3 Test Programs and Diagnostics
Service Manual – Osmetech OPTI™ Analyzer
3-3
Once L2 has detected the trailing edge, L1 is looking for the trailing edge of the
buffer. L1 must detect the trailing edge between 1.2 seconds and 5.2 seconds.
The actual time is indicated by the first number on the display at the end of the
test. If the number is less than 1.2 seconds, replace the gas bottle and check the
output pressure of the gas module (2.5 psi ± 0.5 psi).
Next, the system reverses the pump direction and measures the time of the buffer
movement between LG1 and LG2. Since now the pump transports the buffer
against the gas pressure, the time needs to be between 4.0 seconds and 8.0
seconds to pass the test. The second number displayed at the end of the flow test
is the actual time. If the time is below 4.0 seconds, replace the gas bottle and
check the output pressure of the gas module. If the time exceeds 8.0 seconds,
replace the pump cartridge.
