Harvard Research Carrier Signal Conditioner User`s Manual
Contents
1. d With resistance controls properly set push Cal Dir Avg switch to Cal position e Advance Full Scale control clockwise until desired Full Scale setting is reached f Now adjust Calibrate control to place pen on desired chart division g Return Cal switch to Dir Example For given transducer 430K ohms equal 50mmHg Install transducer and 430 K ohm R CAL resistor Turn the Full Scale switch to 1000 and switch the Bal On Off switch to Bal momentarily This balances the bridge Turn Cal Dir Avg switch to Cal position Advance Full Scale to 100 position Adjust Calibrate control to 50 F S 25 divisions Return toggle switch to Dir position Each division on recorder chart now represents 2mmHg 2 Transducer Loading a If calibration resistance is unknown it will be necessary to establish a known load or deflection at the transducer Balance transducer per Section 2 6 and apply a known load b Advance Full Scale to desired full scale setting c Now adjust Calibrate control to place pen on desired chart division and lock control d Establish no load condition at transducer e Set toggle switch to Cal position f Adjust internal CAL R and front panel Trim control until same pen deflection is achieved g Record dial setting versus load or deflection and transducer number for future calibration reference Also2. 1 V RMS for full scale output at a calibration factor of 1 Input Attenuator Inaccuracv X1 X100 internal switch 0 25 of full scale Calibration Factor Front panel duodial Range 0 5 to 10 5 Resolution 0 05 of full scale Non Linearity Auto Balance Range Resolution Non Linearity Remote Command Common Mode Rejection Leakage Current 0 25 of full scale Front panel switch indicator 0 to 10 mV RMS R amp C balance 11 bit with 18 kO R bal resistor 4 LSB out of 12 bit DAC TTL compatible gt 120 dB at 60 Hz with 350 Q unbalance from input to chassis at 100 uV sensitivity lt 10 yA RMS between any input terminal including the excitation and chassis with 120 V RMS 60 Hz applied per UL544 Maximum Safe Voltage Common Mode All 3000 and 5900 applications IEC 601 1 applications in 2000 recorders IEC 348 applications in 2000 recorders Maximum Safe Voltage Normal Mode Terminals Provided for internal Instability Zero Time Temperature Line Gain Time Temperature Line Channel 1 Output Voltage Impedance Calibration Error Non Linearity No off ground voltage allowed 150 VDC or peak AC from the input terminals to chassis 500 VDC or peak AC from the input terminals to chassis 50 VDC or peak AC between input terminals 3 bridge completion resistors 1 cal resistor and 1 zero balance resistor Most sensitive scale 30 minute warm up 0 05 of full scale 24 hrs
3. 0 1 of full scale C 0 1 of full scale 10 line variation 0 05 of reading 24 hrs 0 08 of full scale C 0 1 of full scale 10 line voltage change 0 to 5 VDC into a 2 kO load with 0 02 ufd capacitor or greater in parallel lt 5 Q short protected 0 1 of full scale 0 1 of full scale Noise Frequency Response Direct Average Attenuator Steps Inaccuracy Equivalent Input Signal Sensitivity Range Maximum Linear Input Voltage Zero Suppression Range Resolution Non Linearity Calibration Channel 2 Output Voltage Impedance Calibration Error Non Linearity Gain X1 position X10 position Noise Frequency Response Instability Direct Average Filter With 350 Q input unbalance and direct filter lt 10 UV peak to peak DC to 200 Hz 6 dB down at 200 Hz 15 DC to 0 08 Hz 6 dB down at 0 08 Hz 20 12 dB octave roll off OFF 1000 500 250 100 50 25 10 0 25 between steps Short 10 5 2 5 1 0 5 0 25 and 0 1 mV at a calibration factor of 1 gt 2 5 to 1 variation also detent X1 10 V RMS sinusoidal at 2 5 kHz 100 or 1000 referred to the input 0 05 full scale 0 25 full scale 0 1 independent of transducer phase 0 to 10 VDC into a 2 kO load with 0 02 ufd capacitor in parallel Same as channel 1 Same as channel 1 0 1 of full scale X1 gain Internal switch X1 to X10 1 mV RMS input 1 VDC output 1 mV RMS input 10 VDC output Same as channel 1 Same as chann
4. 10 4 5 010 4 With the Zero Suppression switch S104 set to 10 adjust the Zero Suppression control R102 as shown below and read channel 1 output to check for linearity Zero Suppression Channel 1 Switch Output VDC 10 00 5 0 0075 8 00 4 0 025 6 00 3 0 025 4 00 2 0 025 2 00 1 0 025 0 00 0 0 025 5 Adjust the Zero Suppression control R104 for a 2 5 001 VDC reading on the DVM and then change the Full Scale switch S101 to 500 The output on the DVM should change to 5 0 02 VDC 6 Repeat Step 5 for the other Full Scale switch settings adjusting the Zero Suppression switch and Vernier as shown below The output should be 5 0 02 VDC after switching to the next lower range Full Output Full Scale Sw Suppression Set Scale Sw Before Sw Before After 1000 10 2 5 001 500 500 10 2 5 001 250 250 10 2 0 001 100 100 1 2 5 001 50 50 1 2 5 001 25 25 1 2 0 001 10 T Remove input network and DVM
