Haemonetics ACP 215, Руководство по обслуживанию

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44 Principles of Operation
P/N: SM-ACP215-01-EN(AB) Haemonetics
®
ACP-215
®
Service Manual
message will be displayed:
Air Sensor Tests
Each air sensor output signal is polled to test for an air signal (output is TTL
low). If a signal is measured as fluid (TTL high), a test line is activated on the
air sensor which disables the transmitter crystal and the signal is again polled
for an air signal. If the signal is still TTL high, the test will fail. One or more of
the following error messages will be displayed:
Analog Tests
The analog tests focus on the analog to digital converter and the device
peripherals that use transducers that have offsets. These tests are titled A/D
converter, DPM and SPM offset, CPU relay, and line sensor.
A/D converter
The system analog to digital (A/D) converter and multiplexer are tested by
applying known voltages, representing 20%, 50%, and 80% of the expected
input range, to its inputs, and measuring its output. Only the donor pressure
monitor (DPM) and system pressure monitor (SPM) channels are tested.
Note: Both the A/D converter and the multiplexer are located on the CPU PCB.
THE PROTOCOL PARAMETERS HAVE
RESET TO THEIR ORIGINAL VALUES
PLEASE REPROGRAM IF NECESSARY
IN THE READY MODE
PRESS YES TO CONTINUE
AIR DETECTOR FAULT: [SLAD]
CODE = 509
PLEASE POWER OFF.
PRESS YES FOR PROCEDURE STATS
AIR DETECTOR FAULT: [BLAD]
CODE = 510
PLEASE POWER OFF.