USER MANUAL PRESSURE SWITCHES AND
Contents
1. Switch 5 1 Procedure B1 Single instrument Example 2 mbar falling and 6 mbar rising 5 1 1 Setting the lower threshold 1 2 3 A Inhibit the dead band spring RE by fully loosening the knob ME Raise the pressure to the lower threshold 2 mbar and stabilise it Using set point adjustment screw VG relax range spring RG until switch es C changes state Retighten and stop at the exact point where switch es C is are interlocked on the way down 5 1 2 Setting the upper threshold 5 6 7 8 Keep the pressure stable at 2 mbar Fully extend spring RE Raise the pressure to the upper threshold 6 mbar and stabilise it Using dead band adjustment screw VE relax dead band spring RE until the exact point when switch es C is are triggered on the way up 5 1 3 Checking Adjusting the set points d 10 11 12 13 Slowly raise the pressure and then slowly lower it again Measure the lower and upper triggering thresholds Fine tune the settings using screws VG Low threshold control and VE High threshold control Disconnect the instrument from the bench Apply a seal to adjustment screws VG and VE using a Georgin seal kit torque 1 7 N m 10 Close the cover and tighten the two captive screws torque 1 2 N m AGI www georgin com User Manual P series 5 2 Procedure B2 Diaohragm actuated differential instrument For reasons related to production and metrology low and medium pressure di2. gt The wall mount must be installed using two 5 mm screws Class 8 8 The housing must be secured to its mount and immobilised with screw V 2 5 N m The cover must be closed using the two captive screws 1 2 Nm V mounting screw View along F Dimensions in mm 1 2 Diaphragm pressure switches except PA type These instruments are supplied without a wall mounting plate Use the following mounting methods D ML B Use the four spacers provided around the edge of the sensing element D MABV DMKBV Use the two M10 threads provided under the sensing element D MJBV D MPB Use the two M6 threads provided under the sensing element We also provide special mounting brackets for the purpose Ask Georgin for further information www georgin com 9 User Manual P series 2 Mounting Avoid mounting on a vibrating wall This may result in a premature electrical malfunction It is especially when approaching the changeover thresholds that our devices are particularly sensitive to A certain vibration frequencies If no other mounting is possible we recommend the use of elastic suspensions for any use on a vibrating wall especially in the case of a slow evolution of the pressure or temperature 2 1 Pressure switch mounting The instruments are equipped with a 1 2 GM or 1 4 GF to ISO 228 1 fitting as standard Other fittings on request NPT connection to ASA B2 1 Optional connection by soldered tab see fc a
3. Safety for Industrial Process USER MANUAL PRESSURE SWITCHES Sp AND TEMPERATURE SWITCHES p T P Series www georgin com User Manual P series AURE lt E ai i a lt gt aS a VII l 2 2 Introduction 3 Purpose 3 Operating principle 3 Pressure Equipment Directive PED 3 Qualified equipment in accordance with RCC E 4 General information concerning functions 4 Before installation 5 Storage 5 Before installation 5 DOs and DON Ts 6 General Recommendations 6 Special recommendations 7 Prohibited actions 8 Advice 8 Commissioning 9 Mounting the housing 9 Mounting 10 Adjustment 12 Selection guide 12 Equipment required 13 Pre adjustment operations for any type of adjustment 13 Type A adjustment fixed dead band instrument 14 4 1 PROCEDURE A1 SINGLE INSTRUMENT 14 4 2 PROCEDURE A2 DIAPHRAGM ACTUATED DIFFERENTIAL INSTRUMENT 15 4 3 PROCEDURE A3 BELLOWS ACTUATED DIFFERENTIAL INSTRUMENT 15 Type B adjustment adjustable dead band instrument 16 5 1 PROCEDURE B1 SINGLE INSTRUMENT 16 5 2 PROCEDURE B2 DIAPHRAGM ACTUATED DIFFERENTIAL INSTRUMENT 17 5 3 PROCEDURE B3 BELLOWS ACTUATED DIFFERENTIAL INSTRUMENT 17 Type C adjustment electrical operation instrument with two offset switches18 6 1 PROCEDURE C1 SINGLE INSTRUMENT 18 6 2 PROCEDURE C2 DIAPHRAGM ACTUATED DIFFERENTIAL INSTRUMENT 19 6 3 PROCEDURE C3 BELLOWS ACTUATED DIFFERENTIAL INSTRUMENT 19 Wiring 20 The electrical switch 20 Cab
4. with two simultaneous Single mE B1 contacts Adjustable B Diaphragm differential B2 Bellows differential B3 Single C1 with two offset contacts C Diaphragm differential C2 Bellows differential C3 Note Instruments equipped with two simultaneous contacts are adjusted in the same way as devices with a single electrical function It is impossible to guarantee that the contacts of bipolar devices will close absolutely simultaneously on the upper and lower points If that condition is required choose a unipolar regulator controlling a bipolar relay If the device is not factory calibrated simultaneity will be achieved on the drop in pressure or temperature The values of the upper and lower points are modified by operating adjustment screw VG Operating the dead band adjustment screw VE only varies the peak or the dead band The identification plates are engraved to show both metric and Imperial units 12 GUD www georgin com Clockwise Increases the set point and or dead band value Anticlockwise Lowers the set point and or dead band value Note for RTPE type the dead band adjustment screw VE is internal to the housing 2 Equipment required A1 class calibration standard For pressure switches a pressure gauge For temperature switches a thermometer A pressure or temperature generator For pressure switches an air generator for pressures from 1 to 80 bar Hydraulic for pressures from 8
