What tools are needed for instrument joint school?

1. HART handheld communicator intelligent instrument settings, view parameters 2. Multimeter measures resistance, short circuit, current, voltage. 3. A set of tools.

1. A set of pressure validation instrument and smart handheld operator (validation pressure transmitter and pressure switch) 2. A process validation instrument (simulating the output and detection of various analog signals) 3. A resistance box (simulating the thermal resistance signal, the thermal resistance signal output by the process validation instrument is an active signal, there will be errors when simulating the thermal resistance signal validation, so a resistance box is used) 4. Common tools: Such as multimeter, screwdriver, etc.

I forgot one thing, it is best to have two walkie-talkies. If the system also needs you to maintain, you should also have a laptop.

Does your company have the qualifications and test equipment to calibrate thermal resistors and thermocouples? If not, it needs to be sent to an inspection department with relevant qualifications for verification. Usually, RTDs and thermocouples are sent out for calibration.

The joint school only needs to prepare a short wire and some common tools, such as a screwdriver, a 6-inch, 10-inch, 12-inch wrench, and a multimeter. The tools are mainly used for troubleshooting. FLUKE 744 communicates with the transmitter of the HART protocol to adjust the range and so on. Radar level gauge requires a laptop and related software. The combustible gas detector requires a sample gas for on-site verification to see if it alarms. For others, use short-circuiting wires to short-circuit the positive and negative wires and check if there is a change on the DCS. If there is no change, just deal with it.

When the project enters the joint debugging stage, the most convenient tool is the FLUKE calibrator, which has a comprehensive range of signal types. Of course, the five major items required by the instrument factory also require people.

According to our factory joint debugging, at least three parties need to cooperate. 1. Wiring ； 2. Screen configuration and control system software programming ； 3. Instrument installation In fact, the word "joint" in joint debugging has two meanings.: 1. System overall "connected" test. Refers to signal collection from the site, process transmission, signal processing, signal feedback, etc. ； 2. All relevant responsible persons conduct a "joint" test. Because a system is generally not completed by one layer. Therefore, what tools the poster needs depends on which level he is in charge of.~

1.Temperature: Multimeter, FLUCK725 multi-function calibrator, precision resistance box ； 2. Pressure transmitter: Portable pressure calibrator or pressure gauge calibration bench, various connectors, multimeter, 24V regulated power supply, HART375 or BT200, milliammeter ； 3.Flow meter: If you are measuring pulses, such as vortex streets, you need a multimeter, frequency signal generator, and 24V regulated power supply. ； If it is a differential pressure type, the same pressure transmitter as above is required.

1. Pressure tester 2. Smart handheld device 3. Process tester 4. Resistance box

To put it bluntly, on-site instrument joint calibration requires two instruments, one is a signal detector and the other is a signal generator. However, some of the current instruments combine the functions of the two, such as FLUKE725, BT200, and HART. 375, of which 725 has the most functions. It can measure and simulate signals such as temperature, frequency, current, voltage, resistance, etc. It is an essential tool for instrument engineers. It also has a multimeter, resistance box, UJ36a, line breakage detector, and a 65-piece set. Tools, as mentioned above, there are analyzers and fuel alarms, which should also be equipped with various calibration gases for calibration. Finally, I have a suggestion. During the joint school, the instrument personnel must not forget a small tool--a test pen. Don't underestimate it. In practice, it may solve big problems.

