Operating Instructions

Transcription

1 Operating life time Normal expeted servie life (expressed in the number of yles over the full adjustment range) is appr. 1 million for the pressure swith. This may be extended to 2.5 million yles max. if only a part of the adjustment range is used (about 20%). Operating Instrutions Single/Dual Metal Diaphragm Pressure Swithes Type D1S/D2S and D1X/D2X Swith sensor life may also be effeted negatively by: Media not ompatible with the wetted materials. Too high swith yling speed or more than 20 yles per minute. System yling pressure exeeding the top of the adjustable range. The proof pressure must never be exeeded, otherwise the swith may be damaged. Careful seletion of the pressur e range an have a positive effet on the servie life of the swith. 1 Intended Appliations Safety Instrutions... 2 Standards... 4 Warranty/Guaranty... 5 Installation/Commissioning Maintenane/Cleaning Tehnial Data... 9 Barksdale GmbH Dorn-Assenheimer Straße 27 D-6120 Reihelsheim Phone: +49 (605) Fax: +49 (605) and info@barksdale.de Internet: Art. no.: Index N, Speifiations are subjet to hanges without notie! 12 1

2 1 Intended Appliations The pressure swithes are speifially applied for monitoring and ontrolling of operations using maximum and minimum pressures. A miro swith triggers an eletrial signal when minimum or maximum pressure are reahed. DANGER The swith may only be used in the speified fields of appliation (see type label). The temperature has to be within the speified ranges, the pressure values and the eletrial rating must not exeed the values speified. Observe also the appliable national safety instrutions for assembly, ommissioning and operation of the swith. The swith is not designed to be used as the only safety relevant element in pressurized systems aording to DGR 97/2/EC. Without speial provisions/ations, pressure swithes must not be used for ombustable gas or pure hydrogen appliations. 2 Safety Instrutions The safety instrutions are intended to protet the user from dangerous situations and/or material damage. In the operating instrutions the seriousness of the potential risk is designated by the following signal words: DANGER Refers to imminent danger to men. Nonobservane may result in fatal injuries. Refers to important information essential to the user. Standards Disposal The equipment must be disposed of orretly in aordane with the loal regulations for eletri/eletroni equipment. The equipment must not be disposed of with the household garbage! The standards applied during development, manufature and onfiguration are listed in the CE onformity and manufaturer's delaration. 4 Warranty/Guaranty Warranty Our sope of delivery and servies is governed by the legal warranties and warranty periods. Terms of guaranty We guaranty for funtion and material of the single- / dual- pressure swith under normal operating and maintenane onditions in aordane with the statutory provisions. Loss of guaranty The agreed guaranty period will expire in ase of: hanges or modifiations to the swith/housing/fitting inorret use, inorret installation or inorret handling or operation ontrary to the provisions of these operating instrutions. No liability is assumed for any damage resulting therefrom, or any onsequential damage. Refers to a reognizable danger. Nonobservane may result in fatal injuries, and destroy the equipment or plant parts. CAUTION Refers to a danger. Nonobservane may result in light injuries and material damage to the equipment and/or to the plant. 2

3 5 Installation/Commissioning DANGER Only install or uninstall the swith when deenergized (eletrially and hydraulially/pneumatially). Pressure onnetion and eletrial onnetion must be arried out by trained or instruted personnel aording to state-of-the-art standards. The swith must only be installed in systems where the maximum pressure P max is not exeeded (see type label). CAUTION Contat Protetion The miro swithes used are normally suitable for both diret and alternating urrent operation. Indutive, apaitive and lamp loads may, however, onsiderably redue the life expetany of a miro swith and, under extreme irumstanes, even damage the ontats. Depending on the appliation spark suppression and urrent limiting is reommended (see sueeding figures). R1 C able R2 R R R Alternating pressure - vauum appliations are not authorized in swith types whih are suitable for both vauum and pressure appliations. Pressure peaks and pressure shoks exeeding the maximum operating pressure are inadmissible. The maximum operating pressure is the upper final value of the adjustable range or, if speified, the pressure indiated as maximum operating pressure. Exeeding the max. operating pressure affets the performane and the life span of the produt and may damage it. Pressure swithes must be mounted vibrationless. Chek the swith regularly for funtioning. If the swith does not work properly, stop operation immediately! All pressure swithes are tested for proper funtioning before they leave the fatory. The fatory proof pressures are stated on the type label. Fig. 1: Protetion in ase of apaitive loads R1: Protetion against starting urrent rushes R2,R: Protetion against high disharge urrents U = Diode Fig. : Protetion in ase of ontinuous urrent and indutive load by reovery diode Fig. 2: Lamp load provided with resistane in parallel or series onnetion to swith of ondensators U R Fig. 4: Protetion in ase of alternating urrent and indutive load by RC-link 4 5

