Mindray Passport 5-Lead, Service Manual

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Diagnostics and Calibration Procedure Calibration
7 - 12 0070-00-0420 Passport 5-Lead, 5L, LT, XG Service Manual
1. Internal Loop Test
a. Highlight the Front End Communication Test and press the SELECT key to start the
test.
The results of the power up internal loop test for the front end communication
channel on the CPU Board are displayed. This test consists of putting the front end
communication channel into a loop mode and transmitting data, and verifying that
the correct data is read back.
Internal Loop Test Specification
Pass When data is read back correctly on first attempt.
Intermittent When first attempt fails, test is repeated and data is
read back correctly on second attempt.
Failed When data is not received correctly on the second
attempt.
The communication channel on the Front End Board is placed in the echo mode and a test is
run which sends an ASCII character to the Front End, and verifies that the character echoed
back is the same character which was sent. The test is repeated for the entire ascii character
set.
Echo Test Specification
Pass When every character is echoes back correctly
Intermittent When some character, but not all, are echoed
back correctly.
Failed When every character is echoed back incorrectly
b. Press the RECORD key to obtain a printout of the test results.
c.
Press the END key to return to the Communications Menu.
7.5.4.2 External Communication Test
1.
Jumper pins 2 and 3 together on optional J1 interface connector.
2.
Highlight the External Communication Test and press the SELECT key to start the test. The
following tests are executed.
Internal Loop Test
The results of the power up Internal Loop Test for the external communication channel on the
CPU Board are displayed. This test consists of putting the external communication channel
into the loop mode and transmitting data, and verifying that the correct data is read back.