KOBOLD SM FLOWMETER/SWITCH User Instructions
Contents
1. KOBOLD SM FLOWMETER SWITCH User Instructions OBOLD KOBOLD Instruments Inc 1801 Parkway View Drive Pittsburgh PA 15205 Phone 412 788 2830 Fax 412 788 4890 www koboldusa com R2_4 13 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 Diagram 4 1 5 1 5 2 5 3 5 4 Table 2 1 Table Of Contents KOBOLD SM FLOWMETER SWITCH General mr aras cre es ete A a het eel NE on e a a ag alia SPEGHEALONS TE A RT AAA NR Installation za a a an nn ad Adjusting the Setpoint for Decreasing Flow 4 Adjusting the Setpoint for SM Flow Switch Models w o Indicator Arrival of Damaged Equipment MAING ANCE itera ES ea eh ANA eee List Of Diagrams Electrical Connections 0000 ce ee eee eae List of Tables Material Composition 0000000 eee eee SM FM Rev 4 16 13 SM KOBOLD SM FLOWMETER SWITCH User Instructions CAUTION For safety reasons please read the cautionary information located at the end of the manual before attempting installation 10 General The KOBOLD SM flowmeter switch is intended for functions involving flow triggered switching or measuring switching of liquids and gases The all metal construction of the instrument makes it usable in situations where the medium is under high pressure 3600 PSIG maximum for the brass version and 5000 PSIG maximum for the stainless steel version The SM flow switch can be factory fitted with up to three reed switch2. ch model Operation outside these limitations will cause damage to the unit and can potentially cause personal injury Fluid should never be allowed to freeze inside the sensor Make a Fail safe System Design a fail safe system that accommodates the possibility of switch or power failure In critical applications KOBOLD recommends the use of redundant backup systems and alarms in addition to the primary system FM Rev 4 16 13
3. es to allow a corresponding number of setpoints to be monitored The SM flowmeter because of its external flow indicator is limited to two reed switches The principle of operation of the SM is that of the well known float in a conical tube or variable area flowmeter The KOBOLD SM however uses our patented cylindrical control tube with V groove to replace the conical tube This method has advantages in that the float is stabilized over its entire measuring range and offers a large flow range in a small instrument In the SMO SMW and SMF versions the action of gravity is augmented by a calibrated restoring spring to provide different measuring ranges than are possible by use of gravity alone The float has a built in permanent magnet that actuates a reed switch when equipped mounted on the exterior housing of the device The optional switch is therefore hermetically separated from the medium The optional switches are user adjustable so that setpoints may be adjusted to any flow value within the range of the instrument 20 Specificati Measurement Accuracy 5 of Full Scale Maximum Medium Temperature 240 Degrees F with PP Float 160 Degrees F with PP Float 230 PSIG with Brass Body Metal Float 3600 PSIG with SS Body Metal Float 5000 PSIG FM Rev 4 16 13 SM witch ifications Maximum Voltage Maximum Current Maximum Power Dissipation Environmental Protection cCSAus Approval Table 2 1 Material Composition Brass Ver
4. g brakes Both are sudden rather than gradual The damage to the wall can be substantial not to mention the car b The water hammer causes surges in fluid pressure which could cause the measurement instrument s pressure limit to be exceeded resulting in failure and possible personal injury c Fluid surges as well as the water hammer can be particularly damaging to empty flowmeters since there is no back pressure in the device The damage is caused once again by momentary excess pressure To avoid these surges fluid lines should remain full if possible and water flow should be introduced to the device slowly d If the instrument is isolated with inlet and outlet valves the flowmeter must be completely drained when said valves are both closed Failure to do so could result in damage to the device caused by thermal expansion of fluid e Freezing of water in the instrument must be avoided since the resultant expansion will damage the flowmeter and make it unsafe for use Wiring and Electrical Section 2 0 Specifications and Section 4 0 Electrical Connections provide the voltage and current limitations and the wiring for the various sensor types The sensor electrical ratings should never be exceeded Electrical wiring of the sensor should be performed in accordance with all applicable national state and local codes Temperature and Pressure Section 2 0 Specifications provides the temperature and pressure limits for ea
5. intain all components The failure to do so could result in property damage or serious injury Inspect instrument for damage upon arrival Cracked fractured bent or otherwise damaged instruments must not be put into use since the device is weakened to an unknown extent Refer to Section 6 0 Arrival of Damaged Equipment for additional information Media and Chemical Compatibility The maximum tolerances of the device have been determined using water and air If using other media especially corrosive media it is critically important that the user determine chemical compatibility with our instruments KOBOLD Instruments Inc cannot accept responsibility for failure and consequences resulting from use of media other than water air and nitrogen Material Compatibility Make sure that the model which you have selected is chemically compatible with the application liquids While the meter is liquid and spray resistant when installed properly it is not designed to be immersed Proper Installation in Flow System Install the device in a fully supported position within your flow system This avoids excessive stresses which may damage the instrument In particular a Ensure that the plumbing leading to and from the instrument is fully supported and that the instrument does not perform the physical function of a joint b When calculating stress on the device caused by plumbing the weight of the medium in the pipes must be considered as wel
