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'Product parameters'

Product Name: TDS-3 key water quality test pen

Measuring range: 1-9990 PPM, more than 999PPM automatic * 10

Temperature test range: 0-80 °

Battery: 1.5V * 2 (button battery)

Battery life: about 1000 hours

Error range: ± 2%

Product size: 15.5 * 3.1 * 2.3 (cm)

'Features of this product'

1. Can lock detection data;
2 can automatically shut down;
6. The unique temperature compensation function, can be automatically converted into 25 degrees Celsius water temperature TDS value;
7. Large-screen liquid crystal display waterproof design, easy to watch durable;
8. Long use time Do not replace the battery frequently, normally can be used for two years.
'product manual'
1 / Take down the pen cover and turn on the ON / OFF switch.
2 / Insert the pen into the test solution to the water level line, gently agitate to remove the bubbles in the pen;

3 Press the HOLD key to read the value. If the display flashes, the X10 pattern reading should be read X10.
4 / After use, wipe the pen on the water, cover the pen can be back.
5 / Caution: Avoid soaking the TDS pen in the water, avoid direct light and high temperature, avoid the impact of heavy pressure and drop can not be tested more than 80 ° hot water

'Temperature Test Description'

1. When the test pen is turned on, the temperature test function can be used in the solution or at any time in the air;

2. Press TEMP key, the display will be converted to temperature display;

3. Continue pressing the Temperature key to switch to TDS mode.

'Introduction to TDS'

TDS is the abbreviation of English total dissolved solids, the Chinese translation of the total dissolved solids, measured in units of mg / L (mg / L), which indicates that 1 liter of water which contains dissolved solids of the amount of milligrams.
TDS concept is an exotic, widely used in the United States, Taiwan, the field of water treatment, TDS value measurement tool is generally used TDS pen, the measurement principle is actually measured by the conductivity of water to indirectly reflect the TDS value in the physical sense , The more the water dissolved, the greater the value of water TDS, the better the conductivity of water, the greater the conductivity value.
Popular speaking: TDS value represents the dissolved impurities in water content.TDS value is greater, indicating that the water content of impurities, on the contrary, the impurity content is small.

'Factors influencing TDS testing'

Water temperature: TDS can not be used to measure high temperature water

Water flow rate: TDS can not be used to measure large swaying water bodies

'Product Range'

Detection of tap water, purified water, mineral water, water quality is in line with the state to develop drinking water standards: water 300PPM below, pure water 50PPM (national standard), mineral water 100-200PPM between.

'Application of common sense'

1, pure water, mineral water for a long time home, TDS value than the beginning of the rise is too high, the total number of viruses and colonies will be a corresponding increase, this time not drinking, affecting health;
2, pure alcohol TDS value of 0, greater than 0 said impure;
3, TDS is the total dissolved solids, such as the indication value of 100, which contains 100 mg per liter of impurities;
4, 3 floors above the user, from the top water tank water supply, easily lead to secondary pollution, should always detect changes in TDS value, can urge the property management department regularly cleaned.
5, the washing machine should be the number of detergent, TDS pen test can be digitized with the experience.Clean the program, the pre-drainage test shows the same value as the tap water can be regarded as clean, if the indication of more than tap water, should reduce the detergent input;
6, fruits, vegetables, such as water immersion, measured if the high TDS value can be suspected of chemical pollution, should pay attention.
7, to the swimming pool swimming pool can be measured during the cleanliness of the changes in the show should pay attention to high;
8, deep well water if the indication as high as 300 or more, indicating that high levels of impurities;
9, each region, the city due to the different pipes and water, TDS value is different;
10, the North hard water calcium and magnesium ions, TDS value is high, will scale;
11, spent the first time in accordance with the provisions of fertilizer preparation, the measured value, with the figure can be easily prepared in the future;
12, gold fish tank water can be measured its value, to know its cleanliness.If the value of a long choke, should be promptly changing the water;
13, marine aquaculture water, can be measured value for the future preparation and testing.
Note: This product is also applicable to engage in soilless cultivation, the need for conductivity measurement of nutrient solution ion content. This product can be used for nutrient solution concentration measurement of secondary numerical subtraction method is to measure a tap water TDS Value, then add the nutrient solution, measured its value, the value of the secondary subtraction is the value.

'Difference between conductivity and TDS pen'
Are two different concepts, one is the physical quantity is a power! But the measurements are the same. Are reflected in the quality of good or bad! Conductivity is to measure the total ion conductivity in water Waterproof pen is the sub-conductivity and TDS TDS is the content of solid matter dissolved in water. The value of TDS * 2 is approximately equal to the value of conductivity! But it is not absolute
The TDS value refers to the amount of solid matter dissolved in water, in milligrams per liter. If your water purifier has little or no adsorption of dissolved substances in water, the TDS value will not change appreciably.
TDS value is representative of the total content of water soluble substances, such as: calcium, magnesium ions and some trace minerals such as tap water TDS value is less than or equal to 1000 mg / l, water purifier is used to purify the water harmful to the human body sediment , TDS is a numerical value, but it is not a measure of whether water can be used to determine the amount of water in the water, and the amount of dissolved water in the water can be reduced, so the purified water TDS value can be no change. To achieve the direct drinking standards

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