5. Signal Conditioner should be one continuous length No Splices are Permitted but mating low level signal connectors may be used if necessary Connect the double shielded signal cable pair to the Signal Conditioner signal input connector pins 11 and 12 Connect the shielded signal cable pair to the transducer excitation pins 8 and 9 as shown in Figure 2 4 Some bridges include a shunt resistor for use in calibration If so it should be connected to pin 7 and a jumper must be placed in Cal R spot see Figure 3 2 If Not Pin 7 Must Be jumpered to Pin 9 in the Input Connector Internal Cal R will be installed in Paragraph 3 5 Connect the signal cable shield to pin 10 located in the input connector and ground the signal cable shield at the transducer as shown in Figure 2 4 Note The transducer enclosure should be grounded at the transducer It is important that the signal cable shield be insulated from the metal shell of the preamplifier input connector If this is not done ground loop noise will be created by circulating currents in the signal cable shield between the transducer ground and the preamplifier chassis ground 2 9 Preamplifier Polarity l When a POSITIVE signal is applied to a transducer we would expect the pen on the recorder chart to move from chart center to the LEFT To accomplish this the transducer is connected as shown in Figure 2 4 2 Examination of Figure 2 5 will reveal that there is
6. The Harvard Research Carrier Signal Conditioner User s Manual SECTION TITLE TABLE OF CONTENTS GENERAL INFORMATION INTRODUCTION SPECIFICATIONS INSTALLATION 2 1 GENERAL 2 2 INITIAL INSPECTION 2 3 INSTALLATION 2 4 INPUT CONNECTIONS 2 5 POWER AND OUTPUT 2 6 PRELIMINARY SETUP 2 7 EXTENDING YOUR RANGE OF BALANCE 2 8 SIGNAL CABLE CONNECTIONS 2 9 PREAMPLIFIER POLARITY 2 10 THE LVDT 2 11 THE XX XXXX ADAPTER ARM 2 12 OUTLINE DIMENSIONS GENERAL 3 1 GENERAL 3 2 FRONT PANEL CONTROLS 3 3 INTERNAL CONTROLS 3 4 PLUG IN COMPONENT TERMINALS 3 5 BRIDGE CALIBRATION 3 6 OPERATION 3 7 USING ZERO SUPPRESSION 3 8 OUTPUT CHANNEL 2 PAGE 1 1 1 1 2 1 2 1 2 1 2 1 2 2 2 3 2 3 2 3 2 4 2 5 2 5 2 5 3 1 3 1 3 3 3 4 3 6 3 7 3 7 3 7 3 9 FUNCTIONAL TEST PROCEDURE 3 8 LIST OF ILLUSTRATIONS FIGURE 14 ej 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 1 3 2 3 3 TITLE XX XXXX CARRIER AMPLIFIER REAR VIEW INPUT CONNECTOR PIN CONNECTIONS CARD EDGE CONNECTIONS TYPICAL SIGNAL CONNECTIONS PREAMPLIFIER POLARITY SENSITIVITY CONTROLS TYPICAL LVDT SIGNAL CONNECTIONS XX XXXX ADAPTER OUTLINE DIMENSIONS FRONT PANEL CONTROLS INTERNAL CONTROLS TEST INPUT CIRCUIT PAGE 1 1 2 1 2 2 2 2 2 4 2 5 2 6 2 6 2 7 2 7 3 2 3 5 3 8 SECTION GENERAL INFORMATION 1 1 Introduction The Harvard Research Carrier Signal Conditioner Catalog No 60 0110 is our latest answer to balancing m
7. a polarity reversal between the preamplifier input and output This is done to compensate for the polarity reversal that occurs in Harvard pendrive amplifiers 3 POLARITY REVERSAL is accomplished by simply switching the internal switch N R from Normal to Reverse This switch inverts the oscillator output 2 10 The LVDT a A typical connection of an LVDT to the carrier preamplifier can be seen in Figure 2 7 The center coil is the driven coil and obtains its signal from the excitation output pins 8 and 9 The two pick up coils are hooked in series and sent to the input amplifier via input pins 11 and 12 b The only change in set up procedure paragraph 2 6b is the X100 X1 switch is placed in the X100 position The reason is most LVDT s have very high output usually in the volts range 2 11 The 11 5407 35 Adapter Assembly This Adapter Figure 2 8 was designed to mate Validyne type transducers with the 13 4615 35 Carrier Amplifier It will also reduce the carrier input signal by a factor of approximately 20 to 1 to accommodate the relatively high Validyne transducer outputs 2 12 Outline Dimensions Preamplifier outline dimensions are shown in Figure 2 9 SECTION III OPERATION 3 1 General This section describes and illustrates the controls of Carrier Amplifier models 13 4615 35 13 G4615 35 and 20 4615 35 and provides complete operating instructions 3 2 Front Panel Controls Item numbers listed below refer to circled numb
