Manual

2of16 MN301040 RevB
INTRODUCTION/TABLEOFCONTENTS StepOne
The DeltaSpan™ LD31 Series Intrinsically Safe Clean Water & Oil  or LD32 Series Intrinsically Safe Pump Lift
Station Pressure Level Transmitters are manufactured for years of trouble free service in the harshest
applications.Thepressuretransmittermeasurestheheightofliquidabovethepositioninthetankreferenced
to atmospheric pressure.The transmitter consists of a piezoresistive sensing element, encased in 316 SS
housing.TheLD31seriesfeaturesabulletnosedesignprotectsthediaphragmfromdamage.
Superiorlightningandsurgeprotectionutilizingdual arrestortechnology,groundedtocase,eliminatingboth
power supply  surges and lightning ground strike transients.Large diameter 316 SS diaphragm seal is non‐
clogginganddamageresistanttofloatingsolids.
Thetransmitterisequippedwitha270‐poundtensilestrengthshieldedandventedcable.Ventilationtubein
the cable automatically compensates for changes in atmospheric pressure above the tank.The vent is
protected with a maintenance free filter eliminating particulate or water droplets from entering the
transducer.Forextraprotectionagainsthighhumidityenvironments,FlowlineofferstheLD90‐3000desiccant
filterthatcanbeattachedtotheventtube.
 Excellentchemicalcompatibilitywith316construction
 Lightningandsurgeprotectiononallmodels
 Maintenancefreeventfilter
 LD31seriesfeaturesslimdesignfortightapplications
 LD32seriesfeatureslargediameter,non‐clogging,damageresistant,316SSdiaphragmseal
TableofContents
 Specification:...............................................................................................................................................3
 ControlDrawing:.........................................................................................................................................4
 Dimensions..................................................................................................................................................5
 SafetyPrecautions:.....................................................................................................................................6
 Components:...............................................................................................................................................7
 GettingStarted............................................................................................................................................8
HowtoconvertPressureintoLiquidHeight?.................................................................................8
Howtoselectthecorrectpressuretransmitter?...........................................................................8
HowdoesSpecificGravityaffectpressuretransmitters?..............................................................9
Howtoconfigureapanelmeterwhenapressuretransmitterisused?......................................10
 ElectricalInstallation.................................................................................................................................11
WireLength...................................................................................................................................11
Wiring–ControlDrawing.............................................................................................................11
 Wiring..................................................................................................................................................12‐13
 Installation................................................................................................................................................14
Interference..................................................................................................................................14
Termination...................................................................................................................................14
 Maintenance.............................................................................................................................................15
Testingthetransmitter.................................................................................................................15
 Warranty...................................................................................................................................................16
