OPERATION
6
99
OPTIFLEX 1300 C
www.krohne.com
01/2008 • 4000172301 - HB OPTIFLEX 1300 R02 en
Measuring mode limits
In direct mode, the instrument directly receives the reflection of the signal from the surface of
the tank contents.
TBF mode lets the instrument measure one product with low
ε
r
. Unlike direct mode, the signal
travels through the liquid or solid to the end of the probe. It is reflected back to the electronics.
The liquid or solid must have a stable dielectric constant for accurate measurement.
How to prepare an installation for an instrument that measures in TBF mode
•
If the probe end is not attached, the minimum distance between the probe end and the tank
bottom must be 300 mm / 12".
•
There must be no objects in a diameter of 600 mm / 24" around the probe (except coaxial
probes).
How to configure the instrument to measure in TBF mode
•
Go to Supervisor > Advanced setup > Installation setup > Measuring mode
Supervisor > Advanced setup > Installation setup > Measuring mode
Supervisor > Advanced setup > Installation setup > Measuring mode
Supervisor > Advanced setup > Installation setup > Measuring mode.
•
Select TBF from the menu. Press
^
.
•
If you know the exact value of the product's dielectric constant, go to Supervisor > Advanced
Supervisor > Advanced
Supervisor > Advanced
Supervisor > Advanced
setup > Installation setup > Product Er
setup > Installation setup > Product Er
setup > Installation setup > Product Er
setup > Installation setup > Product Er.
•
Type in the exact value. Press
^
.
Measuring mode
Probe type
Minimum dielectric constant
Direct
Coaxial
1.4
All other
probes
1.6
TBF
All probes
1.1
CAUTION!
Do not change the product
ε
r
value in Product
ε
r
(menu item C.1.14) unless the new value is
known. If an incorrect value is used, the instrument will not measure accurately.
INFORMATION!
The instrument usually measures in automatic measurement mode
automatic measurement mode
automatic measurement mode
automatic measurement mode. If it cannot find a signal in
direct mode
direct mode
direct mode
direct mode, the instrument will switch automatically to TBF mode
TBF mode
TBF mode
TBF mode.
HB_OPTIFLEX1300_EN_D4_080428.book Page 99 Tuesday, April 29, 2008 2:47 PM