Hach-Lange POLYMETRON 9500 User Manual - Manual (Page 29)

Option Description
LOGARITHMIC Signal is represented logarithmically within the process variable range.
BILINEAR Signal is represented as two linear segments within the process variable range.
6. From the OUTPUT SETUP menu, select ACTIVATION. Use the information in the table below the
chosen function to configure the options.
7. If TRANSFER is or will be selected as the ERROR HOLD MODE, or if the transfer will be used
during calibration or other functions within the sensor menu, select SET TRANSFER from the
OUTPUT SETUP menu and enter the transfer value.
8. From the OUTPUT SETUP menu, select SET FILTER and enter the filter value.
9. From the OUTPUT SETUP menu, select SCALE and choose the scale (0-20 mA or 4-20 mA).
• Linear control
Option Description
SET LOW VALUE Sets the low endpoint of the process variable range.
SET HIGH VALUE Sets the high endpoint of the process variable range.
• PID control
Option Description
SET MODE AUTO—the signal is automatically controlled by the algorithm within the analyzer using
proportional, integral, and derivative inputs.
MANUAL— the signal is controlled by the user through manual adjustment of the %
change value. This option is shown as MANUAL OUTPUT after the manual set mode is
selected.
PHASE The direction in which the signal responds to process change.
DIRECT—signal increases as the process increases.
REVERSE—signal increases as process decreases.
SET SETPOINT Creates a desired control point of process.
PROP BAND A function of the difference between the measured signal and the desired setpoint.
INTEGRAL The period of time from the injection point of a reagent to contact with the measuring
device.
DERIVATIVE Used to compensate for the 2 nd order effects of the process. The majority of applications
can be controlled without the use of the derivative setting.
TRANSIT TIME Stops all PID control for a selected period of time as the sample travels from the control
pump to the measurement sensor.
• Logarithmic
Option Description
SET 50% VALUE Sets the value corresponding to 50% of the process variable range.
SET HIGH VALUE Sets the upper value of the process variable range.
• Bilinear
Option Description
SET LOW VALUE Sets the low endpoint value of the process variable range.
SET HIGH VALUE Sets the high endpoint value of the process variable range.
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