STOCKTROL-H VIBRATING LEVEL SWITCH. Instruction Manual June 2002

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1 STOCKTROL-H VIBRATING LEVEL SWITCH Instruction Manual June 2002

2 Safety Guidelines Warning notices must be observed to ensure personal safety as well as that of others, and to protect the product and the connected equipment. These warning notices are accompanied by a clarification of the level of caution to be observed. Qualified Personnel This device/system may only be set up and operated in conjunction with this manual. Qualified personnel are only authorized to install and operate this equipment in accordance with established safety practices and standards. Warning: This product can only function properly and safely if it is correctly transported, stored, installed, set up, operated, and maintained. Note: Always use product in accordance with specifications. Copyright Siemens Milltronics Process Instruments Inc All Rights Reserved This document is available in bound version and in electronic version. We encourage users to purchase authorized bound manuals, or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc. Siemens Milltronics Process Instruments Inc. will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions. Disclaimer of Liability While we have verified the contents of this manual for agreement with the instrumentation described, variations remain possible. Thus we cannot guarantee full agreement. The contents of this manual are regularly reviewed and corrections are included in subsequent editions. We welcome all suggestions for improvement. Technical data subject to change. MILLTRONICS is a registered trademark of Siemens Milltronics Process Instruments Inc. Contact SMPI Technical Publications at the following address: Technical Publications Siemens Milltronics Process Instruments Inc Technology Drive, P.O. Box 4225 Peterborough, Ontario, Canada, K9J 7B1 techpubs@milltronics.com For the library of SMPI instruction manuals, visit our Web site: Siemens Milltronics Process Instruments Inc. 2002

3 INTRINSIC SAFETY WARNING Substitution of components may impair intrinsic safety. This device must be grounded to insure intrinsic safety. AVERTISSEMENT La substitution de composants peut compromettre la sécurité intrinsèque. Mettre ce dispositif à la terre pour en assurer la sécurité intrinsèque. SPECIFICATIONS Power: Enclosure: - 115/230 V, 50/60 Hz, 4 VA - cast aluminum - 3/4" NPT conduit entrance hole Probe: - type S stainless steel ( see exceptions ) - 1-1/2" NPT mounting - 1,000 kpa (150 PSI) maximum pressure rating - insertion length: - standard is 203 mm ( 8" ) - extended is 460 mm to 1510 mm (18" to 60" )in 150 mm ( 6" ) increments * dimensions are nominal - assembly: - standard is welded - extended: - threaded ( extension is 304 S.S.or plated steel ) - welded (food grade) Temperature: - electronics: -40 to 40 C (-40 to 105 F) - process material: -40 to 88 C (-40 to 190 F) Minimum Material Density: - 32 kg/m 3 ( 2 lb/ft 3 ) Maximum Pressure: Sensitivity: KPa - high or low, jumper selective Relay: - time delay: - 1 sec from loss of vibration - 2 to 5 sec from resumption of vibration - failsafe: - high or low, jumper selective - output: - DPDT (2 form C) contacts, rated at 250 V AC, 5 A Weight: Approvals: kg (7.5 lb) - CSA, FM : see device nameplate PL /04/05

4 Applications The Stocktrol - H Vibrating Level Switch detects the absence or presence of dry bulk solids in bins, silos and hoppers. It can be mounted to give high or low level alarms. The following list highlights some of the materials that the Stocktrol - H has been successful in monitoring. animal feed coffee beans gravel sawdust beans coffee, ground milk powder soda candies dehydrated mud peanuts spices carbon black fine ground glass polystyrene powder styrofoam pellets cellulose powder flour polystyrene chips sugar cement freeze-dried coffee potato chips tea leaves chalk grains puffed cereals tobacco cereals frozen french fries salt wood shavings clay powder granular plastics sand Operation General The Stocktrol - H is a vibrating level switch that provides a contact output indicating a high or low level in a bin. The signal from the electronic circuit excites a crystal in the probe, causing the blade to vibrate. When material contacts the blade of the probe, the vibration stops. This is sensed by the electronic circuitry which forces the relay to change state after a one second time delay. When the blade is freed, the vibration will resume after a few seconds of time delay and the relay will revert to its normal operating status. The shape of the blade and its vibrating action make it self- cleaning. Relay status LED 1 is illuminated when the relay is energized Sensitivity There are two sensitivity settings that can be selected by the J6 jumper on the circuit board. The A position is normally used first when setting up the Stocktrol-H. If the Stocktrol-H fails to give an alarm, set the jumper to B. The B position is used typically on sticky or relatively dense materials. PL /04/05

