCMCIA Micro Movements can provide complete data acquisition systems or advice on integration with an existing system M1000 HOUSING Micro Movements Ltd 3 Description M1000 Series Signal Conditioning System User Guide 2
18. Input Circuits 6 6 Calibration 7 6 1 Calibration Procedure 8 1996 Micro Movements Ltd 1 M1061 Thermocouple Amplifier M1061 THERMOCOUPLE AMPLIFIER 1 Description M1061 is a high gain amplifier for use with thermocouples and similar low level sources A special input connector type C1061 R with a built in cold junction reference is available for use with this module Features include high input impedance low noise and drift and input protection up to 12V across the input terminals 2 Front Panel Controls OFFSET mVisd Offset 39 D 3 OH mV f s d Coarse Gain mV f s d Fine Gain Tape LL Mode Figure 1 M1061 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 2 4 1996 M1061 Thermocouple Amplifier Offset A 22 turn potentiometer which acts as a back off or input offset control enabling the output to be shifted over plus and minus full scale range mV f s d The amplifier gain is set by two controls coarse and fine Coarse Gain The Coarse Gain control is a rotary switch calibrated in input millivolts for full scale output in the following steps 100mV 30mV 10mV 3mV ImV Fine Gain The Fine Gain control is a 15 turn potentiometer which interpolates the gain steps so that the gain is continuously variable over the switched range Tape A separate amplifier is incorporated to give a buffere
19. for all the transducers Configuration switches e g full half or quarter bridge Individual gain and balance controls A digital monitor with channel selector An accurate calibration facility Signal Conditioning Cabinets Four cabinets types are available M1000 6 The M1000 6 is a self contained compact unit primarily intended for mobile applications It can house up to 6 channels of Micro Movements Signal Conditioning Amplifiers M1000 12 The M1000 12 has similar facilities as the M1000 6 but with a maximum channel capacity of 12 The M1000 12 P is similar but also has a post conditioning facility 1 e filter power amplifiers etc can be plugged into the top of the cabinet M1000 16 The M1000 16 and 16 P have similar facilities to the M1000 12 and 12 P respectively but with a maximum channel capacity of 16 M1000 24 The M1000 24 and 24 P have similar facilities to the M1000 16 and 16 P respectively but with a maximum channel capacity of 24 Micro Movements Ltd 1 Description M1000 Series Signal Conditioning System User Guide CH ie L 1999 POWER MONITOR Q 4998 OFF Galva 1 BRIDGE CALIBRATE CHANNEL ONC OFF wu M1000 24 0 Micra Movements Ltd MONITOR L Ono BRIDGE CALIBRATE CHANNEL NG oFF valts tine 1 8 9 16 3
20. mm 2 mm 3 TT C1061R m 4 QU im 5 i mm 6 mm 7 Figure 3 Thermocouple Reference Junction my mi 2 ma 3 aa a 2 14 A 5 i mm 6 S Figure 4 Analogue Signals 1996 Micro Movements Ltd M1061 Thermocouple Amplifier 6 Calibration A true calibration of any system can only be achieved by applying a known physical stimulus to the sensor for example if the sensor is a pressure transducer by the use of a deadweight tester or in the case of a load cell by applying known weights etc The M1016 calibrator works by removing the output connections from the transducer and injecting a known DC voltage into the amplifier input which corresponds to the signal produced by the transducer for a given stimulus this being determined by reference to the manufacturers test certificate for that transducer Confusion is sometimes caused during the calibration procedure due to the apparent zero shift produced by the different operating modes It is important for the user to understand why this may occur and how to correct for it There are basically three zero modes to consider a The galvanometer zero That is the true mechanical zero when no current is flowing through the coil The best way to determine this is to switch the supply to the amplifier off and then the galvanometer may be rotated so that the spot is focused at the point on the chart where the zero for that particular channel is
21. of this control Switch the mode switch on the amplifier to Cal and the Ch No Cal Micro Movements Ltd M1060 High Gain Amplifier c There d e switch on the recorder to Ch No The meter should now read 0 00V Adjust using the Zero potentiometer The sensor zero Virtually all sensors except some self generating types have a residual zero offset that is an output which is present when no physical stimulus is applied by the system under test This may be due to the sensor itself e g mis match between strain gauges in a Wheatstone bridge or to physical effects e g an accelerometer would have an output equivalent to lg in the vertical plane an absolute pressure transducer would have an output equivalent to ambient barometric pressure etc or a combination of both these conditions This offset can be nulled by the amplifier zero control as in b above are two further considerations regarding the zero condition If a sensor is calibrated in the laboratory and then taken out and mounted on the system under test there may be a difference in the zero due to a change in the temperature or mounting stresses etc and this should simply be nulled off as in b above the calibration is normally unaffected When the amplifier is switched from Run to Cal mode there may be a zero shift due to a change in the input conditions This can be nulled as before without any effect on the calibration Mode Switch Amplifier Thi
22. only be achieved by applying a known physical stimulus to the sensor for example if the sensor is a pressure transducer by the use of a deadweight tester or in the case of a load cell by applying known weights etc The M1016 calibrator works by removing the output connections from the transducer and injecting a known DC voltage into the amplifier input which corresponds to the signal produced by the transducer for a given stimulus this being determined by reference to the manufacturers test certificate for that transducer Confusion is sometimes caused during the calibration procedure due to the apparent zero shift produced by the different operating modes It is important for the user to understand why this may occur and how to correct for it There are basically three zero modes to consider a The galvanometer zero That is the true mechanical zero when no current is flowing through the coil The best way to determine this is to switch the supply to the amplifier off and then the galvanometer may be rotated so that the spot is focused at the point on the chart where the zero for that particular channel is required The Galvo On Off switch is used for this purpose b The amplifier zero The M1060 module has a variable zero which is controlled by the potentiometer marked Zero In practice the amplifier zero should be made coincident with the galvanometer zero by the use of this control Switch the mode switch on the amplifier to Cal a
23. position rotary switch is used to select one of eight sectors 0 360 in 45 steps The sector control injects a fixed offset and places the zero at the beginning of the selected sector as shown in the diagram at the bottom of the front panel The shift control provides fine trimming of the zero position Using these controls allows at one extreme one complete revolution 360 to be set for full scale output or at the other extreme 315 to 360 to be set for full scale output The range over which the unit will operate is determined by two controls coarse and fine Coarse The coarse control is a rotary switch giving the following gain values xl x2 x4 x8 Fine The fine control is a 15 turn potentiometer which interpolates the switched steps Micro Movements Ltd 3 M1043 Synchro D C Converter 3 Specification Input Configuration Input Impedance Input Range Input Frequency Resolution Accuracy Repeatability Bandwidth Tracking Rate Settling Time Noise Sector Gain Shift Output Voltage Output Impedance Voltage Output Current Output Impedance Current Package S1 S2 S3 R1 R2 Synchro S1 S2 S3 4 R1 R2 Resolver 160 Kohms differential 11 8V line to line S1 S4 4V to 50V r m s R1 R2 50Hz to 400Hz 12 bit 5 3 minutes 10 minutes 5 3 minutes 500 Hz 200 RPS 15 mS Less than 0 1 r t o 8 ranges 0 360 in 45 sectors 4 ranges xl
24. required The Galvo On Off switch is used for this purpose b The amplifier zero The M1061 module has a variable zero which is controlled by the potentiometer marked Zero In practice the amplifier zero should be made coincident with the galvanometer zero by the use of this control Switch the mode switch on the amplifier to Cal and the Ch No Cal switch on the recorder to Ch No The meter should now read 0 00V Adjust using the Zero potentiometer c The sensor zero Virtually all sensors except some self generating types have a residual zero offset that is an output which is present when no physical stimulus is applied by the system under test This may be due to the sensor itself e g mis match between strain gauges in a Wheatstone bridge or to physical effects e g an accelerometer would have an output equivalent to Ig in the vertical plane an absolute pressure transducer would have an output equivalent to ambient barometric pressure etc or a combination of both these conditions This offset can be nulled by the amplifier zero control as in b above There are two further considerations regarding the zero condition d If a sensor is calibrated in the laboratory and then taken out and mounted on the system under test there may be a difference in the zero due to a change in the temperature or mounting stresses etc and this should simply be nulled off as in b above the calibration is normally unaffected e When the amp
25. to use the centre channels for the best optical fidelity t 2 Setthe Galvo On Off SA to ON This switch Pere power to the amplifiers ara O ENS 1995 Micro Movements Ltd M1073 R M S D C Converter assess Sn a SS SU St SE se a stern 2 Adjust the shift control on the amplifier to give 0 000V on the monitor Observe the galvo it should correspond to the position set in 2 i e 11 If there is a discrepancy recheck the procedure as either there has been a wrong setting or the amplifier is faulty Set the Range switch on the M1086 to 1 00V r m s For recorders use the Fine Gain Control on the M1073 module to set the galvo spot to position 1 i e a deflection of 10cm from 11 Use the Tape control on the M1073 to set the monitor voltage to 2 00V At this stage the system has been calibrated for a sensitivity of 10cm V on the recorder and 2 00 volts volt on the voltage output Set the Run Cal switch on the amplifier to RUN The recorder will now read directly the voltage at the input connector scaled as in 5 If the galvo spot is off scale or the monitor is reading over 1 999 volts turn the range switch on the amplifier to 10 This will reduce the original setting by a factor of 10 thus indicating the input voltage as calibrated x 10 Turf the Range switch on the M1086 to OFF 1995 Micro Movements Ltd M1073 R M S D C Converter 8 1996 Micro Movements Ltd M1079 Isolated Attenuator