4 Set point adjustment Fatory-Provided: pressure (temperature) swith point setting We onfirm for pressure (temperature) swithes that have been fatory set the setting will be detailed on the label name plate. Warranty is not appliable for any hanges that may our due to transportation or installation. For ritial appliations we reommend the setting is heked and re-set if eessary after installation and wirding of the pressure (temperature) swith. In pressure swithes, a displaement of the pressure sensing element ours with a hange in pressure. Following the displaement of the pressure sensing element operates a miroswith. Upon delivery of the produt, the set points are likely to be found in the middle of the adjustable range. On request, fix set points may be adjusted by our fatory. In this event, the point will be indiated on the type plate or any separate plate, i = inreasing, d = dereasing. The set point is adjusted by turning the adjustment srew. To reah the adjustment srew for pressure swithes with housing, remove the over (see Fig. 8). Preise adjustment of set point to atuate on inreasing pressure Lower system pressure to 0 bar. Inrease pressure slowly and hek if miro swith is atuated at desired swith pressure. If neessary, readjust by turning the adjustment srew Repeat preeding steps until miroswith operates at desired swith pressure. Preise adjustment of set point to atuate on dereasing pressure Inrease pressure up to a point learly above the desired swith pressure (at least, swith pressure plus max. hysteresis; not above max. operating pressure). Lower pressure slowly and hek if miro swith is atuated at desired swith pressure. If neessary, readjust by turning the adjustment srew Repeat preeding steps until miroswith operates at desired swith pressure. Following the adjustment of all set points, eah set point must be heked and, if neessary, be readjusted. The adjustment of several set points ours for eah set point as speified above. Wiring Code for all Types (Contat status at atm. pressure) Allow pressure swith to reah the desired swith pressure. Turn adjustment srew lokwise or ounterlokwise to atuate the miro swith. NC NO Power iruit C = purple Power iruit C = brown In ase of overpressure: + In ase of vauum: + Counterlokwise rotation: Clokwise rotation: Counterlokwise rotation: Clokwise rotation: set point inreasing set point dereasing set point dereasing set point inreasing NC NO at vauum NC/NO vie versa Fig. 5: Wiring Code NC = blue NO = red NC = orange NO = blak Please onsult the wiring diagram for the ontat status at atmospheri pressure (see Fig. 5). Partiularly important for small pressures! Set point adjustment must be performed in installation position. 6 7

