Endress+Hauser Liquistation CSF34 - Page 130

Operation Liquistation CSF34
130 Endress+Hauser
Menu/Setup/Additional functions/Limit switches/Limit switch 1 ... 8
Function Options Info
Delta value Settings depend on the
measured value
Operating mode = Change rate
The slope of the measured value (MV) is
monitored in this mode.
If, in the specified time frame (Delta time), the
measured value increases or decreases by more
than the specified value (Delta value), an event
is generated. No further event is generated if the
value continues to experience such a steep
increase or decrease. If the slope is back below
the limit value, the alarm status is reset after a
preset time (Auto confirm).
Events are triggered by the following conditions
in the example given:
t
2
- t
1
< Delta time and ∆MV1 > Delta value
t
4
- t
3
>Auto confirm and ∆MV2 < Delta value
t
6
- t
5
< Delta time and ∆MV3 > Delta value
Delta time 00:00:01 ... 23:59:00
Factory setting
01:00:00
Auto confirm 00:01 to 23:59
Factory setting
00:01
t
MV
t
1
t
2
t
3
t
4
t
5
t
6
MV
1
MV
2
MV
3
A0028526
 70 Rate of change
10.6.2 Sensor cleaning programs
L
CAUTION
Programs not switched off during maintenance activities.
Risk of injury due to medium or cleaning agent!
‣
Quit any programs that are active.
‣
Switch to the service mode.
‣
If testing the cleaning function while cleaning is in progress, wear protective clothing,
goggles and gloves or take other suitable measures to protect yourself.
Selecting the type of cleaning
The user can choose from the following cleaning types:
• Standard clean
• Chemoclean
• Chemoclean Plus
State of cleaning: Indicates whether the cleaning program is active or not. This is for
information purposes only.
Selecting the cleaning type
1. Menu/Setup/Additional functions/Cleaning: Select a cleaning program.
 You can configure 4 different types of cleaning which you can assign individually
to the inputs.
2. Cleaning type: For each cleaning program decide which type of cleaning should be
performed.