Validation/Calibration Of The Turbidity Module - Maritime G6100 Operation Manual

Validation & Calibration
buffer. Stir the sensor around the bag and wait a few seconds for a stable reading. Make
sure there is enough pH buffer to cover the tip of the electrode.
6. If the reading is within ± 0.2 of the pH buffer, the validation with pH is successful.
When the validations are completed, go to step 14.
7. If the reading is not within ± 0.2 of the pH buffer, the module must be calibrated.
8. Calibration procedure: set the rotary switch from position M to the position that
matches the used pH buffer. Wait for the red light to flash three times, then place the
sensor in the pH buffer.
9. Stir the sensor around and wait for a stable reading. Make sure there is enough pH buffer
to cover the tip of the electrode.
10. The calibration may take several minutes to complete. When the calibration is
successful, the red-light will flash twice.
11. The calibration procedure is finished once calibration has been carried out for all three
pH buffers.
12. Repeat step 5 & 6.
13. Set VALVE 1 to STOP
14. Pour some water into the measuring chamber to keep the electrode moist.
15. Put the sensor back to the measuring chamber and fasten the union.

6.2 Validation/Calibration of the Turbidity Module

Steps 1-8 and 25 describe the procedure to perform a validation of the Turbidity module.
Steps 9-24 describe the procedure to perform a local calibration of the Turbidity module.
1. Place a cup under the calibration fluid drain off to collect the discharge.
2. VALVE 3 is in STOP position and VALVE 2 to DRAIN position for WM units.
For WMRTU units, close the ball valve & turn the internal valve to Drain.
3. Loosen the union nut on the top and park the wiper unit in the clamp.
4. Observe the fluid draining off into the cup. Flush the measuring chamber with water
until all the dirt and sand are cleaned out. Clean the measuring chamber with a cleaning
pad, then turn VALVE 2 to STOP.
Note: turn counterclockwise to avoid sampling water to enter the system (do not go past
RUN.
5. Pour Standard 0.0 NTU into the chamber until the lenses are covered. DO NOT FILL
COMPLETELY.
6. Refit the wiper unit loosely. Observe the displayed value at the Turbidity analyzer.
7. If the displayed value is near 0.0 NTU (i.e. +/- max.2 NTU), the validation at Zero point
is successful. Please repeat steps 2-7 but use standard 40 NTU and then 10 NTU to
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