YSI 5500D-1 - Manual (Page 43)

YSI 5X00
85
YSI 5X00
84
Figure 4.7
Notes:
- A sensor must be enabled in order to calibrate.
- For YSI 5422 and YSI 626250 cable/probe assemblies, keep the sensor guard
installed during the calibration to protect the membrane from possible physical
damage - figures 4.5 and 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.
Configuring the 5X00
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
in the DO Sensor Setup menu at the 5X00.
4. Read Getting Ready to Calibrate - page 83.
5. If using the 5422 polarographic sensor, wait at least 10-15 minutes after
the 5400 is powered on, or after the DO sensor is serviced, before cali-
brating. This allows enough time for the DO sensor to stabilize.
6. 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
7. Verify that the local elevation in the DO Sensor Setup menu is correct.
If necessary, enter the correct elevation.
Menus → Sensor Setup→ DO→Elevation
8. Create a 100% water-saturated air environment for the DO sensor:
For a YSI 5422 polarographic sensor & YSI 626250 ODO sensor:
9. Moisten the sponge and place in the bottom of the gray calibration/
storage sleeve with a small amount of clean water. Do not use too much
water! The idea is to create a 100% humid environment. (The storage
sleeve ensures venting to the atmosphere.)
10. With the sensor guard installed, place the cal/storage sleeve over the
sensor guard. Make sure that the DO sensor is not immersed in water
and that there are no water droplets on the membrane or sensor cap.
For a YSI 5520 and 5521 galvanic sensor, there are two options for
the %Sat calibration environment:
11. Calibrate the galvanic sensor in air by exposing it to air and removing
any water droplets from the membrane with a lint free cloth - figure
4.6, page 83.
12. If the temperature source for the DO sensor being calibrated is not com-
ing from a temperature sensor located on the DO sensor’s probe assembly,
make sure that the temperature value being reported by the source is
equivalent to the temperature at the DO sensor’s calibration location.
Menus → Sensor Setup→ DO→Temp Source (User Defined)
5400
5400
5400
Configuring the 5X00