5. 108 160 160C Adjustable dead band models 34 34V 106 162 162C 5 1 4 Electrical operation with two offset contacts Combination of two single functions adjusted to act with a gap between The spring RE is used to adjust the gap between the interlocking of the switches Models 46 54 54V 50 56 116 118 172 172C 170 170C 5 1 5 Electrical operation with manual reset Once triggered the switch returns to its initial position only if you press the button located on the side of the housing and only if the pressure or temperature has dropped type 18 max cut off device or climbed type 20 min cut off device beyond the set point 4 GEUREN www georgin com User Manual P series For temperature switches the minimum dead bands given in our manuals are recorded under ideal test conditions The sensing element experiences the temperature variations of the installation without A delay and in its bulk In operation these dead bands can be different in view of the exchange conditions rate of temperature change specific heat radiation inertia of the measuring instrument compared to inertia of temperature switch presence of a sleeve or immersion sleeve etc 5 2 Pneumatic functions The instruments can be equipped with a Normally Open NO or Normally Closed NC pneumatic function using a poppet or spool valve The supply fittings are M5 1 4 or 1 8 gas threaded according to the type of function or the mod
6. actuated differential instrument Example Lower threshold set to 1 bar falling with 10 bar static pressure 4 3 1 Setting the lower threshold 1 Go up to the desired static pressure in both chambers 10 bar and stabilise 2 Isolate both chambers 3 Create a pressure differential in favour of the HP chamber equal to the desired threshold value 1 bar HP 10 bar LP 9 bar 4 Using set point adjustment screw VG relax range spring RG until the exact point when switch es C is are triggered on the way up 5 Retighten and stop at the exact point where switch es C is are interlocked on the way down 4 3 2 Checking Adjusting the set points 6 Repeat operations 1 to 3 and then slowly pressurise and depressurise the HP chamber to measure the changeover value of the switch es on the way down Fine tune the setting using adjustment screw VG Lower and Upper threshold control Disconnect the instrument from the bench Apply a seal to adjustment screw VG using a Georgin seal kit torque 1 7 N m 10 Close the cover and tighten the two captive screws torque 1 2 N m a eS O www georgin com 15 User Manual P series 5 Type B adjustment adjustable dead band instrument VG Range adjustment screw RG Range spring IG Range index IE Dead band and offset index RE Dead band adjustment and offset spring VE Dead band adjustment and offset screw ES Sensing element LP Flexible arm LE Dead band arm C
7. point when switch es C is are triggered on the way up 5 3 3 Checking Adjusting the set points 12 Repeat operations 2 and 3 and then slowly pressurise and depressurise the HP chamber to measure the changeover values of the switch es on the way up and the way down 13 Fine tune the settings using the threshold adjustment screw VG Lower threshold and VE Upper threshold 14 Disconnect the instrument from the bench 15 Apply a seal to adjustment screws VG and VE using a Georgin seal kit torque 1 7 N m 10 16 Close the cover and tighten the two captive screws torque 1 2 N m www georgin com 17 User Manual P series 6 Type C adjustment electrical operation instrument with two offset switches lt YD sesia a max ofset 3 et E E Changeover points for 2nd D e cc threshold at min offset a be Changeover points for semen ek EN 1st threshold VG Range adjustment screw RG Range spring IG Range index IE Dead band and offset index RE Dead band adjustment and offset spring VE Dead band adjustment and offset screw ES Sensing element LP Flexible arm LE Dead band arm C Switch 6 1 Procedure C1 Single instrument Example Set the first threshold to 5 bar downwards and the second threshold to 6 bar upwards 6 1 1 Set the first LP switch threshold 1 Fully loosen screw VE 2 Raise the pressure to the first threshold 5 bar and stabilise it 3 Using set point adjustment screw VG r
