There are many types of instrumentation and have a wide range of applications in many fields. Because of this, there are many fault problems in the use of instrumentation, so it is necessary to pay more attention to the repair and maintenance of instrumentation, which can effectively improve the performance of instrumentation and extend its service life. The following is a brief introduction to the precautions for instrument maintenance and maintenance:
1. When disassembling and adjusting the instrument, the original position should be recorded for restoration.
2. In the maintenance of instruments and meters, first of all, we should understand the basic principles of instrumentation, and master the knowledge and skills related to electronics, and should prepare all the technical information such as manuals and drawings of instruments, and should develop a good quality of work, so as to improve efficiency and reduce mistakes in the maintenance of instruments and meters.
3. When repairing precision instruments, if you accidentally bounce small parts off, you should first judge the place where it may fall, do not look for it in the east or turn it in the west, you can take magnet scanning and line of sight scanning methods to find.
4. When repairing instrument failures in a humid environment, it is necessary to use a multimeter to measure whether the points of the printed circuit are smooth.
Because the main failure in this case is copper foil corrosion.
5. When using logic pen and oscilloscope to detect signals, it is necessary to pay attention not to make the probe contact the two measurement pins at the same time, because the essence of this situation is to form a short circuit in the case of power-on. When detecting the filter capacitor in the power supply, the positive and negative poles of the electrolytic capacitor should be short-circuited first, and the capacitor should not be discharged with a meter pen wire instead of a wire during a short circuit.
Because it is easy to burn the core wire. You can take a 220V, 60-100W lamp with lamp head lead, connect it to both ends of the capacitor, and the bulb will flash at the moment of discharge.
6. When overhauling the internal circuit of the instrument, if the contacts and circuit boards of the installation components are coated with insulating varnish, ordinary hand-sewn needles can be used to weld on the table pen of the multimeter when measuring the parameters of each point, so as to pierce the paint layer and directly measure each point, without peeling off the paint layer in a large area, and do not plug and unplug various control boards and plugs with electricity.
Because in the case of power-on, plugging and unplugging the control board will produce a strong induced electromotive force, and the instantaneous counterattack voltage is very high, and it is easy to damage the corresponding control board and plug.
7. Do not blindly knock and bump when overhauling the instrumentation, so as not to expand the fault and get worse the more it is repaired.
|
More on that
|
RLC thermostat - a classification introduction of floor heating thermostats
Floor heating thermostats can be divided into digital thermostats and analog thermostats according to different input and output forms. Digital thermostats generally have liquid crystal display or digital tube display panels, and set and control the temperature through buttons, while analog thermostats generally use knobs or slider band wave wheels to set ...
|
|
RKC level gauge - the fault and treatment method of float level gauge
Fault 1, the indication is abnormal
The float level gauge is not indicated properly and is a very common fault of the float level gauge. Usually there are the following manifestations:
Phenomenon 1: The float level gauge in the atmospheric pressure workshop has the largest indication.
Troubleshooting: The float was found to be ...
|
|
RKG thermostat - an introduction to the relevant knowledge of temperature controllers
The temperature controller is an electrical switchgear that controls the temperature of an air-conditioned room. The temperature range in the air-conditioned room controlled by the temperature controller is generally 18°C--28°C. The temperature controller commonly used in window air conditioners uses the principle of pressure to push the contacts on and off. Its structure consists of bellows ...
|
|
A few things to note about the installation of the RKC thermostat
1) For RTD input, 3 wires with low resistance and no difference should be used.
2) The input signal line should be far away from the power line of the instrument, the power supply line and the load line to avoid noise and annoyance.
3) The power cord of the instrument is generally annoyed by the power supply.
4) Instrument complement ...
|
|
What are the solutions to the failure of the RRKC thermostat - the sudden thermostat?
1. The cleanliness and finish of the contact surface have a great impact on the working condition of the contact. When the surface of the contact is rough or there is excess material on the contact, it is easy to cause arcing and reduce the life of the contact. Therefore, the parts cleaning process should be improved to eliminate excess materials; Increasing the process of screening excess materials, ...
|
|
RKC Thermostat Usage Warning
· Wiring warning:
- If the instrument fails or an error occurs, which can cause a system failure, install external protection circuits to prevent such accidents;
- To prevent damage or failure of the instrument, use appropriate fuses to protect the power cord and input/output cord from strong power shocks.
