User manual EUTECH INSTRUMENTS DO 6 PLUS

[. . . ] Instruction Manual DO 6+ Dissolved Oxygen/Temp 68X243634 Rev 0 Mar 09 Technology Made Easy . . . Part of Thermo Fisher Scientific Instruction Manual DO 6+ Instruction Manual DO 6+ Preface This manual serves to explain the use of the DO 6+ hand held meter. This manual functions in two ways: first as a step by step guide to help you operate the meter; second, as a handy reference guide. This manual is written to cover as many anticipated applications of the DO 6+ meter as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor. [. . . ] Press CAL to return to measurement mode. ppm mg/l 2) 3) 4) 5. 4 Calibration Data (CAL. 2) To view the % saturation or mg/L (ppm) concentration calibration data, proceed from the corresponding setup menu. 1) 2) 3) 4) From the setup menu, press to select "CAL. 2" for the most recent calibration data. Press CAL to return to measurement mode. % Display will show the latest % saturation calibration if set up menu is selected from the DO % Saturation Mode HOLD ENTER CAL Note: " -- -- -- -- " indicates no calibration data exists for the selected mode. CAL mg/l Display will show the latest mg/l or ppm calibration if set up menu is selected from the DO mg/l (ppm) Concentration Mode - 22 - Instruction Manual DO 6+ 5. 5 Electrode Data (ELE. 3) Use this menu to view electrode data for diagnostic purposes. Data includes; slope factor (FACT), % saturation offset (OFS), 100% saturation mV value (HI. mV), and 0% saturation mV value (LO. mV). To view electrode data for % saturation or mg/L (ppm) modes, enter from the corresponding setup menu. The electrode slope factor gives an indication of the probe's efficiency. It is the ratio of the actual mV produced by the probe to the theoretical mV value. The % saturation offset allows you to view the electrode offset adjustment made in Section 5. 8 -- % Saturation Offset Adjustment. "FACT" is momentarily shown before displaying the slope factor. "OFS" is momentarily shown before displaying % saturation offset. Note: this is not available from the mg/L (ppm) concentration setup menu. "HI. mV" is momentarily shown before displaying the electrodes mV output at 100%. "LO. mV" is momentarily shown before displaying the electrodes mV output at 0%. 4) 5) Press CAL to exit the setup mode and return to measurement mode at any time. - 23 - Instruction Manual DO 6+ HOLD ENT ER "FACT" displays for 1. 5 seconds Viewing of the offset percentage adjustment will be available only if set up menu is selected from the DO % Saturation or the Temperature Mode. Otherwise, this menu will be skipped. HOLD ENT ER "OFS" displays for 1. 5 seconds % "HI. mV" displays for 1. 5 seconds HOLD ENT ER HOLD ENT ER "LO. mV" displays for 1. 5 seconds 5. 6 Automatic Shut Off (AtO. 4) Use this feature to conserve batteries. When active, the meter will automatically shut off 20 minutes after the last key press. 1) 2) 3) 4) 5) From the setup menu, press to select "AtO. 4". Use to select YES (activate automatic off) or NO (activate automatic off). Press CAL to return to measurement mode. HOLD ENTER - 24 - Instruction Manual DO 6+ 5. 7 Reset to Factory Default (rSt. 5) Use this mode to reset the meter to factory default settings. User (b. USR) resets all data, calibration, and other customized setup functions. 1) 2) 3) 4) 5) From the setup menu, press to select "rSt. 5". Use to select YES (reset calibration) or NO (do not reset calibration). If "YES", the meter returns to measurement mode after resetting. [. . . ] By consulting solubility tables for oxygen at the particular barometric pressure and salinity of the water being measured, the corresponding concentration (mg/L or ppm) can be found for air saturated water at the air calibration temperature, and the meter can be set accordingly. Because most meters are temperature compensated, they will still give correct readings in mg/L even though the actual water temperature may be different to the air calibration temperature. Note: The closer the air calibration temperature is to the water temperature, the more accurate the calibration. Applications Oxygen is essential for fish, invertebrate, plant, and aerobic bacteria respiration. Fish growth and activity usually require 5 to 6 ppm of DO, an important consideration for Aqua-culture industry. [. . . ]