705-5100-F21 datasheet(27/52 Pages) MAGNETROL

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4.4

User-Calibration Parameters

One of the main advantages of the Enhanced Eclipse Model

705 transmitter is that the device does not need to be cali-

brated in the field. Every Enhanced Eclipse Model 705

transmitter is shipped from the factory precisely calibrated.

Part of the advantage of PROFIBUS PA™ is to provide the

ability to monitor changes and make adjustments to a trans-

mitter. The fieldbus concept allows a user to make calibra-

tion adjustments if deemed necessary.

NOTE: The original factory calibration settings are restored when a new

probe length value is assigned.

It is highly recommended that factory calibration be used

for optimum performance.

Contact the factory for information on how to perform a

User Calibration.

4.4.1 Factory Parameters

The following parameters are used for either

troubleshooting or are parameters adjusted at the

factory. They should never be changed in the field.

The factory-adjustable calibrated parameters are WINDOW,

CONVERSION_FACTOR, and SCALE_OFFSET.

WINDOW is used to adjust for the variations in the analog

section of the Eclipse TDR measurement engine. CON-

VERSION_FACTOR and SCALE_OFFSET are the main

factory calibration settings.

WINDOW: determines the amount of delay between the

generation of the transmitted signal pulse and the start of

the measurement cycle.

FID_TICKS: a measure of the time to the fiducial (refer-

ence) pulse.

LEVEL_TICKS: a measure of the time to the level of the

product being measured.

CONVERSION_FACTOR: the slope of the factory-set

calibration line.

SCALE_OFFSET: the intercept of the calibration line.

4.4.2 Firmware Version

The last parameter in the TRANSDUCER block gives the

firmware version of the transmitter.

FIRMWARE_VERSION: displays the version of the

firmware.

57-645 Eclipse Guided Wave Radar Transmitter - PROFIBUS PA™

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