Encore 635-002 Manual Download Page 1

 

                        

MANUAL

MODEL 635-002

STRAIN GAGE AMPLIFIER

INDEX

2...................DESCRIPTION
3...................I. SPECIFICATIONS: AMPLIFIER MODULE
5...................II. SPECIFICATIONS: RACK ADAPTER ASSEMBLY
6...................III. SPECIFICATIONS: POWER SUPPLY
7...................PCB JUMPER ASSIGNMENTS
8...................BRIDGE MODES, FIGURE 1
9...................CIRCUIT DESCRIPTION
10-13............PIN-OUT TABLES
14.................SET-UP PROCEDURE
16.................ACCEPTANCE TEST PROCEDURE
17.................ACCEPTANCE TEST DATA SHEET
19.................SCHEMATIC: AMPLIFIER MODULE D13555
20.................SCHEMATIC: POWER SUPPLY C13597
21.................FRONT RACK: ASSEMBLY 4007-137
22.................REAR RACK: ASSEMBLY 4007-137
 

                          

Reviewed 3.24.03 mbz

1

Summary of Contents for 635-002

Page 1: ...CIFICATIONS POWER SUPPLY 7 PCB JUMPER ASSIGNMENTS 8 BRIDGE MODES FIGURE 1 9 CIRCUIT DESCRIPTION 10 13 PIN OUT TABLES 14 SET UP PROCEDURE 16 ACCEPTANCE TEST PROCEDURE 17 ACCEPTANCE TEST DATA SHEET 19 SCHEMATIC AMPLIFIER MODULE D13555 20 SCHEMATIC POWER SUPPLY C13597 21 FRONT RACK ASSEMBLY 4007 137 22 REAR RACK ASSEMBLY 4007 137 Reviewed 3 24 03 mbz 1 ...

Page 2: ...s provided to select the bridge configuration including 1 4 static 1 2 static 1 4 dynamic and full bridge An additional position selects the EMF input mode for operation of the amplifier as a high performance general purpose differential amplifier Each module front panel provides two LED indications one for output signal limit and the other for auto balance status The balance LED will light during...

Page 3: ...PLETION Front panel toggle selects either 120 ohm or 350 ohm completion resistors in the 1 4 and 1 2 STATIC modes AUTO BALANCE The AUTO BALANCE function is remotely activated for all modules simultaneously with a zero level on a rear panel BNC or a push button on the power supply module Individual modules can be activated with a front panel push button Resolution 2 1 mV V of excitation at G 1000 R...

Page 4: ...ernier adjusts between fixed gains FREQUENCY RESPONSE Front panel switch selects 3 pole Butterworth low pass filter with nominal 3dB points at 200 500 5000 16000 and 32000Hz Frequency response in the filter OUT position is 100KHz The frequency response of the DC channel is 11Hz nominal COMMON MODE VOLTAGE 10V Max CMRR 100dB DC to 70Hz DC coupled 80dB 70Hz AC coupled 80dB 1KHz DC coupled MONITOR OU...

Page 5: ...er module These outputs are used for driving low impedance loads with high shunt capacitance cables ie 50 ohms 056uf DC OUTPUTS Seven 3 pin bulkhead connectors per rack connect to the output of the fixed DC channels BRIDGE AMPLIFIER INPUT One 6 pin bulkhead connector per amplifier channel for interfacing the strain gages to their respective amplifiers CAL One insulated BNC per rack accepts externa...

Page 6: ... These voltages are routed through the PC connector to each amplifier module where they are regulated as needed MECHANICAL The power supply module is 7 H x 2 8 W x 12 D and weighs 4 5 lbs ELECTRICAL INPUT 115V 10 50 60 Hz 0 8A Max OUTPUT Eight unregulated transformer isolated DC outputs as follows 1 24VDC at nominal line and full load 1 2A MAX 1 24VDC at nominal line and full load 0 6A MAX 7 24VDC...

Page 7: ...al J5 Remains connected except to disable the external CAL command J6 Gain Select jumper for DC ONLY auxiliary channel J7 Connects P CAL to P J8 Connects S CAL to S J9 Selects positive or negative going shunt CAL output signal J10 Connects S CAL to S J11 Connects P CAL to P J12 Connects P to R for 1 4 or 1 2 STAT modes when using 2 wire gages Remove for 3 wire gages Disconnect J7 8 10 and 11 to al...

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Page 9: ...ed and retains its status until another balance request occurs An on board lithium cell BT1 prevents loss of this status when the amplifier is off If the battery is weak the BAL LED will light when the amplifier is turned on This does NOT mean the balance has been lost but the battery is due for replacement When an autobalance cycle is initiated the BAL LED will light until balance is achieved and...

