Operating Instructions for Float Switches for Liquids Model: NSP
Contents
1. min 2 m Order details Example NSP weights Model Description NSP weights Bading weights NSP connection 1 PVC PVC cable gland G1 NSP connection 2 PVC PVC cable gland G2 NSP connection 1 MS Brass cable gland G1 page 6 NSP 03 06 NSP 11 Dimensions NSP S cable PPH plug PPH bushing TPK FEP Sil cable PPH bushing PPH ball TPK FEP Sil 12 Recommended Parts The float switch can be replaced only as a complete unit NSP 03 06 page 7 NSP 13 Declaration of Conformance We KOBOLD Messring GmbH Hofheim Ts Germany declare under our sole responsibility that the product Float Switches for Liquids Model NSP which relates to this certificate conforms to the standards listed below EN 61010 EN 61326 Following EWG guidelines are also fulfilled 73 23 EWG 89 336 EWG 93 68 EWG pe cn yuu H Peters M Wenzel General Manager Proxy Holder Hofheim 15 March 2006 page 8 NSP 03 062. KET WO Operating Instructions for Float Switches for Liquids Model NSP NSP 1 Contents Te TCOnte MiS nec iS dd dee he ioe 2 2 Note eiii tada iia dais 3 3 Instrumentdns pociones 3 A Regulation Se t A A AAA AAA ARO 3 Ds Operating POC E A A 4 6 Mechanical CONNOR SAA tdo 4 7 Electrical Connection 2 adds 5 8 Maintenance saat EE EEA EATE O ASA ee 5 Technical Ino Malo oo opel 6 As A O aaaea eaae enid 6 TE DIMENSIONS erene A A A A a 7 12 Recommended Parts tii a A tt a as Ed 7 13 Declaration of Conformance cu cuecen ccc edensmes vsencecueendeet exes eecesencearesentees ise 8 Manufactured and sold by Kobold Messring GmbH Nordring 22 24 D 65719 Hofheim Tel 49 0 6192 2990 Fax 49 0 6192 23398 E Mail info de kobold com Internet www kobold com page 2 NSP 03 06 NSP 2 Note Please read these operating instructions before unpacking and putting the unit into operation Follow the instructions precisely as described herein The devices are only to be used maintained and serviced by persons familiar with these operating instructions and in accordance with local regulations applying to Health amp Safety and prevention of accidents When used in machines the measuring unit should be used only when the machines fulfil the EWG machine guidelines 3 Instrument Inspection Instruments are inspected before shipping and sent out in perfect condition Should damage to a device be visible
3. compliance to electrical specifications or any probable danger arising through physical contact in case of a rupture a fault current protection is recommended against indirect touching according to EN 50178 After connecting external units with limit contacts all connection work is complete The unit can now be put in operation 8 Maintenance This float switch is almost a maintenance free unit Occasionally the cable should be inspected for damage A float switch with damaged cable must be immediately replaced NSP 03 06 page 5 9 Technical Information Float material Cable Max pressure Max temperature Medium density Contact Switch capacity Switching Hysteresis switching angle Class of protection polypropylene standard 4 m TPK cable 3 x 0 75mm thermoplastic rubber optional silicone FEP cable model NSP S 1 bar model NSP K 2 bar 5 60 C TPK cable 5 85 C silicone FEP cable model NSP S gt 0 9 kg dm model NSP K gt 0 6 kg dm changeover contact connectable as N C or N O contact max 250 Vac 150 Vpc 300 VA 60 W 1 mA 1 5 A 1 A at cos 0 7 approx 25 mm TPK approx 35 mm FEP approx 12 3 IP 68 10 Order Codes Order details Example NSP S W 04TPK Model Design Contact Cable S Stem foma 04TPK 4 m TPK cable l NSP K Ball form W changeover YYSIL Silicone cable min 2 m contact YYFEP FEP cable
4. is set by the side installation of the switch at the desired position or by clamping the cable The switch point is set using weights when installed at the top 6 Mechanical Connection Before installation e Ensure that the permitted maximum pressure and temperature defined for the unit are not exceeded see 9 Technical Information With open tanks the float switch should be lowered into the tank from the top The cable should be firmly held through a suitable cable grip Firm placement of the float switch is carried out through ballast weight or cable clamps on a guide pipe where a cable length of 50 mm between the clamp and the float has to considered With closed pressure less tanks installation of float switch is carried out by means of a threaded cable gland with R1 screw in thread accessory side wise and through the wall In order that the float switch may not be obstructed during its float movement at least 50 mm cable length between retaining grip and the float switch must be allowed page 4 NSP 03 06 NSP 7 Electrical Connection e Ensure that the supply lines are powerless e Connect the supply lines corresponding to desired switching function with the float switch cable e The cable junction should be made through a suitable connection socket and be protected against physical contact and moisture GN CE p NO blue RAN black NG brown Attention If there are any doubts regarding
5. we recommend a thorough inspection of the delivery packaging In case of damage please inform your parcel service forwarding agent immediately since they are responsible for damages during transit Scope of delivery The standard delivery includes e Float Switches for Liquids model NSP e Operating Instructions All the parts which are standard scope of delivery are included in the assembled unit The accessory parts such as terminal connections and ballast weight are separately packed 4 Regulation Use Any use of the Float Switch for Liquids model NSP which exceeds the manufacturers specification may invalidate its warranty Therefore any resulting damage is not the responsibility of the manufacturer The user assumes all risk for such usage The model NSP are used to monitor liquid levels Only those liquids may be measured against which the materials used in the construction of the unit are resistant By making use of two float switches one for the minimum level and one for the maximum level liquid level control for a system can be implemented NSP 03 06 page 3 NSP 5 Operating Principle The float comprises a hollow cylinder or a ball with integrated mercury switch or microswitch The contact is supplied as a changeover contact it can be connected as a N O contact or N C contact as an option The contact switches when the liquid passes above or below the horizontal float position The switch point
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