Operating Instructions PS12 - PKP Prozessmesstechnik GmbH
Contents
1. PKP Prozessmesstechnik GmbH Borsigstrasse 24 D 65205 Wiesbaden Nordenstadt Tel 06122 7055 0 Fax 06122 7055 50 Operating Instructions PS12 Electronic miniature pressure switch Contents 1 Introduction 2 Safety Information 3 Electrical Connection 4 Adjusting the Switching Point 5 Maintenance 6 Specifications See data sheet in the appendix BRWWN WN 1 Introduction Series PS12 pressure switches are noted for their reliable function and easy operation To obtain the greatest benefit from this device please observe the following cautionary statement Persons who are responsible for setting up or operating this device must be sure to read the and understand the operating instructions and the safety information pertaining to it 2 Safety Information 2 1 General Instructions To ensure safe operation the device must only be operated according to the information in the operating instructions When the device is in use the regulations and safety standards applicable to the specific application must also be observed This statement also applies to the use of accessories 2 2 Proper Usage Series PS12 are designed to transform a pressure into one or two electrical output signals Any application extending beyond this specific intended use does not constitute proper usage Series PS12 pressure switch must not be employed as the sole means of avoiding hazardous conditions in machinery and installations The2. machinery and installations must be designed in such a manner that faulty conditions and malfunctions will not present hazardous situations for operating personnel 2 3 Qualified Personnel Series PS12 must only be used by qualified knowledgeable personnel trained in correct use of these devices Qualified personnel are those persons familiar with setting up and assembling these devices placing them in service and operating them In addition such personnel must also be qualified to perform the work associated with the application for which the device is being used PS12 E 1 SAM 03 05 05 Page 2 3 Electrical Connection Round plug connector M12x1 4 pin Cable outlet P switching N switching P switching N switching M12x1 Cable outlet Power supply UB 1 brown OV OV 3 blue Switching output SAI 4 black Switching output SA2 2 white 4 Adjusting the switching point The switching point is adjusted with the system under pressure The switching point is adjusted with setting screw as follows Turn the setting screw clockwise to increase the switching point The setting screw is self locking and does not have to be secured against turning The torque applied should not exceed 30 Nm The integrated switch status LEDs are located in the lower part of the black plastic upper section These LEDs illuminate when the switching output is occurring 4 1 Adjustment procedure for variants NC contact with adj
3. rigeration systems compressors etc In addition to generally accepted safe practices all applicable regulations must be observed Be sure to take proper precautions during maintenance work PS12 E 1 SAM 03 05 05 Page 4
4. ustable hysteresis The switching point and the hysteresis are adjusted with the two setting screws S1 and S2 Screw S2 adjusts the switch for the pressure value screw S1 adjusts the maximum pressure value If the S2 switching point is set above the switching point for S1 then the output acts like a normal pressure switch with a hysteresis of 5 S2 determines the switching point S1 has no effect To correctly adjust the switching point and the hysteresis proceed as follows PS12 B 1 SAM 03 05 05 Page 3 1 Turn the S2 setting screw counter clockwise all the way to the left hand stop minimum 2 Turn the S1 setting screw clockwise all the way to the right hand stop maximum 3 Apply the switching point pressure to the pressure switch in a test system 4 Turn the S1 setting screw counter clockwise to adjust the switching point 5 Set the pressure for the lower switching point 6 Turn the S2 setting screw clockwise to adjust the hysteresis Caution The leads for pressure switches with M12x1 plug connectors must not have any integrated LEDs 5 Maintenance Mechanical pressure switches are maintenance free The measuring accuracy as per DIN EN 837 of the pressure switch should be checked regularly Testing or recalibration must be performed only by trained personnel with suitable equipment Caution When working with hazardous media such as oxygen acetylene combustible materials or poisonous materials and when working on ref
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