Thermo Fisher Scientific CyberScan PD 300 - Manual (Page 28)

Instruction Manual PD 300
5.3 Taking Pressure/Salinity Compensated DO measurements
If necessary, you can adjust the pressure and salinity values of your measurements in the
SETUP mode. The DO meter will automatically compensate for salinity and pressure based on
the values entered in the SETUP functions. The meter is factory set at 760 mm Hg (101.3
Pascals) pressure adjustment and a factor of 0.0 ppt salinity adjustment. See Addendum 2 on
page 67 for a “Pressure vs Altitude” table.
Pressure Adjustment
NOTE
This mode appears in both the % saturation and mg/L (ppm) measurement modes.
1. While in the measurement mode, press “Mode” key if necessary to enter DO
measurement mode.
2. Press the SETUP key to enter SETUP mode.
3. The upper display shows “dPr”.
4. Press the ENTER key until the upper display shows a number and the lower display
shows “Hg” or “PA”.
5. Use the ▲ or ▼keys to enter the barometric pressure. The upper display will show the
value you have entered.
6. Press ENTER to confirm pressure value.
7. Press CAL/MEAS to return to Measurement mode, or continue with step 4 on page 39 to
make a salinity adjustment [available in mg/L (ppm) mode only].
8. See section 8.6.1 - “P1.1 Pressure adjustment mode” on page 37.
Salinity Adjustment
NOTE
This mode appears in ppm (mg/L) measurement mode only.
1. Press the MODE key to select mg/L (ppm) mode.
2. Press the SETUP key to enter SETUP mode.
3. The upper display shows “dPr”.
4. Press the ENTER key until the upper display shows a number and the lower display
shows “SAL”.
5. Use the ▲ or ▼ keys to enter the salinity of your solution in parts per thousand. Note
1000 ppm = 1 ppt. The upper display will show the value you have entered.
6. Press ENTER key to confirm value.
7. Press CAL/MEAS to return to Measurement mode.
8. See section 8.6.2 - P1.2: Salinity Adjustment Mode on page 39.
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