YSI 5200A
151
YSI 5200A
150
-
Changing control method between PID/PWM and Set Point may result in
invalid set point, control and alarm value configurations. Always reconfirm
control menus configuration when control mode is changed.
Set Point Control
When a system is operating in Set point control mode control and alarm relays en-
ergize when user configured values are reported to the 5200A from the input sensor
or device. A control relay remains energized until the the system set point value is
processed by the 5200A.* Configure sensor control relays using AquaManager - see
page 146. See Set Point Values - page for alarm relay functionality.
*exception - high temperature, and high and low analog aux and E-Aux systems
may also be configured for a timed set point mode - see page 153.
Follow page links below to see examples of instrument menus displayed for various
sensor systems configured for set point control mode.
- E-Aux 4/20mA system Set point control example - page 178;
-Temperature E-Aux Set point control mode example - page 165;
-DO Set point control mode example - page 171;
-PID/PWM and PID 4/20mA control mode example - page 176;
Below are screen shots of an E-Aux temperature system menu configured in Set
Point control mode.
Control relays configured in the Set Point control mode energize when a user config-
ured control value is received from the input device and is processed by the 5200A.
Configuring the 5200A
Control relays can be configured to raise and/or lower non digital sensor systems.
Configure high and/or low alarm systems to activate peripheral devices and/or
to provide alarm notification messages when alarm condition(s) exist. Configure
values outside of acceptable operating control range as high and low alarm values.
Set Point Control Values
Range low and Range high values set the acceptable operating range for the water
system. Control system(s) do not become active when value(s) are within acceptable
control range. See figure 4.7 - page 151. Enabled control relays energize when the
sensor reports a value
≤
the range low control value or ≥ range high control value.
Control relays are typically wired to devices used to raise or lower certain water
parameters in order to maintain the system as close to set point as possible. Control
relays remain energized until the sensor reports a value ≤ set point (when dosing
down to lower specific water parameter) and/or ≥ set point (when dosing up to
raise specific water parameter). Exception - high temperature, high and low pH and
high and low conductivity may also be configured for a timed set point mode - see
“Timed and Normal control mode” information included in specific sensor setup
sections that follow. Sensor low control range starts at -1 significant digit below set
point value. High control range starts at +1 significant digit above set point value.
Figure 4.7 shows how the 5200A operates based on a set point control sensor setup
configuration. In the example provided DO range low and range low 2 devices will
energize at
≤
5.0 and
≤
4.0 respectively. The alarm low system becomes active at
≤
3.5.
Range #1
Low
Alarm
ON
High
Alarm
ON
High
Range #1
ON
Optimal
S
etpoint
Value
Lower
Parameter
Values
High
Alarm
Setpoint
Low
Alarm
Setpoint
Higher
Parameter
Values
DO Range #2
High
Range #2
ON
Low
Range #1
ON
Low
Range #2
ON
Acceptable
Operating
Range
Temperature have 1 Control Range
DO has 2 Control Ranges
3.5 mg/l 4.0 5.0 8.1 8.5
8.7 8.9
Figure 4.7
Notes:
-
Configure sensor control relays using AquaManager - see page 146.
-
Changing control mode may result in invalid set point, control and alarm value
configurations. Always reconfirm sensor setup system menu configuration
when control mode is changed.
Configuring the 5200A
