Hach NA5600 sc Na+ Operations page 16

Option
LOW DEADBAND Sets the range where the relay stays on after the measured value increases above the
HIGH DEADBAND Sets the range where the relay stays on after the measured value decreases below the
OFF DELAY
ON DELAY
Figure 5 Alarm function
1 High alarm
2 High deadband
3 Low deadband
• FEEDER CONTROL function (refer to
Option
PHASE
SET SETPOINT
DEADBAND
OVERFEED TIMER Sets a time limit for how long the relay can stay on. Once an overfeed alarm is present,
16 English
Description
low alarm value. For example, if the low alarm is set for 1.0 and the low deadband is set
for 0.5, the relay stays on between 1.0 and 1.5.
high alarm value. For example, if the high alarm is set for 4.0 and the high deadband is
set for 0.5, the relay stays on between 3.5 and 4.0.
Sets a delay time for the relay to be set to off.
Sets a delay time for the relay to be set to on.
4 Low alarm
5 ON delay
6 OFF delay
Description
HIGH—Sets the relay to on when the measured value is more than the setpoint value.
LOW—Sets the relay to on when the measured value is less than the setpoint value.
Sets a measurement value as the setpoint value.
Sets the deadband value for the relay. If PHASE is set to LOW, the relay stays on until
the measurement value increases to more than the setpoint value plus the deadband
value. If PHASE is set to HIGH, the relay stays on until the measurement value
decreases to less than the setpoint value minus the deadband value.
it must be manually reset. Refer to
Figure 6 and Figure 7)
Reset the overfeed timer for relays
7 Time (x-axis)
8 Source (y-axis)
on page 21.