26. transducer Confusion is sometimes caused during the calibration procedure due to the apparent zero shift produced by the different operating modes It is important for the user to understand why this may occur and how to correct for it There are basically three zero modes to consider a The galvanometer zero That is the true mechanical zero when no current is flowing through the coil The best way to determine this is to switch the supply to the amplifier off and then the galvanometer may be rotated so that the spot is focused at the point on the chart where the zero for that particular channel is required The Galvo On Off switch is used for this purpose b The amplifier zero The M1064 module has a variable zero which is controlled by the potentiometer marked Zero In practice the amplifier zero should be made coincident with the galvanometer zero by the use of this control Switch the mode switch on the amplifier to Cal and the Ch No Cal switch on the recorder to Ch No The meter should now read 0 00V c The sensor zero Virtually all sensors except some self generating types have a residual zero offset that is an output which is present when no physical stimulus is applied by the system under test This may be due to the sensor itself e g mis match between strain gauges in a Wheatstone bridge or to physical effects e g an accelerometer would have an output equivalent to 1g in the vertical plane an absolute pressure tran
27. use 3 2 1 Basic set up a b c d e Ensure the power switch is in the OFF position located on the rear panel on the M1000 6 Select the voltage of the power source using a screwdriver on the rear panel selector The settings are DC 12V and 24V AC 115V and 230V 45 400 Hz Connect the power source to the appropriate socket on the rear panel In the case of the M1000 12 16 and 24 the left hand 4 pin socket is for the DC supply the right hand 3 pin socket for the AC supply The M1000 6 has a smaller 2 pin socket for the DC supply located above the 3 pin AC socket Connect the 7 pin connectors to the signal input connectors see section 3 3 for connection details Connect the D type output connectors to the voltage and current output sockets see section 3 3 for connection details 3 2 2 Operating Controls Set the operating controls on the front panel to suit the requirement see section 4 for the use of controls 3 2 3 Switching on Set the power switch to the ON position located on the rear panel of the M1000 6 The system should now be ready for use 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Set up 3 3 3 3 1 3 3 2 3 3 3 1996 Connection Details The rear panel connector layouts for the four cabinet types are shown in Figures 3 1 to 3 4 Mains Input This is a fixed socket with moulded free lead conforming to IEE regulations Eur
28. 000000000900 0000000000000 Daconcsoosonc 00090000000000 000000000000 o Common CHOI CH 16 HI CH15 GHS LO CH 15HI CH 13 CH 14 LO CH 14HI CH 11 CHS EO CH 13 HI CH9 Ge Lo CH 12 HI CH7 ALES CH 11 HI CH5 CH 10 LO CH 10 HI CH3 CHALO CH9HI CH1 Figure 3 3 M1000 16 Voltage and Current Output Connectors 6 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Set up 13 HPU OUTPUTS a TR SS See S bes L EF SJinpul Hi FJinpul Aux Sooma SUD BLD Hicr is Lid MIDDI Series E ee SAILTASE SELEC TOR o X a r a D OPICE CTPIDET EITETIELELEL PPUrererereyy ToIpedeped bed SPEIER PIR ETE Le a CH 21 HI CH 22 HI CH 23 HI CH 24 HI o 9 CH21LO CH 22 LO CH 23 LO CH 24 LO c O c fe c O fe fe O O Cc c fe c fe c fe c fe c O fe 0000000000000O 000000000000 000000000000 000000000000 Common 13l Figure 3 4 M1000 24 Voltage and Current Output Connectors 1996 Micro Movements Ltd 7 Set up M1000 Series Signal Conditioning System User Guide 3 3 5 A6 Inverter The A6 Inverter is a factory installed option which is available on all models allowing DC operation of the systems The connections and precautions listed below should be followed i Ensure that the mains lead is disconnecte
29. 060 High Gain Amplifier A true calibration of any system can only be achieved by applying a known physical stimulus to the sensor for example if the sensor is a pressure transducer by the use of a deadweight tester or in the case of a load cell by applying known weights etc The M1016 calibrator works by removing the output connections from the transducer and injecting a known DC voltage into the amplifier input which corresponds to the signal produced by the transducer for a given stimulus this being determined by reference to the manufacturers test certificate for that transducer Confusion is sometimes caused during the calibration procedure due to the apparent zero shift produced by the different operating modes It is important for the user to understand why this may occur and how to correct for it There are basically three zero modes to consider a The galvanometer zero That is the true mechanical zero when no current is flowing through the coil The best way to determine this is to switch the supply to the amplifier off and then the galvanometer may be rotated so that the spot is focused at the point on the chart where the zero for that particular channel is required The Galvo On Off switch is used for this purpose b The amplifier zero The M1060 module has a variable zero which is controlled by the potentiometer marked Zero In practice the amplifier zero should be made coincident with the galvanometer zero by the use
30. 100mV There will now be 55 5mV on the mainframe calibration bus Recorders only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale If all channels are not in use it is preferable to use the centre channels for the best optical fidelity Galvo ON OFF switch to ON This switch provides power to the amplifiers Calibrate OFF switch to OFF Monitor CH No CAL switch to CH No Adjust the ZERO balance potentiometer on the amplifier to give 0 00V on the monitor Observe the galvo spot it should correspond to the position set in 3 i e 11 If there is a discrepancy recheck as either the amplifier is faulty or there has been a wrong setting Calibrate OFF switch to Adjust the spot deflection to 10cm i e position 1 on the viewing scale using the FINE gain control on the amplifier If 10cm cannot be achieved turn the RANGE switch one position clockwise to increase the gain by 2 then reduce the FINE gain to re adjust to 10cm Using the TAPE potentiometer on the amplifier set the monitor voltage to a suitable value e g 2 00V At this stage the system has been calibrated for a sensitivity of 1cm 10 PSI on the recorder and a voltage output of 200mV per 10 PSI Calibrate OFF switch to OFF If there has been a change from the original settings of 11 on the graticule or 0 00V on the monitor repeat the above procedure from the original preset values in order to f
31. 3 Specifications Signal Input 7 pin lockable DIN connector one for each channel Power Supply 115 230V 45 440Hz selectable via rear panel control 12 24VDC Power Consumption M1000 6 20VA maximum M1000 12 25VA maximum M1000 16 28VA maximum M1000 24 30VA maximum Operating Temperature 0 C to 40 C Storage Temperature 20 C to 70 C Digital Monitor 3 1 2 digits Range 1 1 999 volts Range 2 19 99 volts Dual range LED display shows channel number calibration input and voltage output for each channel Calibration ImV through 10 V continuously variable Four switched attenuator ranges and Fine interpolation control Attenuator accuracy 0 5 Stability 200 p p m C Transducer Power Supply 3 12 VDC in 1V steps Output Conditioning 12 P 16 P and 24 P model cabinets have an output conditioning section below a hinged panel on the top cover Each slot must be filled with either a module or an M1088 P channel completion module to route the voltage and current outputs to the rear panel Signal Outputs VOLTAGE M1000 6 M1000 12 M1000 16 M1000 24 Standard 15 Pin D 15 Pin D 25 Pin D 25 Pin D Optional BNC BNC BNC BNC Special As required subject to space limitations 4 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Description 2 4 1996 Signal Conditioning Modules The following signal conditioning modules are available for use with the M1000 Series M1020 Desig
32. 7mV Therefore the total output change for 75 PSI applied is the sum of these two because the zero imbalance happens to be negative 38 68 2 97 41 65mV It would be sensible if we made 75 PSI equivalent to 7 5cm excursion on the chart so that in analysis the pressure is read direct from the grid lines 1cm 10PSI Thus the calibration figure would be 41 65 x 10 7 5 55 5mV for 10cm deflection Preset the controls as follows M1060 Front Panel Controls Zero Balance Potentiometer Range Switch Fine Gain Tape Control 6 Fully Counter clockwise Fully Counter clockwise Run Cal Switch Cal DIP Switch 1 Half Bridge OFF 2 Half Bridge OFF 3 Quarter Bridge OFF 4 Low Pass Filter OFF 5 Low Pass Filter OFF 6 Not Used OFF Monitor Unit Controls Monitor Range Switch 19 99 Monitor Ch No Cal Switch Cal Galvo On Off OFF Channel N Bridge Voltage as required for transducer 10V Bridge On Off OFF Calibrate OFF Calibrate Fine Calibrate Range 10V Not Important N Corresponding to channel being calibrated Note On the M12 150A the Galvo On Off switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to M1000 6 Micro Movements Ltd M1060 High Gain Amplifier 10 1 2 3 Note 4 5 6 7 8 9 10 11 Using the Calibrate FINE potentiometer set the voltage on the Monitor to 5 55V Turn Calibrate RANGE to
33. Calibration 5 5 1 Calibration Procedure 5 1996 Micro Movements Ltd 1 M1043 Synchro D C Converter M1043 SYNCHRO D C CONVERTER 1 Description The M1043 Synchro DC Converter produces a DC output signal proportional to the angular position of a synchro or resolver The input range is from 11 8 to 90VAC Applications include radar antenna position information C N C machine tool positional control motor control robot axis control gyros and general aircraft and marine use The module comprises a high precision integrated converter and DAC The gain and sector controls allow maximisation of angular resolution 2 Front Panel Controls SHIFT RE LT oro SECTOR GAIN Tape 45 a lo 3 6 2 1 B Sector Gain Coarse SECTOR INDEX Gain Fine MM M1043 Figure 1 M1043 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 2 4 1996 M1043 Synchro D C Converter This is a 22 turn potentiometer which acts as a back off or output offset control on the current output enabling the galvanometer to be shifted over plus or minus full scale output Tape A 15 turn potentiometer is used to adjust the voltage output of the amplifier independent of the galvanometer output The tape voltage output can be used to drive recorders oscilloscopes digital voltmeters or other voltage driven devices The output voltage is adjustable up to 2V DC Sector An 8
