Walchem ehe series Instruction Manual page 23

Electronic metering pump
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ALARM Indications
(1)
In ANALOG Input Operation, if the incoming current matching
360SPM (typically, 20mA=360SPM) is exceeded, the OVER
will become backlit. The pump will continue to operate at
360SPM during this condition.
(2)
While programming the Analog Input Setpoints, if the same
value (current or SPM) is set for both Setpoint 1 and 2, "ERR 1"
will be displayed for 3 seconds. It will return to the
programming menu so the setpoints can be corrected.
(3)
In DIGITAL Input Operation (Multiply or Divide modes), if the
incoming pulses come in either during operation or exceed the
pump doing 360SPM, the OVER will be come backlit. If the
Pulse Input Memory is on, the pump will store the extra pulses
(max. of 255 incoming pulses) and work them off as it can to
catch up.
20

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