Advanced Instruments 3900, Руководство пользователя

Страница: 34 / 131

The Advanced
®
Osmometer Model 3900 User’s Guide
The operator keyswitch position only allows access to the START sam-
ple test, INSERT (STAT) sample test, STOP, paper FEED and RECALL
functions; the Supervisor keyswitch position additionally allows access
to the SETUP, CALIB rate and TEST functions.
If the SETUP or TEST button is pressed while the supervisor/operator
keyswitch is in the operator (horizontal) position, a “ Supervisor Key
Needed ; Press STOP to Continue ” message is continually scrolled
across the display until STOP is pressed. When STOP is pressed, the
message will change back to “ Ready ”, re-enabling the sample test
function.
The CALIB button has no effect until the instrument has completed the
power-up diagnostic checks. If the CALIB button is pressed after the
instrument has completed the power-up diagnostic checks and the
supervisor/operator keyswitch is in the operator position, a “ Supervisor
Key Needed; Press STOP to Continue ” message is continuously
scrolled across the display until STOP is pressed.
Sample Tube Cassettes (Figure 4)
Other than priority “INSERT” tests, all tests should be run on samples
in tubes loaded into the cassettes provided. The cassettes contain mag-
netic identification and sample location.
16
Carrier Direct 1 to 3900
Receive Data 2 to 3900
Transmit Data 3 from 3900
Data Terminal Ready 4 from 3900
Signal Ground 5 common
Data Set Ready 6 to 3900
Request to Send 7 from 3900
Clear to Send 8 to 3900
Signal Pin Direction
Table 2: Communications Port Connections