KROHNE BM 102 Handbook - Manual (Page 34)

34 BM 102
Tank height: configuration of user menu PCSTAR 2 function 1.1.1 (HART
® Fct. 2.1.1.1)
This function is usually either defined as true tank height or as factory configured probe length, L
1
(see diagram on preceding page) if the former is not supplied by the customer in the order.
Why change the tank height?
• setting the distance in PCSTAR 2 Fct 1.1.1 (HART
® Fct. 2.1.1.1) to L
1
avoids having a non-
measurable zone underneath the probe where the measurement on the display freezes.
• when setting up a measurement scale as explained on the following pages, this means that
the level at the end of the probe will be taken as zero instead of the tank bottom.
How tank height affects measurement when either Level or Distance is measured
1 Tank height
2 Measurable height
(factory configured
probe length, L
1
)
3 Non-measurable
zone
4 With true tank
height (1) set in
Function 1.1.1 of
the User’s menu.
5 With factory-
configured probe
length, L
1
, set in
Function 1.1.1 of
the configuration
menu.
Example procedure 1 (using PCSTAR 2):
• to change true tank height (10000mm or 33 ft) to factory configured probe length, L
1
(9000mm
or 29½ ft) , and then save the new parameter. Refer to item 5 in the diagram above.
Step
Action Data entered / value set
1 Press F2 to connect to the
device Tank status screen displayed
(level reads 6750 mm)
2 Press F2 to enter configuration
menu Configuration menu displayed
3 Click on the data set field for
Fct. 1.1.1 Tank height This field currently reads
10000.00 (mm)
4 Type in the new value 9000.00
5 Press the button “F6-Send to
BM102” for the BM 102 to
immediately accept the new
value. n/a
6 Press “F3-Exit” to quit the
configuration menu. Tank status screen displayed
(level now reads 5750 mm)