Hach NA5600 sc Na+, Руководство по эксплуатации

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Option Description
SET FUNCTION ALARM (default)—Sets the relay to on when the measurement value is more than the
high alarm value or less than the low alarm value. FEEDER CONTROL —Sets the relay
to on if a measurement value is more (or less) than the setpoint value. EVENT
CONTROL —The relay toggles if a process value reaches an upper or lower limit.
SCHEDULER —Sets the relay to on at selected times regardless of the measurement
value. WARNING —Sets the relay to on when there is a warning or error condition.
PROCESS EVENT —Sets the relay to on when the analyzer does a selected operation.
SET TRANSFER Sets the relay to active (on) or inactive (off) when an error occurs if the ERROR HOLD
MODE setting is set to TRANSFER OUTPUTS. The default setting is INACTIVE (off).
Refer to
Set the error hold mode on page 21.
FAIL SAFE YES —Sets the normal condition for the relays to be active (on). NO —Sets the normal
condition for the relays to be inactive (off).
• ALARM function (refer to Figure 5 )
Option Description
LOW ALARM Sets the value where the relay is set to on in response to decreasing measured value.
For example, if the low alarm is set for 1.0 and the measured value drops to 0.9, the
relay activates.
HIGH ALARM Sets the value where the relay is set to on in response to increasing measured value.
For example, if the high alarm is set for 1.0 and the measured value increases to 1.1,
the relay activates.
LOW DEADBAND Sets the range where the relay stays on after the measured value increases above the
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 DEADBAND Sets the range where the relay stays on after the measured value decreases below the
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.
OFF DELAY Sets a delay time for the relay to be set to off.
ON DELAY Sets a delay time for the relay to be set to on.
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