34. M1000 Series Signal Conditioning System User Guide 1996 Micro Movements Ltd Contents M2200 8 Thermal Chart Recorder User Guide il 1993 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide 1996 SECTION 1 INTRODUCTION SECTION 2 DESCRIPTION 2 1 2 2 2 3 2 4 2 5 SECTION 3 3 1 3 2 3 3 3 4 General Description 2 1 1 Signal Conditioning Cabinets 2 1 2 Signal Conditioning Applications Specifications Signal Conditioning Modules Output Conditioning Modules SET UP Installation Preparing for use 3 2 1 Basic set up 3 2 2 Operating Controls 3 2 3 Switching on Connection Details Mains Input Signal Input Output Conditioning Output Connections A6 Inverter Rack Mounting Kit M1000 24 only SD QG W CL WwW HR W WwW nA kN SECTION 4 OPERATION 4 1 4 2 Micro Movements Ltd Front Panel Controls Rear Panel Controls Contents 10 10 11 11 11 11 12 12 12 12 13 17 17 18 18 21 Contents M1000 Series Signal Conditioning System User Guide 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Introduction SECTION 1 INTRODUCTION This manual has been produced to allow the User to make full use of the Micro Movements M1000 Series Signal Conditioning System It is not intended that the User should undertake major maintenance for which the System should be returned to Micro Movements Conseq
35. M1080 Frequency D C Converter M1080 FREQUENCY D C CONVERTER CONTENTS 1 Description 2 2 Front Panel Controls 2 2 1 Shift 3 2 2 Volts 3 2 3 Tape 3 2 4 Mode 3 3 Internal Controls 4 4 Tranducer Excitation 5 5 Photo Electric Pick Ups 5 6 Offset Zero 5 7 Specification 6 8 Typical Input Circuits 7 9 Calibration 8 9 1 Calibration Procedure 8 1996 Micro Movements Ltd 1 M1080 Frequency D C Converter M1080 FREQUENCY D C CONVERTER 1 Description The M1080 Frequency DC Converter produces a DC output signal proportional to the frequency of the input signal The input may be a dynamic waveform from 10mV r m s to 100V r m s Applications include flow measurement impeller flowmeters photo electric and magnetic shaft speed sensors and AC tachometers 2 Front Panel Controls Shift Range Coarse Range Fine Tape Mode Figure 1 M1080 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 2 4 1996 M1080 Frequency D C Converter This is a 22 turn potentiometer which acts as a back off or output offset control on the current output enabling the output to be shifted over plus or minus full scale output Volts The frequency range over which the unit will operate is determined by two controls coarse and fine Coarse The coarse control is a rotary switch calibrated directly in input frequency Typical Deflection of M1600 galvanometer Input Frequency Position of fi
36. PSI Calibrate OFF switch to OFF Check that zero is still true RUN CAL switch on the amplifier to RUN Check that zero is still true Bridge ON OFF switch to ON The zero will almost certainly move due to residual offset Use the Zero control to reset the output shown on the Monitor to 0 00V For recorders this should correspond to the spot in the original zero position i e 11 on the graticule The system is now fully calibrated and ready for use For recorders if a different position is preferred for the galvo mechanical zero set the Galvo ON OFF switch to the OFF position before moving the galvo Return the switch to ON after the galvo has been set If after step 10 the galvo or voltmeter are completely off scale note the position of the range switch and temporarily reduce the gain of the amplifier by turning the range switch counter clockwise one or two positions until the monitor voltage reduces and or the spot is visible and then re balance If it still cannot be re balanced there must be a fault in the bridge circuit all four arms of the bridge should be checked at the free connector 1996 Micro Movements Ltd 11 M1064 High Gain Amplifier 12 1996 Micro Movements Ltd 1996 M1070 Attenuator Amplifier M1070 ATTENUATOR AMPLIFIER CONTENTS 1 Description 2 Front Panel Controls Micro Movements Ltd 2 1 Shift 2 2 Range 2 3 Tape 2 4 Mode Internal controls 3 1 Bridge Completion 3 2 Low Noise O
37. V bridge excitation However the range can be modified by internal adjustment see section 4 2 Span The amplifier span gain is set by two controls coarse and fine which cover the approximate range 20 to 5000 1 Coarse Gain The Coarse Gain control is a 10 position rotary switch calibrated such that in each successive position the gain is halved The gain settings are as follows Position Gain approx Typical input for a 5cm deflection Min V Max V 0 5000 0 4 0 7 1 2500 0 7 1 5 2 1250 1 5 3 3 625 3 6 4 312 6 11 5 156 11 22 6 78 22 45 7 39 45 90 8 20 90 175 00 0 5 N A N A Fine Gain The Fine Gain control is a 15 turn potentiometer which interpolates the gain steps so that the gain is continuously variable over the switched range Tape A separate amplifier is incorporated to give a buffered voltage output from the unit to drive oscilloscopes tape recorders etc via the Voltage Output connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the module front panel up to 2V DC Micro Movements Ltd 3 M1060 High Gain Amplifier 2 4 3 1 3 2 Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 and 5 on the Signal Input Connector see section 8 In the Calibration CAL pos
38. a Figure 4 Potentiometric Noo R amp D Figure 5 Resistance Thermometer m Li 2 m 3 mm 4 5 2 D 7 Figure 6 DC DC LVDT 1996 Micro Movements Ltd 7 M1070 Attenuator Amplifier 8 Calibration A true calibration of any system can only be achieved by applying a known physical stimulus to the sensor for example if the sensor is a pressure transducer by the use of a deadweight tester or in the case of a load cell by applying known weights etc The M1016 calibrator works by removing the output connections from the transducer and injecting a known DC voltage into the amplifier input which corresponds to the signal produced by the transducer for a given stimulus this being determined by reference to the manufacturers test certificate for that transducer Confusion is sometimes caused during the calibration procedure due to the apparent zero shift produced by the different operating modes It is important for the user to understand why this may occur and how to correct for it There are basically three zero modes to consider a The galvanometer zero That is the true mechanical zero when no current is flowing through the coil The best way to determine this is to switch the supply to the amplifier off and then the galvanometer may be rotated so that the spot is focused at the point on the chart where the zero for that particular channel is require
39. cer supply M1015 appears on pins 1 and 2 of the amplifier These are connected via R1 and R2 to pins 3 and 4 which in turn are connected to pins and 2 on the 7 pin Signal Input Connector at the rear of the instrument Thus the transducer cannot be energised unless there is an amplifier present in that particular channel Note that the amplifier is normally supplied with R1 and R2 replaced by wire links so that the full supply 3 12V DC as selected by the Bridge Volts switch appears across the transducer However if a reduced supply is required on a particular channel these may be replaced by resistors of the appropriate value to act as droppers in the supply lines For example With 10V excitation selected a particular strain gauge is required to be energised with 2 5V Bridge resistance 120 ohms Bridge excitation 2 5V Volt drop required 7 5V Therefore R1 R2 120x7 5 2 5 360 ohms So R1 and R2 are 180 ohms each Provision is also made to reverse the excitation polarity by means of links A or B on the board or of course this may also be achieved by reversing pins and 2 on the Signal Input connector Zero Balance Range Bridge balance is set by a 22 turn potentiometer which has a nominal range of 20mV at the input 4000 microstrain for 10V bridge excitation For transducers with a very large residual imbalance the range of this control may be increased by the adjustment of R10 Voltage Output Range
40. ch calibrated directly in gain the actual sensitivity obtained being a function of the galvanometer type Indicated Range Typical Input Voltage for 5cm deflection Max fine gain Min fine gain fully counter clockwise fully clockwise 100 i 75V 10 175V 7 5V xl 7 5V 750mV x10 750mV 75mV x100 75mV 7 5mV see section 5 Fine Gain The Fine Gain control is a 15 turn potentiometer which interpolates the gain steps so that the gain is continuously variable over the switched range Tape A separate amplifier is incorporated to give a buffered voltage output from the unit to drive oscilloscopes tape recorders etc via the Voltage Output connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the module front panel up to 10V DC Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the input via pins 4 and 5 on the Signal Input Connector see section 8 In the Calibration CAL position the input is connected to a DC calibration voltage derived from the recorder or signal conditioning cabinet being used Micro Movements Ltd 3 M1079 Isolated Attenuator Amplifier 3 Internal Controls None available on this module 4 Sensor Excitation 4 1 Transducer Supply Not available on this module 4 2 Zero Balance Range Bridge ba
41. d The Galvo On Off switch is used for this purpose b The amplifier zero The M1060 module has a variable zero which is controlled by the potentiometer marked Zero In practice the amplifier zero should be made coincident with the galvanometer zero by the use of this control Switch the mode switch on the amplifier to Cal and the Ch No Cal switch on the recorder to Ch No The meter should now read 0 00V Adjust using the Zero potentiometer c The sensor zero Virtually all sensors except some self generating types have a residual zero offset that is an output which is present when no physical stimulus is applied by the system under test This may be due to the sensor itself e g mis match between strain gauges in a Wheatstone bridge or to physical effects e g an accelerometer would have an output equivalent to lg in the vertical plane an absolute pressure transducer would have an output equivalent to ambient barometric pressure etc or a combination of both these conditions This offset can be nulled by the amplifier zero control as in b above There are two further considerations regarding the zero condition d If a sensor is calibrated in the laboratory and then taken out and mounted on the system under test there may be a difference in the zero due to a change in the temperature or mounting stresses etc and this should simply be nulled off as in b above the calibration is normally unaffected e When the amplifier i
42. d and set the Voltage Selector to the correct position il Connect the DC supply Battery to the cabinet using the cable supplied Cable Specifications Nominal Area Maximum Length 6 sq mm 2M each lead 10 sq mm 5M each lead 16 sq mm 10M each lead 35 sq mm 25M each lead Supply Voltage Range Nominal 12VDC 11 14V Nominal 24VDC 22 29V Nominal Current M1000 6 M1000 12 M1000 16 M1000 24 12V 1 amp 1 amp 2 amps 2 5 amps 24V 0 5 amp 0 5 amp 1 amp 1 5 amps 3 4 Rack Mounting Kit M1000 24 only The M1000 24 may be factory fitted with Rack Mounting Brackets compatible with standard 19 rack frames If the rack depth is advised telescopic slides can be provided which fit directly onto the sides of the cabinet The Rack Mounting option may be retrofitted 8 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Operation SECTION 4 OPERATION The M1000 Series of instruments are configured to accept a range of plug in signal conditioning modules and data amplifiers and can thus be used as completely self contained data acquisition systems with a very wide range of transducers such as load cells thermocouples strain gauges pressure transducers accelerometers flowmeters displacement transducers etc The controls described in this section are adjusted in conjunction with the conditioning module controls to set the system for use Their operation in most cases is self evident however some d
