KROHNE BM 70 M - Manual (Page 57)

BM 70 M 57
Fct. 3.6.1. FUNCTION S
Use this function to select the measured variable.
• OFF (= deactivated; Fct. 3.6.2, 3.6.3 and 3.6.4 are no longer selectable,
i.e. they are skipped over).
• LEVEL
• DISTANCE
•
CONVERSION
• REFLECTION
• ERROR OPEN (default)
• ERROR CLOSED
(Explanatory notes: see Table overleaf)
Fct. 3.6.2. TYPE S
• This function is not shown (is skipped over) when OFF or ERROR OPEN or ERROR CLOSED
is set under Fct. 3.6.1. Not significant is this case!
•
Use this function to set the type of switching output:
HIGH (= contact closes when upper limit of threshold + hysteresis / 2) exceeded
LOW (= contact closes when lower limit of threshold - hysteresis / 2) exceeded.
Fct. 3.6.3 THRESHOLD
• This function is not shown (is skipped over) when OFF, ERROR OPEN or ERROR CLOSED
is set under Fct. 3.6.1. Not significant in this case!
• Use this function to define the threshold (limit value).
• Setting of LEVEL or DISTANCE under Fct. 3.6.1:
Unit same as for Fct. 3.1.1 TANKHEIGHT. If a reference or tank bottom offset is set, this must
be taken into consideration!
• Setting: CONVERSION under Fct. 3.6.1:
Unit same as in Fct. 3.2.3 UNIT.CONV.
• Setting: REFLECTION under Fct. 3.6.1:
Setting range : 0...100.
Fct. 3.6.4 HYSTERESIS
• This function is not shown (is skipped over) when OFF, ERROR OPEN or ERROR CLOSED
is set under Fct. 3.6.1. Not significant in this case!
• Use this function to define the hysteresis.
• Setting: LEVEL or DISTANCE under Fct. 3.6.1:
Setting range and unit same as for Fct. 3.1.1 TANKHEIGHT.
•
Setting CONVERSION under Fct. 3.6.1:
Unit same as in Fct. 3.2.3 UNIT.CONV.
• Setting REFLECTION under Fct. 3.6.1:
Setting range: 0...100.
Examples of application and setting see Sect. 8.5