8. c portion to obtain more useful information 3 8 Output Channel 2 Channel 2 was primarily designed to provide a signal for digital display and operates regardless of the position of the attenuator Its full scale output is 0 to 10 VDC and is located at pin J on the XA 201 output strip With the use of switch S 2A internal you can change the sensitivity of channel 2 by a factor of 10 With ImMVRMs input the output will be 1 VDC in the x1 position or 10 VDC in the x10 position With switch S 2B you can change the output from direct D to average A DC display 3 9 Functional Test Procedure This procedure should be performed to verify operation and calibration of the unit If calibration is required refer to Section V of this manual l Connect two 350 ohm resistors to the input connector as shown in Figure 3 3 below Monitor channel 1 output XA201 2 with a DMV 2 Set the Calibrate control R103 fully CW and the Full Scale switch 101 to 1000 Set the Sensitivity control R104 fully CW to the x1 position 3 Set the Zero Suppression switch S104 to 10 and adjust the Zero Suppression Vernier R102 for a reading of 4 5 001 VDC on the DVM and lock it Turn the Zero Suppression switch S104 through its various positions The output on channel should be shown below Zero Suppression Channel 1 Switch Output VDC 10 4 5 001 45 010 OFF 0 010 1 45 010
9. cation occurs see Note below NOTE Your system will allow you to balance a 40 mV input error signal This figure is arrived at by multiplying the amplifier gain at 10 mV with 18 kQ R Balance Resistor and the Calibrate setting of 4 If lower sensitivities are required a higher number can be adjusted on the Calibrate control and or X100 XI switch can be moved Your total range of operation is from 10 mV to 10 V You can now change the FS attenuator to your desired sensitivity Also the calibrate control for proper amplification 2 7 Extending Your Range of Balance This Signal Conditioner has a gain of about 2 5 to 25 controlled by the front panel calibration control Figure 2 6 shows the controls used to change the sensitivity 2 7 1 The Signal Conditioner as stated has an allowable 10 mV input signal range because of the 18 kQ resistor in the R Balance position If it is necessary to increase the sensitivity to 1 mV we install a 1 3 kQ resistor call for details The formula for computing the R balance resistor is 45 54 e in Rbal 0 035 e in Where R bal is in kQ and e in is in volts E in is the desired balance range and should be limited to lt 0 025 V You should remember that the higher the R balance resistance the more coarse the balance will be 2 8 Signal Cable Connections Use a four conductor double foil shielded signal cable Belden No 8434 or equivalent The cable run from the transducer to
10. easuring and amplifying low level signals from carrier excited transducers such as strain gages variable differential transformers or reluctance type transducers The unit supplies an adjustable 1 to 10 volt RMS 2 5 kHz signal for transducer excitation Provision has been made internally for bridge completion resistors if one or two active bridge transducers are used The main unit features are Automatic Phase Control and Automatic Zero Balance on comma Remote Automatic Balance is available through the output connector Another new feature is the Master Slave Synchronization Switch This is used when you are using more than one carrier amplifier One amplifier is selected as the master and the others as slave This eliminates interaction between the oscillators in each of the carrier units The amplifier has two outputs Channel number one s output is 0 to 5 VDC with zero suppression and variable gain from 20 to 50 000 This channel is used primarily to furnish a signal to the 2000 series recorder Channel number two provides a 0 to 10 volt output with a variable gain from 100 to 10 000 This output is set up for digital displays etc Both channels have direct and average filtering available with corner frequencies of 200 or 0 05 Hz with 12 db octave roll off 1 2 Specifications Amplifier Input Circuit Configuration Full floating and differential Input Impedance 1 MOQ at 2 5 kHz floating and guarded Measurement Range 100 pV to