43. d voltage output from the unit to drive oscilloscopes tape recorders etc via the Voltage Output connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the module front panel up to 2V DC Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 and 5 on the Signal Input Connector see section 8 In the Calibration CAL position the input is connected to a DC calibration voltage derived from the recorder or signal conditioning cabinet being used Micro Movements Ltd 3 M1061 Thermocouple Amplifier 3 3 1 Internal controls Compensation Range Because different types of thermocouple exhibit different sensitivities it is necessary to change the range of the compensation network which is used with the input connector reference junction This is achieved by operation of poles 1 3 on the internal 6 pole switch SW3 For application information refer to C1061 R When this connector is not used poles 1 2 and 3 of SW2 should be left open Poles 1 2 and 3 of SW3 are used as follows Pole 1 Closed Gives cold junction compensation at a rate of 41u V C RTI Type K thermocouple Chromel Alumel Positive Nickel chromium Negative Nickel aluminium Pole 2 Closed Gives cold junction compensation at a rate of 53uV
44. dium to high level inputs e g potentiometric transducers DC DC LVDTs servo accelerometers tape replay amplifiers Separately controlled buffered voltage output to drive data storage equipment Micro Movements Ltd 5 Description M1000 Series Signal Conditioning System User Guide C1070 H Adaptor High impedance adaptor for operation of M1070 with piezo electric sensors or signals with very high source impedance M1071 Variable Attenuator Resistive network to provide attenuation matching and damping between high level inputs and most types of galvanometer Separately controlled buffered voltage output to drive tape recorders etc C103 High Voltage Connector With 60dB balanced attenuator network for measuring high input voltages up to 500V RMS C104 High Voltage Connector With 80dB balanced attenuator network for measuring high input voltages up to 500V RMS C NA Shunt Connector For current measurement N specifies the current Range 0 1 to 10 amps M1073 RMS DC Converter Precision rectifier unit for monitoring amplitude changes in AC waveforms Includes separate buffered voltage output for tape recording etc M1080 Frequency DC Converter For use with impeller flowmeters magnetic or photo electric RPM pickups tachometers vibration pickups Separately controlled buffered voltage output to drive data storage equipment M1085 Oscillator Module Nine calibrated ranges from 20Hz to 10kHz crystal controlled
45. e 3 a 1 m Loo m3 pS m5 i mm 6 ms 7 Figure 4 Piezoresistive Transducer 1996 Micro Movements Ltd M1049 Carrier Oscillator Amplifier and Demodulator Note 7 1 Calibratio 1 Note 2 3 4 5 On the M12 150A the Galvo ON OFF switch is fitted inside the Signal Conditioning access hatch on the top of the instrument This feature is not fitted to M1000 6 n Procedure Recorders Only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale If all channels are not in use it is preferable to use the centre channels for the best optical fidelity e g Channels 3 through to 7 Galvo ON OFF switch to ON This switch provides power to the amplifiers Rotate the shift control to set the monitor voltage to 0 00V Observe the galvo spot on the viewing scale it should be on the position as set in 1 i e 11 If it is not check the procedures again Otherwise there is a fault in the amplifier RUN OFF CAL switch to CAL Use the fine gain potentiometer to set the spot to give a deflection of 5 56cm on the viewing scale i e 11 5 56 5 44 Use the TAPE potentiometer to set the Monitor display to 1 112 volts RUN OFF CAL switch to RUN Position the LVDT armature to a known position e g centre point Use the zero balance to adjust the monitor to the corresponding value e g the centre point would be 1 00 volts The system is n
46. e rear panel of the recorder thus providing excitation for optical pick ups etc M1080 S9 Photo Electric Pick Ups It is common for PEP outputs to be unidirectional Pins are provided for an offset to the input so that the input is driven by a unidirectional signal e g If the compatible positive square wave connect a 47k ohms resistor across giving a 2V bias to the input Offset Zero input is a TTL D4 thus Many applications require an offset zero facility e g in monitoring 50Hz or 400Hz power supplies to record a deviation of 10 The DIL switch position provides an offset zero when closed The value of the offset is controlled by AOT resistor R23 and potentiometer VR4 In the offset mode it is not always possible to obtain the required gain in the system e g 4 10 is only one fifth of the normal output A provision to increase the gain is provided by R12 R12 Normally open circuit R12 4k7 Increases gain by 2 R12 2k2 Increases gain by 3 R12 1k2 Increases gain by 5 Note Further gain increases will reduce the stability of the system Micro Movements Ltd M1080 Frequency D C Converter Specification Input Configuration Input Impedance Input Mode Input Range Maximum Input Drift Bandwidth Full Scale Range Output Voltage Output Impedance Voltage Output Current Output Impedance Current Filters Shift Package Single ended 10k ohms
47. e residual imbalance the range of this control may be increased by the adjustment of R10 5 High Voltage Operation A special connector type C104 with a built in balanced attenuator can be used to extend the input range up to 250V r m s See documentation on C104 High Voltage Connector 1996 Micro Movements Ltd 5 M1070 Attenuator Amplifier 6 Specification Input Configuration Input Impedance Input Mode Input Range Maximum Input C104 Noise Drift Bandwidth Gain Output Voltage Output impedance Voltage Output Current Output Impedance Current Package 7 Typical Input Circuits G Figure 2 Analogue Signals a Ni e Low Gain Differential 220 Kohm Differential 1 Resistive bridge in 1 2 or 4 arm connection with internal bridge completion 2 Medium high level signals generally Up to 500 mV approx 125V D C up to 250V r m s with adaptor type Less than 20 microvolts r m s r t i Less than 20 microvolts C r t 1 D C 10KHz 100 x100 in 5 switched steps with interpolate control Upto 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Standard M1000 series module mt im 12 mm 3 ost 4 l 15 m 16 D7 m1 m 2 m 3 C104 Earth Ta Figure 3 High Voltage m 4 m 5 i mm 6 mn 7 mala 1996 Micro Movements Ltd M1070 Attenuator Amplifier 1 id
48. een 3 and 12 volts in 1V increments and the toggle switch is an ON OFF control Calibrate In the CALIBRATE box there are two switches and a potentiometer to control the M1016 calibrator The range switch is a four position rotary switch with the ranges 10mV 100mV 1V and 10 volts The three position toggle switch gives three values of calibration Positive OFF and Negative The fine gain potentiometer allows adjustment of the calibration voltage to any value The calibration can be set utilising the monitor in the CAL position To set a small voltage accurately adjust the value on a higher range of the rotary switch and then turn to the lower range e g Ifa value of 4 32 volts is set on the 10V range and the rotary switch is turned to the 10mV range a voltage of 4 32mV will appear at the input to the amplifiers More details can be obtained from the calibration section contained within the indiviual module User Guides Micro Movements Ltd Operation Operation M1000 Series Signal Conditioning System User Guide 4 2 Rear Panel Controls Input Connectors 7 pin DIN See section 2 for connection details e Voltage Outputs Female D connector contains voltage output suitable for tape or logger from each of the signal conditioning channels e Galvanometer Outputs Female D connector contains output for connections to a Micro Movements galvanometer from each of the signal conditioning channels Voltage Selector Rotary s
49. etails need explanation For further details of the conditioning controls calibration and set up refer to the individual conditioning module User Guides 4 1 Front Panel Controls Figure 4 1 shows the front views of the M1000 6 and 12 The front panel controls of the M1000 16 and 24 are similar to those of the M1000 12 only the number of usable channels differ MICRO MOVENENTS LTO ENGLAND MONITOR 100mV 1V 1 10v O Q MKRO MOVEMENTS LTO N1000 6 CH ie CH NO Q 1999 OFF me 1999 ove 19 1l BRIDGE CALIBRATE CHANNEL fine ONCS OFF OFF 10rmV 0mV WV 10V Mu M000 24 0 Micra Mavements Ltd POWER MONITOR I CH ie Q A999 5 eG CH _NO BRIDGE CALIBRATE CHANNEL or 210 OFF fine 1 8 Os 16 volts Orv 100mV 1V 10V MM M1000716 Miero Movements Ltd 1996 Figure 4 1 Front panel of M1000 6 M1000 12 and M1000 16 Micro Movements Ltd Operation M1000 Series Signal Conditioning System User Guide Monitor The monitor on the 12 16 and 24 displays two lines of data the 6 displays one line e Channel number being displayed or calibration e g CH11 or CAL Not for M1000 6 e A 3 1 2 digit voltmeter with auto polarity which is used to monitor either the voltage output from any signal conditio
50. etc via the Voltage Output connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the module front panel up to 10 Volts dc Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 and 5 on the Signal Input Connector see section 8 In the Calibration CAL position the input is connected to a DC calibration voltage derived from the recorder or signal conditioning cabinet being used Note When used in the CAL position the front panel Zero control is disabled The CAL zero is preset on an internal adjustment Internal controls Bridge Completion The amplifier may be used with resistive bridge networks in the 1 2 or 4 arm mode In the 1 or 2 arm mode bridge completion is achieved by connecting dummy bridge arms within the amplifier by means of an internal switch SW2 The switch is a 6 pole 2 position type of which poles 1 2 and 3 are concerned with bridge conditioning The dummy bridge arms should be switched in according to the input configuration as follows Full Bridge In this case the bridge is completed within the transducer therefore poles 1 2 and 3 should be in the Open position Half Bridge Poles 1 and 2 are Closed bringing in the two 499 ohm dummy arms Pole 3 remains Open Quarter Bridge
