-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
-
Cosmetic Ingredient
- Water Treatment Chemical
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
About the use of turbidimeters Turbidity, that is, the degree of turbidity of water, is caused by the presence of trace insoluble suspended substances and colloidal substances in the water.
The measurement unit used in the ISO standard is FTU (turbidity unit), FTU and NTU (turbidity unit) unit of measurement)
.
Turbidity meter is based on this principle to measure the turbidity of water
.
So what should you pay attention to in the calibration of your turbidimeter? 1.
The pre-calibration of the turbidimeter not only requires the operator to have good operating ability and strict requirements for the accurate detection of the turbidimeter, but also requires accurate calibration steps and methods to ensure that the turbidity instrument is accurately calibrated, which is convenient for later inspections.
sequence use and testing
.
2.
The preparation of zero-turbidity water requires self-preparation of zero-turbidity water.
For the configuration of zero-turbidity water, it is necessary to filter distilled water with a microporous membrane with a pore size of less than 0.
2 µm.
It is necessary to maintain the filtration operation for 2 times before the test can be used.
The filtrate, even deionized pure water, is referred to as zero turbidity water used for calibration
.
Operators need to pay attention that the initial filtrate needs to be discarded at 200 ml to clean the turbidity bottle
.
3.
Preparation of calibration solution We can use the national standard as a reference, generally choose the standard solution of formazin, and its standard value is set to 400NTU
.
Formazin standards were diluted with available zero turbidity water to obtain a calibration concentration series
.
Usually, the calibration is performed according to the calibration point given by the instrument, which is generally a gradient.
For example, the concentration of the calibration series is 0, 2, 20, 100, 400, 1000, and the concentration is placed in order, and press the CAL calibration key.
It should be noted that the instrument comes with The concentration in the calibration bottle is not necessarily accurate, it can be reconfigured in time, but the basic accessories above 400 are relatively accurate
.
Only one can generally be calibrated for two concentrations of 0 and 20 NTU
.
Repeatedly adjust the knob until both calibration points are calibrated and can be measured
.
4.
Calibration process We take the JK type produced by Huaian Jiake Automation Instrument as a sample to briefly describe its calibration process
.
(1) The instrument needs to press the setting key twice in the measurement state to enter the CSI range calibration state
.
Zero adjustment: when the sample bottle is filled with zero turbidity water that meets the requirements, and wait for its display value to remain stable, press the zero adjustment key immediately, and the display value is 0.
00NTU
.
Calibration: You need to put 10 NTU standard solution in the test bottle, and then press the key to input the standard value, wait for the display to stabilize, and press the calibration key immediately to make the instrument display 10 NTU
.
Once you press the save and print keys, it will exit the setting state and immediately enter the measurement state
.
(2) In the measurement state, the operator needs to press the setting key again to prompt the interface to enter the CS2 range calibration state
.
Zero adjustment: the same as above, after the sample bottle is filled with zero turbidity water that meets the requirements and waits for the displayed value to become stable, press the zero adjustment key to ensure that the displayed value is 0NTU
.
Calibration is first and foremost
.
When the sample bottle is filled with 10NTU standard solution, press the key to input the standard value, wait for the displayed value to stabilize, and press the calibration key to ensure that the instrument displays 10NTU
.
Calibrate the second point
.
At this time, the sample bottle is filled with 100NTU standard solution, and then press the key to input the standard value of 100.
After the displayed value is stable, press the calibration key to ensure that the instrument displays 100NTU
.
Same as above, press the store and print keys to exit the setting state and enter the measurement state
.
The above is a kind of calibration of push-button turbidity.
The knob-type calibration adjusts the knob repeatedly until the two calibration points, 0 and 20NTU, are calibrated and can be measured
.
The above is the relevant introduction about the use of turbidimeters.
Different types of turbidimeters need to be calibrated according to the instructions.
After calibration, subsequent accurate detection can be made
.
Otherwise, the error will be larger at low concentration
.
The measurement unit used in the ISO standard is FTU (turbidity unit), FTU and NTU (turbidity unit) unit of measurement)
.
Turbidity meter is based on this principle to measure the turbidity of water
.
So what should you pay attention to in the calibration of your turbidimeter? 1.
The pre-calibration of the turbidimeter not only requires the operator to have good operating ability and strict requirements for the accurate detection of the turbidimeter, but also requires accurate calibration steps and methods to ensure that the turbidity instrument is accurately calibrated, which is convenient for later inspections.
sequence use and testing
.
2.
The preparation of zero-turbidity water requires self-preparation of zero-turbidity water.
For the configuration of zero-turbidity water, it is necessary to filter distilled water with a microporous membrane with a pore size of less than 0.
2 µm.
It is necessary to maintain the filtration operation for 2 times before the test can be used.
The filtrate, even deionized pure water, is referred to as zero turbidity water used for calibration
.
Operators need to pay attention that the initial filtrate needs to be discarded at 200 ml to clean the turbidity bottle
.
3.
Preparation of calibration solution We can use the national standard as a reference, generally choose the standard solution of formazin, and its standard value is set to 400NTU
.
Formazin standards were diluted with available zero turbidity water to obtain a calibration concentration series
.
Usually, the calibration is performed according to the calibration point given by the instrument, which is generally a gradient.
For example, the concentration of the calibration series is 0, 2, 20, 100, 400, 1000, and the concentration is placed in order, and press the CAL calibration key.
It should be noted that the instrument comes with The concentration in the calibration bottle is not necessarily accurate, it can be reconfigured in time, but the basic accessories above 400 are relatively accurate
.
Only one can generally be calibrated for two concentrations of 0 and 20 NTU
.
Repeatedly adjust the knob until both calibration points are calibrated and can be measured
.
4.
Calibration process We take the JK type produced by Huaian Jiake Automation Instrument as a sample to briefly describe its calibration process
.
(1) The instrument needs to press the setting key twice in the measurement state to enter the CSI range calibration state
.
Zero adjustment: when the sample bottle is filled with zero turbidity water that meets the requirements, and wait for its display value to remain stable, press the zero adjustment key immediately, and the display value is 0.
00NTU
.
Calibration: You need to put 10 NTU standard solution in the test bottle, and then press the key to input the standard value, wait for the display to stabilize, and press the calibration key immediately to make the instrument display 10 NTU
.
Once you press the save and print keys, it will exit the setting state and immediately enter the measurement state
.
(2) In the measurement state, the operator needs to press the setting key again to prompt the interface to enter the CS2 range calibration state
.
Zero adjustment: the same as above, after the sample bottle is filled with zero turbidity water that meets the requirements and waits for the displayed value to become stable, press the zero adjustment key to ensure that the displayed value is 0NTU
.
Calibration is first and foremost
.
When the sample bottle is filled with 10NTU standard solution, press the key to input the standard value, wait for the displayed value to stabilize, and press the calibration key to ensure that the instrument displays 10NTU
.
Calibrate the second point
.
At this time, the sample bottle is filled with 100NTU standard solution, and then press the key to input the standard value of 100.
After the displayed value is stable, press the calibration key to ensure that the instrument displays 100NTU
.
Same as above, press the store and print keys to exit the setting state and enter the measurement state
.
The above is a kind of calibration of push-button turbidity.
The knob-type calibration adjusts the knob repeatedly until the two calibration points, 0 and 20NTU, are calibrated and can be measured
.
The above is the relevant introduction about the use of turbidimeters.
Different types of turbidimeters need to be calibrated according to the instructions.
After calibration, subsequent accurate detection can be made
.
Otherwise, the error will be larger at low concentration
.
