090820 operating instructions .indd
Contents
1. gt Operating instructions Pressure transmitter intelligent electronics FSM Type DPSZ FSM Elektronik GmbH Scheffelstra e 49 D 79199 Kirchzarten Telefon 49 0 7661 98 55 0 Telefax 49 0 7661 98 55 11 info fsm elektronik de www fsm elektronik de The Model DPSZ and APSZ Transducers are for the measurement of very small pressures and diffe rential pressures of non aggressive gases The pressure sensing member comprises a pressure sen sitive berylium copper diaphragm An inductive transducing system provides the electrical output The Transducers are not explosion proof housed Terminal diagram EE Tc 5 H TPI SPAN Ol tes SPAN Pressure Pre eee ii m oy Unpui input KN M42 X15 1 0 i ae z SS 25 2 12 32 VDC Calibration The pressure sensors are calibrated in the factory If necessary recalibrate according to the calibration instructions Safe precautions and personnel protection For the correct and safe use of this instrument it is important that the VDE or similar association safety precautions as well as the precautions of the professional trade association having liability for industrial safety regarding the operation of electrical instruments and equipment be observed Installation Mount the transducers by the two side brackets Please avoid mounting in the proximity of Transformers Transmitters Motors they could generate noise and please do not mount cl2. nominal pressure via a T Junction to the pressure source and the reference pres sure and to the pressure port of the DPSZ for gauge pressure high side to the plus port and to a vacuum low side to the negative port Now adjust Trimmer P2 so the ammeter reads 20 mA Pressure Ampenmeter Source _ G Tra SPAN O Te SPAN Pressure ZERO Power Referenz Supply 4 Type APSZ 1 Both these items are as for Model DPSZ above 2 Wait for the sensor warm up ca 1 hour 3 Connect the pressure port via a T Junction to the power source and the absolute pressure reference Now apply the absolute pressure intended to correspond to 4mA output Set Trimmer P1 so that the ammeter reads accordingly 4 Span adjustment Connect the absolute pressure to a pressure port and apply the pressure intended to produce 20 mA output Now set Trimmer P2 so that the ammeter gives the appropriate reading Response time not for type DPSAZ C14 Capacitor for the electronical absorbability Response time t t Rx C Cxt 50kOhm R 50k Notes With some of the DPSZ options there are further Trimmers fitted P3 P4 P5 e TP3 Symmetry adjustment for sensors with plus minus ranges e TP4 Adjustment Trimmer for spezial ranges or spezial output modes e TP5 The ranging and matching of digital read outs These Trimmers are factory pre set Any readjustment should be avoided without prior reference to the Supplier Any readjustm
3. ent of the zero and span as per the instructions above do not require Trimmers TP3 to TP5 For any re calibration it is necessary to adjust only Trimmers TP1 and TP2 www fsm elektronik de
4. ose the heat sources Shocks or vibration should be damped out by employing anti vibration mountings The ideal mounting position is vertical with the pressure ports facing down wards The Transducers are factory calibrated in that position This position of mounting is also advantageous for preven ting the migration of condensation from the pressure lines into the sensor Operation Before operating the unit remove the cover so as to expose the electrical connections the terminal blocks Please connect the external cables carefully Never connect the supply to the protection The output of the Transducer is short circuit proof 2 Wire System DC Supply 12 32 Volt Smoothed DC gt Minus to terminal 1 gt Plus to terminal 2 When the power supply is on the output can be monitored In the event of some deviation in the output there are two items worthy of special attention gt Die Einlaufzeit des Sensors betr gt ca 1 Stunde Nach dieser Zeit mu das Sensorsignal bei Differenzdruck Null und bei konstanter Umgebungstemperatur stabil stehen gt The total warm up time of the Transducers is between half and one hour After that time the output signal will be sui table for zero differential pressure at constant temperature For ranges less than 10 mbar there is an attitude related zero shift After the warm up time of the Transducers this can be corrected by adjusting the null adjust Pot null adjust should be operated with the p
5. ressure ports unconnected www fsm elektronik de Connecting the pressure lines Positive high gauge pressure connects to the plus port Negative vacuum gauge or low gauge pressure connects to the minus port Model APSZ for absolute pressure has only one pressure port Please do not Blow into the pressure ports as diaphragms for less than 100 mbar are easily damaged by this procedure Transport and storage The storage temperature is from 10 C bis 70 C For onward transportation either to further destinations for even if the unit has to be returned please ensure that the pressure ports for differential Transducers are left open NB Transducers of the absolute type must only be transported by air in pressurised compartments Kalibrieranleitung For calibration use the following accessories Precision Pressure Source eg Digital Manometer For absolute pressure use absolute pressure reference Pressure refe rence Pressure source eg pump bellows etc Supply 12 32 VDC smooth Measuring inst ruments Appropriate meter to read current or voltage Type DPSZ 1 Connect the power supply 12 32 VDC and an ampermeter in series to Terminals 1 minus and 2 plus 2 Allow unit to warm up see operting instructions 3 To adjust the zero both the pressure ports must be open to the ambient pressure Set Trimmer P 1 so that the meter reads 4 mA 4 Span adjustment Connect the
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