8. 0 to 1000 bar For temperature switches a thermostatic bath The coolant fluid must be appropriate for the temperatures concerned e g water glycol from 20 to 0 C An electric low level system 1 ohmmeter 1 buzzer indicator light powered at 24 V 3 Pre adjustment operations for any type of adjustment Loosen the two captive screws holding the cover and then remove it Perform a visual inspection of the instrument Install the instruments For pressure switches connect the instrument to a pressure bench For temperature switches immerse the bulb s in the bath The range RG and dead band RE springs if the instrument has any must be fully extended Connect the terminal s to the electrical system For pressure switches the pressure change when approaching the thresholds will be approximately Forathreshold lt 2 5 mbar lt 0 025 mbar min Forathreshold lt 10 mbar lt 2 5 mbar min Forathreshold lt 100 mbar lt 3 5 mbar min Fora threshold gt 100 mbar lt 5 EM min For temperature switches the temperature change will be approximately 0 5 C min Note The following procedures describe the steps to be applied in order to calibrate pressure switches For temperature switches the procedure is the same as for single or differential bellows actuated pressure switches Adjust in C Vary the temperature www georgin com User Manual P series 13 User Manual P serie
9. 162 162C 172 172C 5A 240V 0 4A 250V 60 60C 160 160C 170 170C 7A 240V 0 25A 250V 6V 4D 44D 46D 6D 34D 54D 1mA 100mA 4V 30V 8D 10D 30D 38D 50D 16D 36D 56D 10mA 100mA 6V 24V 18D 20D 10mA 100mA 6V 24V IMPORTANT Intrinsic Safety certified instruments Ex ia are equipped with gold plated contacts These instruments must be interfaced via an Intrinsic Safety relay Georgin recommends the RDN model see fc rdn fren on www georgin com The explosion proof switches with cable output must be imperatively connected to an approved terminal block and a junction box 4 2 Breaking capacity limits Gold plated contacts Minimum threshold Maximum threshold 18D and 20D 10 mA 6 Vdc 100 mA 24 Vdc Never operate or test the q J F instrument above the 6D 34D 54D 4D 44D and 46D 1 mA 4Vdc 100 mA 30 Vdc madimunithreshold Other gold plated contacts 10 mA 6 Vdc 100 mA 24 Vdc Standard contacts Never use below 100 mA 24 VAC 5 The pneumatic switch Labelling of the cell connections NO operation NC operation A NOn sda U T A Power supply p x E Exhaust U U ete ee eee U Use For certain models exhaust is via open cable gland or screw terminal mandatory for ATEX models The control pressure applied to the unit affects the dead band at a given set point the lower the supply pressure the smaller the dead band and vice versa www georgin com 21 User Manual P series VII Mai
10. 3500 fren To make the connections use the appropriate spanners for the fittings and never use the housing to tighten Recommended tightening torque for the pressure fitting 50 N m for the 1 2 GM Check that the pressure inlet tubes are not applying any mechanical load to the fitting and the housing Observe the environmental and fluid related conditions corresponding to the characteristics of the instruments Provide tubing or a capillary to avoid any overheating through conduction Never exceed the maximum pressure of the instrument indicated on the label on the side of the housing 2 1 1 Monitoring liquid pressure The pressure switch must be installed under the pressure fittings The pipework must be installed in a way that prevents any accumulation of gas in the pressure switch The installation of a gas collection tank is recommended The pipes connecting the process to the pressure switch must have a descending slope of at least 1 10 to prevent gas accumulation 2 1 2 Monitoring gas pressure The pressure switch must be installed above the pipes to prevent condensation in the connection pipes and the pressure switch measurement chambers If the gas temperature is high a cooler or a siphon may be used The pipes connecting the process to the pressure switch must have a rising slope of at least 1 10 to prevent the accumulation of liquid or condensates 2 1 3 Monitoring the vapour pressure The pressure switch may be ins
11. Manual P series 2 4 Bourdon tube instruments PL PLB sensors When the instrument is mounted on rigid fittings ensure that the mount does not apply any residual loads to the process connector 2 5 Temperature switches Any difference in level between the housing and the probe must be taken into account Where necessary to inhibit the effect of the height of the liquid column the calibration values may need to be corrected for more information ask us 3 Prohibited actions 3 1 Integrity of the housing To avoid compromising the mechanical properties of the enclosure and invalidating its qualification level no drilling or machining must be performed on these measuring instruments Gas throttling surfaces seal planes are kept clean lightly lubricated e g silicone grease and free of dents or scratches Add on seals and paint are strictly prohibited 4 Advice 4 1 Temperature switches 4 1 1 Devices equipped with an immersion sleeve For bulbs implanted in immersion sleeves except perforated immersion sleeves for gaseous fluid applications a thermal bridge must be created between the bulb and the immersion sleeve using a filler liquid oil or a heat conducting paste Caution Ensure that the quantity of liquid or paste is not excessive to avoid compressing the bulb but is sufficient to cover it completely 4 1 2 Orientation of the probe ESSENTIAL Thermostatic probes must be installed facing down wit
