YSI 5500D-1 - Manual (Page 78)

YSI 5X00
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YSI 5X00
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- Aux temperature and ODO temperature values are not accessible at the 5X00.
Temperature readings can only be obtained using AquaManager. Readings
will be shown in the AquaManager datalog in either °C or °F based on the
user configured temperature display format.
- Celsius temperature set point, control, and alarm values are configured to the
10ths place. Fahrenheit values are configured to the 100ths place; however,
fahrenheit display values and temperature system operation are based on
values truncated to the 10ths digit.
- See 30 Second Sensor Hold Off - page 228.
- Temperature display format (°C or °F) is user selectable. Changing the
temperature units automatically adjusts set points to new temperature units.
- Temperature readings are stored in the sensor data log in °C regardless of
display format.
- Temperature values affect DO readings. It is important that the temperature
sensor is reporting accurately.
- When disabling an aux temperature system that has been assigned to a DO
channel, be sure to reconfigure the user defined temp source or enable another
aux temperature source for that DO system.
DO 1-4
Menus → Sensor Setup→DO 1-4
See Control Mode and Alarms - page 138 before configuring the DO system.
5400
Salinity and Temperature Compensation for DO Measurements
In order to report accurate DO values, the salinity and temperature of the water
around the sensor must be known and compensated for. For accurate DO mg/L
readings, the salinity value of the water being monitored should be entered as a ppt
(parts per thousand) value in the DO salinity menu.
Each DO system uses the temperature value from the configured temperature
sensor or user defined value entered in the DO sensor set up temperature source
menu. Aux temperature systems can be assigned to any of the four DO systems.
The DO system temperature compensation value is always taken from the tem-
perature sensor in the ODO probe.
Notes:
- Changes to salinity affect DO mg/L value.
- Changes to salinity do not affect DO % sat values.
- Configure a temperature source or enter a user defined value for each en-
abled DO system. Verify that the configured temperature value or assigned
temperature sensor is accurate for the water system being monitored around
the DO sensor.
Two Range Controls for DO
Each 5X00 DO sensor input has two low and two high control ranges. This dual
range allows for more control over oxygen levels in the water system. Example - DO
Set Point Control range low control becomes active causing the air injection system
wired/configured to relay #1 to energize. DO levels continue to fall, activating range
low control two a pure oxygen injection system wired and configured to relay #2.
Directions to Configure DO Systems
5400
5500 5500
5400
Set Point
Control
Mode only
Configuring the 5X00 Configuring the 5X00