51. h 10V excitation typical for an unbonded strain gauge type However it is unlikely that any particular transducer would have an output of exactly 40mV more likely it would be somewhere within 10 of this value So we look at the manufacturers calibration certificate supplied with the transducer and see that this is a 75 PSI unit which has an output of 38 68mV at 75 PSI if energised with a 10V DC supply Note If energised by a different supply the output is normally pro rata but the temperature coefficient is sometimes degraded The transducer has a zero imbalance i e an output when no pressure is applied of 2 97mV Therefore the total output change for 75 PSI applied is the sum of these two because the zero imbalance happens to be negative 38 68 2 97 41 65mV Preset the controls as follows M1064 Front Panel Controls Zero Balance Potentiometer 1996 Micro Movements Ltd 9 M1064 High Gain Amplifier Range Switch Fine Gain Tape Control 5 Fully Counter clockwise Fully Counter clockwise Run Cal Switch Cal DIP Switch 1 Half Bridge OFF 2 Half Bridge OFF 3 Quarter Bridge OFF 4 Low Pass Filter OFF 5 Low Pass Filter OFF 6 2 V limit OFF Mainframe Monitor Unit Controls Monitor Range Switch 19 99 Monitor Ch No Cal Switch Cal Galvo On Off OFF Channel N Bridge Voltage as required for transducer 10V Bridge On Off OFF Calibrate OFF F Calibrate Fine t Calibrate Range 10V Not Important
52. he monitor It is useful to check linearity at this stage Set the M1085 RANGE switch to 200Hz The deflection should be 200 500 x 5 65 2 26cm Scale reading 11 2 26 8 74cm Monitor reading 200 500 x 1 130 0 452V Set the RUN CAL switch on the M1080 to RUN The system is now calibrated and ready for use It is advisable to return the M1085 RANGE switch to OFF Micro Movements Ltd 9 M1080 Frequency D C Converter 10 1996 Micro Movements Ltd
53. ine tune the system RUN CAL switch on the amplifier to RUN Use the ZERO balance potentiometer to set 0 000V on the monitor The galvanometer spot should still correspond to position 11 on the viewing scale Bridge ON OFF switch to ON The zero will almost certainly move due to residual offset Use the Zero control to position the spot to the original zero position i e 11 on the graticule The system is now fully calibrated and ready for use If a different position is 1996 Micro Movements Ltd M1060 High Gain Amplifier preferred for the galvo mechanical zero set the Galvo ON OFF switch to the OFF position before moving the galvo Return the switch to ON after the galvo has been set 12 If after step 10 the galvo or voltmeter are completely off scale note the position of the range switch and temporarily reduce the gain of the amplifier by turning the range switch counter clockwise one or two positions to find the spot and then re balance If it still cannot be re balanced there must be a fault in the bridge circuit all four arms of the bridge should be checked at the free connector 1996 Micro Movements Ltd 11 M1060 High Gain Amplifier 12 1996 Micro Movements Ltd M1061 Thermocouple Amplifier M1061 THERMOCOUPLE AMPLIFIER CONTENTS 1 Description 2 2 Front Panel Controls 2 2 1 Offset 3 2 2 mV f s d 3 2 3 Tape 3 2 4 Mode 3 3 Internal controls 4 3 1 Compensation Range 4 4 Specification 5 5 Typical
54. ion to the high voltage source They can be used with the Mxx60 and Mxx70 amplifiers to extend their range to read voltages up to 250 volts A C and also with the Mxx80 to measure the frequency of high A C voltages e g 230V 115V power lines 1 1 Attenuation C103 Fixed 60dB 1 000 1 C104 Fixed 80dB 10 000 1 1 2 Installation Incoming High Voltage lead 1 Lo Signal Input 2 Hi 3 Earth WARNING THIS CONNECTOR MUST BE EARTHED TO PIN 3 OF INPUT CONNECTOR AND CONNECTOR SHELL 2 1996 Micro Movements Ltd 3 M C103 C104 High Voltage Connectors Calibration When used with Mxx60 and Mxx70 modules the calibration procedures are followed as per the individual modules and the voltage referred to the input is multiplied by either 1 000 C103 or 10 000 C104 Example An input voltage of 200V is required to deflect 2 cm on the recorder The Mxx60 or Mxx70 are calibrated using a calibration voltage of 200 divided by 10 000 20 mV The Mxx80 calibration is not affected by the use of the C104 It should be noted however that the Mxx80 has a minimum sensitivity of 10 millivolts RMS When the Mxx80 is used with the C104 the minimum sensitivity of the Mxx80 is therefore increased to 100V RMS Typical Input Circuit i m 1 a 2 3 m 3 O m 4 Earth 3 1mm 5 mi 6 mm 7 Figure 1 High Voltage C104 SER No xxx CONNECT INPUT EARTH 10S 282 4945 CM
55. ition the input is connected to a DC calibration voltage derived from the recorder or signal conditioning cabinet being used Internal controls Bridge Completion Low The amplifier may be used with resistive bridge networks in the 1 2 or 4 arm mode In the 1 or 2 arm mode bridge completion is achieved by connecting dummy bridge arms within the amplifier by means of an internal switch SW2 The switch is a 6 pole 2 position type of which poles 1 2 and 3 are concerned with bridge conditioning The dummy bridge arms should be switched in according to the input configuration as follows Full Bridge In this case the bridge is completed within the transducer therefore poles 1 2 and 3 should be in the Open position Half Bridge Poles 1 and 2 are Closed bringing in the two 499 ohm dummy arms R25 and R26 Pole 3 remains Open Quarter Bridge Poles 1 2 and 3 are Closed Note that closing Pole 3 brings in R27 which is normally 120 ohms If the resistance of the single external bridge arm is different from this value R27 must be changed to match it See also Typical Input Circuits Noise Operation To minimise output noise at high gains a low pass filter can be switched in by closing Poles 4 and 5 of SW2 This however has the effect of reducing the bandwidth to approximately 150Hz 1996 Micro Movements Ltd 4 1 4 2 1996 M1060 High Gain Amplifier Sensor Excitation Transducer Supply The 3 12V DC transdu
56. lance is set by a 22 turn potentiometer which has a nominal range of 10V at the output 5 High Voltage Operation A special connector types C103 or C104 with a built in balanced attenuator can be used to extend the input range up to 250V r m s See documentation on C103 C104 High Voltage Connector 6 Specification Input Configuration Input Impedance Maximum Input Noise Drift Gain Offset Bandwidth Isolation Voltage CMRR IMRR Output Voltage Output impedance Voltage Output Galvo Output Impedance Galvo Package Isolated Differential gt 2Mohm Differential 100V D C Less than 20 uV 4uV VE Less than 20 p C r t i 100 x100 in 5 switched steps with interpolate control 10 V at output 2 KHz 10KHz maximum 1000 V gt 60dB gt 100dB Up to 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Standard M1000 series module 1996 Micro Movements Ltd 7 Typical Input Circuits Q NO Gi WN he Figure 2 Analogue Signals 1 o M1079 Isolated Attenuator Amplifier C104 3 Earth Dis Figure 3 High Voltage 7 1 Input Connections 7 Pin Din Connector PIN NO yy AUA D 1996 Micro Movements Ltd FUNCTION Not Connected Not Connected Not Connected Input Low Input High Isolated Ground Earth M1079 Isolated Attenuator Amplifier 8 Calibration A true calibration of any system can
57. le Amplifier From Type K thermocouple tables the output of the thermocouple at 100 C 4 10mV Adjust the Calibrate FINE potentiometer on the recorder to read 4 10 volts on the monitor Switch the Calibrate RANGE switch to 10mV The voltage on the amplifier calibration terminals will now be 4 10mV This voltage cannot be measured accurately on the monitor and is achieved by means of a precision divider on the Range switch If a recorder is being used set the galvo spot to 11 on the viewing scale If all channels are not in use it is preferable to use the centre channels for the best optical fidelity Set the Galvo ON OFF switch to ON The amplifiers are now energised Monitor CH No CAL Switch to CH No Monitor RANGE switch to 1 999V Calibrate OFF switch to OFF Use the OFFSET potentiometer to set the voltage monitor to 0 000V Observe the galvo spot which should be at the position as set in 4 i e 11 If otherwise the amplifier is faulty Set the Calibrate OFF switch to Use the FINE gain on the M1061 to adjust the galvo spot to 1 on the viewing scale Set the OFF switch to OFF Check the galvo spot has not moved from 11 If it has moved repeat 7 and 8 until the spot can be moved from 11 to 1 using the Calibrate OFF switch in the OFF and positions Return the Calibrate OFF switch to switch the monitor RANGE switch to 19 99V and adjust the TAPE potentiometer on the M1061 to read 2 00 vo
58. le or 0 00V on the monitor repeat the above procedure from the original preset values in order to fine tune the system Set the RUN CAL switch on the amplifier to RUN The recorder will now read directly the voltage at the input connector scaled as in 7 If the galvo spot is off scale turn the range switch on the amplifier to x 1 This will reduce the original setting by a factor of 10 thus indicating the input voltage as calibrated x 10 10 1996 Micro Movements Ltd 1996 M1073 R M S D C Converter M1073 R M S D C CONVERTER CONTENTS 1 Description 2 Front Panel Controls Micro Movements Ltd 2 1 Shift 2 2 Volts 2 3 Tape 2 4 Mode Functional Description High Voltage Operation Specification Typical Input Circuits Calibration 7 1 Calibration Procedure A WD WW W N M1073 R M S D C Converter M1073 R M S D C CONVERTER 1 Description The M1073 is an R M S D C Converter that accepts AC inputs in the range 10mV r m s to 100V RMS and provides a DC signal to the galvanometer and tape outputs Typical inputs would be from current transformers tape replay amplifiers 50 60Hz and 400Hz power lines etc see also section 4 2 Front Panel Controls SHIFT pa Shift VOLTS rms 19 o1 Volts Coarse 100 001 CS Volts Fine TAPE EE run Tape D Mode Figure 1 M1073 Front Panel IE ORG ca MODE MM M1075 1996 Micro Movements Ltd 2
59. lifier is switched from Run to Cal mode there may be a zero shift due to a change in the input conditions This can be nulled as before without any effect on the calibration 1996 Micro Movements Ltd 7 M1061 Thermocouple Amplifier 6 1 Calibration Procedure A typical calibration procedure for one channel would be as follows Example It is required to scale the M1061 for 0 100 C with a Type K thermocouple 0 100 mm deflection recorders only 0 2 00 volts recorders and cabinets Before the calibration is started the controls require presetting as follows M1061 Front Panel Offset Potentiometer Range Switch 10mV Fine Gain i Tape Potentiometer Mode Switch Cal 6 Pole DIP Switch 1 For Type K thermocouple ON 2 For Type T thermocouple OFF 3 Unallocated thermocouple OFF 4 Cal divided by 25 OFF 5 Low Pass Filter OFF 6 Low Pass Filter OFF Monitor Unit Controls Monitor Range Switch 19 99 Monitor Ch No Cal switch Cal Galvo On Off switch OFF Channel N Bridge Voltage Bridge On Off OFF Calibrate Off Calibrate Fine Calibrate Range 10V Not Important N Corresponding to channel being calibrated Note On the M12 150A the Galvo ON OFF switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to M1000 6 1996 Micro Movements Ltd 1996 1 2 3 4 Note 5 6 7 8 9 10 11 e g M1061 Thermocoup
