300-R010-45G datasheet(32/36 Pages) MAGNETROL

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APPLICATION CHECKLIST

Check for the following sensitivities before proceeding to the

next section:

Vapors ____________________________________________

Mild _________________

Excessive _________________

Foam _____________________________________________

Surface Agitation ___________________________________

Angle of Repose ____________________________________

Temperature _______________________________________

Pressure ___________________________________________

Obstructions _______________________________________

If any of the above sensitivities are present, consult the fac-

tory for recommendations.

INSTALLATION CHECKLIST

Cable

1. _____ Was Belden 8102 used? If other cable was used,

permanent damage may have been done to the

transmitter.

2. _____ Is transducer wiring run in a dedicated conduit?

3. _____ Is transducer shield connected at both ends?

Transducer

1. _____ Check transducer alignment. Is it vertical?

2. _____ Is transducer mounted hand tight?

Overtightening may cause ringing, some installa-

tions may require using a shock absorber.

3. _____ Is minimum nozzle diameter 8 inches?

4. _____ Is maximum nozzle height 11 inches?

5. _____ Check beam path for obstructions, including

tank wall. Refer to page 6 for Ultrasonic Beam

Spread.

6. _____Check transducer housing for moisture.

TROUBLESHOOTING

Process

1. _____ Check for foam.

2. _____ Are vapors present? Visible vapors may cause

false level reflections, invisible vapors may alter

speed of sound.

3. _____ Is liquid surface turbulent?

4. _____ Does the tank have a mixing blade? Could it be

providing false level readings or creating a vor-

tex resulting in echo loss?

Transmitter

Enter the specified menu, and obtain the following informa-

tion before consulting the factory.

Measured Values Menu

Level _____________________________________

Temperature _______________________________

Distance __________________________________

System Configuration

Range ____________________________________

Span _____________________________________

Diagnostics Menu

Gain ______________________________________

Signal Strength __________________________%

OTHER INFORMATION

1. Is transmitter indoors or out? ______________________

2. What is the distance from the

transducer face to current level? ___________________

3. What is the transmitter’s

serial number? ___________________________________

4. What is the temperature?

a. At transmitter _________

b. At transducer ______

5. What is the media

being measured? _________________________________

RS-485 WIRING

Standard Beldon 8451 shielded, twisted pair, 22-gauge

stranded conductors may be used for interconnection of

units. Order cable through Magnetrol (part number, 009-

7146-001), specify length at the time of order; 10 feet (3 m)

minimum, 5000 feet (1524 m) maximum.

The preferred method of wiring is that all units be wired in

parallel. It is permissible to have branches, not exceeding

five feet, from the main wiring trunk. One master with a max-

imum of 31 slave devices is allowable.

1. Connect terminal A from the master device to terminal

A on all slave devices.

2. Connect terminal B from the master device to terminal

B on all slave devices.

3. Connect shielding from ground of master to ground on

all slave devices.

NOTE: Polarity among units in loop must be observed.

The master device and last (farthest) slave device in the loop

must have a termination resistor. This resistor is provided in

the Model 300/301 by jumper placement of JP1. The termi-

nation jumper JP1 is located under the shield, below the RS-

485 terminal block. The jumper JP1 should be in positions 2

and 3 (factory position) for all slave devices except the last

(farthest) device in the loop, which should have the jumper in

positions 1 and 2.

300-R010-45G 数据表(PDF) 32 Page - Magnetrol International, Inc.

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