The solution comprises pH 4 and 1M KCl (in equal amounts)

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To read heart rate measurements TriLog must be connected to the computer and to work with MultiLab. The sampling rate should be 10/s or higher (for best results use rate of 20/s).
You can also take heart rate measurements disconnected from the computer. Then download the data to MultiLab.

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We recommend sampling rate of '‘every second' or less but it will work well with every rate.

To calibrate the sensor:
Setup TriLog

1. Turn on TriLog

2. Connect Temperature sensor into input 1 (I/O-1) of TriLog

3. Connect the Dissolved Oxygen electrode to the Dissolved Oxygen adaptor, then plug the Dissolved Oxygen sensor into input 2 (I/O-2) of TriLog

4. Set TriLog to record at a rate of every second

5. Leave the Dissolved Oxygen sensor connected to TriLog for at least 10 minutes in order to stabilized

Measure the temperature
Start logging. Wait for stable temperature reading. Record the temperature

Find the saturation level
Find the correct saturation level for this temperature in the DO solubility table (see Table 1 below)

Table 1: DO solubility table

Calibrate

1. Push RUN on TriLog's keypad to begin recording

2. Turn the calibration knob on the Dissolved Oxygen adaptor until the display will show the desired saturation level

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Oxygen
How do I use the oxygen sensor to measure oxygen level in the air?

You need to switch TriLog to 8 inputs mode and select the sensor type manually. Oxygen level in the air will be displayed as: O2 25%

To switch to 8 inputs mode:

With MultiLab:

1. Connect TriLog to the PC

2. Click Logger on the menu button, then click Auto ID

To switch to 8 inputs click Logger on the menu bar then click Auto ID a second time to uncheck the Auto ID option.
If the sensor doesn’t support auto ID, you can still work with it providing that the sensor’s output is 0 to 5V and linear. To do that you will have first to define it with MultiLab. See TriLog User Guide for instructions.

With ImagiProbe:
To activate the Auto ID function, from the Investigation or Trial form:

1. Tap the Menu icon to display the ImagiProbe 3.0 menus

2. Tap the Options menu

3. Select Auto ID Sensors

4. To disable TriLog's Auto ID mode tap the Off button.

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The DT095 ships calibrated. For more accurate measurements however, we recommend that you recalibrate every time you perform a new turbidity experiment.

1. Connect the Turbidity sensor to input 1 on the TriLog

2. Switch the TriLog to the 8 sensors mode (Same as question 4)

3. manually select Voltage 0-5V in Input 1

First calibrating point:

1. Prepare a blank by rinsing the empty cuvette with distilled water, then fill it to the marked line with distilled water

2. Close the cuvette with the cup. Gently wipe the outside with a soft, lint-free cloth or tissue

3. Holding the cuvette by the cup, place it into the slot of the Turbidity Sensor and close the lid

4. Start recording and measure the output voltage. This value corresponds to zero NTU

Second calibrating point:

1. Obtain the cuvette containing the Turbidity Standard (100 NTU)and gently invert it four times in order to mix in any particles that may have settled to the bottom

2. NOTE: Do not shake the standard as this will introduce tiny air bubbles that will affect turbidity readings

3. Gently wipe the outside of the cuvette with a soft, lint-free cloth or tissue

4. Holding the cuvette by the cup, place it into the slot of the Turbidity Sensor and close the lid

5. Start recording and measure the output voltage. This value corresponds to 100 NTU

Entering the calibration values:

1. Click Logger on the menu bar and then click Define new sensors

2. Select the Turbidity sensor* . Enter "0" and "100" in the real value boxes and the measured output voltages in the output voltage boxes

3. Click OK

The Turbidity sensor is now calibrated and you can switch back to Auto ID mode and begin recording.

 

*If Turbidity is not on the list, click Add new sensor, enter Turbidity in the Sensor name box and NTU in the Sensor unit box, and then proceed as above

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