User manual EUTECH INSTRUMENTS WATERPROOF PHSCAN 2 PH TESTER

[. . . ] If there are doubts in the use of the meter, please do not hesitate to contact the nearest Authorised Distributor. Eutech Instruments/ Oakton Instruments cannot accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument. The information presented in this manual is subjected to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd/ Oakton Instruments. Copyright © 2000. Eutech Instruments Pte Ltd/ Oakton Instruments All rights reserved. [. . . ] This mode lets you perform two functions: Select either mm Hg or Kilo Pascal barometric pressure units. See page 50 for a "Pressure vs Altitude" table. Press the SETUP key to enter SETUP mode. Press MI/ or MR/ keys to scroll through main groups until you view parameter "dPr" in the upper display. The upper display shows either "Hg" (mm Hg) or `PA" (Kilo Pascal) and the lower display shows "bAr". Press MI/ or MR/ keys to toggle between mm Hg and Pascal units. 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). 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. 21 Instruction Manual DO 300 Figure 18: Change pressure units (mm Hg or kPa) & adjusting its values 22 Instruction Manual DO 300 8. 3. 2 Salinity Adjustment Mode NOTE: This mode appears only from mg/L (ppm) SETUP mode . Salinity correction mode lets you correct for the variations in oxygen solubility due to salt concentration in the sample. Press the ENTER key to move back to main group "CAL". If you want to return to measurement mode, press CAL/MEAS. Figure 21: View calibration data or MR/ keys to scroll through main groups until you view parameter "CAL" in the upper NOTE: If you did not calibrate this meter in a particular mode, the screen will show " ---". See Figure 22. (The values shown above are for illustration purpose. Your meter may display different values depending on the settings & your environmental conditions) Figure 22: Meter is not calibrated 25 Instruction Manual DO 300 8. 6 ELE: Electrode Properties Checking electrode data from % saturation SETUP mode These "view only" parameters show you the electrode properties for diagnostic purposes: A. Probe Slope: Lets you view and give an indication of the probe's efficiency. The value displayed is the ratio of the theoretical value to the actual value produced by the probe. The higher the number, the lesser output from the probe. % Saturation Offset: (available in % saturation SETUP mode only): Lets you see the value of the % saturation offset entered in parameter "OFS" (see page 24 for instructions). 100% Saturation mV value: Lets you view the sensor's mV output corresponding to 100% saturation. 0% Saturation mV Value: Lets you view the sensor's millivolt output corresponding to 0% saturation. SETUP ee l p 50 . ER ENT SETUP K= . 4 98 e1 l % ER ENT SETUP 76 . From measurement mode: 1. Press the MODE key to select the measurement mode for the electrode properties you want to view: % or mg/L (ppm). SETUP ER ENT % EL 2 2. [. . . ] 35641-00 35640-01 35640-50 35640-52 35640-54 35615-56 35632-98 35640-72 35640-74 35640-75 35640-79 35640-60 35640-80 Calibration Solutions Item Oakton Instruments Ordering Code. Zero oxygen solution, 500 mL Premixed electrolyte solution, 500 mL Electrolyte power (58. 5 g) 00653-00 35640-71 35640-70 48 Instruction Manual DO 300 14 DISSOLVED OXYGEN & METER THEORY Dissolved Oxygen (DO) refers to the volume of oxygen that is contained in water. There are two main sources of DO in water: from atmosphere and photosynthesis. Waves and tumbling water mix air into the water where oxygen readily dissolves until saturation occurs. [. . . ]