YSI 5200A - Manual (Page 77)

YSI 5200A
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YSI 5200A
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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 off
time is user selectable. To avoid chiller compressor damage, configure the chiller
hold off time to a value of eight (8) minutes or more. After chiller on time expires,
the control relay de-energizes for the configured chiller off time. After the chiller off
time expires and if the value is still in control range, the control relay will reenergize.
A chiller off time must be configured in the timed mode or the control relay will
never de-energize regardless of sensor value.
Directions to Configure Temperature Sensor
1. Connect probe assembly - page 61.
2. Enter Temperature Sensor Setup menu
Menus →Sensor Setup→Temperature
3. Use
▲
and
▼
to scroll and highlight submenus.
4. Press

to select.
5. Configure submenus.
6. Press
to save configuration and return to Run Screen.
Notes:
- Celsius temperature set point, control, and alarm values are configured
to the 10ths digit. Fahrenheit values are configured 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 Off - page 141.
- Active sensor control timers are reset after systemwide events. Systemwide
events de-energize relays. Example - chiller on time is configured for eight
(8) minute on time. Energized chiller (control down) relay de-energizes
when 5200A goes into Svr Hold. The chiller on relay had been energized
for three (3) minutes before the Svr Hold occurred. Svr Hold time is
one (1) minute. After Svr Hold time expires, the sensor control system
Configuring the 5200A
is reset. If sensor is reporting control low condition, the chiller on time
will be for eight (8) minutes and not the remaining five (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 affect 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 reconfigured 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. This value is
used in the DO mg/L calculation.
- The salinity value is displayed at the Run Screen when salinity is en-
abled.
- Salinity cannot be enabled when conductivity is disabled.
- The 5200A can display ppt values up to 80 ppt when calculated from the
conductivity sensor.
Configuring the 5200A