11. el 1 Same as channel 1 Internal switch switch is overridden to direct position when the front panel Cal Dir Avg switch is placed in Cal position Transducer Excitation Voltage Internally adjustable from 2 to 10 V RMS maximum load 0 250 W Frequency Total Harmonic Distortion Phase Demodulator Synchronization Phase Reference Normal Reverse Amplitude Instability Time Temperature Line Load Regulation Power Requirements Accessories 2500 Hz 5 sine wave lt 0 25 at 5 V RMS amplitude Automatic in phase with signal Jumper selectable master to 7 slaves 0 or 90 internal switch selectable Internal switch selectable With 30 minute warm up 0 02 24 hrs 0 1 C with 350 Q load 0 01 10 line voltage change 20 no load to full load with a 350 Q load 15 VDC at 125 mA 15 VDC at 125 mA 13 VAC at 60 Hz at 200 mA 11 5407 50 Mating Connector 11 5407 35 Transducer Adapter Validyne LVDT 696238 Starter Kit 887291 Board Asm Extender R1 288308 13500 Resistor 242878 121 Resistor Bridge 242878 351 Resistor Bridge 25 265969 15001 Resistor Balance 25 265969 50001 Resistor Balance SECTION Il INSTALLATION 2 1 General This section describes the checks and inspections that should be made upon receiving Harvard s 60 0110 Research Carrier Signal Conditioner It covers installation signal input connections and outline dimensions 2 2 Initial Inspection Prior to attempting any electrical con
12. ers in Figure 3 1 ITEM CONTROL DESCRIPTION 1 Full Scale Attenuator Sets the Full Scale output of Channel 1 S 101 the amplifier in 7 steps from 10 to 1000 2 Cal Dir Avg S 102 Direct for normal operation Average for normal operation Calibrate to obtain a deflection without a mechanical load change 10 Bal ON OFF S 103 sets and locks the balance signal brings the balance and error signal from the amplifier Allows Zero Suppression Channel 1 X100 switch S 104 10 x 100 1000 suppression Vernier R 102 can be locked in any position major divisions For use with Calibrate Channels 1 and 2 R 103 Set 5 to 10 5 Sensitivity Channel 1 R 104 Provides a 25 1 Signal Change Trim Calibrate Resistor R 101 amount of correction can be switch Bal Indicator DS 102 balancing of the amplifier When Phase Indicator DS 101 excitation to signal phase shift function of the internal switch 3 3 Internal Controls Item number listed below refer to those in Figure 3 2 ITEM R 5 CONTROL Gain Control Channel 2 Channel 2 BAL A momentary toggle it ON for normal operation it signals together OFF removes only the balance checking Phase Lock A 5 position switch OFF 1 x 100 100 suppression and A ten turn adjustable control that The dial is graduated into 10 item 4 A 10 turn vernier resistor that sets the overall gain Gage factor A lockable variab
13. lances U42 Slave Amplifier to CMR adjustment in the X 100 Gain adjustment of the input CMR adjustment or balance of position R 89 S 1 100K S 2A Gain Control Channel 1 proper level Input Attenuator X1 X100 by 100 so instead of 10 to 1000 FS Channel 2 Gain X1 X10 only by a factor of 10 3 3 Internal Controls continued ITEM S 2B switched S 3A For CONTROL Channel 2 Dir Avg Filter Channel 2 in Dir or Avg mode Channel 2 goes to Dir regardless Excitation Norm Rev Phase switch reverses the phase of the Excitation 0 Degree 90 Degree Phase be 0 Degrees with resistive Phase shift may be is available 3 4 Plug In Component Terminals Sets the gain of Channel 1 to its This switch multiplies the input we would have 1000 to This switch multiplies Channel 2 DESCRIPTION By this switch you can operate independent of Channel 1 when the Cal Dir Avg is to Cal Just as the name implies this oscillator Normal operation would type Transducers other configurations a necessary and Item numbers listed below refer to those on Figure 3 2 Jumper Jumper ITEM R1 R2 R3 Cal R R 4 E1 E2 Normal E2 E3 Reverse DESCRIPTION Bridge completion Bridge Shunt Calibration Calibration polarity reversal Reverses calibration only Jumper E4 E5 Master Synchronization One unit must be master all others should be slave Jumper ES5 E6 Slave Balance Resistor no
