YJS-600 Digital Display Type Well Cover Hydraulic Compression Testing Machine

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Ⅰ、Main functions
This machine adopts hydraulic load, manual control, electronic measurement and digital display and has the function of force peak value preserving and manual eliminating force peak value. It is applicable for compressive strength test of well covers, which are made of steel fiber reinforced concrete and cast iron.
Ⅱ、Products catalogue
YJS-600A Standards:CJ/T121-2000、CJ/T3012-93
YJS-600B Standards:JC889-2001、JC/T948-2005
Ⅲ、Main Technical Specifications

Tyoe Parameters	YJS-600A	YJS-600B
Maximum testing force	600kN
Accuracy of testing force	±2%
Testing space(㎜)	1250×300	1280×260
Pressure plate size(㎜)	Ф356	Ф356（Manhole）；500×200、250×200（Water cover grate）
Piston stroke(㎜)	250
Power supply	380V±10%，50Hz
Overall dimension(L×W×H)(㎜)	1600×1000×1730	1600×1000×1800
Weight(kg)	2500	4000

Q: Precision pressure gauge manufacturers can achieve precision 0.05 pressure gauges?: According to the JJG49-1999 spring tube precision pressure gauge and vacuum meter verification regulation, the accuracy degree of the pointer precision pressure gauge is:0.6, 0.4, 0.25, 0.1, 0.06The accuracy of the digital table is followed by 2.5, 1.6, 0.5, 0.4, 0.2, 0.1, 0.05

Q: Our unit has a 2.2kW water supply motor, running with EV1000. How to control according to the remote pressure gauge? Is to control the pressure within a certain range. Read the instructions, there is a process closed loop control parameters, but not quite understand.. please expert advice. It's best to say what parameters you need to change.Added 15 points to answer satisfaction.: This is very good, quack, I am now out of the machine installed, in the evening to give you a satisfactory answer, the best for me to keep

Q: What's the meaning of diaphragm pressure gauge YTP-100?: Refers to the dial diameter of 100

Q: The pointer always points to the 0.5bar seismic pressure gauge, can not return to zero, the free end inside the broken? What's the reason then? Is the pressure too great?: Proof above the table generally have a rubber plug, use is to cut with the atmosphere. If you are not cut, long time work, the pressure in the case. When the pressure is released in the form of discharge after the shell pressure, so just. You put a rubber plug off, if not back to zero that is bad.Yes, it's not rubber. It's a small valveThe tables are required to be installed vertically or near vertical and sealed when removed

Q: What does "PV" and "SV" on the control meter of remote pressure gauges mean?: SV is the set point, and PV is the measurement value

Q: What is the PSJ of the pressure gauge?: Is that PSJ, not PSI?If it is "PSI", the English word "pounds per square inch" translates into pounds / square inches, a pressure unit used in European and American countries.Conversion relationship is: 1psi=6.895kPa, 1Mpa=145Psi.

Q: What are the main technical parameters in the selection of pressure gauges? Thanks: The selection principle is as follows:TypeThe selection of instrument type must meet the requirement of process production. For example, whether remote automatic recording or alarm; by nature side medium (such as the temperature of the measured medium height, viscosity, corrosive, flammable and explosive, dirt etc.) whether to put forward special requirements on the instrumentation, on-site environmental conditions (such as temperature, humidity, magnetic field strength and the vibration of the instrument) type etc.. Therefore, according to the requirements of the process, the correct selection of instrument type is an important prerequisite to ensure the normal operation of the instrument and safety in production.Two, measuring rangeAccording to the maximum and minimum values of the measured parameters, the upper and lower limits of the instrument can be calculated, and the measuring range of the instrument can not be directly taken as the measuring range of the instrument. When we select the upper limit of the scale of the instrument, we should select it in the standard series stipulated by the state. China's pressure gauge measurement range standard series are: -0.1-0.06,0.15; 0-1,1.6,2.5,4,6,10X10 "MPa" (where n is a natural integer. Can be positive or negative).Three, accuracy levelAccording to the maximum absolute error permitted by the process and the best range of the selected instrument, the maximum reference error allowed by the instrument is calculated, and the accuracy of the instrument is determined in the precision grade specified by the state. Generally speaking, the more sophisticated the instrument is, the more accurate and reliable the measurement result is. But you can not believe that the higher the accuracy of the instrument used, because the more sophisticated instruments, the more expensive the general price, the more difficult to operate and maintenance.

Q: The pressure gauge joint diameter is 21, 14 teeth per inch. What does it mean?: The number of teeth 14 teeth, thread big diameter 21 of the thread, usually G1/2, ZG1/2 or 1/2NPTIf your thread doesn't taper, that's G1/2.If there is taper, it may be ZG1/2 or 1/2NPT.. These two threads are easy to be confused and have to be measured carefully to distinguish them

Q: Measurement data, installed in the normal position, do not know whether to reverse installation, please professionals to help answer! Thank you Urgently!: 1. The installation position of the pressure gauge shall comply with the requirements of the installation state. The dial shall not be placed horizontally, and the installation position shall be convenient for the staff to observe.2, the pressure gauge installation and pressure point distance should be as short as possible, to ensure good sealing, leakage phenomenon can not occur.3, in front of the installation of pressure gauges should be buffer; to facilitate inspection, at the instrument should be equipped with shut-off valve; when the media is dirty or pulse pressure, you can use filters, buffers and regulators gas.The pressure gauge can be installed from any angle!

Q: Are you talking about using a gold contact? I'm a small relay for 24V. Do you need a gold contact?Let's talk about it.: I don't think it's necessary to use gold for contacts.1. The action of a contact on a pressure meter is equivalent to a switch used to conduct or disconnect the circuit. It does not require a power supply. The maximum operating voltage is 380V, and it can also be used for 220V or 24V (including AC and DC).2. Electric contact pressure gauge in the work process, will not contact in contact contact, due to voltage, spark will contact between the spark can burn contacts, lead oxide, so the electric contact pressure gauge work after a period of time will produce the phenomenon of bad contact, and can work normally after cleaning contact.3. In order to make the electrical contact work long time, it is important to note that the work power of the coil of the small relay in the back shall be controlled below 30W, otherwise it will burn up easily (contact power rating 30W).4. What material to choose contact is to consider comprehensively, choose pure gold or pure silver, only contact resistance is small, other aspects will not do.Our company produces a variety of electric contact pressure meter, suitable for a variety of industrial and mining use, interested can go up to see.

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