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Calibration Verification Procedure
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Summary
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The BP-4000 programming sites are self-calibrating. During operation, each pin driver is continuously monitored and calibrated by a special supervisory circuit. The self-diagnostic test will verify correct operation of the pin drivers, power supply, CPU, memory and communications. It is not necessary to re-calibrate the unit in the field. However, it is necessary to verify the accuracy of the self-test to insure that it will provide accurate results. The BP-2500 uses an internal Digital Volt Meter (DVM) to measure the voltage and/or current of 13 internal nodes and 48 analog pin drivers, allowing verification. This accuracy may be verified with a DVM. (It is assumed that the DVM is traceable to NIST for ISO9000 certification)
An option in the self-diagnostic test may be executed to allow testing of the accuracy of the internal DVM and time base using a bench DVM and oscilloscope or period counter. We recommend that the following procedure be performed every 12 months. If any programming site fails self-test, it must be returned to the factory for repair and failure analysis under an RMA. This procedure can also be performed on site by a BPM field service engineer. Contact BPM for a quote.
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Details
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| Calibration Verification Procedure
Equipment required:
Digital Volt Meter (must be rated at 0.1% precision)
Oscilloscope
1. Start BPWin and ensure communication with the programming sites.
2. Install an SM48D (48 pin DIP socket module) on the first site to be calibrated.
3. Select Tools/Programmer Diagnostics. From the main menu of BPWin.
4. Select the SINGLE unit self test, and the corresponding site number. Continue the self-test and perform the calibration verification for each site, following the procedures below.
Procedure for verifying accuracy of internal DVM:
1. Select YES when prompted to verify the calibration. Ensure there is no device in the socket. Follow the instruction on screen.
2. Connect the BLACK lead of your DVM to pin three of the DIP socket.
3. Measure the voltage at pins one and two of the DIP socket and check that they fall within the minimum and the maximum levels displayed on the screen. Record the minimum, the maximum and the actual DC voltages.
4. Press any key to continue the test. This brings up the AC verification test. At this point, the programmer will produce a 900us positive pulse width on pin one of the DIP socket.
5. Use an oscilloscope or period counter to verify that the positive pulse on pin one is between 890us and 910us. Record the minimum, the maximum and the actual AC voltage.
6. Press OK to continue and the programmer will continue with the normal self-test. The programming site must pass the self-test.
This completes the traceability test. The above procedure must be performed on each site on the 4000 APS. Create a “COC” calibration document that contains the following information:
Model and serial numbers of the test instruments.
Traceability numbers for the test instruments.
Model and serial numbers of the programming sites.
Minimum, maximum, and actual voltage values.
Name and company of the tester.
Date and due date of the calibration verification.
This is a verification of the programmer’s calibration. If the programmer fails any part of this test procedure, it will require factory service. NOTE: BPM Microsystems’ programmers cannot be calibrated in the field. A failed calibration indicates that a hardware error has occurred and the site must be sent to BPM Microsystems for repair.
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Last Modified: 12/01/2011
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