GPI GM Serie Guía De Operaciónes página 8

Output: Customer Equipment, 0-20 mA Sensing, Frequency Sensing, Built-in Loop Power Supply
1
GM.or.IM.Series
2
Flow.Meter
Dual.Reed.Switch
3
4
NOTE..1:. Loop.power.supply.electrically.isolated.from.customer.equipment
NOTE..2:. Actual.value.of.loop.current.(mA).is.disregarded.
NOTE.3:. 4-20.mA.and.Pulse.Output.option.available.only.with.Reed.Switch.input
*.Optional.to.use.HL-HF.IN.
OPERATION
Setting 4-20 mA Endpoints
All.units.are.shipped.with.the.following.items.preset:
•. 4.mA.setpoint.=.10.Hz
•. 20.mA.setpoint.=.1000.Hz
•. Response.time.=.0.7.second
You.may.change.any.of.the.items.
Any.new.values.you.set.for.these.items.are.automati-
cally.saved.when.the.transmitter.is.powered.down,.and.
automatically.restored.the.next.time.power.is.applied.
Procedure
.
Before.you.start,.the.fluid.pumping.system.should.be.
ready.to.make.two.simple.calibrating.runs,.first.at.the.
lowest.anticipated.flowrate,.and.then.the.second.at.the.
highest. anticipated. flowrate.. For. best. accuracy,. you.
should.include.a.separate.flowrate.indicating.meter,.such.
as.an.appropriate.GPI.model,.in.the.fluid.flow.path..Posi-
tion.yourself.so.you.can.easily.operate.the.transmitter's.
pushbuttons..If.possible,.you.should.be.able.to.see.the.
indicator.light.(the.small.window.beside.the."4".button).
8
W I R I N G D I A G R A M 10
— 4-20 mA or 0-20 mA Output and Pulse Output —
Customer Equipment With Built-in Power Supply
Input: Reed Switch
INPUTS OUTPUTS
*.HL-LF.IN
GPI.4-20.mA
Local.Com
Transmitter
Loop.(+)
(current)
Min.. V.=.8.5.
Max..V.=.35
Loop.(–)
(current)
CAUTION:. When.reassembling.the.faceplate,.make.sure.that.the.enclosure.
seal.is.not.crimped.or.twisted..Do.not.over-tighten.corner.screws.
(hand.tighten.only)..Faceplate.can.be.rotated.90°.
Setting the Low (4 mA) Endpoint:
1.. Start.the.fluid.pumping.system..Set.it.for.steady.flow.
at.the.lowest.anticipated.rate.(or.the.rate.at.which.
you.want.a."minimum".indication).
2.. Wait.while.the.fluid.flow.is.uninterrupted.for.at.least.
10.seconds.
3.. While. watching. the. transmitter's. indicating. light,.
press.and.hold.both.its."SET".and."4".buttons..Re-
lease.them.when.the.light.blinks.
NOTE:..The.length.of.time.between."button.press".and.
"light. blink". depends. on. the. transmitter. response.
time.. The. maximum. is. 5.2. seconds.. If. you. can't.
see.the.indicator.light.(example:.if.you're.outdoors.
in.bright.light),.you.can.safely.just.count.to.10.while.
holding.the.pushbuttons..
NOTE:. .After. setting. the. minimum,. the. loop. current.
should.be.registering.at.or.near.4.mA..Don't.worry.
if.it's.not.exact,.it.will.be.correct.after.setting.the.high.
(20.mA).endpoint.
Customer
Equipment
Common
Open.Collector.
Pulse-In