12. b and the length of the capillary can be specified in the order a Monitoring fluids Completely immerse the probe Use an appropriate type GBX or GCX immersion sleeve immersed perpendicular to the flow or use a PC X B capillary cable gland according to the existing process fitting type b Monitoring surfaces Carefully clean the contact surface and the probe Secure the probe using a metal preferably cuprous collar covering the length of the probe Add thermal insulation on top Take care to observe the probe orientation see Chapter Ill 4 1 2 Thermal insulation Copper allov flanae 2 2 4 Accessories Capillary cable gland kit If the capillary outlet must be sealed use our special PC X type cable gland e Slide nut E onto the capillary e Secure sleeve M on the thread 1 2 GF NPTF etc e Insert two washers R in sleeve M inverting the notches e Insert gasket G consisting of five or six according to model Teflon washers e Insert the other two washers like the first two e Tighten nut E onto sleeve M For further information ask us www georgin com 11 User Manual P series V Adjustment The adjustment procedures vary from one instrument to another An instrument is adjusted according to several criteria 1 Selection guide Function Leco mecla Type of sensing element HERING band adjustment yP g Number Single A1 Fixed A Diaphragm differential A2 Single Bellows differential A3
13. balanced by the spring RG This is how the set point is adjusted As the set point is approached the change in forces disturbs the balance and acts on the contact A second spring RE acting on the end of the flexible arm LP increases the deviation of the switch es The force produced by the dead band spring is adjustable and is used to offset the two contacts in the case of differential functions NOTE The pressure switch and temperature switch scales indicated in our catalogue are values for a set point to lower the pressure or temperature 3 Pressure Equipment Directive PED Series P pressure and temperature switches satisfy the requirements set forth in Appendix of PED 2014 68 EU They are classified in Category IV as a safety accessory and can be incorporated in a safety loop Refer to our declaration of compliance for the models concerned and conditions of use www georgin com 3 User Manual P series 4 Qualified equipment in accordance with RCC E The pressure switches and temperature switches of the P series meet the design and construction rules for electrical equipment of nuclear plants Refer to the equipment identification sheet according to the last index NTP N 100 consult us for a definition installation rules and recommendations for maintenance of the equipment in accordance with the associated quality and general requirements 5 General information concerning functions The instruments may be equipp
14. e attached datasheet Apply graphite grease on the cable entry threading before tightening the cable gland Ensure that the cable gland has been tightened sufficiently and add drip protection to the cable in order to preserve the instrument s IP level 3 Internal terminal blocks The terminal blocks are designed for the following maximum wire size 2 5 mm for standard models and 1 5 mm for ATEX models Contact No 2 Contact No 1 Standard contacts 4 6 8 10 16 20 D T red 34 54 38 58 D T red white 18 D Oeo lo oe d oe red Nitrogen sealed contacts 96 98 red white 106 116 108 118 red white green red white green Explosion proof contacts 60 D 160 170 D 62 D 162 172 D Cable outlet explosion proof contacts 60C 160C 170C 62C 162C 172C For specific electrical connections refer to the associated technical drawings Housing closure except explosion proof housings To preserve the instrument s ingress protection IP index the cover must be closed and tightened to the following torque 1 2 N m 20 GEORGIN www georgin com User Manual P series 4 Breaking capacity resistive circuits 4 1 Breaking capacities Contact No AC DC 4 44 10A 240V 0 5A 110V 6 8 18 20 34 38 54 5A 240V 0 5A 130V 10 16 30 36 50 56 2A 240V 1A 130V 96 106 116 98 108 118 2 5A 240V 1A 130V 92 102 112 4A 115V 0 3A 110V 62 62C
15. e housing of these instruments must NEVER be used as a mount 1 9 Installation see Section IV 2 The instruments are mounted according to type Refer to the specific dimensional drawings For pressure switches if the pressure connection uses a rigid tube ensure that this tube is aligned with the axis of the fitting so that the housing and the measuring element in particular are not subject to any mechanical loads that could deform them or shift the threshold 2 Special recommendations 2 1 ATEX devices For ATEX devices it is ESSENTIAL to refer to the ATEX Instruction Manual supplied with the equipment and available on www georgin com 2 2 Low and medium pressure instruments Diaphragm actuated instruments except PA type must be installed with the diaphragm horizontal and secured to a special mount Ask us for further information 2 3 Differential pressure switches To ensure that the contact s will change state the pressure in the HP chamber must be greater than that in the LP chamber This difference must be greater than the sum of differential pressure AP microswitch dead band HP LP gt AP e Type Max Max P dead static o bar Sa a YB H _ B HWH an Grs Ga 18 Example For a DPB QX11 in function 96 the pressure in the HP chamber must be greater than the pressure in the LP chamber by at least P HP P BP gt 0 5 1 2 bar P HP P BP gt 1 7 bar www georgin com 7 User
