Emerson Guided Wave Radar Level and Interface Transmitters 3300 - Manual (Page 90)

Reference Manual
00809-0100-4811, Rev CA
February 2006
Rosemount 3300 Series
6-10
Level and Distance
Calibration When calibrating the transmitter it is important that the product surface is calm
and that the tank is not being filled or emptied.
A complete calibration is performed in two steps:
1. Calibrate the Distance measurement by adjusting the Calibration Offset
parameter.
2. Calibrate the Level measurement by adjusting the Reference Gauge
Height.
Distance calibration
1. Measure the actual distance between the Upper Reference Point and the
product surface.
2. Adjust the Calibration Offset so that the Distance measured by the
transmitter corresponds to the actual distance.
The Calibration Offset parameter is available via
HART command [1, 4, 5, 5],
or
RCT: open the Advanced section in the Project Bar and choose Device
Commands>Basics>Set Calibration Offset.
Level calibration
1. Measure the actual Product Level.
2. Adjust the Reference Gauge Height so that the measured Product Level
corresponds with the actual level.
Figure 6-7. Distance and Level
calibration
Level
Reference Point
Reference Gauge
Height
Distance
Reference Point
C
A
LIB
R
A
T
E_L
EVE
L
C
ALI
BR
ATE_
D
IST
AN
C
E