Mindray Passport 5-Lead, Service Manual

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Passport 5-Lead, 5L, LT, XG Service Manual 0070-00-0420 7 - 13
Calibration Diagnostics and Calibration Procedure
External Loop Test
Data is transmitted to the external communication channel while in the normal operation
mode. Since pins 2 to 3 are shorted, the data is transferred back for reading and
verification.
External Communication Test Specification
Pass When every character is echoed back correctly
Failed When any character is echoed back incorrectly
3. Press the RECORD key to obtain a printout of the test results.
4. Press the END key to return to the Communications Menu.
7.5.4.3 NIBP Communication Test
Highlight the NIBP Communication Test and press the SELECT key to start the test. The
following test is executed.
Internal Loop Test
The results of the power up internal loop test for the NIBP communication channel on the CPU
Board are displayed. The test consists of putting the NIBP communication channel into loop
mode and transmitting data, and verifying that the correct data is read back.