16. ed with electrical or pneumatic functions 5 1 Electrical functions Note The dead band values given in our catalogues are indicative values recorded in a laboratory measured between the maximum and minimum settings If the instrument is used outside its operating limits the set point s and dead band values may be affected The electrical operation of the instrument differs according to the type of microswitch used Many different versions are on offer gilt tropicalised nitrogen sealed etc 5 1 1 Single fixed dead band electrical operation Microswitch only Each type of microswitch has its own characteristics as indicated in the catalogue Models 4 4D 10 10D 16 16D 8 98 60 60C 5 1 2 Single adjustable dead band electrical operation Microswitch combined with a spring RE to increase the microswitch dead band value in a given range refer to the dead band table in the catalogue The trigger value of the upper threshold can be offset using the RE This action has no effect on the lower threshold Models 6 6V 96 62 62C 5 1 3 Electrical operation with two simultaneous contacts Combination of two single functions set to act at the same time either upwards or downwards The dead band of a simultaneous function is greater than that of a single function When rolling out from the factory the simultaneity is wedged to the decrease of pressure temperature Fixed dead band models 44 30 36 38
17. el According to the type of cell the control pressure will be As standard 1 5 to 8 bar poppet design lt gt with a residual leak On request 0 to 10 bar spool design lt gt without leak The control fluid must be compatible with the ISO VG 10 standard air nitrogen etc Maximum allowable filtration 5 um The standard materials for the cell body are polyamide brass and or aluminium The seals are made of NBR other types on request ll Before installation 1 Storage The pressure switch or temperature switch must be stored in a sheltered location in its original packaging The storage temperature must be between 40 and 70 C for bellows instruments 20 and 70 C for diaphragm pressure switches 40 and 55 C for temperature switches from the C G and M ranges They must not be stacked to reach a load greater than 10 kg 2 Before installation Allow the instrument to return to ambient operating temperature before installing it Whilst removing the packaging check the equipment and all accessories The housing must be examined to check the following points Check that the paint has not been damaged Check that there are no signs of deformation or impact on the housing For instruments equipped with an immobilising bolt for transport located in the instrument s process fitting remove this item A For ML DML instruments Loosen the locknut and the immobilizing bolt inserted in the fitting 2 Co
18. elax range spring RG until switch es C changes state 4 Retighten and stop at the exact point where the first threshold is triggered LP contact 6 1 2 Set the second HP switch threshold 5 Raise the pressure to the second threshold 6 bar and stabilise it 6 Fully extend spring RE 7 Using dead band adjustment screw VE relax dead band spring RE until the exact point when the second threshold HP switch is triggered on the way up 6 1 3 Checking adjusting thresholds 8 Slowly raise the pressure and then slowly lower it again Measure the desired thresholds 9 Fine tune the settings using screws VG 1st threshold LP control and VE 2nd threshold HP control 10 Disconnect the instrument from the bench 11 Apply a seal to adjustment screws VG and VE using a Georgin seal kit torque 1 7 N m 10 12 Close the cover and tighten the two captive screws torque 1 2 N m 18 EDA www georgin com User Manual P series 6 2 Procedure C2 Diaphragm actuated differential instrument For reasons related to production and metrology low and medium pressure differential instruments are adjusted relative to each other with the LP chamber vented to atmosphere The procedure is identical to the procedure described in the previous point C 1 Single instrument The HP chamber is connected to the pressure bench and the LP remains at atmospheric pressure 6 3 Procedure C3 Bellows actuated differential instrument Example Set
19. fferential instruments are adjusted relative to each other with the LP chamber vented to atmosphere The procedure is identical to the procedure described in the previous point B 1 Single instrument The HP chamber is connected to the pressure bench and the LP remains at atmospheric pressure 5 3 Procedure B3 Bellows actuated differential instrument Example Set the low threshold to 1 bar downwards and the high threshold to 3 bar upwards and static pressure 10 bar 5 3 1 Setting the lower threshold 1 Inhibit the dead band spring RE by fully loosening the knob ME 2 Go up to the desired static pressure in both chambers 10 bar and stabilise 3 Isolate both chambers 4 Create a pressure differential in favour of the HP chamber equal to the desired low threshold value 1 bar e g HP 1 bar LP 9 bar 5 Using set point adjustment screw VG relax range spring RG until the exact point when switch es C is are triggered on the way up 6 Retighten and stop at the exact point where switch es C is are interlocked on the way down 5 3 2 Setting the upper threshold 7 Return to the desired static pressure in both chambers 10 bar and stabilise 8 Isolate both chambers 9 Fully extend spring RE 10 Create a pressure differential in favour of the HP chamber equal to the desired high threshold value 3 bar HP 10 bar LP 7 bar 11 Using dead band adjustment screw VE relax dead band spring RE until the exact
