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-
A "Check probe" error message during calibration means that the sensor is
unable to calibrate within the 5X00's specifications. This may indicate improper
sensor wiring (page 49), 5X00 location (page 27), sensor location or (page
34), the need to service the sensor, or a failed sensor.
-
Calibration of temperature sensors is not required and is not available.
-
Energized alarm relays for all systems de-energize when a front panel key
is pressed to enter the calibration menu. Alarm systems are not reset until
is pressed to return the instrument to the run screen.
Getting Ready to Calibrate
Calibrate DO sensor(s) by performing a one point calibration. Calibration can be
done to 100% Saturation (Sat) or mg/L. Calibrating to %Sat automatically calibrates
to mg/L and vice versa so it is only necessary to calibrate one or the other, not both.
For both ease and accuracy, YSI recommends calibrating in %Sat. Salinity com-
pensation for the mg/L readings is obtained from the user entered ppt value. This
value can be entered and modified in the DO sensor setup menu.
Figure 4.6
Configuring the 5X00
Figure 4.7
YSI 5X00
82
Notes:
-
A sensor must be enabled in order to calibrate.
-
For YSI 626250 cable/probe assemblies, keep the sensor guard installed dur-
ing the calibration to protect the membrane from possible physical damage
- figure 4.7.
-
When calibrating to mg/L, use a ring stand and clamp to secure the sensor in
the calibration water sample.
-
Older sensors may take longer to calibrate than new ones because the sensor
readings may take longer to stabilize.
Calibration Log
Calibration data is stored in the 5X00 calibration log. A calibration data record
includes sensor information, the time and date of the calibration, and the calibration
method. Press
at the Run Screen to view the calibration log .
Notes:
-
Use AquaManager to view and save calibration data on a PC. In addition to
the calibration log information listed above, AquaManager calibration logs
also include user inputs 1 and 2.
-
Information from cancelled calibrations is not stored.
DO
Menus → Calibration→ DO
Directions to Calibrate DO Sensor %Sat
1.
If you have not already done so, locate and install the sensor if using a
YSI 5422, see probe installation instructions included with the sensor.
2.
Next, install a new membrane, or sensor cap, if necessary. See instruc-
tions included with membrane kit.
3.
Verify that the sensor type and membrane type are configured correctly
5400
in the DO Sensor Setup menu at the 5X00.
4.
Read Getting Ready to Calibrate - page 82.
5.
Verify that the configured salinity (ppt) value in the DO Sensor Setup
menu is correct. The entered salinity value should equal the salinity of
the water being monitored (not the calibration solution). If necessary,
enter the correct the salinity value (ppt).
Menus → Sensor Setup→ DO→ppt
Configuring the 5X00
YSI 5X00
83
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Troubleshooting
