Cleaning 56
12. CLEANING
Note: Setup selections do not change if a new parameter probe is wired.
The cleaning menu is used to program a time‑controlled cleaning function that uses the configured relays to
activate valves, pumps or compressed air to automate probe cleaning.
Two types of cleaning may be programed: Simple and Advanced.
Simple cleaning is suitable for any application in which the automated use of water flushing or a directed air
stream is sufficient as a cleaning medium. A jet of water or air is directed toward the probe tip, and deposits
are loosened and swept away. The flushing typically occurs directly in the process.
Advanced cleaning supports the use of two programmable relays. One for the rinse or flushing with water, and
a second to activate a valve or pump for chemical cleaning agent.
Cleaning Cycle & Rinse Relay Configuration (during cycle)
•
Cleaning cycles can be initiated manually by digital input, timer (programmed interval), or by scheduling.
•
The frequency and duration of the cleaning cycle can be programmed to meet the requirements of the
particular application.
•
With Advanced cleaning is selected, long press (a few seconds) the
ur
keys simultaneously to stop a
cleaning cycle manually. The cleaning is stopped but the cycle will complete the rinse and recovery phases
before returning to the measurement or process control.
• Calibration cannot be started when Simple or Advanced cleaning is in progress.
• Cleaning can not be triggered while calibration is being performed.
• Automatically cleaning the process probe can be seen as a disruption of the normal measuring or control
modes. As the cleaning cycle starts, the controller is placed in HOLD mode.
• Rinse relay configuration
Simple cleaning: the configured rinse relay is activated, through the rinse time, followed by a recovery
time as the probe system is reacclimated to the process; the cleaning cycle ends and the controller returns
to the normal Measure and Control service.
Advanced cleaning: the configured rinse relay is activated and remains on throughout the cleaning. After
the pre‑wash rinse time has expired, the second wash relay is on for the wash time. As this time expires,
the post‑wash rinse timer starts followed by a recovery timer as the probe system is reacclimated to the
process; then the cleaning cycle ends and the controller returns to the normal Measure and Control service.
This rinse or wash cycle can be repeated multiple times, as desired.
Navigation
• From Main Menu, press the
ud keys to select Cleaning.
• Press Start to start a cleaning cycle.
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