20. formed on the equipment other than adjusting the instrument releases GEORGIN from all liability in the event of failure In the event you suspect a failure or permanent fault return the equipment to our offices or our representatives who are the only maintenance providers certified to perform expert assessments or repairs Any equipment returned MUSTbe accompanied by an After Sale Service return form This can be obtained from www georgin com look under download After Sale Service and must be duly completed and signed www georgin com 23 Subject to modifications due to technical advances fu p en 11 01 2019 Safety for Industrial Process Designed developed and manufactured in France GEORGIN Regulators France 14 16 rue Pierre S mard BP 107 92323 CHATILLON Cedex France Tel 33 0 1 46 12 60 00 Fax 33 0 1 47 35 93 98 Email regulateurs georgin com Belgium Temselaan 5 1 floor 1853 STROMBEEK BEVER Tel 32 0 2 735 54 75 Fax 32 0 2 735 16 79 Email info georgin be www georgin com
21. fter six years of standard operation perform another inspection to ensure that the instrument is ageing well 1 Check that the paint has not been damaged and check that there are no signs of deformation or impact on the housing 2 Open the cover and check that the cover seal is not damaged cracks etc 3 Check the calibration and adjust if necessary applying the procedures given in this manual 22 ALIN www georgin com User Manual P series Year12 After 12 years in standard operation Georgin recommends sending the instrument to our After Sale Service department for diagnosis This may lead to some components being replaced or the instrument being scrapped After 12 years of operation an annual inspection must be performed Note Beyond 20 years of operation no further repairs will be carried out The instrument will always be scrapped in the event of failure In view of the many and varied possible uses on industrial sites the maintenance frequency must be increased in case of heavy duty operation or harsh conditions For example High rate gt 4 cycles minute Corrosive or crystalline fluid or environments A Instruments in safety roles must be inspected annually 2 Precautions to take during maintenance The instrument must be disassembled WHEN DISCONNECTED FROM POWER using an appropriate spanner for the fitting GEORGIN guarantees the qualification of the equipment that leaves the factory Any operation per
22. h the _ capillary outlet at the top T The measurement probe must not be placed in a horizontal position i D Our temperature switches consist of two main components probe and housing which might or might not be connected by a capillary The position of the probe can affect the operation of the temperature switch This type of probe is intended for vertical use and is placed lower than the housing Prohibited position Any deviation from these conditions can affect the response time and operation of the device Recommended position Our temperature switches are built with a filling that allows the probe to be tilted 45 without affecting their operation Beyond that their operation depends on the value of the measured temperature compared to the ambient temperature 8 GUD www georgin com User Manual P series Recommended area 45 either side of the vertical axis bulb down capillary output up temperature value Ts and the ambient temperature Ta Ta gt Ts operation is not affected Ia Ta lt Ts operation might be affected Ta Ts operation is affected Prohibited area Beyond 75 the operation of the sensor can be significantly affected This is difficult to predict and depends on several physical parameters Technical solutions are possible on request ask us IV Commissioning 1 Mounting the housing 1 1 Bellows Bourdon tube and PA diaphragm pressure switches and temperature switches
23. hes on a steam circuit to limit the temperature at the sensor 1 6 Condensation Protect from excessive sunlight to limit the effects of night time condensation The installation location must be chosen very carefully in seaside locations or damp environments 1 7 Vibrations Georgin recommend avoid mounting the instrument directly on vibrating equipment Otherwise an effective anti vibration system fully suitable for installation assembly type process connection electrical connection and its environment must be chosen Flexible piping connections and silent blocks may sometimes be necessary The effectiveness of this mounting must be checked after installation 6 GATED www georgin com User Manual P series 1 8 Mounting the housing see Chapter IV 1 Georgin recommends mounting the housing in accordance with the following rules a For bellows or Bourdon tube pressure switches and temperature switches The orientation of the housing has little effect on the operation of the instrument but an upright vertical position is nevertheless recommended with adjustment screw facing upwards This prevents premature wear and preserves the measurement characteristics b For diaphragm pressure switches Diaphragm instruments except PA type MUST be mounted vertically with adjustment screw facing upwards with the diaphragm horizontal on an appropriate mount Because of the weight and or the shape of the sensing element th