5 Use in Hazardous Loations The pressure swith type D1X/D2X is designed and approved for the protetion lass "intrinsi safety i" and "explosion-proof enlosure d". The pressure swith type D1S/D2S has none of the approvals stated above. The intrinsially safe swithes marked as Ex ia must be operated with a ertified swith amplifier (see Fig. 6). DX swithes with explosion proof enlosures are designed and ertified to be used aording to UL, CSA and ATEX regulations. Design onditions, approval data and instrutions must be observed arefully. The wiring between swith and Ex i isolation amplifier must meet the loal safety requirements. The ustomer must provide for a highly ondutive onnetion between swith and grounding. With option Ex i: The models having light-alloy (aluminium) enlosures or enlosure parts must be proteted against all impat or frition whih an ignite the explosive atmosphere. Unproteted area Ex ia area 7 Tehnial Data See data sheet Dimensions in mm (inh) (1.89) approx. 7 leads about 450 (17.72) long Proess onnetion approx. 55 Mounting bore 5 (0.197) 29 (1.14) 58 (2.28) D1S 45 (1.77) 90 (.54) 45 (1.77) 90 (.54) D2S 90 (.54) (0.9) (0.9) 45 (1.77) Slotted hex 45 (1.77) adjustment srew size 8 Ciruit * Ciruit * 90 (.54) NO 28 (1.1) approx (0.24) * Slotted hex adjustment srew size 8 NC GRD Fig. 7: Metal diaphragm pressure swith type D1S.../D2S... Zener barrier type Swith amplifier NAMUR Fig. 6: Operation of pressure swithes in intrinsially safe areas 6 Maintenane/Cleaning Maintenane The pressure swith is maintenane free. Cheking the set points lies within the disretion of the user. The usual preventive maintenane work in aordane with the PED and ATEX guidelines must always be arried out. Small setpoint drifts may our during the initial use of the swith (run-in period). To minimize the setpoint drift we an perform a run-in (ageing) proess in our works on request. Larger or ontinuing setpoints drifts during the normal use of the swith may indiate that the measuring system is not used orretly within the speified limits, exeeding the design riteria or is worn-out. This might lead to metal fatigue of the measuring system and it therefore should be replaed before an ultimate rupture of the metal diaphragm might take plae. Please onsult your supplier or Barksdale diretly for guidelines 8 9

6 D1X D2X Adjustable ranges Terminal lip 45 Ground onnetion 51 (2.01) 77 (.0) 2 (0.906) Conduit onnetion ½NPT 166 (6.55) 11 (0.4) Ciruit * Conduit onnetion ¾NPT 67 (2.64) 2 (0.906) 166 (6.55) Ciruit * 11.5 (0.41) (0.4) Pressure range ode Adjustable range Inreasing pressure Dereasing pressure Max. operating pressure Proof pressure (short term) Max. hysteresis of swith types (end of range) H, GH M, GM 197 (7.756) 120 (4.724) 51 (2.01) 21 (0.827) 21 (0.827) Proess onnetion ø8 (1.496) ¼" NPT Proess onnetion ¼" NPT Conduit onnetion ½NPT * Slotted hex adjustment srew size 8 Fig. 8: Metal diaphragm differential pressure swith type D1X.../D2X... Approval data for Ex i swithes (D1X/D2X) Approval: II 1 GD Ex ia IIC T6 Ga Ex ia IIIC T0 C Da Certifiate no.: ISSeP08ATEX016X/1 Permissible ambient temperature: -40 C +75 C Eletrial data for intrinsially safe appliation: Ui = 28V Ci = 40 pf Ii = 50 ma Li = 4 µh Standards applied: IEC : 2011, IEC : 2011, IEC : 2006 Approval data for Ex d swithes (D1X/D2X) Approval: 71 (2.795) Adjustment srew* II 2 G II 2 D Certifiate no.: ISSeP08ATEX024X/ Permissible ambient -40 C +75 C temperature: Ex db IIC T6 Gb Ex tb IIIC T80 C Db IP66 Standards applied: IEC : A11:201 IEC :2014 IEC : (0.4) ø125 (4.92) 11 (0.4) ø125 (4.92) Proess onnetion ¼" NPT Conduit onnetion ½" NPT Overpressure Vauum 2SS SS SS SS SS SS SS Eletrial Ratings Miro swith H M GH Speial Charateristis Miroswith with silver ontats Miroswith with silver ontats Miroswith with gold plated ontats for low voltage and low urrent Volt AC 50/60 Hz Ind. A Res. A Volt DC 6 to Ind. A Res. A Notes 0,50 0,5 Small hysteresis; high AC / low DC loads 5,00 1,00 0,25 15,0 2,0 0,4 Medium hysteresis; high AC and DC loads ,00 1,00 low hange-bak values GM , 0, Medium hysteresis We reommend to use a prefuse of the maximum urrent rating from the table above aording to the load swithed. We reommend gold plated ontats for all intrinsially safe and other appliations with low voltage/power. 11