6. l c Misaligned runs of rigid piping can cause large stresses when connected to the instrument Do not connect in such a fashion d When connecting fittings hold the instrument fittings rigid with a correctly sized wrench Do not install by twisting the instrument into the pipe fittings e Do NOT install by holding the device housing to provide counter torque to the pipe fitting f Use an appropriate amount of PTFE tape on male threads of fitting This reduces the twisting stresses produced by tightening the fittings into each other 9 Do not use pliers or wrenches on the housing as this may damage it h Do not overtighten as this may fracture the fittings FM Rev 4 16 13 While Operating the Flow System During operation there are a number of situations to avoid a The sudden cessation of fluid flow causes what is typically referred to as water hammer Most people are familiar with this phenomenon from their home experience it is the cause behind the loud clank of water pipes which occurs when faucets are turned off too suddenly The cause behind this water hammer is quite easy to visualize Water is fairly massive The amount of water in long runs of pipe is quite substantial When the faucets are turned off suddenly especially from a full on condition the water has considerable momentum and does not want to stop flowing The situation is similar to stopping a car by running into a wall rather than by applyin
7. nspect the packing in which it was delivered If damage is visible notify your local carrier at once since the carrier is liable for a replacement under these circumstances If your claim is refused please contact KOBOLD Instruments for further instructions 70 Maintenance The KOBOLD SM contains few active mechanisms to wear out Operation is achieved using a calibrated spring SMO SMW and SMF versions and magnetism This means that reliable operation and a long life may be expected from the SM We do strongly recommend that since dirt is the primary enemy of this instrument only clean or filtered media be passed through it Do not use this meter on fluids capable of corroding the 301 SS material of the spring 8 0 Need help with your SM Flow Switch Call one of our friendly engineers at 412 788 2830 FM Rev 4 16 13 Caution PLEASE READ THE FOLLOWING GENERAL FLOW METER MONITOR WARNINGS BEFORE ATTEMPTING INSTALLATION OF YOUR NEW DEVICE FAILURE TO HEED THE INFORMATION HEREIN MAY RESULT IN EQUIPMENT FAILURE AND POSSIBLE SUBSEQUENT PERSONAL INJURY FM Rev 4 16 13 SM User s Responsibility for Safety KOBOLD manufactures a wide range of process sensors and technologies While each of these technologies are designed to operate in a wide variety of applications it is the user s responsibility to select a technology that is appropriate for the application to install it properly to perform tests of the installed system and to ma
8. s rail until it reaches its stops The reed contact will be deactuated at this point 3 Open the medium feed line and set flow to desired volume 4 Slide the reed contact toward the inlet until the contact actuates 5 Tighten the hold down screws 53 Adjustina the Setpoint for C ina El Adjust the setpoint for decreasing flow as follows 1 Loosen the hold down screws on the reed contact housing 2 Slide the contact toward the inlet along the rail until it reaches its stops The reed contact will be actuated at this point 3 Open the feed line and introduce flow until the reed contact deactuates then lower the flow value to the desired minimum FM Rev 4 16 13 5 SM 4 Slide the contact toward the outlet until the reed contact actuates again 5 Tighten the hold down screws 54 Adjusting the Setpoint for SM Flow Switch Model indi Alternativelv vou mav adjust the approximate switching setpoint as follows 1 Loosen the hold down screws on the reed contact housing 2 Slide the contact until the marking line on the switch housing aligns with the desired flow as indicated bv the scale on the instrument housing 3 Tighten the hold down screws Slight readjustment of the switch mav be necessarv to dial in the desired switching characteristics 6 0 Arrival of Damaged Equipment Your instrument was inspected prior to shipment and found to be defect free If damage is visible on the unit we advise that you carefully i
9. sion Housing Ni Plated Brass Slotted Nozzle Ni Plated Brass Float Ni Plated Brass PP Al 304 SS Fittings Ni Plated Brass Seals NBR Spring 301 SS SMO SMW SMF 30 Installation 240 VAC SPST N O 1 5 A SPDT 0 8 A SPST N O 50 VA 50 W SPDT 30 VA 30 W IP 65 IEC 259 Equal to NEMA 4 SS Version 304 SS 304 SS PP Al 304 SS 304 SS FKM 301 SS SMO SMW SMF CAUTION For safety reasons please read the cautionarv information located at the end of the manual before attempting installation To install proceed as follows 1 The SM flowmeter switch must be installed in the appropriate orientation as indicated for the specific model 2 The medium must not contain any solids or contaminants that could precipitate out of solution and deposit on the instrument s inner walls This would prevent proper operation of the device Unclean media should be filtered upstream of the SM KOBOLD offers a magnetic screened filter suitable for such purposes type MFR 3 Do not install meter on large masses of ferritic materials or in areas where strong electric fields are present as this will hamper proper operation of the reed contact FM Rev 4 16 13 4 0 Electrical Installation Maximum values of current and voltage must not be exceeded on the reed relay If driving inductive or capacitive loads we recommend the use of a suitable isolation relay KOBOLD provides a line of relays for such instances If an isola
10. tion relay is not used a clamping diode is highly recommended for DC inductive loads to minimize contact arcing which will destroy the reed switch Di Ele N O Contact SPST Changeover Contact SPDT Reed switch Reed switch b me gt U R4 EA los switch R2 R i Load ka Protection I Lamp load with parallel or series Ik ni E Prodection with an RG circuit for a c resistance to the switch current and inductive load lt gt Reed switch Reed switch Load Diode Wire Capacitance Protection against high discharge from Protection with an idle diode for d c condensers and loadcapacitances current and inductive load FM Rev 4 16 13 SM 4 2 0 Operation We recommend that if possible a flow control valve be installed downstream of the instrument and be closed as pressure is introduced to the system Thereafter the control valve can be opened gradually to achieve the needed flow This procedure prevents oscillation of the float as the medium is introduced More importantly it prevents possible damage due to pressure surges as described in the cautionary section to the SM 5 1 Reading Flow Read the flow rate off the downstream edge of the indicator when equipped 52 susina s Hito ina El Adjust the setpoint for increasing flow as follows 1 Loosen the hold down screws on the reed contact housing 2 Slide the contact toward the outlet along it
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