24. ld adjustment screw RG 1st threshold and RE 2nd threshold 14 Disconnect the instrument from the bench 15 Apply a seal to adjustment screws VG and VE using a Georgin seal kit torque 1 7 N m 10 16 Close the cover and tighten the two captive screws torque 1 2 N m www georgin com 19 User Manual P series VI Wiring 1 The electrical switch Resting state of the switch es Position above the threshold At rest contact is established between C NC According to the type of action opening or NC Position below the threshold closing of the electrical circuit make the electrical connection on the terminal block between C NC or C NO 2 Cable inlets The instruments except explosion proof housings are supplied with one or two M20 cable glands For 7 5 to 13 mm cable standard instrument For 8 to 13 mm cable S l and Ex de instrument Other cable gland models are available on request The instrument can also be supplied without cable inlets In that case the instrument is supplied with an M20 thread as standard The cable gland must be mounted according to the attached datasheet Explosion proof housings the housing is supplied as standard with a type 3 4 NPT cable inlet Cable glands are available as an option The choice of cable gland directly affects the certification and could lead to the equipment being declassified Refer to the ATEX instruction sheet The cable gland must be mounted according to th
25. le inlets 20 Internal terminal blocks 20 Breaking capacity resistive circuits 21 The pneumatic switch 21 Maintenance 22 Inspection frequency 22 Precautions to take during maintenance 23 GAD www georgin com User Manual P series I Introduction You have just acquired a GEORGIN instrument that has undergone extensive testing and several quality checks to ensure your complete satisfaction Appropriate specification according to your process and compliance with the instructions in this manual will ensure an optimum working life for your instrument l Purpose P Series instruments are intended for process monitoring This manual gives the assembly and configuration instructions to be applied for optimum operation of your instrument You must read and obey these instructions when installing your instrument Never tamper with components of the instrument that are immobilised with red varnish Any damage caused by a failure to obey these instructions will invalidate the manufacturer s guarantee 2 Operating principle VG Range adjustment screw RG Range spring IG Range index IE Dead band and offset index RE Dead band adjustment and offset spring VE Dead band adjustment and offset screw ES Sensing element LP Flexible arm LE Dead band arm C Switch The pressure or temperature is applied to the sensing element ES whose position then changes acting on the flexible arm LP The force produced in this way is
26. nnect the instrument to a pressure bench on the HP side and apply a pressure of 150 mbar Return to atmospheric pressure and disconnect the instrument from the bench 3 Rest the instrument for 24 hours before calibrating Before installation check again that the materials in contact are compatible with the process to be monitored If necessary protect the instrument with a safety device that is appropriate to the application pressure limiter shock absorber thermowell www georgin com 5 User Manual P series Ill DOs and DON Ts 1 General Recommendations 1 1 Operating temperature limits oressure sensing element Bronze bellows 20 to 60 C Stainless steel bellows 20 to 150 C Stainless steel tube 20 to 150 C NBR diaphragm 20 to 100 C EP diaphragm 40 to 120 C FKM diaphragm O to 150 C For temperature switches refer to the range tables 1 2 Ambient operating temperature limits housing 20 to 70 C except temperature switches from the C G and M ranges max 55 C others on request 1 3 Radiant heat Avoid installing the instrument near radiant heat sources Observe the ambient operating temperature limit 1 4 Pulsations A suitable shock mount or flexible piping connection must be provided to protect bellows instruments in case of vibrations or process instability possible use of PA type pressure switches 1 5 Steam A siphon must be placed upstream from the pressure switc