14. le resistor that sets the gain of Channel only from X1 This resistor is placed in series with Cal R so that a small adjusted when using the Cal Green light is ON during the Bal switch is activated Yellow light goes on when the exceeds 45 or 90 as a S3B DESCRIPTION Adjustment to set the gain of R 9 R 10 control R 11 R 13 R 14 R 15 R 16 R 17 to R 82 R 84 R 85 R 88 Zero Control Channel 1 Phase Zero amplifier X10 Zero Suppression X10 suppression circuit X1 Zero Suppression suppression circuit Negative Zero Suppression adjusted the negative component Quad Zero adjustment Phase Balance amplifier Quad Balance amplifier Slave Phase amplifier Used to produce Excitation Span oscillator Slave Balance of the power supply for U 1 Slave Zero zero Input X100 CMR position Input X100 Gain amplifier in the X100 position Input X1 CMR the first stage amplifier in the X1 Zero adjustment for Channel 1 Zero adjustment for the Phase Calibration adjustment for the Calibration adjustment for the X1 Once the positive suppression is is brought in with this Quadrature amplifier zero Balance control of the phase Balance control of the quadrature Phase control of the Slave 2 5KHz signal for the bridge Adjusts the output of the Balances the ripple component against the oscillator output the transducer Ba
15. nections or operation visually examine the unit for broken or loose knobs dented or nicked panels and broken or chipped rear connectors 2 3 Installation The 60 0110 Research Carrier Signal Conditioner may be mounted directly in Harvard s Pressurized Ink and Thermal Pen Recorders or Harvard s 8 4 and 2 Channel Research Signal Conditioner Cases for use with other recorders 2 3 1 Insertion Paragraph 2 6 Preliminary Set Up must be completed before insertion To install the Signal Conditioner into the appropriate slot a Slide the Signal Conditioner into the enclosure until the rear output card edge connector is engaged See Figure 2 1 REAR VIEW b Tighten the rear retaining screw until the Signal Conditioner front panel is flush with the edge of the enclosure Do Not Overtighten This locks the Signal Conditioner into the enclosure c Connect the input signal connector and secure it by grasping the rear of the connector and pushing it onto the female connector after vertical alignment of the blue index mark When a click is heard or an orange ring appears the connector is locked in place 2 3 2 Removal a Disconnect the input connections with a counterclockwise turn to the connector and pull b Loosen the rear retaining screw The Signal Conditioner will move forward abut 1 8 of an inch c Carefully slide the entire Signal Conditioner out of the recorder or signal conditioner case 2 4 Input Connections Figure 2 2 show
16. note total resistance Cal R and Trim are in series in the Cal position Part 3 below tells how to measure Example For a typical transducer apply a pressure of 100mmhg Rotate Full Scale to 250 position Adjust Calibrate control to set pen to 40 F S 20 division 2VDC output Each chart division now represents 5nmHg Vent transducer to air and push toggle switch to Cal position Adjust value of CAL R and front panel Trim control until same output is achieved Note total resistance 3 Calculating Calibration Resistance The proper calibration resistance Rcal can also be calculated using the following equation R output resistance of transducer in ohms F transducer calibration factor in microvolts open circuit per volt excitation per cmHg Example Determine the calibration resistance necessary to calibrate a Statham P23 DB for 10 cmHg when given The calculated value is obtained by inserting a 1 4 resistor which is between the calculated value minus 5K ohms The front panel Trim control is then adjusted until the desired resistance is achieved measuring across El and E3 with a precision ohmmeter CAL R and the TRIM pot are in series and the TRIM pot has a max R of 10K ohms 3 6 Operation Install the amplifier in its frame and properly lock it in place Turn the power on for warm up approximately 15 minutes Connect the transducer to the input connector Turn the Full Scale c
17. ontrol to Off and the Bal On Off switch to Off Calibrate control to 1 0 unless otherwise determined Sensitivity to X1 detent Zero suppression Off Cal Dir Avg to Dir Turn on the chart drive and set pen position to chart center Switch Bal On Off to On Switch Full Scale to 1000 Now switch Bal On Off momentarily to Bal When the green and yellow lights go off your unit is in balance You may advance the F S switch to a more appropriate sensitivity level Your unit can now be Cal ed as in Par 3 5 and you will then be ready for operating 3 7 Using Zero Suppression Zero suppression permits the steady state component of a complex signal load to be suppressed allowing the dynamic portion to be amplified and recorded in greater detail a Set up the bridge as described in paragraph 3 5 b Turn Zero Suppression Vernier to 1 00 1 turn CW from full counterclockwise position c Apply a load to the strain gage and rotate the Full Scale control until the pen approaches chart edge d Set the Zero Suppression item 4 control to the appropriate range and polarity Pen should move back toward zero e Advance Zero Suppression Vernier dial clockwise until pen approaches chart zero f Advance Full Scale control clockwise until desired sensitivity is reached keeping pen to chart zero with Xero Suppression Vernier g The load now may be varied around the stati
