Hach sc100, User Manual

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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 34 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 34 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
1. SET MODE: AUTO or MANUAL
2. PHASE: DIRECT or REVERSE controller operation.
3. SET SETPOINT: enter the setpoint the PID control will control the process to.
4. PROP BAND: control the proportional band for the PID control.
5. INTEGRAL: control the integral action time period in minutes.
6. DERIVATIVE: control the settings for the rate control.