27. ntenance 1 Inspection frequency Inspection frequency depends on several criteria The mechanical and or electrical working life of the microswitch The mechanical working life of the sensing element Frequency and conditions of operation of the instrument Georgin s standard recommendation is to proceed as indicated 1 Visual inspection of the instrument 1 Visual inspection See Chapter Il Before installation 2 Check cover seal 2 Calibration 3 Checking adjusting the calibration i Visual inspection 1 Replacement to 2 Check cover seal be considered after 3 Checking adjusting the calibration complete inspection YearO 1 Check that the paint has not been damaged and check that there are no signs of deformation or impact on the housing 2 Calibration If the instrument is supplied adjusted Check that the calibration is compliant and readjust if necessary If the instrument is supplied unadjusted Calibrate it according to the procedures given in this manual Year1 After one year of standard operation the mechanism can be considered to be run in The following points must therefore be checked 1 Check that the paint has not been damaged and check that there are no signs of deformation or impact on the housing 2 Open the cover and check that the cover seal is not damaged cracks etc 3 Check the calibration and adjust if necessary applying the procedures given in this manual Year 6 A
28. s 4 Type A adjustment fixed dead band instrument P T HIGH POINT tripping LOW POINT interlocking VG Range adjustment screw RG Range spring IG Range index ES Sensing element LP Flexible arm C Switch 4 1 Procedure A1 Single instrument Example 6 bar rising setting 4 1 1 Adjusting the set point 1 Raise the pressure to the threshold 6 bar and stabilise it 2 Using set point adjustment screw VG relax range spring RG until switch es C changes state 4 1 2 Checking Adjusting the set point Slowly raise the pressure and then slowly lower it again Measure the lower and upper triggering thresholds Fine tune the settings using adjustment screw VG Lower and Upper threshold control Disconnect the instrument from the bench Apply a seal to adjustment screw VG using a Georgin seal kit torque 1 7 N m 10 Close the cover and tighten the two captive screws torque 1 2 N m Soe eS 14 www georgin com User Manual P series 4 2 Procedure A2 Diaohragm actuated differential instrument For reasons related to production and metrology low and medium pressure differential instruments are adjusted relative to each other with the LP chamber vented to atmosphere The procedure is identical to the procedure described in the previous point A 1 Single instrument The HP chamber is connected to the pressure bench and the LP remains at atmospheric pressure 4 3 Procedure A3 Bellows
29. talled laterally or under the pressure fittings A condensate vessel must be installed between the pressure switch and the pressure fitting The pipe or pigtail siphon see fc a3000 fren connecting the condensate vessel to the pressure switch must be filled with water beforehand A bleeder valve must be installed Lateral installation Installation under the pressure fitting 10 ALI www georgin com User Manual P series 2 2 Temperature switch mounting Observe the environmental and fluid related conditions corresponding to the characteristics of the instruments Never exceed the maximum temperature of the instrument indicated on the label on the side of the housing A capillary introduced into the liquid can be of any length 2 2 1 Direct probe device Type B Secure the instrument via its fitting on G 3 8 thread as standard other on request Completely immerse the probe 2 2 2 Ambient monitoring instrument Type BA The instrument must be installed in a well ventilated location away from heat sources or refrigerant devices It must not be subjected to sudden temperature changes For monitoring in inhabited buildings install the temperature switch 1 50 m above the floor and far from external walls 2 2 3 Remote probe device Type C Do not constrain the capillary It must remain flexible to transmit the signal Roll the capillary with a diameter of at least 80 mm NOTE In certain cases the size of the bul
30. the first threshold to 1 bar downwards and the second threshold to 5 bar upwards with static pressure 10 bar 6 3 1 Set the first LP switch threshold 1 Inhibit the dead band spring RE by fully loosening the screw VE 2 Go up to the desired static pressure in both chambers 10 bar and stabilise 3 Isolate both chambers 4 Create a pressure differential in favour of the HP chamber corresponding to lowering the first required threshold 1 bar HP 10 bar LP 9 bar 5 Using set point adjustment screw VG relax range spring RG until the exact points when the two switches are triggered on the way up 6 Retighten until the exact point where the first threshold is triggered on the way down LP switches 6 3 2 Set the second HP switch threshold 7 Return to the desired static pressure in both chambers 10 bar and stabilise 8 Isolate both chambers 9 Fully extend spring RE 10 Create a pressure differential in favour of the HP chamber equal to the second desired high threshold value 5 bar HP 10 bar LP 5 bar 11 Using dead band adjustment screw VE relax dead band spring RE until the exact point when the second threshold is triggered on the way up HP switch 6 3 3 Checking adjusting thresholds 12 Repeat operations 2 and 3 and then slowly pressurise and depressurise the HP chamber to measure the changeover values of the switches on the way up and the way down 13 Fine tune the settings using the thresho
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