KROHNE BM 702 EN - Manual (Page 10)

10 Installation and operating instructions BM 702 (06/04)
Function of keys (only together with local display)
Operator control can be carried out with the aid of local display unit after opening the
housing. However, a particularly convenient form of parameter setting is offered by the PC
program PC-CAT (special accessories, see above).
→ (cursor key)
- selects the configuration menu,
- branches the menu to the next lower level,
- shifts the cursor* to the next column on the right.
↑ resp. ↓ (select key)
- branches the menu to the next digit on the same
level,
- changes the content (digit, text character) at the
cursor* position.
↵ (ENTER key)
- branches the menu to the next higher level,
- stores newly entered parameters,
- executes displayed functions,
- selects special functions (e.g. error memory,
see Sect. 5).
* The cursor position is signalled by flashing of the character at the appropriate place.
Meaning of status markers (only for version with local display)
The 6 markers
▼ x below the local display only show information about the status of
measurement and are no error displays!
▼1:
No current measured value: The device is searching for a new value. If the
search for a plausible level fails for a certain time, "SIGNAL DOWN" appears as
error display.
▼ 2: Signal too strong: Mean of reflected microwaves is very high. Gain is automa-
tically stepped down.
▼ 3: Poor spectrum: Brief showing of this marker has no significance. If permanently
on, this may result in uncertain (incorrect) measured values or the error message
"NO M.VALUE".
▼ 4: No measured value as yet: Evaluable measured values not available after the
device has been started up. Measured value automatically set to the level of the
tank bottom. This marker disappears when the first valid measured value is
obtained.
▼ 5: Tank bottom: In tanks with dished bottom, for example, the measuring signal can
"disappear" if measurements are carried out near the bottom. The measured value
is then automatically set to the level of the tank bottom.
▼ 6: Measurement frozen: Device is in the block distance detection (see below).