8 digital network options, 9 system setup menu, Operation – Hach-Lange SC 100 User Manual

Page 36

Digital Network Options
32

Operation

4.8 Digital Network Options

The sc100 provides two digital communication methods with the controller (the digital network port
and the IrDA port). Either of the digital ports can be used to access setup data, measurement data,
or data/event logs. For the features available for each individual digital network port, refer to the
instruction sheet supplied with the selected network card.

4.9 System Setup Menu

OUTPUT SETUP (see

section 4.5.1 on page 30

for expanded menu information)

SELECT OUTPUT 1 OR 2

SELECT SOURCE

Press

ENTER

to access a list of all connected sensors and select the sensor that will drive the output.

SET PARAMETER

Press

ENTER

to select from the displayed parameters. Highlight the appropriate displayed parameter and press

ENTER

SET FUNCTION

Select LINEAR CONTROL for current output to track the measurement valve. Select PID CONTROL for the sc100 to operate
as a PID controller.

SET TRANSFER

Each analog output is normally active, responding to the measured value of its assigned parameter. However, during
calibration, each output can be transferred to this preset transfer value.

SET FILTER

Average measurements over time (0–999 seconds). Default is 0 seconds. The higher the value, the longer the sensor signal
response time will be to a change in the actual process value.

SCALE 0 mA/4 mA

Select 0 mA or 4 mA for minimum current (outputs will be set to 0–20 mA or 4–20 mA).

ACTIVATE

Dependent on Function selected previously. See

section 4.5.1 on page 30

for additional information.

FUNCTION set to LINEAR CONTROL

If LINEAR CONTROL was selected in SET FUNCTION, set the low and the high values for the current output here.

FUNCTION set to PID CONTROL

SET MODE: AUTO or MANUAL

PHASE: DIRECT or REVERSE controller operation.

SET SETPOINT: enter the setpoint the PID control will control the process to.

PROP BAND: control the proportional band for the PID control.

INTEGRAL: control the integral action time period in minutes.

DERIVATIVE: control the settings for the rate control.