Page 10: ...NECTOR PT02A 10 6S PIN ASSIGNMENT A P BRIDGE B P BRIDGE C R BRIDGE SHIELD D S BRIDGE E S BRIDGE F CHASSIS GROUND MATES WITH PT06A 10 6P SR DC CHANNEL OUTPUT CONNECTOR PIN ASSIGNMENT A DC OUTPUT B COMMON C SHIELD GROUND MATES WITH PT06A 8 3S SR ...

Page 11: ... GND PLANE 4 S D 5 S E 6 S F 7 S SENSE H 8 P SENSE J 9 P SENSE K 10 MONITOR OUT L 11 DC OUT M 12 BUSS N GND PLANE AMP COM 13 BAL P 14 TAPE OUT R 15 24 AMP BUSS S 16 COM AMP BUSS T 17 24 AMP BUSS U 18 24 ISO V BATT BACK UP 19 EXT CAL COMMAND BUSS W 20 24 ISO X ISO 24V COM 21 EXT CAL HI Y EXT CAL LO 22 P Z N C ...

Page 12: ... 3 D 4 E 5 F 6 G CHANNEL 7 MONITOR OUTPUT HIGH H OUTPUT COMMON J CHASSIS GROUND K CHANNEL 1 BRIDGE P L 2 M 3 N 4 P 5 R 6 S CHANNEL 7 BRIDGE P T COMMON U CHASSIS GROUND MATING CONNECTOR PT06A 14 18P SR COMBINATION RACK OUTPUT CONNECTORS PIN ASSIGNMENT A OUTPUT HIGH B OUTPUT COMMON C CHASSIS GROUND ...

Page 13: ... ISO 24 1 4 ISO 24 1 D ISO COM 1 5 ISO 24 2 E ISO 24 2 6 F ISO COM 2 7 ISO 24 3 H ISO 24 3 8 J ISO COM 3 9 K 10 L 11 ISO 24 4 M ISO 24 4 12 N ISO COM 4 13 P COM GND SW 14 ISO 24 5 R ISO 24 5 15 S ISO COM 5 16 ISO 24 6 T ISO 24 6 17 U ISO COM 6 18 ISO 24 7 V ISO 24 7 19 24V W ISO COM 7 20 X 24 COM 21 Y 24V COM 22 24V Z ...

Page 14: ...0 17 300 12 000 34 600 11 88K 5000 14 309 10 000 28 618 20 000 57 236 MICROSTRAINS S Rg x 106 x N GF Rcal Rg 4 Set the excitation voltage to the desired value The higher the voltage level the higher the sensitivity but the greater the likelihood of thermal instability from bridge heating 5 Monitor the amplifier output at the appropriate tape output BNC on the rear of the rack adapter With the mode...

Page 15: ...d data frequency band This will minimize white noise at the output 11 The amplifier is now zeroed the bridge if applicable is balanced and the gain is calibrated The operating mode gage excitation frequency response and the bridge configuration have been selected The system is ready to make strain measurements NOTE 1 Set the GAIN for steps 6 7 and 8 to an arbitrary level After the gain is calibrat...

Page 16: ...n 2 of indicated value For the DC channel apply 100MVDC to the EXT CAL BNC The gain should be X100 within 1 5 CMRR With the BRIDGE EXCITATION OFF and the Power Supply in its grounded position connect a short between S and S and apply 20V PK PK from the shorted junction to ground Pin F At 70Hz the output voltage should be less than 0 2V PK PK 100dB and at 1KHz it should be less than 0 7V PK PK 80dB...

Page 17: ...IER AUTO BALANCES UNSUCCESSFUL BALANCE INDICATION AUTO BALANCE WITHIN _________mV 4 0 GAIN 1 2 5 10 20 50 100 200 500 1K 2K 5K MAIN CHANNEL DC CHANNEL 5 0 CMRR FREQUENCY Vo PK PK 70Hz ______________ 1KHz ______________ 6 0 FREQUENCY RESPONSE 200 500 5K 16K 32K OUT OK MAIN CHANNEL LOW PASS MAIN CHANNEL AC HIGHPASS __________________ DC CHANNEL LOWPASS __________________ 7 0 EXCITATION VOLTAGE RANGE...

Page 18: ..._________ 10 0 CAL RESISTOR VALUES 11 88K POSITION ____________________ 19 88K POSITION ____________________ 49 00K POSITION ____________________ 99 00K POSITION ____________________ MAY VARY SLIGHTLY DUE TO OTHER CIRCUITRY 11 0 GAIN VERNIER GAIN CW 0dB GAIN CCW dB 12 0 MECHANICAL INSPECTION ...

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