18. rmally set for 10mV offset 18Kohms 3 4 1 Optional Filtering For noisy environments a means of changing the filter frequency of 200 Hz 6 Db down at 200 Hz 15 is provided Both C 10 and C 11 must be changed Use Figure 3 2 to determine their location For Frequencies other than 200 Hz C 10 and C 11 values may be calculated using the following formula 3 5 Bridge Calibration After completing installation and setup instructions in Section 11 the unit may now be calibrated Three methods of calibration are used and are described below l Known calibration resistance a given resistance equals a given mount of mmHg micro inches per inch Ibs sq inch etc 2 Transducer loading 53 Calculating calibration resistance All three methods will be described in detail User must determine most convenient method Note If your bridge includes a Shunt R for calibration just place a jumper in the Cal R spot in the following steps 1 Known Calibration Resistance a Install transducer b If calibration resistance is known simply insert correct calibration resistor where marked CAL R and if necessary adjust the front panel trim control for exact resistance reading Internal Cal Resistor and the front panel trim control are additive Part 3 below tells how to measure c Turn Full Scale switch to 1000 and switch the Bal On Off switch to Bal momentarily This balances the Bridge
19. s the pin connections located at the rear of the Carrier Signal Conditioner For the convenience of the user a mating guarded 12 pin Deutsch Input Connector is supplied Catalog No 60 0109 See Paragraph 2 8 for a typical wiring diagram PIN FUNCTION 11 Signal 12 Signal 8 Excitation 9 Excitation 7 Shunt Cal 10 Isolated Common 2 5 Power and Output Output and power connections are made through a 16 pin card edge connector Refer to Figure 2 3 for wired connections These connections to the recorder are already made inside the system PIN FUNCTION 1 Common 2 Channel Recorder Out 3 15 Volts 4 15 Volts 5 Signal Common H J Master Slave Sync Common 13 Volts AC 13 Volts AC N C Channel 1 Output Remote auto Balance Signal N C Channel 2 Output Commons are tied on board to chassis ground 2 6 2 5 1 Multi Carrier Operation Operating more than one Carrier in a system may require a synchronizing lead That is pin 6 of all the carrier channels are wired together One Carrier Signal Conditioner is selected as master and the masterslave jumper is left at E4 E5 see Figure 3 2 All other amplifiers are considered slaves and the jumper is moved to ES E6 Preliminary Set Up 2 6 1 External Control Adjustment Adjust the external controls to the following settings Control Setting Full Scale OFF Cal Dir Avg Dir Bal ON OFF ON Zero Suppression OFF Calibra
20. te 4 Sensitivity At detent X1 2 6 2 Internal Control Adjustment Reference Sections 3 3 and 3 4 Remove right hand cover Check for jumpers at El E2 and E4 E5 Adjust the controls as follows Switch Position SI X100 X1 XI S2A Xl x10 X10 S2b D A D S 3A N R N S 3B 0 90 0 2 6 3 To Complete the Set Up Assuming your transducer is a 4 active element type follow this set up to completion If your si a 1 or 2 active element type add bridge completion resistors Install the Carrier Signal Conditioner in the proper channel Plug in the cable from the transducer you are going to use Make sure the transducer is in an at rest position no load The excitation is set at the factor at 5 V RMS with a load see Section 5 Calibration If necessary the excitation voltage can be set between 2 and 10 V RMS by adjusting R 16 and monitoring TP 10 and 11 Turn power on to the recorder and the Signal Conditioner Allow for a 15 minute warm up period Adjust the pen position to the center of the channel Turn the F S control to 1000 Switch the Bal ON OFF switch to Bal Hold momentarily The Phase light and then the Bal light will glow and the pen will return to the chart center Your system is now balanced If your system is unable to be balanced and oscillation will occur The pen will swing to the edge of the chart and then back towards the middle slowly about 2 cps but will not go to the center If this indi
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