Hach 5500sc SiO2, Operation Manual

Page: 14 / 468

4. Select SET FUNCTION>PID CONTROL and then select the applicable options in the
ACTIVATION menu.
Option Description
SET MODE AUTO—the signal is automatically controlled by the algorithm when the analyzer uses
proportional, integral and derivative inputs.
MANUAL—the signal is controlled by the user. To change the signal manually, change the
% value in MANUAL OUTPUT.
PHASE Selects the signal result when process changes occur.
DIRECT—signal increases as the process increases.
REVERSE—signal increases as the process decreases.
SET SETPOINT Sets the value for a control point in the process.
PROP BAND Sets the value for the difference between the measured signal and the necessary setpoint.
INTEGRAL Sets the period of time from the reagent injection point to the contact with the measuring
device.
DERIVATIVE Sets a value that adjusts for vacillation of the process. The majority of applications can be
controlled without the use of the derivative setting.
TRANSIT TIME Sets the value to stop the PID control for a selected period of time when the sample moves
from the control pump to the measurement sensor.
5. Select SET FUNCTION>LOGARITHMIC and then select the applicable options in the
ACTIVATION menu.
Option Description
SET 50% VALUE Sets the value corresponding to 50% of the process variable range.
SET HIGH VALUE Sets the high endpoint (upper value) of the process variable range.
6. Select SET FUNCTION>BILINEAR and then select the applicable options in the ACTIVATION
menu.
Option Description
SET LOW VALUE Sets the low endpoint of the process variable range.
SET HIGH VALUE Sets the high endpoint (upper value) of the process variable range.
SET KNEE POINT VALUE Sets the value at which the process variable range divides into another linear
segment.
SET KNEE POINT CURRENT Sets the value of the current at the knee point value.
Relay setup
1. Push menu and select SETUP SYSTEM>SETUP OUTPUTS>RELAY SETUP.
2. Select the relay.
3. Select an option.
Option Description
ACTIVATION The menu list items change with the selected function. Refer to Relay activation options
on page 15 for more information.
SELECT SOURCE Selects the output. Options: None (if the relay is not configured), the analyzer name or
calculation (if a calculation formula has been configured). Refer to
Set up the calculation
on page 12.
14 English