Hach sc1000 - Manual (Page 81)

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Advanced Operations
SYSTEM SETUP
OUTPUT SETUP
mA OUTPUT INT/EXT
Select OUTPUT card 1,2,3 or 4
SELECT SOURCE
Default value: No source
Selects a probe or creates a formula which delivers the process value that is processed by the
current output card.
SET PARAMETER
Default value: No Parameter
Selects a parameter of the selected source.
DATA VIEW
Default value: INPUT VALUE
Sets the displayed and logged measured value.
INPUT VALUE
Displays the process value which is read from the selected source after it has been processed
by the internal formula parser (if prompted)
CURRENT Displays the calculated output current
SET FUNCTION Default value: LINEAR CONTROL
LINEAR CONTROL Tracks the measurement value.
PID CONTROL Sets the sc1000 controller as a PID controller.
SET TRANSFER
Default value: 10 mA
Sets the substitute value for the output current in case the selected source reports an internal
error, is disconnected from the system or its output mode is set to 'Transfer value'.
ON ERROR MODE
Default value: SET TRANSFER
Sets the sc1000 controller reaction if an internal error occurs.
HOLD
The current output card operates constantly with the last valid value read from the selected
source.
SET TRANSFER The current output card uses a substitute value for the output current.
SET MODE
Default value: DIRECT
Defines the point in time when the PID controller increases the Output current
DIRECT The SNAP SHOT value is lower than the SETPOINT and vice versa.
REVERSE The SNAP SHOT value is higher than the SETPOINT and vice versa.
SET FILTER
Sets the record time (in seconds)
The output current is based on the average of recorded values during a period of time. The
period set in this menu.
SCALE 0 mA/4 mA
Default value: 0-20 mA
Sets the output current range to 0–20 mA or 4–20 mA.
SET HIGH VALUE
Default value: 20
Sets the selected source value when the output current shall be 20 mA.
SET LOW VALUE
Default value: 0
Sets the selected source value when the output current shall be 0 mA (Scale is 0-20 mA)
respectively 4 mA (Scale is 4–20 mA).
MAXIMUM
Default value: 20 mA
Sets an upper limit for the possible output current value.
This menu item is displayed if SET FUNCTION is set to PID CONTROL.
MINIMUM
Default value: 0 mA
Sets the lower limit for the output current.
This menu item is displayed if SET FUNCTION is set to PID CONTROL.
SET SETPOINT
Default value: 10
Sets the process value
The PID controller tries to adjust to this process value.