Maintenance on 7300 system

repair

Maintenance, repair and calibration of the processor electronics system 7300 is based on the concept of system reliability improvement and industry good practice postulates . Good practice includes many years of experience in repairing and calibration of the system and results in higher reliability and lower maintenance costs.

Maintenance of the ACM 7300 system, its calibration and solving the problems detected in the system can be simplified by using a specific specialized test equipment such as DAT 7300 - Board Tester. Part of the specialized equipment for instrumentation maintenance was developed and manufactured with the goal to test, repair, verify and calibrate the 7300 cards. The tester is used in interaction with the computer, which greatly simplifies and automates the maintenance of the 7300 system components. The idea was to develop a device that could check, calibrate, and maintain all the cards of the system. The tester is used for all types of cards for the system 7300 and is wirelessly connected to the computer.

testing

Testing

The test / calibration procedures for all types of cards are loaded onto the computer. The procedures are written in PowerPoint in "step by step" mode and synchronized with the tester. The text in PowerPoint is textually played in voice mode, in accordance with the procedure steps. The technician who performs the repair / calibration of the card, after an individual step, confirms it with the key on the tester. Successful execution of the previous step is a precondition for the tester to establish the conditions and to broadcast the instruction for performing the next step. In this way, the possibility of human error is significantly reduced. Minimum basic knowledge of the 7300 system is required in order to operate the board tester . General instructions are easy. Every beginner can easily get used to using the system in a straightforward way.

The main advantage of this device over other devices are additional modules for certain types of cards, which can check each card in accordance with the test / calibration procedure. The tester can identify an unusable or defective card. At the same time, it has a large number of status indicators, which enables the technician to easily arrive at conclusions when analyzing and repairing cards that have failed.

 

maintenance

Characteristics

Smaller dimensions make it possible to use the board tester in combination with two or three high accuracy control instruments that are required when working with the 7300 system.

Simplicity - one of the key advantages. Status review of all parameters that are important in the repair or calibration of a particular card.

Universality and multifunctionality - a feature that enables all types of 7300 cards to be analysed and calibrated.

The wireless connection to the computer greatly reduces the number of wires required to perform the test, which at a given moment constitute a potential jamming element when working on a task. The occurrence of errors due to incorrect wiring and extensive procedures is thus minimized.

The main components of the board tester are:

The power supply with adjustable output voltage and adapatble to the needs of the test, an additional variable voltage source which can be set in the range between + 10VDC and -10VDC, and a source of variable resistance. Additionally, the tester has a voltage and current signal source which is used when testing certain types of cards.  Current and voltage are displayed via digital indicators. For controlling the status (contact) between a certain number of pins, the LEDs are switched on. In parallel, there is an indication of the statuses.

The board tester consists of the following sections:

  • A section that manages the distribution of voltage on a specific card pin
  • Section for the use of external resistors used in calibration
  • A section with toggle switches for easier diagnostics of certain card types
  • A section of the output pins of the card itself that is being tested
  • "Status Light" section or section with LED indicators of card status
  • A section with LED indicators for displaying the digital condition of individual outputs
  • Completely digital graphical interface, touch screen – Human Machine Interface [HMI] to simulate input voltages and currents for certain types of cards.

The graphical interface (touch screen) is a programmable source of voltage and current that is required for the test and calibration of a particular type of card.

This part of the tester is programmed for exact functionality. It enables control over external resistors, over calibration of certain types of cards and over the use of specific types of tables that are scaled to the requirements of each card.

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