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DOCUMENT EDVIM4418 REVISION B

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Instruction Manual

4418 Bridge Signal Conditioner

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Summary of Contents for 4418

Page 1: ...DOCUMENT EDVIM4418 REVISION B Page 1 of 14 Instruction Manual 4418 Bridge Signal Conditioner ...

Page 2: ...e at his own expense In order to maintain compliance with FCC regulations shielded cables must be used with this equipment Operation with non approved equipment or unshielded cables is likely to result in interference to radio television reception This equipment is not designed to be used in potentially explosive environments It should not be used in the presence of flammable liquids or gases This...

Page 3: ...r 5 2 3 3 Battery Charge Indicator 5 3 Operation 3 1 Transducer Connection 6 3 2 Output Connection 6 3 3 Gain Setting 6 3 4 Filter Selection 6 3 5 ZMO Adjustment 7 3 6 Battery Charging 7 4 Maintenance Calibration and Repair 4 1 4 1 1 Equipment Required 8 4 1 2 Preliminary Instructions 8 4 1 3 Check Procedure 9 4 2 Repair 9 4 3 Battery Replacement 9 5 Frequency Response Curves Gain 1 11 Gain 10 12 ...

Page 4: ...m of a 10 VDC Excitation voltage Bridge balance or Zero Measure and Output ZMO adjustment is provided by means of a control Offset mounted on the rear panel Note No internal provision is made for bridge completion resistors If a half bridge transducer is to be used bridge completion resistors must be added externally 2 1 2 Status An indicator on the front panel shows the status of the input if a t...

Page 5: ...ators in turn and the filter indicator 2 3 2 Low Battery Indicator The battery Low indicator is on the front panel and will be lit Red when the battery reaches a pre determined discharge level At this point it is recommended that the charger be connected If the charger is not connected at this point the unit will continue to function until a second predetermined battery discharge level is reached ...

Page 6: ...termines the acceleration range available from the system and the output sensitivity e g for an accelerometer having a sensitivity of 10mV g pk and the maximum output of the 4418 being 10V pk Gain 1 Range 1000g Output sensitivity 10mV g Gain 10 Range 100g Output sensitivity 100mV g Gain 100 Range 10g Output sensitivity 1000mV g 3 4 Filter Selection A second order low pass filter is selected by dep...

Page 7: ...utomatically switch into Stage 2 Stage 2 Top Off Mode Top Off Mode will deliver sufficient charge to top up the battery to 100 of its capacity in approximately 45 minutes Once 100 capacity has been achieved the charge indicator will extinguish In the event of a fault with the battery charging circuit or the battery pack itself the charge indicator will be lit Red In this event please contact your ...

Page 8: ...g or malfunctioning it can be checked by use of the following circuit This circuit should also be used when performing a calibration of the unit Note To verify the LF response of the signal conditioner it will be necessary to increase the value of the capacitor Fig 5 Test Circuit 4 1 1 Equipment Required Signal Generator AC DC DMM Oscilloscope 5 2 3 4 1 ...

Page 9: ...ort circuit With the short circuit applied set the DMM to DC volts and with a gain of x1 adjust the bridge balance control Verify the output of the 4418 varies between 30mV to 30mV To verify the DC performance set the signal generator to DC volts and apply the same 50 mV dc level Note With the generator set to 0V adjust the bridge balance control for 0V at the output before applying the DC signal ...

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Page 11: ...DOCUMENT EDVIM4418 REVISION B Page 11 of 14 TYPICAL FREQUENCY RESPONSE CURVES ...

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