...
|
|
RLC thermostats – a common failure of mechanical thermostats
1. The terminal post of the thermostat is stuck and falls off
Cause the compressor not to start, the thermostat dynamic and static contacts can not be disconnected, so that the compressor does not run, the thermostat contacts can not be disconnected, so that the motor of the refrigerator compressor does not stop, in addition to the balance elastic force is too weak, it can also be ...
|
|
RLC Level Gauge - Classification and construction of pontoon level gauges
1. Classification of pontoon level gauges
The pontoon level gauge is also divided into two types: inner pontoon and outer pontoon, the so-called internal and external division refers to the place where the pontoon is installed, in the container of the liquid to be measured is the inner pontoon, and the outer pontoon is called the outer pontoon outside the liquid container to be measured.
|
|
RKC Thermostat – Teach you how to choose a thermostat
(1) Size selection
When replacing the thermostat, choose according to the original size; The newly added thermostat should take into account the overall coordination of the cabinet installed, too large to fit, too small to see the display, the same function of the thermostat, the price of large volume will be more expensive, small size may function expansion...
|
|
Overview of the RLC thermostat
CH and CD series intelligent temperature controller is a multi-functional adjustment instrument with special microprocessing, which adopts switching power supply and surface mount technology (SMT), so the instrument is delicate and compact, and the performance is reliable. The unique self-diagnosis function, self-tuning function and intelligent control function make it possible for the operator to pass the ...
|
|
RLC thermostat – what is the difference between a mechanical thermostat and an electronic thermostat
Mechanical thermostat mainly refers to a temperature control method that adjusts refrigeration by rotating the button, with an expanding thermostat, which will automatically expand and contract according to the change of temperature, so as to control the power supply, the most primitive type, and the structure is relatively simple.
Advantages of mechanical thermostats:
...
|
|
RLC thermostat – the wiring method of the thermostat
Many household appliances and large-scale equipment products will be installed in the use of thermostats, thermostats will be combined with the change of ambient temperature in the switch when working physical deformation, which will produce some special effects, resulting in conduction or disconnection action, in order to achieve automatic ...
|
|
RKC Thermostats – How to Choose a Thermocouple?
The selection of thermocouples should be based on comprehensive considerations such as the operating temperature range, the required accuracy, the operating atmosphere, the performance of the measured object, the response time and the economic benefits.
1. Selection of measurement accuracy and temperature measurement range
1) The operating temperature is 1300-1800°C, and the accuracy is required to be more accurate than ...
|
|
RKC thermostat REX-C400 model settings and parameter instructions
Japan RIKA RKC REX-C400 temperature controller product introduction
REX-C400 Digital Thermostat RKC PID Temperature Controller Thermostat (SSR Output) + Type K Thermocouple + *Large 40A SSR Relay
1. Dual display set temperature and process temperature
2. General Digital Programmable Temperature ...
|
|
Common faults in the use of RKC thermostat Pt100 RTD
PT100 RTD is a platinum RTD, which can be regarded as a more commonly used thermometer in the range of medium and low temperatures, and it has a wide range of uses, including medical, electric, industrial production, thermometers and other high-precision thermometers. But due to the range of use ...
|
|
Common faults and analysis of thermostats
Common faults of thermostats
1. There is no display when the power is on. This type of problem first determines whether the power supply is available and whether the power supply matches the power supply required by the thermostat, and then checks whether the wiring is secure. The problem is still there, then it is the problem of the thermostat itself.
2. There is a display, and the control is wrong. This...
|
|
RRKC thermostats – about output and control performance
When using a temperature controller to control a heater, it is necessary to convert the control calculation results of the temperature controller into electricity and apply it to the heater. Electromagnetic relays, solid state relays or phase controllers are usually used for conversion. Depending on the conversion method, the output of the temperature controller is different ...
|
|
RKC thermostat operation attention and its main features
RKC thermostat operation attention
· Clean the instrument only after the power is off;
· Please use a soft cloth or cotton paper to remove stains on the monitor;
· The display is easy to be scratched, it is forbidden to use hard object to operate the panel buttons, otherwise the keys will be damaged or scratched.
Key features:
...
|
|
Specifications and models of RKC thermostats
CH102 (48×48×100mm)
CH402 (48×96×100mm)
CH902 (96×96×100mm)
1. RH400 size: 48*96, depth 60, about 250g
1. Thermocouples: K, J, R, S, B, E, N, T, W5RE/W6RE, PL‖, U, L
...
|
|
RKG thermostat – the scope of application of underfloor heating thermostats
1) Separate households are independently heated, and floor heating is installed in small households, and boiler temperature control is applicable.
2) Separate households independent heating duplex building installation floor heating room temperature control.
3) Separate households for independent heating, large duplex villas are suitable for floor heating stratified temperature control.
...
|
|
Contact
working hours
