Thermo Fisher Scientific CyberScan DO 300 - Manual (Page 24)

Instruction Manual DO 300
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8.3 dPr: Dissolved Oxygen Parameters
This parameter lets you adjust the barometric pressure and salinity.
8.3.1 Pressure adjustment mode
Barometric pressure is vital to correct dissolved oxygen measurements. You need to enter the
correct barometric pressure of the area where you are performing your DO measurement. This
mode lets you perform two functions:
Select either mm Hg or Kilo Pascal barometric pressure units.
Adjust the barometric pressure. See page 50 for a “Pressure vs Altitude” table.
From measurement mode:
1. Press the SETUP key to enter SETUP mode.
2. Press MI/ or MR/ keys to scroll through main groups until you view parameter “dPr”
in the upper display.
3. Press the ENTER key twice. The upper display shows either “Hg” (mm Hg) or ‘PA” (Kilo
Pascal) and the lower display shows “bAr”. See Figure 18 on page 22.
4. Press MI/ or MR/ keys to toggle between mm Hg and Pascal units.
5. Press the ENTER key to confirm selection and move to the next screen. The upper
display shows the barometric pressure and the lower display shows the selected unit.
6. Press MI/ or MR/ keys to adjust the barometric pressure. The pressure adjustment
range is 500 to 1499 mm Hg (66.6 to 199.9 kPa).
7. Press the ENTER key to confirm selection and move to Step 5 on page 23 for salinity
adjustment (appears only from mg/L (ppm) SETUP mode). If instead you want to return
to measurement mode, press CAL/MEAS twice.