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iii

List of Tables

Table Title Page

1-1. Symbols..................................................................................................................

1-2

6-1. Failure

Diagnosis ...................................................................................................

6-2

6-2. Resistance

Measurements for the Windings .......................................................... 6-4

7-1. RUSKA 2413 Differential Pressure Cell - Parts List ............................................. 7-4

7-2. RUSKA 2417 Differential Pressure Cell - Parts List ............................................. 7-5

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Содержание RUSKA 2413

Страница 1: ...ke Corporation All rights reserved Printed in USA Specifications are subject to change without notice All product names are trademarks of their respective companies RUSKA 2413 2417 2416 Differential Pressure Null Indicator Users Manual ...

Страница 2: ...rvice center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was caused by neglect misuse contami...

Страница 3: ... to Gas 2 1 Liquid to Liquid 2 1 3 Preparation for Use 3 1 Preparation for Use 3 1 Bleeding Lower Chamber in a Liquid To Liquid System 3 2 4 Operation 4 1 Operating Instructions 4 1 5 Performance Observations 5 1 Actual Sensitivity versus Apparent Sensitivity 5 1 Calibration 5 1 Detecting Leaks 5 2 6 Maintenance 6 1 Servicing the Instrument 6 1 Diaphragm 6 1 RUSKA 2413 Differential Pressure Null I...

Страница 4: ...1 RUSKA 2413 Differential Pressure Null Indicator Parts List 7 1 RUSKA 2417 Differential Pressure Transducer Parts List 7 5 RUSKA 2417 706 Differential Pressure Cell 40 000 PSI Parts List 7 5 8 General Information 8 1 Introduction 8 1 9 Functional Circuit Description 9 1 Introduction 9 1 0 Test Procedure 1 Introduction 1 Setup Procedure 1 Appendices A Explanation of Test Report A 1 ...

Страница 5: ...Table Title Page 1 1 Symbols 1 2 6 1 Failure Diagnosis 6 2 6 2 Resistance Measurements for the Windings 6 4 7 1 RUSKA 2413 Differential Pressure Cell Parts List 7 4 7 2 RUSKA 2417 Differential Pressure Cell Parts List 7 5 ...

Страница 6: ...RUSKA 2413 2417 2416 Users Manual iv ...

Страница 7: ...v List of Figures Figure Title Page 7 1 RUSKA 2413 711 Differential Pressure Null Indicator Side View 7 2 7 2 RUSKA 2413 711 Differential Pressure Null Indicator Top View 7 3 ...

Страница 8: ...RUSKA 2413 2417 2416 Users Manual vi ...

Страница 9: ...apore 65 738 5655 Anywhere in the world 1 425 446 5500 Or visit Fluke s website at www fluke com To register your product visit http register fluke com To view print or download the latest manual supplement visit http us fluke com usen support manuals Safety Information W Warning The control box null indicator must be set for the proper line voltage prior to connection to a power source Symbols Us...

Страница 10: ...the instrument is intended as a null sensor indicator with which the pressure of one medium may be precisely adjusted to that of another Some of the advantages of the instrument are its high sensitivity high working pressure 15 000 psi for RUSKA 2413 Series cells and 40 000 psi for RUSKA 2417 Series and its ability to withstand the full working pressure across the diaphragm without injury 15 000 p...

Страница 11: ... Temperature Range 40º F to 160º F Construction Details and Parameters Note Replacing diaphragm or transformer voids calibration Change in Null with Working Pressure See Specifications The stress from the applied pressure produces a displacement of the core within the transformer even though the pressure across the diaphragm may be zero The displacement results in a shift of the apparent null with...

Страница 12: ...eries RUSKA 60 degree cone with 3 8 24 straight thread male cone on fitting female cone in body of cell Adapters are provided to go to DH500 equivalent to AE F250C HIP HF4 For RUSKA 2417 Series DH500 equivalent to AE F250C HIP HF4 Values shown under this heading are nominal at time of this publication and are not to be considered as binding specifications They are subject to change with improvemen...

Страница 13: ...oxygen Liquid to Liquid The Differential Pressure Transducer may be employed as a null detector between two liquid systems For instance when calibrating elastic sensors prepared for oxygen service it is sometimes more convenient to use a liquid pressure medium than to use a gas The liquid medium of course must be chemically inactive in the presence of oxygen in all concentrations Mixtures of the v...

