Notes for 47K ohm potentiometer           

 1. The resistors of 47K ohm potentiometer are mostly made of polycarbonate synthetic resins. They should avoid contact with ammonia, other amines, alkali-water solutions, aromatic hydrocarbons, ketones, lipids, strong chemicals (high acid-base value), etc. Otherwise, their properties will be affected.            

2. The terminal of 47K ohm potentiometer should avoid using water-capacitive flux when welding, otherwise it will promote metal oxidation and material mildew; avoid using poor solder, poor soldering may cause tin difficulty, poor contact or circuit break.            

3. The terminal of 47K ohm potentiometer may damage the potentiometer if the welding temperature is too high or the welding time is too long. Welding of pin-type terminals should be completed in 235 +5 C within 3 seconds. Welding should be over 1.5MM of the potentiometer body. No solder should be used to flow through the circuit board during welding. Welding of wire-type terminals should be completed in 350 +10 C within 3 seconds. And the terminal should avoid heavy pressure, otherwise it is easy to cause bad contact.            

4. When 47K Ohm potentiometer is welded, the height of rosin (flux) entering the printing press plate is adjusted properly. The flux should be avoided from intruding into the potentiometer. Otherwise, it will lead to bad contact between brush and resistor, INT and noise.            

5.47k ohm potentiometer is best used in voltage adjustment structure, and the connection mode should choose "1" foot grounding; current adjustment structure should be avoided, because the contact resistance between resistance and contact plate is not conducive to the passage of large current.            

6.47K ohm potentiometer surface should avoid condensation or water droplets, avoid using in wet places to prevent insulation deterioration or short circuit.            

7. When installing the "rotary" potentiometer to fix the nut, the strength should not be too tight to avoid destroying the screw teeth or poor rotation; when installing the "iron shell direct sliding" potentiometer, avoid using too long screw, otherwise it may hinder the movement of the sliding handle, or even directly damage the potentiometer itself.            

8. In the process of putting knob on potentiometer sleeve, the thrust force used should not be too large (not exceeding the parameters of the pulling force of the axis in the Specification), otherwise it may cause damage to potentiometer.            

9. The rotary operating force (rotation or sliding) of potentiometer will become lighter with the increase of temperature and tighter with the decrease of temperature. If the potentiometer is used in low temperature environment, it should be explained in order to use special low temperature resistant grease.           

 10. Potentiometer shaft or sliding handle should be designed as short as possible. The shorter the length of the shaft or sliding handle, the better and more stable the hand feel. On the contrary, the longer the shaking, the greater the change of hand feel.            The power of carbon film of 

11.47K ohm potentiometer can withstand the ambient temperature of 70 C, and it may lose its function when the temperature is higher than 70 C.