60. lts on the monitor Repeat 7 8 and 9 as required Set the Calibrate OFF switch to OFF and the Bridge ON OFF switch to ON Observe the position of the galvo spot and the monitor voltage The values of both should correspond to the temperature of the C1061 R connector typically 3 to 5 C above the ambient temperature 1 e approximately 25 C The deflection of the spot would be 25mm left of the position 11 and the voltmeter would read 0 50 volts Set the MODE switch to RUN and the Bridge ON OFF switch to OFF Observe the spot and the monitor The values observed should now be the difference between the temperature at the thermocouple and the temperature at the C1061 R If the thermocouple is in free air reading ambient temperature the reading will usuallly be negative due to the C1061 R being at a slightly higher temperature i e the spot would be 3 to 5mm right of position 11 and the voltmeter would read 0 03 to 0 05 Micro Movements Ltd 9 M1061 Thermocouple Amplifier 12 Set the Bridge ON OFF switch to ON The temperature as measured on the cold junction C1061 R is now added to the previous reading and the recorder and the monitor will indicate the temperature of the thermocouple in C The system is now fully calibrated operational and ready for use Type 0 C 200 C 400 C 600 C 1000 C K Nickel Chromium Nickel Aluminium 0 8 13 16 4 24 91 41 31 J Iron Constantan 0 10 95 22 1 33 67 T Copper Constantan
61. m Differential 1 Resistive bridge in 1 2 or 4 arm connection with internal bridge completion 2 Low level signals generally Up to 1 V approx 20mV r t i 15V D C 90dB D C to 60 Hz Less than 5 microvolts r m s r t i at max gain Less than 2 microvolts C r t i at max gain 100Khz at Max gain 50KHz at max gain 1 to 2000 in switched steps with interpolate control Up to 10V DC 0 5 ohms 10mA into 120 ohms 250 ohms Standard M1000 series module 1996 Micro Movements Ltd M1064 High Gain Amplifier Figure 2 Strain Gauge Strain Gauge 1 4 Bridge Strain Gauge Full Bridge Figure 3 Analogue Signals A m 3 i Figure 4 High Voltage AA D C104 dJ a Earth 3 m 15 m 6 8 Calibration A true calibration of any system can only be achieved by applying a known physical 1996 Micro Movements Ltd M1064 High Gain Amplifier stimulus to the sensor for example if the sensor is a pressure transducer by the use of a deadweight tester or in the case of a load cell by applying known weights etc The Micro Movements mainframe calibrator works by removing the output connections from the transducer and injecting a known DC voltage into the amplifier input which corresponds to the signal produced by the transducer for a given stimulus this being determined by reference to the manufacturers test certificate for that
62. nd 5 on the Signal Input Connector see section 7 In the Calibration CAL position the amplifier is connected directly to the AC calibration signals on pins 15 and 16 of the amplifier connector Micro Movements Ltd 3 M1073 R M S D C Converter The AC calibration is connected to the 13 8V AC 50Hz transformer winding and therefore is limited in application For accurate calibration an external signal generator and AC reading digital voltmeter are necessary 3 Functional Description The module consists of an attenuator followed by a differential amplifier The output of the differential amplifier feeds a precision rectifier which is followed by a two pole Butterworth Filter The filter is set to give 1 ripple on a 50Hz signal 4 High Voltage Operation A special connector type C104 with a built in balanced attenuator can be used to extend the input range up to 250V r m s See documentation for C104 High Voltage Attenuator 5 Specification Input Range 10mV to 100Vr m s Input Frequency 50Hz to 10kHz Input Impedance 220k ohms differential Attenuator Coarse 5 positions 10mV 100mV 1V 10V 100V Attenuator Fine Interpolates 10 1 range Output Voltage Upto 10V DC Output Impedance Voltage 0 5 ohms Output Current 10mA into 30 ohms Output Impedance Current 250 ohms Maximum Input 100Vrms Linearity 0 5 6 Typical Input Circuits 4 1996 Micro Movements Ltd M1073 R M S D C Converter Figu
63. nd the Ch No Cal switch on the recorder to Ch No The meter should now read 0 00V Adjust using the Zero potentiometer c The sensor zero Virtually all sensors except some self generating types have a residual zero offset that is an output which is present when no physical stimulus is applied by the system under test This may be due to the sensor itself e g mis match between strain gauges in a Wheatstone bridge or to physical effects e g an accelerometer would have an output equivalent to 1g in the vertical plane an absolute pressure transducer would have an output equivalent to ambient barometric pressure etc or a combination of both these conditions This offset can be nulled by the amplifier zero control as in b above There are two further considerations regarding the zero condition d If a sensor is calibrated in the laboratory and then taken out and mounted on the system under test there may be a difference in the zero due to a change in the temperature or mounting stresses etc and this should simply be nulled off as in b above the calibration is normally unaffected e When the amplifier is switched from Run to Cal mode there may be a zero shift due to a change in the input conditions This can be nulled as before without any effect on the calibration 1996 Micro Movements Ltd 8 1 1996 Calibration Procedure M1079 Isolated Attenuator Amplifier A typical calibration procedure for one channel wo
64. ne As indicated on 20 of indicated gain potentiometer range switch range Fully clockwise 55cm 11cm Fully counter clockwise 5cm lem Fine The fine control is a 15 turn potentiometer with a 5 1 range which interpolates the switched steps Tape A 15 turn potentiometer is used to adjust the voltage output of the amplifier independent of the galvanometer output The tape voltage output can be used to drive recorders oscilloscopes digital voltmeters or other voltage driven devices The output voltage is adjustable up to 2V DC Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 and 5 on the Signal Input Connector see section 7 In the Calibration CAL position the input is connected to a calibration signal The source of this calibration signal is described in section 3 Micro Movements Ltd 3 M1080 Frequency D C Converter 3 Internal Controls A 6 pole dual in line DIL switch SW2 is mounted on the printed circuit board this switch is accessible through a cut out in the side of the amplifier cover SW2 1 Optional Offset An optional offset can be fitted to the Frequency to DC Converter This is of value for measuring variations on a fixed frequency e g frequency variations of 50 60Hz power lines or 400Hz aircraft supplies This is a factory fitted
65. ners Module A matrix pattern printed circuit card contained within a standard amplifier module which enables non standard circuits specials etc to be utilised within the system Input output power supplies calibration etc are all accessed via the module connector M1049 Oscillator Amplifier Demodulator Filter For energising and conditioning of variable reluctance transducers differential transformers AC excited LVDTs etc With built in continuously variable stored calibration facility Separately controlled buffered voltage output to drive data storage equipment M1055 Passive Conditioner Universal module with bridge balance span adjust and shunt calibration controls for resistive transducers Range adjustable by resistor change to match most inputs to low frequency galvanometers M1060 High Gain DC Amplifier Differential Amplifier for use with most types of low level transducers e g strain gauges in 1 2 or 4 active arm configuration bonded and unbonded strain gauge transducers and load cells Separately controlled buffered output to drive data storage equipment M1061 Thermocouple Amplifier For use with thermocouples and similar low level devices Full scale output for ImV to 100mV input Separately controlled buffered voltage output to drive tape recorders etc C1061 R Connector Special connector with integral cold junction compensation for above M1070 Attenuator Amplifier General purpose unit for me
66. ning module or the output from the calibrator There are also three switches associated with the monitor 1 999 19 99 This is the Voltmeter Range Selector switch The maximum value that can be displayed is represented by the two switch positions 1 999 and 19 99 CH No CAL The CH No CAL toggle switch not M1000 6 is used to select the monitor input either a channel input or the calibration section output Galvo OFF ON The Galvo ON OFF toggle switch not M1000 6 controls the power supply to the signal conditioning modules With this switch on the Galvo OFF position the galvanometers can be rotated to a suitable mechanical zero refer to the Calibration Section at the end of each module User Guide 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide 1996 Channel No M1000 6 This rotary switch selects the channel ouput 1 to 6 for display on the monitor The internal DC calibration voltage can also be selected for display Channel M1000 12 16 24 Two switches are used for channel selection a A rotary switch to select channels 1 to 12 b A toggle switch to select 1 to 12 or 13 to 24 In the 13 to 24 position 12 must be added to the value indicated on the rotary switch The channel selected is displayed on the monitor Bridge The two switches in the BRIDGE box control the output of the Transducer Power Supply The rotary switch selects the voltage of the power supply betw
67. o ON OFF switch to ON This switch provides power to the amplifiers Set the Calibrate OFF switch to OFF Set the Monitor CH No CAL switch to CH No Set the Monitor 1 999 19 99 switch to 19 99 Adjust the SHIFT potentiometer on the amplifier to give 0 00V on the monitor Observe the galvo it should correspond to the position set in 2 i e 11 If there is a discrepancy recheck the procedure as either the amplifier is faulty or there has been a wrong setting Set the Calibrate OFF switch to For recorders use the FINE gain control on the amplifier to set the galvo spot to position 1 i e a deflection of 10cm from 11 Use the TAPE potentiometer on the amplifier to set the monitor voltage to 2 00 volts At this stage the system has been calibrated for a sensitivity of 10cm volt on the recorder and 2 00 volts volt on the voltage output Set the Calibrate OFF swtich to OFF If there has been a change from the original setting of 11 on the chart scale or 0 00V on the monitor repeat the above procedure from the original preset values in order to fine tune the system Set the RUN CAL switch on the amplifier to RUN The recorder will now read directly the voltage at the input connector scaled as in 7 If the galvo spot is off scale turn the range switch on the amplifier to x 1 This will reduce the original setting by a factor of 10 thus indicating the input voltage as calibrated x 10 1996 Micro Movements Ltd
