Emerson ROSEMOUNT 5300 Especificações descarregar pdf (Página 89)

Reference Manual

00809-0600-4026, Rev BA

December 2011

7-3

Rosemount Process Radar

COMMISSIONING Follow this commissioning procedure the first time the process is started at

actual operating conditions and actual process media.

Verification Review and verify that the following matches application and installation

requirements, as described in Section 5: 5400 Quick Installation Guide and

Section 6: 5400 Installation & Configuration.

• Mounting Consideration

• Mechanical Installation

• Electrical Installation

• Basic Configuration

Configuration Threshold settings

1. Review thresholds settings

2. If needed, use the following best practices to apply custom threshold

adjustments:

• Generally, the threshold should be at 20% of the surface peak.

Example: If the surface is 2000 mV, then the threshold should be set at

400 mV.

• It should never be closer than 200 mV to any disturbing objects.

Example: If there is a 500 mV peak from an obstacle, the threshold

around it should be 700 mV.

• The threshold should never be below 300 mV. For products with very

low dielectric constants, such as hydrocarbons, it may be required to

lower the threshold.

VERIFICATION

PROCEDURE

Step 1. Verify the

Correctness of Level

Reading

At normal operating conditions, compare the transmitter level, or interface

reading, with an independent measurement. Unfortunately, it often happens

that two independent measurements will not match up perfectly, but check the

sanity and the acceptable deviation.

The independent measurement can be done using a number of different

complementary devices, ranging from sight-glasses and hand-dipping to

redundant differential-pressure and displacer.

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Emerson ROSEMOUNT 5300 Especificações Página 89