Страница 14: ... purpose of directly connecting the two gags while making preliminary balancing adjustments When the two gages are at pressure and approximately balanced the valve is opened and the electrical zero adjusted The valve is then closed and the balancing operation continued while observing the residual pressure difference on the meter As the pressures become more nearly equal the valve is opened to ver...

Страница 15: ...ormer core the performance will be erratic The fact that the air bubbles dissolve in the liquid when the pressure is increased may be used to an advantage With the vent plug removed the liquid is pumped into the upper chamber until it appears at the vent port The plug is replaced and the pumping continued until the pressure in the liquid system reaches 150 bar 2175 psi At this pressure the entrapp...

Страница 16: ...f air remaining in the cell In these experiments the gage pointer must not be resting against a pin at zero pressure It is obvious that pressurizing the opposite cavity will prevent the flexible diaphragm from spoiling the experiment It is not difficult to keep the free air in the differential pressure transducer below 0 05 cc Bleeding Lower Chamber in a Liquid To Liquid System When charging the s...

Страница 17: ...Before starting a measurement on a liquid to gas system the differential pressure transducer is intentionally over ranged in the direction proposed by the adopted procedure i e from the liquid side The pressure is allowed to remain for a minute or so and then released In some manner the liquid system must be opened to atmosphere at a point level with the diaphragm An open tube manometer valve open...

Страница 18: ...s up its excess heat The net effect is an unstable condition in which the indicator will signal a continuous reduction in the gas pressure as through the system were leaking For rather large changes in the pressure level the balance indication will approach a high state of excitement for the first minute or so Complete stabilization will require a period of up to one hour but for calibration purpo...

Страница 19: ...ed pressure increment tend to move the diaphragm as before but the forces resisting the motion are greater than before As the diaphragm moves the volume of the single ended system is reduced and its pressure increased The ΔP that was applied to the diaphragm is automatically diminished and the instrument sensitivity appears to be less than before An example of the extreme case is one in which the ...

Страница 20: ...ure level of operation the dial is changed by an amount obtained from the calibration curve The curve is plotted as the change in dial units as a function of operating pressure Usually it is necessary to decrease the dial registration as the pressure is increased The advantage of maintaining a more uniform volume of the sample by accepting the method of calibration just described outweighs the con...

Страница 21: ...will cause a perforation The diaphragm must of course be replaced A perforated diaphragm may be detected from one or more of the following symptoms 1 Liquid to Gas System a Otherwise unexplained presence of gas in the liquid portion of the cell b Continuous increase in liquid pressure when the cell is over ranged from the gas side c Erratic behavior of the cell caused by traces of liquid in the ga...

Страница 22: ...dary winding is 105 ohms A high resistance of either winding indicates coil is open Replace transformer The occasion on which the transformer windings open at high pressure will exhibit the above symptoms temporarily above some value of pressure The meter pointer will be seen to dive to the pin as the pressure is increased When the meter becomes uncontrollable at high pressure the cable connector ...

Страница 23: ...to the transformer Continue to turn until the transformer is free 9 Remove the transformer and flush the cell again as in Operation 2 Do not disturb the core on the diaphragm stem 10 Insert the new transformer The wires may be somewhat longer than the original ones but it makes no difference it is not necessary to shorten them 11 Solder the wires to the terminals following the color code on the di...

Страница 24: ... of the conditions exist This condition may be encountered for example when making phase studies with gases Under this circumstance application of a small liquid overpressure against the diaphragm with the intent of dislodging it will be unsuccessful The area of the diaphragm exposed to the pressurized liquid is so small that only a small dislodging force actually exist If the pressure is increase...

Страница 25: ...m see Operation 3 Try to prevent oxides and excess flux from dropping into the cavity If necessary flush the cavity when the soldering is complete Replace the detent 10 Make the primary and secondary resistance test 11 Plug the box into the mains and allow the circuit to warm up a few minutes a Set the GAIN to maximum and set the SHUNT switch ON b Set the ZERO control to midpoint 500 counts c Rota...

Страница 26: ...RUSKA 2413 2417 2416 Users Manual 6 6 ...

Страница 27: ...eference symbol RUSKA stock number corresponding to the reference symbol will be found listed on Table 7 1 Serial number of the instrument and RUSKA stock numbers of parts required must accompany all orders for replacement When returning the instrument to the factory for servicing the indicator control circuit must always accompany the transducer ...

