Orion Dual Star pH/ise dual Channel Benchtop Meter User Manual
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- Bu səhifədəki naviqasiya:
- and Measurement
- RmV Calibration Hints
- RmV Calibration Procedure Note
- Important Note
- RmV Measurement Procedure
Calibration and Measurement |
Section 4 ISE Measurement Procedure 1. Rinse the ISE electrode (ATC probe, stirrer probe and reference electrode, if applicable) with distilled water and place the electrode(s) into the sample. 2. If the stirrer probe is in use, press the stirrer key to turn on the stirrer probe. Press the ▲ / ▼ keys to adjust the speed of the stirrer probe. 3. Wait for the measurement to stabilize and record the concentration and temperature of the sample when the meter indicates that the measurement is stable. The read type selected in the EZ Startup menu or setup menu will determine how the ISE measurements are displayed by the meter. The available read types are Auto-Read, on ready, at time intervals, continuous, value change in measurement and timed reading. To review or change the available read type, refer to the Setup Menu section. 4. If the stirrer probe is in use, press the stirrer key to turn off the stirrer probe. 5. Remove the electrode(s) from the sample, rinse with distilled water, blot dry, place the electrode(s) into the next sample. 6. Repeat steps 2 through 5 for all of the samples. 7. When all of the samples have been measured, store the electrode(s) according to the instructions in the electrode user guides.
Thermo Scientific Orion Dual Star pH/ISE Benchtop Meter User Manual |
39 Section 4 |
Calibration and Measurement mV Measurement and RmV and ORP Calibration and Measurement
Measure the raw millivolt (mV) values of an ORP, ISE or pH electrode in the mV mode. Oxidation-reduction potential (ORP) measurements are commonly reported as raw millivolts. The mV readings of an ISE electrode in standards can be used to draw a calibration curve on semi-logarithmic graph paper, which can be helpful for low level ISE measurements in the non- linear range of the electrode. The millivolt readings of a pH electrode can be used to troubleshoot the electrode and verify it is reading the correct mV range of common pH buffers. 1. Set the measurement mode to mV in the setup menu. Prepare the electrode according to the instructions in the electrode user guide. Ensure that the electrode, ATC probe and reference electrode (if applicable) are connected to the meter inputs that correspond with the channel that will be measured. 2. Rinse the electrode (ATC probe, stirrer probe and reference electrode, if applicable) with distilled water, blot dry with a lint-free tissue and place the electrode(s) into the sample. 3. If the stirrer probe is in use, press the stirrer key to turn on the stirrer probe. 4. Wait for the measurement to stabilize and record the mV and temperature of the sample when the meter indicates that the measurement is stable. The read type selected in the EZ Startup menu or setup menu will determine how the mV measurements are displayed by the meter. The available read types are Auto-Read, on ready, at time intervals, continuous, value change in measurement and timed reading. To review or change the available read type, refer to the Setup Menu section. 5. If the stirrer probe is in use, press the stirrer key to turn off the stirrer probe. 6. Remove the electrode(s) from the sample. 7. Repeat steps 2 through 6 for all of the samples. 8. When all of the samples have been measured, store the electrode(s) according to the instructions in the electrode user guides.
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Orion Dual Star pH/ISE Benchtop Meter User Manual Thermo Scientific Calibration and Measurement |
Section 4 Thermo Scientific Orion Dual Star pH/ISE Benchtop Meter User Manual |
41 RmV Calibration Hints • The measurement mode (displayed to the right of the measurement value) determines the type of calibration that the meter will perform. Set the measurement mode to RmV for the channel that will be calibrated. Refer to the Setup Menu section for instructions on setting the measurement mode. • Prepare and condition the electrode per the instructions in the electrode user guide. • Ensure that the electrode, ATC probe and reference electrode (if applicable) are connected to the meter inputs that correspond with the channel that will be calibrated. • Always use a freshly prepared standard for calibration. Allow the standard and samples to reach the same temperature for precise measurements.
Note: In most calibration screens, press the f1 (escape) key to return to the measurement mode without saving the calibration. 1. In the measurement mode, press the cal key. 2. Dual channel display only: Press the ▲ / ▼ keys to select the channel to be calibrated and press the f2 (accept) key. 3. Rinse the electrode (ATC probe, stirrer probe and reference electrode, if applicable) with distilled water, blot dry with a lint-free tissue and place the electrode(s) into the standard. 4. When the electrode(s) and standard are ready, press the f3 (start) key. 5. Wait for the value to stabilize and the meter to display ready next to the raw mV value. The raw mV value is the actual mV reading of the electrode. To enter a relative mV value, use the numeric keypad, decimal key and +/- key to enter the mV value of the standard. Press the f3 (clear) key to delete any digits. Once the value is correct, press the f2 (accept) key. 6. The meter will display the mV offset. Perform one of the following actions:
calibration. Only pressing the f3 (cal done) key without pressing the f2 (log/print) key will not save the calibration. a. Press the f2 (log/print) key to save and end the calibration, export the calibration data to the calibration log and export the calibration data to a printer or computer, if a printer or computer is connected to the meter and enabled in the setup menu. The meter will automatically proceed to the measurement mode. b. Press the f1 (escape) key to return to the measurement mode without saving the calibration. 7. Proceed to the RmV Measurement Procedure section. Yüklə 0,73 Mb. Dostları ilə paylaş:
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