Baseline-systems BHM Series Hydrometer Manual de usuario descargar pdf (Pagina 9)

Hydrometers Operation and Maintenance Manual • 9

Recommended

Resistor Valves

Ω W

5 180 0.25

6 220 0.25

9 330 0.25

12 470 0.50

24 1000 1.00

Voltage (V+)

Resistor Values

NOTE: Correct polarity of the leads should be

checked carefully to prevent damage to

the sensor.

Specications, Cont.

Photo-Diode Electrical

Speciﬁcations

POSITIVE powers the IR light

(yellow wire)

Current Min: 15 mA to a maximum of 25 mA DC

through a resistor

•MaximumVoltage:28VDC

OUTPUT (clear wire)

Output–Opencollector

(Max. Load – 2 mA)

GROUND (bare wire)

Photo-Diode (PD & PDH) Register

• SensorcombinesanIRlightsourceandalightsensitive

diode in one package.

• Signalsarecreatedwhenthelightbeamcreatedbythe

IRlightisinterruptedbyarotatingelement.

• RequiresaconstantsupplyofDCpower.

Circuit Diagram

Output and Wire Leads

Note:Sunlightwillinterfere

withtheIRlightandmay

corruptorinterferewiththe

signal—keepdustcapclosed

during operation to ensure

propersignaloutput.

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Baseline-systems BHM Series Hydrometer Manual de usuario Pagina 9