Toshiba LF232*F Series Instruction Manual

Contents

specifications

TIC-LF502A7■ Piping Precautions(1) Flange connectionThe flowmeter has upstream and downstreamflanges on the ends of detector pipe. Connectthese flanges with the flanges on both sides ofpipeline bore using connection bolts afterinserting a gasket between them. See Figure 7.Tighten the bolts in even increments diagonallyacross.Figure 7. Flange Connection(2) Required straight pipe lengthThe straight pipe length is required to preventuneven flow velocity and a disturbance on thefluid surface in the detector pipe. The requiredstraight pipe length should be as follows:• Downstream side:L = 5D minimum• Upstream side:L = 10D minimumwhere,L = straight pipe length (straight pipeline length+ half length of detector pipe length)Note: The length of reducers, if used, can be counted asa part of straight pipe length.Figure 8. Required Straight Pipe Length onUpstream and Downstream Sides■ About establishment environmentDo not store or install the flowmeter:• Where there is direct sunlight.• Where excessive vibration or mechanical shockoccurs.• Where high temperature or high humidityconditions exist.• Where corrosive atmospheres exist.• Places that can be submerged under water.• Where there is sloped floor. To put the flowmetertemporarily on the floor, place it carefully withsomething, such as stopper, to support it so that theflowmeter will not topple over.In areas like the following, there may be the case thatinfrared switches do not function correctly. (If theseare unavoidable, use an appropriate cover.)(1) Where unit (operation panel) is exposed to directsunlight, reflection of light onto window pane anddiffused light reflection.(2) Where smoke and steam may occur.(3) Where exposed to direct snow, ice or mud.■ Ordering Information1. When ordering the LF502 flowmeter, refer toTable 1 (Type Specification Codes). An entrymust be made for each of the columns in each ofthese tables.2. Fluid characteristics:(1) Type of fluid to be measured and itscharacteristics(2) Fluid temperature(3) Fluid pressure(4) Electrical conductivity of the fluid3. Measuring range4. Digital I/O specifications5. Ordering scope:Actual flow calibration data:(Required or not)6. Other itemsSpecifications other than standard itemsObservationwindowObservationwindowUpstream flange Downstream flangeFlowdirectioGasketBoltFlow regulationvalve etc. Observation windowDetector10D minimum 5D minimum

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