Be sure to know before using the pH meter
YQ(Y)W Series Gas/oil fired Thermal Oil Heater
YQ(Y)W series gas-fired/oil-fired thermal oil boilers have a three-pass round coil structure. A conical coil is used for the effective protection of the furnace wall at the boiler end. This product is equipped with an advanced combustion device and is fully automated in operation. After the burner ignites the fuel, flame fills the round coil tubes and transfers heat by radiation through the tube wall (first pass). The high temperature flue gas gathers at the back door and then turns to the convection tubes section (second pass), where heat transfer takes place by convection. The flue gas gradually cools down here and flows to the front door, where it is reversed and goes into the third pass. After that, it enters into the chimney through the economizer and is released into the atmosphere.
This type of heater is delivered as a whole, and is installed on site, it only needs to connect thermal gas(oil) piping and electricity to start operation. The heater has four heating areas: furnace radiation heating area, the first convection tube bundle heating area, the second convection tube bundle heating area and economizer (waste heat boiler).
WUXI ZOZEN BOILERS CO.,LTD. , https://www.cnzozen.com
For samples with a measurement accuracy below 0.1 pH, a one-point calibration method can be used to adjust the pH meter. A pH 6.86 or pH 7.00 standard buffer is generally used. Some acidometers have an accuracy of only 0.2 or 0.1 pH, and only one "positioning" adjustment knob is provided on the pH meter.
The procedure for operating a one-point calibration is as follows:
(1) First measure the standard buffer temperature, look up the table to determine the value of the pHs, and adjust the temperature compensation knob to this temperature.
(2) Rinse the electrode with pure water and spin dry.
(3) After immersing the electrode in the buffer solution, shake it and place it still. After the reading is stable, adjust the positioning knob to make the instrument display the pH value of the standard solution.
(4) Take out the electrode and dry it.
(5) Measure the sample temperature and adjust the pH meter temperature compensation knob to this temperature value.
(6) Immerse the electrode in the sample solution, shake it and place it still. Display a stable reading.