HF scientific Oil Content Monitor - Manual (Page 17)

OCM Rev. 3.9 (1/03) 11
7.0 Calibration Procedures
The OCM has been factory-calibrated at HF scientific, inc.. It is possible to use the
instrument directly out of the box. However, re-calibration of the instrument using oil-
free water and the supplied 15 PPM calibration standard is recommended to allow the
user to become familiar with the operation of the instrument and the calibration
procedures
7.1 Standard Calibration Procedure
Two calibration points are required for complete calibration of the OCM; oil-free water,
and a 15 PPM calibration standard (available only from HF scientific, inc.). To ensure
the accuracy of the instrument, please follow the instructions detailed in the following
section.
7.1.1 Clear Water (0 PPM) Calibration
1. Shut off flow to the OCM.
2. Disconnect the source tubing.
3. Remove the cleanout plug on the OCM.
4. Open the drain valve to remove the seawater from the sample tube.
5. Close the drain.
6. Pour enough oil-free water in to the sample tube to fill it. De-ionized or
distilled water is recommended.
7. Open the drain.
8. Repeat steps 5 and 6 and then clean the sample tube using the cleaning brush
supplied with the instrument.
9. Open the drain.
10. Repeat steps 8 and 9 two more times to completely clean the sample tube.
11. Close the drain and fill the sample tube with the oil-free water.
12. Replace cleanout plug.
13. Press the MODE key three times to enter the calibration mode. The “CAL”
block will be illuminated and the display will read ”0 PPM” (see diagram).
14. Press the
↵ ↵↵ ↵
key to initiate the calibration on 0 PPM water. The word CAL
will appear on the upper row of the display and the word NO will appear on