Страница 28: ...RUSKA 2413 2417 2416 Users Manual 7 2 gmo01 bmp Figure 7 1 RUSKA 2413 711 Differential Pressure Null Indicator Side View ...

Страница 29: ...Parts List RUSKA 2413 Differential Pressure Null Indicator Parts List 7 7 3 gmo02 bmp Figure 7 2 RUSKA 2413 711 Differential Pressure Null Indicator Top View ...

Страница 30: ...ature 1 86 396 10 Washer 1 2413 1 14 11 Wave Washer 1 2413 1 11 12 Washer 1 2413 1 13 13 Diaphragm Assembly 1 2413 012 14 Tube Plug 2 2118 1 1 15 O Ring 1 54 900 035 16 Adjustment Pinion 1 2413 1 5 17 Middle Body 1 2413 1 6 18 Dowel Pin 2 59 119 19 Transformer Block 1 2413 1 1 20 Lower Body 1 2413 1 7 21 Socket Cap Screw 12 70 230 3 8 x 1 1 2 22 Round Head Screw 2 70 120 05 06 4 x 1 2 23 Lead Thru...

Страница 31: ...ial Pressure Cell 40 000 PSI Parts List When ordering parts refer to cross sectional drawings 7 1 and 7 2 to determine reference symbol RUSKA stock number corresponding to the reference symbol will be found listed on Table 7 2 Serial number of the instrument and stock numbers of parts required must accompany all orders for replacement Table 7 2 RUSKA 2417 Differential Pressure Cell Parts List Item...

Страница 32: ...8 1 1 20 2 Adapter 1 211 21 2 Plug 25 047 22 2 Sleeve 25 046 23 2 Wave Washer 2413 1 11 24 1 Washer 2413 1 13 25 1 Body 2417 1 21 26 1 Pin 59 137 27 6 Screw 2417 1 26 28 6 Allen Nut 53 950 29 2 Screw 70 120 501 30 2 Screw 70 152 4 31 3 Screw 70 179 2100 32 1 O ring 54 700 140 33 2 O ring 54 900 33 ...

Страница 33: ...power supply which is in turn fully isolated from line voltages through a dual primary input isolation transformer The input line voltage 120 Vac or 230 Vac at 50 Hz or 60 Hz is selectable by means of a small circuit board located internal to the power cord receptacle Removal of the power cord allows access to the fuse and circuit board compartment The front panel controls include a power switch a...

Страница 34: ...RUSKA 2413 2417 2416 Users Manual 8 2 ...

Страница 35: ... is a function of the position of the core in the LVDT This information is half wave rectified by Q1 Q1 is operated by the squarewave generator Z1A The result at TP5 is a positive or negative half wave sinusoid whose amplitude is a function of core displacement from the null position and whose polarity is a function of the direction of the core displacement The signal at TP5 is then integrated by ...

Страница 36: ...RUSKA 2413 2417 2416 Users Manual 9 2 ...

Страница 37: ...ll position The oil displaced by the screwdriver will create a pressure head The head must be considered The head pressure will become more important as the test procedure progresses to the stages of higher amplification 8 Set SHUNT to OFF This condition provides maximum amplification of null sensing 9 The final adjustment of the transducer transformer prepares the instrument for use The accuracy ...

Страница 38: ...nt and unless they remain constant throughout the measurement process will affect the stability of the null pressure adjustment The accuracy to which the adjustment must be made will depend upon 1 The skill of the operator in neutralizing or otherwise accounting for the abnormal pressure bias on the diaphragm as described in C above 2 The number of potentiometer dial units that span the change in ...

Страница 39: ...of the original zero is plotted against their corresponding internal pressures and a smooth curve is fitted to the set of points Unless otherwise stated on the report the curve represents values observed at the maximum gain of the indicating circuit Negative values for the abscissae imply that the observed readings of the dial are less than that of the original zero Curves are constructed for both...

Страница 40: ...e opposite end While the pressure is maintained the pointer is returned to the original end of the scale and the process continued until a substantial head has been established in the manometer The total pressure divided by the total number of units through which the pointer has passed is the sensitivity in pressure units per meter unit The sensitivity decreases as the working pressure increases A...

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