User Manual
YSI 5200A
144
YSI 5200A
145
Temperature
Menus →Sensor Setup→Temperature
See Set Points, Control, and Alarms - page 128 before conguring the temperature
system. Since most heaters and chillers have their own thermostats, their thermo-
stats can be used as a backup temperature control system. Set the heater thermostat
several degrees above the desired temperature and the chiller thermostat several
degrees below the desired temperature.
Range Low and High Control
Temperature high control can operate in two dierent modes, normal or timed.
Temperature low control operates in normal mode only. In the normal mode, control
relay is energized until the set point value is reached. For normal control congure,
set chiller on time to 0. e chiller o time will be ignored.
In temperature high control timed mode, the control relay is energized for the chiller
on time, regardless if the sensor value has returned to the set point value. Chiller o
time is user selectable. To avoid chiller compressor damage, congure the chiller
hold o time to a value of eight (8) minutes or more. Aer chiller on time expires,
the control relay de-energizes for the congured chiller o time. Aer the chiller o
time expires and if the value is still in control range, the control relay will reenergize.
A chiller o time must be congured in the timed mode or the control relay will
never de-energize regardless of sensor value.
Directions to Congure Temperature Sensor
Connect probe assembly - 1. page 60.
Enter Temperature Sensor Setup menu2.
Menus →Sensor Setup→Temperature
Use3.
▲
and
▼
to scroll and highlight submenus.
Press4.
to select.
Conguring the 5200A
Congure submenus.5.
Press 6. to save conguration and return to Run Screen.
Notes:
Celsius temperature set point, control, and alarm values are congured -
to the 10ths digit. Fahrenheit values are congured to the 100ths digit.
However, Fahrenheit display values and temperature system operation
are based on values truncated to the 10ths digit.
See 30 Second Sensor Hold O - - page132.
Active sensor control timers are reset aer systemwide events. Systemwide -
events de-energize relays. Example - chiller on time is congured for eight
(8) minute on time. Energized chiller (control down) relay de-energizes
when 5200A goes into Svr Hold. e chiller on relay had been energized
for three (3) minutes before the Svr Hold occurred. Svr Hold time is
one (1) minute. Aer Svr Hold time expires, the sensor control system
is reset. If sensor is reporting control low condition, the chiller on time
will be for eight (8) minutes and not the remaining ve (5) minutes of
the chiller on time prior to Svr Hold.
Temperature display format (°C or °F) is user selectable. Changing the -
temperature scale automatically recomputes set points.
Temperature values are stored in the sensor data log in °C regardless of -
display format.
Temperature values aect DO, conductivity, and pH values. It is important -
to verify that the temperature sensor is measuring accurately.
Control down relay (chiller) energizes for original “on time” if chiller “on -
time” is recongured when relay is energized.
Salinity
Menus →Sensor Setup→Salinity
When enabled, the salinity system will display a ppt value computed from the 5200A
conductivity sensor.
Notes:
When conductivity is enabled, salinity is ALWAYS calculated by the -
conductivity sensor value regardless if salinity is enabled. is value is
used in the DO mg/L calculation.
e salinity value is displayed at the Run Screen when salinity is en- -
abled.
Salinity cannot be enabled when conductivity is disabled. -
e 5200A can display ppt values up to 80 ppt when calculated from the -
conductivity sensor.
Conguring the 5200A