Generally, the PH electrode must be activated when the PH meter is not used for a long time. The activation method is to wash in the KCL solution of 3MOL for 24 hours, rinse with demineralized water, and then use the standard solution for calibration. The selection of the standard solution should be based on You usually choose the PH value of the water sample.

The following is the calibration method of the PH meter:
1, first check whether the electrode has been soaked in the electrode storage solution
2. Prepare a pH 6.86, pH 4.01, and pH 9.18 buffer solution
3, the above two points are satisfied, calibration can be performed
4, the mode as "pH" state
5. Clear the previous calibration data: Press “SETUP” key, the display shows “Clear buffer”, press “ENTER” to confirm
6. Press the "SETUP" key until the display shows "1.68, 4.01, 6.86, 9.18, 12.46". Press "ENTER" to confirm.
7. Carefully remove the electrode from the electrode storage solution. Rinse the electrode thoroughly with deionized water. Rinse clean and dry the surface with filter paper (Caution! Do not wipe the electrode).
8. The pH meter in the laboratory is not immersed for a long time. The electrode is immersed in a pH 6.86 buffer solution and stirred well. Wait until the value is stable and “S” appears, press the “STANDARDIZE” key, wait for the instrument to automatically calibrate, if the calibration time is too long, press the “ENTER” key to manually calibrate. After the calibration is successful, the value as the first calibration point is stored, displaying "6.86" ​​and the electrode slope information "%SlopeXX". XX shows the measured electrode slope value, which is acceptable within the 90-105% range. If there is only a larger deviation from the theory, an error message (Err) will be displayed, the electrode should be cleaned, and the above steps should be repeated to recalibrate. .
9. Remove the electrode. Repeat steps 3 to wash the electrode. Immerse the electrode in pH 4.01 buffer solution and repeat step 8. After successful calibration, the value as second calibration point is stored, display (4.016.86) and electrode slope information

Flexible Gate

Flexible lift gate is a flexibel soft curtain door, inside and outside the two curtains , curtains used between the aluminum beams connected with a vertically movable rail , the roof beams have levels not in the same straight line and hanger large plants in particular Be applicable , Flexible lift door installation does not take up interior space in the hole inside , When the first move to open the door , and finally superimposed over the hole , Off event curtain rail first and then fall down until its is completely closed

Door body composition :

The bottom of the door curtain rail aluminum beam beam seal top drive system and transmission of electrical control systems and safety devices

Flexible door features:

1. Light weight compared with other types of the same size door , flexible door lighter weight reduces the strength of steel at the top of the doorway architecture degree requirements ,

2. Small compared with the same specification of the machine style doors 2, footprint ,flexible installation in the door after the hole is turned on internally stacked above the hole , do not take up interior space , Large Span hole may be provided a plurality of movable rail the entire door into several independent stacking doors shorten the span of a single door so that the overall thickness of the door is reduced , further reducing the footprint

3. Rational layout flexible doors with movable rail rail can set different activities based on the specific circumstances of the door into the door several sizes of uneven accumulation of doors to make the building as a whole rational layout greatly reduces the overall architecture of the space and cost

4. The wind strength between two layers of high flexible door curtain as the bottom of an aluminum beam has a wind skeleton steel structure , By adjusting the beam thickness and spacing , which can resist wind pressure of any intensity , so the door can be flexible for use in any area

5. The tensile strength of the flexible door after door curtain is double polyester fabric , high tensile wire rope equipped with ultra-high hole suitable for large machinery such as aircraft hangars and repository

6. The curtain coated with vinyl coated with a waterproof sunscreen and smoldering performance , capable of sound absorption retardant insulation mildew proof and so on

7. Safe door , Cube with anti-lock break to ensure safety in case of accidental breakage of wire rope jammed in the door quickly experience anywhere rails , Multiple protection features mechanical and electrical installation to ensure t he safety of goods passing aircraft and other vehicles and personnel , the movable rail is also equipped with anti-fall device , you can ensure reliable parked at the top of the hole after the movable rail is raised without falling , The bottom of the door is equipped with and airbag , it will immediately rebound to rise until the safety door drops open when obstacles encountered in the process , You can also install infrared protection device on the door

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SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , https://www.hongfafrud.com