68. ompletion is achieved by connecting dummy arms within the amplifier by means of an internal switch SW2 The switch is a 6 pole 2 position type of which poles 1 2 and 3 are concerned with bridge conditioning as follows Full Bridge In this case the bridge is completed within the transducer therefore poles 1 2 and 3 should be in the Open or OFF position Half Bridge Poles 1 and 2 are ON bringing in two 499 ohm dummy arms R1 and R2 Pole 3 remains Open Quarter Bridge Poles 1 2 and 3 are ON Note that closing Pole 3 brings in R3 which is normally 120 ohms If the resistance of the single external bridge arm is different from this value R3 must be changed to match it See Typical Input Circuits Noise Operation To minimise output noise at high gains a low pass filter can be switched in by closing Poles 4 and 5 of SW2 This however has the effect of reducing the bandwidth to approximately 150Hz Ground Reference In applications where the signal source has no connection to ground e g battery operated systems it may be desirable to connect the Input LO of the amplifier to ground internally for best noise performance Pole 6 of SW2 gives this connection when switched to the ON position 1996 Micro Movements Ltd M1070 Attenuator Amplifier 4 Sensor Excitation 4 1 Transducer Supply The 3 12V DC transducer supply M1015 appears on pins 1 and 2 of the amplifier These are connected via R1 and R2 to pins 3 and
69. ope Brown connects to Live Blue connects to Neutral Green Yellow connects to Earth North America Black connects to Live White connects to Neutral Green connects to Earth Note Set voltage selector to position for local supply with fuse value as follows 220 260 VAC 0 5 amp SLO BLO 100 130 VAC 1 amp SLO BLO Signal Input The 7 pin connections for the input signals to the conditioning modules must be correctly wired Signal input pin connections are Pin Connection 1 Transducer Supply ve 2 Transducer Supply ve 3 Not connected 4 Input LO 5 Input HI 6 Auxiliary Supply Input 7 Frame Note The above connections only apply if there is a signal conditioner fitted to that particular channel Output Conditioning The M1000 12 P 16 P and 24 P cabinets have an output conditioning section accessed by a hinged cover on top of the cabinet which accepts various post conditioning cards e g active filters integrators power amplifiers etc If this section is not used it is necessary to fit Channel Completion cards type M1088 P to route the voltage and current outputs through to the rear panel D connectors Micro Movements Ltd 3 Set up M1000 Series Signal Conditioning System User Guide 3 3 4 Output Connections SIGNAL INPUTS n D C POWER LL EE wD N D C FUSE A C FUSE 2 AMP 0 5 AMP A C POWER IN Ltd Made in England Type No M1000 6 Ser No J Q
70. option designated M1080 S33 and can be identified by two orange dots on the handle See the section titled Offset Zero SW2 2 3 and 4 Filter Time Constant Range Filter Time Constant Poles Pole Poles Poles 2 3 4 open 2 closed 2 3 closed 2 3 4 closed OFF 10 kHz 75mS 35mS 15mS 5msS 2kHz 300mS 140mS 60mS 20mS 500Hz 1 58 700mS 300mS 100mS 100Hz 7 58 3 55 1 5S 500mS The units are dispatched with poles 2 3 and 4 open i e the longest time constant Other combinations of filtering can be achieved by a combination of the 3 poles of SW2 being utilised SW2 5 and 6 Internal External Cal The calibration is normally internal with SW2 5 closed and SW2 6 open In this case the calibration is derived from the power supply frequency i e 50 60Hz or 400Hz when used on DC power This calibration facility is of limited value for operation at frequencies above 1kHz A crystal controlled frequency calibrator is available the M1085 which has 9 calibration frequencies from 20Hz to 10kHz When an M1085 is fitted the calibration signal is available on pin 16 of all the modules and can be switched to the Calibration Input of the M1080 by closing SW2 6 and opening SW2 5 Note If poles 5 and 6 are both closed damage will not occur but the result will be incorrect 1996 Micro Movements Ltd 5 6 1996 M1080 Frequency D C Converter Tranducer Excitation The 12V power supply can be routed through the module to th
71. ow fully calibrated and ready for use 1996 Micro Movements Ltd M1060 High Gain Amplifier M1060 HIGH GAIN AMPLIFIER CONTENTS 1 Description 2 2 Front Panel Controls 2 2 1 Zero 3 2 2 Span 3 2 3 Tape 3 2 4 Mode 4 3 Internal controls 4 3 1 Bridge Completion 4 3 2 Low Noise Operation 4 4 Sensor Excitation 5 4 1 Transducer Supply 5 4 2 Zero Balance Range 5 5 Voltage Output Range 5 6 Specification 6 7 Typical Input Circuits 6 8 Calibration 7 8 1 Calibration Procedure 8 1996 Micro Movements Ltd 1 M1060 High Gain Amplifier M1060 HIGH GAIN AMPLIFIER 1 Description M1060 is a high gain differential input DC amplifier primarily intended for operation with strain gauges in 1 2 or 4 external arm mode load cells pressure transducers and similar low level sensors Features include high input impedance low noise and drift full input protection up to 30V differential wide dynamic range and galvanometer protection by output current limiting 2 Front Panel Controls ZE RO Zero Span Coarse Gain Span Fine Gain TAPE run Tape cal MODE Mode MM M1060 Figure 1 M1060 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 1996 Zero M1060 High Gain Amplifier This is a 22 turn potentiometer which functions as a bridge balance or input offset control Its range is approximately 20mV at the input terminals 4000 microstrain at 10
72. peration 3 3 Ground Reference Sensor Excitation 4 1 Transducer Supply 4 2 Zero Balance Range High Voltage Operation Specification Typical Input Circuits Calibration 8 1 Calibration Procedure un nn A he SB A WR WW WwW N M1070 Attenuator Amplifier M1070 ATTENUATOR AMPLIFIER 1 Description The M1070 is a general purpose attenuator low gain amplifier module for operation with high level sensors such as DC DC LVDTs servo accelerometers etc and signals generally in the 25mV to 100V range For high voltage measurements a special attenuator plug is available see documentation on C104 High Voltage Connector Features include high input impedance low noise and drift with input protection up to 125V differential 2 Front Panel Controls SHIFT RANGE Shift 0 X x10 Range Coarse 00 X100 S Range Fine _ cal i Mode MODE MM M1070 Figure 1 M1070 Front Panel 2 1996 Micro Movements Ltd 2 1 2 2 2 3 2 4 1996 M1070 Attenuator Amplifier This is a 22 turn potentiometer which acts as a back off or input offset control enabling the output to be shifted over plus and minus full scale Range The gain attenuation range of the amplifier is set by two controls coarse and fine which cover the range divide by 100 to multiplied by 100 Coarse Gain The coarse control is a 5 position rotary switch calibrated di
73. re 2 Analogue Signals m m 2 m 3 n a 4 i m 6 LS Figure 3 Current Transformer mt mi 3 4 i Noa Figure 4 High Voltage m1 3 2 3 mm 3 5 mm 4 Earthe mm 5 ml 6 mm 7 ne 7 Calibration 1996 Micro Movements Ltd M1073 R M SJb C Converter mp A a Calibration 71 Calibration Procedure it is required to calibrate the recorder for a 1V r m s input to give 10cm deflection on the galvanometer and 2 00 volts on the tape output The controls are preset to the following M1073 Front Panel Controls Shift Control 5 F Volts RMS Switch 1V Fine Gain Fully counter clockwise Tape Potentiometer Fully counter clockwise Mode Switch Cal M1086 Front Panel Controls Range Switch 5 OFF Monitor Unk Controls Range Switch 1 999V Ch No Cal Switch Ch No Galvo On Off Switch OFF Channel N Bridge Voltage Ne Bridge On Off OFF Calibrate OFF OFF Calibrate Fine x Calibrate Range l 7 Not Important N Corresponding to channel being calibrated Note On the M12 150A the Galvo On Off switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to the M1000 6 1 Recorders Only Use the galvanometer tool to rotate the spot to position 11 on the viewing scale Note If all channels are not in use itis preferable
74. rectly in gain the actual sensitivity obtained being a function of the galvanometer type Indicated Range Typical Input Voltage for 5cm deflection Max fine gain Min fine gain fully counter clockwise fully clockwise 100 75V 10 75V 7 5V xl 7 5V 750mV x10 750mV 75mV x 100 75mV 7 5mV see section 5 Fine Gain The Fine Gain control is a 15 turn potentiometer which interpolates the gain steps so that the gain is continuously variable over the switched range Tape A separate amplifier is incorporated to give a buffered voltage output from the unit to drive oscilloscopes tape recorders etc via the Voltage Output connector located on the cabinet rear panel This is adjustable by means of a 15 turn potentiometer on the module front panel up to 2V DC Mode A toggle switch enables the amplifier to be used easily in the Operational or the Calibration mode In the Operation RUN position the amplifier input terminals are directly connected to the transducer via pins 4 and 5 on the Signal Input Connector see section 8 In the Calibration CAL position the input is connected to a DC calibration voltage derived from the recorder or signal conditioning cabinet being used Micro Movements Ltd 3 M1070 Attenuator Amplifier 3 3 1 3 2 3 3 Internal controls Bridge Completion Low The amplifier may be used with resistive bridge networks in the 1 2 or 4 arm mode In the 1 or 2 arm mode bridge c
75. rop required 7 5V Therefore R29 R30 350x7 5 2 5 1050 ohms So R29 and R30 are 525 ohms each Provision is also made to reverse the excitation polarity by means of links A or B on the board or of course this may also be achieved by reversing pins and 2 on the Signal Input connector Zero Balance Range Bridge balance is set by a 22 turn potentiometer which has a nominal range of 20mV at the input 4000 microstrain for 10V bridge excitation Voltage Output Range 1996 Micro Movements Ltd 5 M1064 High Gain Amplifier The amplifier has a separate buffered voltage output which appears on the Voltage Output socket on the rear of the instrument The nominal output can be adjusted by means of the potentiometer marked Fine Gain to between 5V and 10V maximum output swing For certain applications such as driving a Tape Recorder it may be necessary to limit the output swing to 2V This may be achieved by closing Pole 6 of SW2 which attenuates the output by 5 1 The Tape adjustment can then be used for fine tuning 6 Specification Input Configuration Input Impedance Input Mode Input Range Zero Offset Range Maximum Input Common Mode Rejection Noise Up to 10KHz Drift Bandwidth 3dB Bandwidth 1dB Gain Output Voltage Output impedance Voltage Output Galvo Output Impedance Galvo Package 7 Typical Input Circuits High Gain Differential 1 Megoh
76. rworth characteristics unless otherwise specified Bessel Chebychev or Paynter can be characterised at no extra cost Description M1000 Series Signal Conditioning System User Guide Number of Poles The printed circuit board type P filters are available as 2 4 or 6 poles The two pole units have two independent filters one for the current and one for the voltage outputs The four pole filters can be on either the voltage or the current outputs but not on both The non filtered output is connected directly Both the two and four pole filters are available with an output reversing switch The 6 pole filter can be fitted to either the current or voltage output but not both This filter is a unity gain type and is fitted with a bypass switch Filter On Off Construction The suffix P denotes that the filter is a PCB and is fitted into the output stage of the amplifier cabinet Cut Off Frequency fc The Cut Off Frequency is factory preset and for the Butterworth filter the amplitude is 3dB down at fc For the Bessel and Chebychev filters the application should be discussed with the Company Changing the Cut Off Frequency The M1090 Series Filters are designed with Equal Value filter components to facilitate the change of Cut Off Frequency The Cut Off Frequency can be reduced by either increasing the filter capacitors or alternatively increasing the two filter resistors M1090 4 20 4to 20 mA converter