Is FLUKE744 better than FLUKE725? Our company uses 744

The third floor has already mentioned the tools required for instrument joint schooling very accurately. I will sit down and add some relevant content about instrument joint schooling. From the relevant content, you can understand why these equipments are needed.: Instrument adjustment 4.10.1 General provisions for single instrument calibration A. It should be carried out in accordance with the instructions and relevant regulations. B. Before adjustment, carefully check the instrument's serial number, specification model, characteristics, size, material, measurement range, scale, graduation number and measurement unit according to the instrument specification table (equipment table). C. All instruments must be visually inspected, and all electric instruments powered by 220VAC must be tested for insulation resistance. D. The standard instrument used for calibration must be within the qualification period, and the absolute value of the basic error of the standard meter should not exceed 1/3 of the absolute value of the basic error of the calibrated meter. E. Instrument calibration points are generally not less than 5 points, and should be selected evenly within the scale range. F. After the adjustment is completed, the calibration record must be filled in carefully. The record must be clear and neat, and the original record must be kept. 4.10 2 Instrument single calibration items. 1) On-site thermometer and pressure gauge calibration basic error inspection 2) Regulating valve A, basic stroke error variation, inspection B, accident full stroke time test C, leakage flow inspection D, diaphragm head air tightness test E, valve body strength test and strict Tightness test 3) Proximity switch contact action inspection 4) Intelligent transmitter A. Software generation, input, debugging B. Basic error inspection 5) Special instrument inspection and other A. Instrument equipment that cannot be adjusted on site (such as various flow meters) does not undergo individual debugging. If this part of the instrument needs to be adjusted (calibrated), it will be the responsibility of the supplier, or the relevant department of Party A will be responsible for contacting the inspection unit and submitting it for inspection. B. The individual adjustment of the random instrument can be carried out by referring to the above-mentioned instruments of the same type. C. For single adjustment of conventional instruments and equipment not mentioned above, you can refer to the inspection items of the above-mentioned instruments, and no additional inspection items will be specified. 4.10.3 Instrument loop joint calibration 4.10.3.1 Conditional system loop test is a means of comprehensively assessing the system hardware, software, cables and field instruments. The loop test can only be carried out if the following conditions are met in advance. A. All external conventional instruments and parts related to system control must be debugged and inspected to be qualified. B. The wiring of all connecting cables must be correct and free of short circuit and grounding. C. The grounding system (AC, DC) must be complete and qualified. D. The electrical major has passed the debugging, and the electrical major has the conditions to receive and output signals. E. The setting values ​​of various process parameters have been determined. 4.10.3.2 General provisions (1) Before all systems are inspected, the installation of instrument equipment, piping, wiring, air sources, power supplies, and regulators in the instrument system must be carefully checked according to the design drawings, and whether the measurement units are consistent with the design. Key parameters such as the air source pressure and input signal of the regulating valve, the positive and negative effects of the positioner, and the measuring range of the transmitter are all checked and adjusted according to the instrument equipment specification sheet. If these parameters on the instrument equipment nameplate are inconsistent with the design, they must be corrected. (2) The standard table used for inspection must be within the qualification period, and the absolute value of the basic error of the standard table should not exceed 1/3 of the absolute value of the system error of the loop being calibrated. (3) System inspection should check the common functions of each instrument in the system. The system verification points should generally not be less than three points. 4.10.3.3 System loop test (1) General test method for system loop: A group of 3-4 people is usually used to perform loop testing. Analog signals are added to the instrument part on site for operation and monitoring at the operating station and monitoring at the control station. Get in touch via intercom. According to the size of the system capacity and the number of operators, it can be divided into several groups and carried out simultaneously. Loop test coverage should be 100%. In order to prevent phase leakage, proceed in the order of the "Loop Atlas". First, call up the point screen display of the loop to be calibrated one by one from the operating station CRT, confirm it is correct, and then send or receive signals from the on-site instrument. The test method is similar to the conventional instrument loop linkage calibration. The analog value should include the starting point and end point of the measurement range, which should not be less than 5 points. The displayed value of the CRT should not be lower than the accuracy requirements. (2) General debugging steps of system loop A. Confirmation of display: Confirm whether the configuration of each tank circuit is consistent with the design. Confirm on the operating table B. Calibrate the circuit and simulate the process conditions of the interlocking, and check whether the interlocking action is correct. C. Single circuit test: The simulated process condition inspection and operation include the following contents:: 1) Set point setting 2) Proportional integral time and differential time setting operation 3) Valve position limit and PV alarm limit setting operation 4) PV tracking check 5) Alarm output check 6) Whether the valve position output positive/reverse action and the action of the actuator are correct or not, perform manual output on the keyboard to check whether the action value of the actuator meets the accuracy requirements D. Complex loop test: The process conditions should be simulated to carry out single loop inspection step by step or step by step, and then the entire loop system inspection should be carried out. E. The system loop test types are as follows:: System loop test type table Loop type Operation station operation CRT display On-site operation calibration instrument analog quantity measurement AI Call up the point screen of this number to observe the bar graph and PV value Add the corresponding process parameter signal (P, ΔP) from the measuring end of the transmitter to output mA signal Pressure calibrator Thermal resistance measurement loop TI Call up the point screen of this number to observe the bar graph and PV value Remove the cable on the thermal resistor terminal block and replace the resistor body with a standard resistance box Analog output AO Call up the point screen of the control loop of the position number, execute the manual operation state, and make the output change from 0-100%. A. If the regulating valve is at 4-20mA, observe the correspondence between the valve position meter reading and OUT on the CRT. ； B. If the 4-20mA current is sent to other equipment outside the system (such as to motor speed regulation), insert a mA meter in the loop to measure the current. On-site calibrator (3) The detection system uses the input terminal of the on-site instrument to add modules equivalent to 0%, 50%, and 100% of the measuring range according to the forward and reverse strokes. Analog signal, monitor the input value of DCS with a digital multimeter, and observe the display value of the operating station at the same time. The error shall not exceed the square root value of the sum of the squares of the allowable errors of all instruments in the system. If it exceeds this value, all instruments in the system (including DCS software) should be adjusted individually and the lines or pipelines should be checked. (4) The analog signal is added to the input end of the field instrument in the adjustment loop, and a digital multimeter is used to monitor the input and output signals of the DCS to test the system's basic error, proportion, integral, differential action, and automatic and manual two-way switching performance. Through the DCS operating station, manually input a 4-20mA current signal to the regulating valve to check the action of the regulating valve and perform stroke accuracy inspection. At the same time, check whether the valve position status indication of the operating station is consistent with the actual valve position opening and closing indication on site. If the system is unqualified, all instruments in the system (including DCS software) must be adjusted separately, and the lines and pipelines must be checked. (5) Interlocking system The interlocking system can be decomposed into a single interlocking loop according to the interlocking detection points. The parameter setting and testing of a single interlocking loop are basically the same as the debugging of the above alarm system. When a single interlocking system passes the test, the linkage test of the entire interlocking system is performed. The actions of the linkage test and the electrical interlocking points sent to it must be correct and reliable.

One more thing, the cable insulation resistance test record requires a hand-cranked meter. Currently, you can order a digital one, but don’t order the hand-cranked one before: lol

Reply to the 12th floor: You are right. We generally use FLUKE744 now, but the price is higher, so we are also equipped with many powerful 821s.