Ysi Pro2030 User Manual download pdf (Page 16)

up the value of the solution at the current temperature and enter that

value into the Pro2030. Most conductivity solutions are labeled with a

value at 25°C. If calibrating specific conductance, enter the value listed

for 25°C. Depressing either the up or down arrow key for 5 seconds

will move the changing digit one place to the left. The Pro2030 will

remember the entered calibration value and display it the next time a

conductivity calibration is performed.

Press enter to complete the calibration. Or, press Cal to cancel the 4.

calibration and return to the Run screen.

‘Calibration Successful’ will display for a few seconds to indicate a 5.

successful calibration and then the instrument will return to the Run

screen.

If the calibration is unsuccessful, an error message will display on the 6.

screen. Press the Cal key to exit the calibration error message and

return to the Run screen. See the Troubleshooting guide for possible

solutions.

CALIBRATING IN SALINITY

Fill a clean container (i.e. plastic cup or glass beaker) with fresh, traceable 1.

salinity calibration solution and place the sensor into the solution.

The solution must cover the holes of the conductivity sensor that are

closest to the cable (figure 8). Ensure the entire conductivity sensor is

submerged in the solution or the instrument will read approximately

half the expected value. Gently move the probe up and down to remove

any air bubbles from the conductivity sensor.

Turn the instrument on and allow the conductivity and temperature 2.

readings to stabilize. Press the Cal key. Highlight Conductivity and

press enter. Next, highlight Salinity and press enter.

Use the up or down arrow key to adjust the value on the display to 3.

match the value of the salinity solution. Depressing either the up or

down arrow key for 5 seconds will move the changing digit one place to

the left. The Pro2030 will remember the entered calibration value and

display it the next time a salinity calibration is performed.

Press enter to complete the calibration. Or, press Cal to cancel the 4.

calibration and return to the Run screen.

‘Calibration Successful’ will display for a few seconds to indicate a 5.

successful calibration and then the instrument will return to the Run

screen.

If the calibration is unsuccessful, an error message will display on the 6.

screen. Press the Cal key to exit the calibration error message and

return to the Run screen. See the Troubleshooting guide for possible

solutions.

TAKING MEASUREMENTS

Before taking measurements, be sure the instrument has been calibrated

to ensure the most accurate readings. Turn the instrument on and wait 5-15

minutes if using a polarographic sensor. Install the sensor guard to protect the

sensor and membrane. Place the probe in the sample to be measured and give the

probe a quick shake to release any air bubbles. Be sure the conductivity sensor

is completely submerged in the sample. The two holes near the cable should be

covered by the sample for accurate conductivity readings (figure 8).

Allow the temperature readings to stabilize. Next, stir the probe in the sample to

overcome the stirring dependence of the dissolved oxygen sensor. The dissolved

oxygen sensor requires at least 6 inches (16 cm) per second of water movement

if using the yellow membrane and 3 inches (7.62 cm) per second of water

movement if using the blue membrane. The required sample movement can be

achieved by the natural flow of the stream, physically stirring the probe in the

sample or a combination of the two. Once the values plateau and stabilize you

may record the measurement and/or store the data set. The dissolved oxygen

reading will drop over time if stirring or movement is ceased. If placing the DO

sensor into a stream or fast flowing waters it is best to place it perpendicular to

the flow and not facing into the flow.

If using the DO sensor near an aeration device, it is helpful to make sure air

bubbles do not burst on the membrane since that may cause unstable DO

readings. You should be able to prevent this by pointing the sensor upwards so

it’s facing the sky and twist tying, zip tying or rubber banding the bulkhead to

the cable. Essentially, making a simple curve to the cable without bending or

breaking the cable will allow you to lower the sensor into the aerated sample

while the sensor points skyward and air bubbles are no longer bursting on the

membrane surface.

SAVING AND VIEWING DATA

The Pro2030 can store 50 data sets in non-volatile memory for later viewing. A

data set includes the values currently on the display, i.e. temperature, dissolved

oxygen and two conductivity parameters. Each data point is referenced with a

data set number, 01 through 50.

SAVING DATA

The Pro2030 can not communicate to a PC via a Pro Series

communications saddle. Connecting the Pro2030 to a communication

saddle may cause erratic instrument behavior.

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Ysi Pro2030 User Manual Page 16

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