Setra-system Model 270 Manual do Utilizador descarregar pdf

Operating Instructions

Model 270 Pressure Transducer

General Information

Your Setra transducer has been carefully calibrated before shipment to you, and it should be handled with

the same care given any precision instrument. Pressure range and dimensions are reported on the

specifications bulletin for the transducer.

Ambient Conditions

Do not use in ambient conditions corrosive to anodized aluminum, or submerge in liquids, subject to spray

or vibration environment.

Electrical Connections:

Standard

“Belden” Cable Lead Optional

Function (#8723 Grey Cable) “Tensolite” Cable Lead

Positive Excitation Red White

Positive Output Green Yellow

Negative Output White Brown

Negative Excitation Black Black

Case Shield Shield

Electrical

The electrical circuit is equivalent to a 4-terminal network which can be grounded at only one point, either

at the negative excitation or the negative signal output lead, but must not be commoned or grounded at

more than one point.

The pressure transducer must be operated with the case connected either to the negative excitation

terminal or to the negative output terminal. Failure to do this may result in damage to, or unsatisfactory

operation of the unit. This connection may be made by connecting shield and black (negative excitation)

leads or alternatively by connecting the shield and negative output signal leads together. Best shielding

against noise will be obtained by connecting the shield and negative excitation leads. Circuit is reversed

voltage protected for at least 5 minutes. Internal transient suppression network is provided for short

duration transients to 150 volts.

In some instances, use of long cables (several hundred feet long) , may introduce enough cable capaci-

tance into the output circuit to cause output oscillation. If encountered, this oscillation may be eliminated

by connecting a 100 ohm resistor (1/8 watt or larger) in series in each of the output leads at the end of the

2 foot transducer cable. These series resistors of course add to the output resistance.

Adjustments (with cover removed)

CAUTIONS: 1. Before making any adjustments, determine which circuit board diagram on

Page 2 matches the circuit board in your transducer.

2. Turn off excitation power during cover removal or replacement.

3. Touching any adjustments other than zero or span may necessitate

recalibration and voids the warranty.

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Página 1 - Model 270 Pressure Transducer

Operating InstructionsModel 270 Pressure TransducerGeneral InformationYour Setra transducer has been carefully calibrated before shipment to you, and

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ZERO OUTPUTOutput can be adjusted to zero by potentiometer as shown in diagram. Unit factory adjusted to0.00 VDC output (±5mV).SPANCan be adjusted by

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INSTALLATION INSTRUCTIONS FOR MULTIPLE HOOK-UPOF 4-WIRE SETRA PRESSURE TRANSDUCERSOPTION #1Uses a single, ground referenced power supply for excitatio

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OPTION #3Uses a single, ground referenced power supply for excitation and either a single, isolated readout with abipolar switch that “breaks before m

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LIMITED WARRANTY AND LIMITATION OF LIABILITYSETRA warrants its products to be free from defects in materials and workmanship, subject to the follow-i

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Setra-system Model 270 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Setra-system Model 270. Setra System Model 270 User Manual Manual do Utilizador

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