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Follow instruction manualThe instruction manual is part of the product and an important element within the safety concept.• Read and follow instruction manual.• A lways keep instruction manual available for the product.• P ass on instruction manual to all subsequent users of the product.1. Intended useThe product is applicable for liquids with specific conductivity over 10 µS/cm. Theswitching unit can sense the resistance between probes. Conductivity measurement is suitable only for detecting the presence of liquid at a given level of the tank. This level is represented by the length of the probe. The conductive switch is suitable for fìlling or emptying control with 2 to 4 relay outputs working simultaneously or for level detection of 2-4 independent levels (in 1 or 2 tanks) with 2 independent relay outputs.2. Safety and responsibilityIn order to provide safety in the plant, the operator is responsible for the following measures:• P roducts may only be used for its intended purpose, see intended use • N ever use a damaged or defective product. Immediately sort out damaged product.• M ake sure that the piping system has been installed professionally and serviced regularly.• P roducts and equipment shall only be installed by persons who have the required training, knowledge or experience.• R egularly train personnel in all relevant questions regarding locally applicableregulations, safety at work, environmental protection especially for pressurised pipes.The personnel is responsible for the following measures:• K now, understand and follow the instruction manual and the advices therein.3. FunctionThe level switch consists of 1 or 2 switching unit and the KLN-2 type probes. Probes are to be connected to the 2281 type probe socket head that can be screwed into the tank. lf the material of the tank or its internal insulation is not conductive then a reference probe should be used in addition to the one, two, three or four probe(s), if the material of the tank is conductive, the tank can be used as a reference probe.4. Technical Data4.1 Technical Data of the switching unitProbe Voltage 5 V AC Probe current < 1 mA ACSensitivityAdjustable: 5 kΩ ... 100 kΩMax. cable capacity 4 nF Response max. 400 ms Setting accuracy (mech.)± 5 %Delay Adjustable: 0.5 ... 10 s Relay output 2x SPDTSwitching voltage 250 V AC1, 24 V DC Switching current 16A AC1Switching power 4000 vA AC1. 384 W DC Electrical strength 4 kVMechanical life-span 3 x107 switches Electrical life-span 0,7x105 switches Power supply Un 24 V AC/DCVoltage range allowed nominal voltage -15 %...+100 %Power consumption max. 2.5 VA/ W Ambient temperature -20°C ... +55°CElectrical connection max. 2.5 mm 2 / with insulation 1.5 mm 2Electrical protection Class III Ingress protection IP 20Mechanical connection DIN EN 60715 rail Mass240 g6. Installation• Mount s witching unit on DIN EN 60715 rail.• Cut the KLN-2 type probes to the length required for level detection on site. • Screw probes into the sockets.• Tighten the probe with an M6 nut.•Use separators at every 0.5 m for multiple probe devices to keep the probes apart.7. Electrical Connectionlf the wall of the tank is conductive no reference probe is needed, ln this case terminal C is to be connected to the tank. On multiple probe units E1 and E2 are marked with 1,,.4, the reference probe is marked with C. Admissible length of cable between signal processor and probes depends on cable capacity and conductivity. Make sure E1 in upper level, E2 buttom level.8. Putting into operation8.1 AdjustmentThe green LED (U n ) shows that the unit is on, the energized state of the relays areindicated by the E1 respectively E2 LEDs. Operating mode, delay ON and delay OFF can be set with the DIP switch on the front panel. tE1(s) and tE2(s) potentiometers are for adjusting the delay time. The sensitivity setting (R potentiometer) should comply with lhe conductivity of the fluid. Do not set sensitivity higher than required because the vapour precipilation may lead to operation disturbance.Selection of delay type for input E1ta: delay OFF Georg Fischer Piping Systems Ltd CH-8201 Schaffhausen Phone +41(0)52 631 30 26 / info.ps @georgfischer .com / GFDO 6354_4 (07.14)© Georg Fischer Rohrleitungssysteme AG CH-8201 Schaffhausen/Schweiz, 2014Printed in SwitzerlandInstruction manual2281 Conductive multipoint switch with dual channel relayGF Piping SystemsGeorg Fischer Piping Systems Ltd CH-8201 SchaffhausenPhone +41(0)52 631 30 26 / info.ps@ /GFDO 6354_4 (07.14)© Georg Fischer Rohrleitungssysteme AGCH-8201 Schaffhausen/Schweiz, 2014Printed in Switzerland8.2 Level detectionThe relay allows level detection of 2 independent levels even in one tank or in two separated tanks.8.3 State of relaysE1 E2 E1 E2 E1 E2 E1 E2Function 2xDelay type E1 taFunction 2xDelay type E1 taFunction 2xDelay type E1 taFunction 2xDelay type E1 ta1xONtbtb1xONtbtb1xONtbtb1xONtbtb8.4 Level controlSelection of contacts depends on required function.9. Maintenance, RepairThe device does not require regular maintenance. Repair within and beyond the wanantyperiod is carried out at the manufacturer‘s location.10. Storage• Ambient temperature: -30 to +70 °C• Relative humidity: max. 85%11. DisclaimerThe technical data are not binding. They neither constitute expressly warranted cha-racteristics nor guaranteed properties nor a guaranteed durability.They are subject to modification. Our General Terms of Sale apply.。
instruct的用法及短语一、介绍instruct的基本用法instruct是一个动词，表示教导、指示或命令某人做某事。
它在口语和书面语中都十分常见，用途广泛。
本文将详细介绍instruct的基本用法及几个常用短语。
二、以人为对象的用法1. instruct somebody to do something这是最常见的使用方式，表示命令或指示某人去做某事。
例如：- The teacher instructed the students to complete their assignments by Friday.（老师要求学生们在周五之前完成作业。
）- The coach instructed his players to work harder and improve their teamwork.（教练命令球员们更加努力地训练并提高团队合作。
）2. instruct somebody how to do something表示教导或指示某人如何做某事。
例如：- My grandfather patiently instructed me how to ride a bicycle when I was a child.（我小时候，爷爷耐心地教我如何骑自行车。
）- The chef instructed his assistant on the proper way to prepare the dish.（厨师向他的助手详细说明了准备这道菜的正确步骤。
）三、以机构、组织等为对象的用法1. instruct someone in something表示向某人传授特定领域的知识或技能。
例如：- The university offers classes that instruct students in computer programming.（大学提供教授学生计算机编程的课程。
）- The company hired a language expert to instruct employees in business English.（公司聘请了一名语言专家，向员工教授商务英语。
Only use your product when fully assembled as described in the instruction Book. If the product isdamaged in any way stop using immediately and consult the store where you purchased yourproduct for guidance.We continually strive to improve our products, specifications may change without prior notice.●Incorrect assembly can result in severe personal injury and property damage.●Do not tilt chair or lean over the sides – always ensure all casters are firmly placed on a level surface.●Children should not play with the chair.●Do not lean over the arms. This could cause the product to become unbalanced and result injury.●Always use the chair on a flat, stable surface to prevent injury.●Do not stand on chair.●If the damaged product is irreparable, please dispose of the product. Using a damaged product may lead to personal inju ●This appliance is intended for indoor household use.●Only trained personnel can replace or repair seat height adjustment components with energy accumulators.●Keep this instruction manual for future reference.Check and make sure you get the components on the list, contact us for any missingBackrest x1Seatrest x1Seat Plate x1Right Armrest x1Left Armrest x1EGas Lift x1F1Base x1Caster x5Right Cap x12H 1Left Cap x1IAllen Wrench(5mm)Screw(1/4”x7/8”) x8JScrew(1/4”x1-3/8”) x4G22 356Tight Loose(For rocking)。