77. s is usually a 2 pole changeover switch connected to the amplifier input terminals In the Operation RUN position the amplifier input is connected directly to the signal source usually a transducer via pins 4 and 5 on the Signal Input connector at the rear of the instrument In the Calibration CAL position the input is connected to a calibration voltage derived from the recorder or signal conditioning cabinet There are some versions of the M1060 module which are fitted with other types of calibration facility e g Shunt cal If in doubt consult the Company 8 1 Calibration Procedure A typical calibration procedure for one channel would be as follows Take a pressure transducer with a nominal output of 40mV for full scale pressure with 10V excitation typical for an unbonded strain gauge type However it is unlikely that any particular transducer would have an output of exactly 40mV more likely it would be somewhere within 10 of this value So we look at the manufacturers calibration certificate supplied with the transducer and see that this is a 75 PSI unit which has an output of 38 68mV at 75 PSI if energised with a 10V DC supply 1996 Micro Movements Ltd 1996 M1060 High Gain Amplifier Note If energised by a different supply the output is normally pro rata but the temperature coefficient is sometimes degraded The transducer has a zero imbalance i e an output when no pressure is applied of 2 9
78. s switched from Run to Cal mode there may be a zero shift due to a change in the input conditions This can be nulled as before without any effect on the calibration 1996 Micro Movements Ltd 8 1 1996 Calibration Procedure M1070 Attenuator Amplifier A typical calibration procedure for one channel would be as follows Example It is required to calibrate the recorder for a 1 000 volts input to give 10cm deflection on the galvanometer and 2 00 volts on the Tape output Preset the controls as follows M1070 Front Panel Controls Shift Potentiometer Range Switch Fine Gain Tape Control x 10 Fully Counter clockwise Fully Counter clockwise Mode Switch Cal 6 Pole DIP switch 1 Half Bridge OFF 2 Half Bridge OFF 3 Quarter Bridge OFF 4 150 Hz low pass filter OFF 5 150 Hz low pass filter OFF 6 Ground Input Lo OFF Monitor Unit Controls Monitor Range Switch 1 999 Monitor Ch No Cal switch Cal Galvo On Off switch OFF Channel N Bridge Voltage Bridge On Off OFF Calibrate OFF F Calibrate Fine t Calibrate Range 1V di Not Important N Corresponds to channel being calibrated Note On the M12 150A the Galvo On Off switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to M1000 6 Some versions of the M1070 have a higher gain than others and in this case the range switch should be in the X1 position to give the correct gain for the example
79. sducer would have an output equivalent to ambient barometric pressure etc or a combination of both these conditions This offset can be nulled by the amplifier zero control Note 1 When the transducer is disconnected a zero offset is observed which has the opposite polarity to the sensor offset Note 2 When using the CAL mode on the M1064 the zero offset is supressed the zero control has no effect to obtain an output proportional to calibration voltage only d If a sensor is calibrated in the laboratory and then taken out and mounted on the system under test there may be a difference in the zero due to a change in the temperature or mounting stresses etc and this should simply be nulled off as in c above the calibration is normally unaffected 8 1996 Micro Movements Ltd M1064 High Gain Amplifier Mode Switch Amplifier This is a 2 pole changeover switch connected to the amplifier input terminals In the Operation RUN position the amplifier input is connected directly to the signal source usually a transducer via pins 4 and 5 on the Signal Input connector at the rear of the instrument In the Calibration CAL position the input is connected to a calibration voltage derived from the recorder or signal conditioning cabinet 8 1 Calibration Procedure A typical example calibration procedure for one channel would be as follows Take a pressure transducer with a nominal output of 40mV for full scale pressure wit
80. uently some of the technical descriptions and maintenance procedures are not explained in full For further details on Maintenance and Fault Finding please refer to the Service Manual This manual is divided into 3 main sections which cover Description Set Up Operation WARNING HEALTH AND SAFETY AT WORK MICRO MOVEMENTS LIMITED HAVE ENSURED THAT AS FAR AS PRACTICABLE ANY PERSON CARRYING OUT NORMAL MAINTENANCE OPERATIONS ON THE ABOVE SYSTEM IS NOT EXPOSED TO ANY UNDUE HAZARD FROM ELECTRIC SHOCK OR PERSONAL INJURY HOWEVER MAINTENANCE AND OR SERVICING OPERATIONS MAY INVOLVE REMOVAL OF COVERS OR DISASSEMBLY OF COMPONENTS UNDER SUCH CONDITIONS THE INTEGRITY OF THE EQUIPMENT MAY BE IMPAIRED MICRO MOVEMENTS THEREFORE RECOMMEND THAT MAINTENANCE IS ONLY CARRIED OUT BY A COMPETENT PERSON OR PERSONS CONVERSANT WITH THE HAZARDS OF WORKING WITH ELECTRO MECHANICAL SYSTEMS 1996 Micro Movements Ltd 1 Introduction M1000 Series Signal Conditioning System User Guide 2 1996 Micro Movements Ltd M1000 Series Signal Conditioning System User Guide Description SECTION 2 DESCRIPTION 2 1 2 1 1 1996 General Description The M1000 series signal conditioning cabinets are multi channel systems that can accept signals from most types of transducers These are conditioned amplified and matched to drive tape recorders lightbeam recorders computers etc The following features are included in all systems Power supplies
81. uld be as follows Example It is required to calibrate the recorder for a 1 0 volts input to give 10cm deflection on the galvanometer and 10 0 volts on the Tape output Preset the controls as follows M1079 Front Panel Controls Shift Potentiometer Range Switch Fine Gain Tape Control x 10 Fully Counter clockwise Fully Counter clockwise Mode Switch Cal Monitor Unit Controls Monitor Range Switch 1 999 Monitor Ch No Cal switch Cal Galvo On Off switch OFF Channel N Bridge Voltage j Bridge On Off OFF Calibrate OFF Calibrate Fine 4 Calibrate Range 1V Not Important N Corresponds to channel being calibrated Note On the M12 150A the Galvo On Off switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to M1000 6 Some versions of the M1079 have a higher gain than others and in this case the range switch should be in the X1 position to give the correct gain for the example 1 Use the Calibrate FINE potentiometer to set the Cal voltage to 1 000 volts on the monitor 2 Recorders only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale Note If all channels are not in use it is preferable to use the centre channels for the best optical fidelity e g Channels 3 through to 7 Micro Movements Ltd 7 M1079 Isolated Attenuator Amplifier 3 4 5 6 7 8 Set the Galv
82. un off Tape cal MODE Mode MM M1049 Figure 1 M1049 Front Panel 2 1996 Micro Movements Ltd M1049 Carrier Oscillator Amplifier and Demodulator 3 Internal controls 3 1 Calibration Level There are three calibration voltages which can be set by the DIP switches on the side of the module Switch 3 Range Pole 1 Pole 2 Pole 3 Calibration Typical Applications LOW ON OFF OFF 5mV RMS Resistance Bridge MEDIUM OFF ON OFF 20mV RMS Inductive Pressure HIGH OFF OFF ON 100mV RMS LVDTSs The amplifier has a separate buffered voltage output which appears on a socket at the rear of the recorder signal conditioning cabinet The nominal output level with a 10cm deflection on the galvanometer can be adjusted by means of the potentiometer marked Tape between 1V and 2V approximately 3 2 Zero Balance Range There are three Zero Balance ranges which can be preset by the DIP switches on the side of the module Switch 3 Range Pole 4 Pole 5 Typical Applications Fine ON OFF Bridges with a close balance within 0 2 Medium OFF ON Inductive Pressure Transducers with balance 2 Coarse OFF OFF LVDTs with balance 10 4 Bridge Completion The M1049 will operate directly with transducers in the half or full bridge mode see section 6 4 1996 Micro Movements Ltd M1049 Carrier Oscillator Amplifier and Demodulator 6 Typical Input Circuits Figure 2 Variable Reluctance Figur
83. witch for selection of required supply voltage 12VDC 24VDC 115VAC or 230VAC e DC Fuse 2 amp M100 6 5 amp M1000 12 16 24 5 x 20mm fuselink e DC Power In 2 pin connector M1000 6 4 pin XLR connector M1000 12 16 24 AC Power In standard IEC socket e Power On Off switch for instrument M1000 6 only applicable to DC or AC supply AC Fuse 0 5 amp 5 x 20mm fuselink VOLTAGE SELECTOR 24V 220 240V D C a oy 110 120y D C POWER IN AN O BEFORE INSERTING POWER CONNECTOR A C POWER IN y gt O 9 Oo Oo 1 I i D C FUSE SA SLO BLOG J A C FUSE S00mA SLO BLO 4 1996 Micro Movements Ltd C103 C104 High Voltage Connectors C103 C104 HIGH VOLTAGE CONNECTORS CONTENTS 1 Description 2 1 1 Attenuation 2 1 2 Installation 2 2 Calibration 2 3 Typical Input Circuit 3 1996 Micro Movements Ltd 1 C103 C104 High Voltage Connectors C103 C104 HIGH VOLTAGE CONNECTORS 1 Description The C103 and C104 are High Voltage input connectors for use with signal conditioning amplifier modules The C103 connector includes a 60dB balanced attenuator with an input impedance of 10 Megohms to earth on each input 20 megohms balanced The C104 connector includes an 80dB balanced attenuator with an input impedance of 100 Megohms to earth on each input 200 megohms balanced Both include a mating socket for connect
84. y on the M1085 is 500Hz The deflection for a 500Hz signal would be 10 x 500 884 5 65cm Preset the Controls as Follows M1080 Front Panel Shift Control Range Switch 2kHz Fine Gain x Tape Control Run Cal Switch CAL 6 pole DIP Switch 1 Optional Offset OFF 2 Filter OFF 3 Filter OFF 4 Filter OFF 5 Line Freq Cal OFF 6 M1085 Cal ON M1085 Front Panel Range Switch OFF Monitor Front Panel Range Switch 1 999 Ch No Cal Switch Ch No Galvo On Off Switch OFF Channel N Bridge Voltage Bridge On Off OFF Calibrate OFF j Calibrate Fine Calibrate Range Not important N Corresponding to channel being calibrated 8 1996 Micro Movements Ltd 1996 M1080 Frequency D C Converter Note On the M12 150 the Galvo On Off switch is fitted inside the Signal Conditioning access hatch on top of the instrument This feature is not fitted to M1000 6 1 2 3 4 5 6 1 Recorders only Use the galvanometer tool to rotate the galvanometer to align the spot to position 11 on the viewing scale Set the Galvo ON OFF Switch to ON Use the Shift control to adjust the voltage to 0 00V on the monitor This should correspond to the spot at position 11 on the viewing scale If not repeat step 1 Set the M1085 RANGE to 0 5kHz Adjust the FINE gain control on the M1080 to deflect the spot by 5 65 cm on the viewing scale i e Position 11 5 65 5 45 Adjust the TAPE control to read 1 130V on t

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