5 Failsafe / Relay The Stocktrol - H operates in either failsafe high (FSH) or failsafe low (FSL). The failsafe mode is selected by the J1 jumper on the circuit board: FSH - for high level alarm, the relay is de-energized ( LED off ) when the blade is in contact with material or power has failed. FSL - for low level alarm, the relay is de-energized ( LED off ) when the blade is free or power has failed. Failsafe operation is achieved by using the normally open contact of the relay in the annunciator or control circuit. F S L status F S H status bin relay LED bin relay LED n.c. n.o. on n.c. n.o. on NORMAL ALARM / FAILURE n.c. n.o. off n.c. n.o. off Installation The Stocktrol - H standard insertion length is normally screwed into the bin wall at the level to be monitored. The probe must be kept out of the path of falling material so as not to be damaged. If this is not possible, a shield must be constructed over the probe as shown. A shield must also be used when the Stocktrol - H is used for low level indication. gasket mounting flange angle iron bin wall PL-301 5

6 The extended version is designed for top mounting, whereby the probe is suspended vertically such that the blade will reach into the material at its maximum level. In cases where the extended probe is installed horizontally and a shield is required, it should be extended and adequately supported, over the length of the probe. THE MAXIMUM VERTICAL FORCE ON THE BLADE IS 20 N m (15 FT LB). When the probe is inserted horizontally, it must be turned until the blade is vertically oriented. This reduces the chance of material resting on the blade, causing false alarms. Alignment of the blade is verified by the two slots in the mounting gland nut. These will be facing up and down when the blade is vertically oriented. When screwing the Stocktrol - H into the bin, use a wrench on the mounting gland nut. CONDUIT ENTRY SHOULD BE FROM THE BOTTOM TO AVOID ACCUMULATION OF CONDENSATE IN THE ENCLO- SURE. DO NOT SCREW BY TURNING THE HOUSING. slot mounting gland nut PLAN VIEW - horizontal installation note : slot signifies orientation of blade tank wall SIDE VIEW - horizontal installation PL-301 6

7 LAYOUT AND CONNECTION All wiring must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations. Field wiring must be on terminal block side only to maintain intrinsic safety. relay shown in de-energized condition relay status LED alarm jumper power connection relay connection (dry contacts) sensitivity jumper connection to probe component view side view terminal block view Notes : COM. = common or ground N.C. = normally closed N.O. = normally opened PL /04/05

8 STOCKTROL - H OUTLINE 25 mm (1") 104 mm (4.1") 51 mm (2") blade 100 mm ( 3.95" ) 1-1/2" NPT mounting 183 mm (7.2") 305 mm (12") approx. 3/4" NPT conduit entrance STANDARD probe 203 mm (8") approx. 25 mm (1") 104 mm (4.1") 51 mm (2") 1-1/2" NPT mounting blade 100 mm ( 3.95" ) 183 mm (7.2") 267 mm (10.5") approx. 3/4" NPT conduit entrance EXTENDED WELDED probe nominal insertion length ** ( see sizes below ) 25 mm (1") 104 mm (4.1") 51 mm (2") threaded extension * 1-1/2" NPT mounting blade 100 mm ( 3.95" ) 183 mm (7.2") * Threaded Extension 267 mm (10.5") approx. 3/4" NPT conduit entrance EXTENDED THREADED probe nominal insertion length ** ( see sizes below ) Supplied and assembled by Milltronics - 1" NPT schedule 80, 304 S.S. or plated steel. Refer to original equipment order. ** Nominal Insertion Length mm inches PL-301 8

9 PL /04/05 SCHEMATIC Stocktrol - H with S-4 probe Switch settings are typical. Refer to Operation for details. ref. 10D763

12 Siemens Milltronics Process Instruments Inc Technology Drive, P.O. Box 4225 Peterborough, ON.Canada K9J 7B1 Tel: (705) Fax: (705) c Siemens Milltronics Process Instruments Inc Subject to change without prior notice *7ml19981fk01* Printed in Canada Rev. 1.0

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P U L S A R point 210 Page 2 Fourth Edition - Version 1.0 Jan 2014 Copyright Copyright PULSAR Process Measurement Limited 2014. All rights reserved. No part of this publication may be reproduced, transmitted,