SKF P203 - Processing of the Low-Level Signals with External Control and Monitoring of the Pump; Display of the Low-Level Signal; Remaining Running Time of the Pump with a Low-Level Signal

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4.6 Processing of the low-level signals
with external control and monitoring of
the pump
This information applies to pumps with a V control circuit
board and for pumps without a circuit board, with
external control and monitoring.
In order to avoid a premature low-level signal (e.g.,
caused by air inclusions or wave formation in the
lubricant) in situations with external control and
monitoring, the external control must be programmed to
comply with the following conditions.
• The pulses of the intermittent low-level signal must be
reset after every work cycle.
NOTE
The pulses must never be allowed to accumulate
across multiple work cycles. This can result in a
premature low-level signal.
• Work cycle ≥ 32 seconds:
– A minimum of 6 reed switch signals are required per
work cycle.
• Work cycle ≥ 24 seconds ≤ 32 seconds:
– A minimum of 4 reed switch signals are required per
work cycle.
• Work cycle ≤ 24 seconds:
– The number of reed switch signals required must be
adapted to suit the expected operating conditions.
Please contact our Customer Service.
4.6.1 Display of the low-level signal
The low-level signal is processed externally as shown on
the terminal diagram.
4.6.2 Remaining running time of the pump
with a low-level signal
The owner-operator must ensure that the pump is
stopped no later than 4 minutes after a low-level signal is
detected (4 pulses).