SCIENTIFIC INSTRUMENTS 6290 - Option 4, Serial Link Tests; Option 5, Maintenance Functions; Edit Parameters; Option 1, Level (Edit Level Parameters)

090-252 Rev A
2-4
2.2.1.4 Option 4, Serial Link Tests
This option brings up another menu that is used primarily in development and
testing of the system. It could also be useful for troubleshooting
communication problems. In the Serial Link Tests menu, option 1 (Manual
String Entry) allows individual commands to be sent to the host. Familiarity
with the internal command structure of the host is necessary for this option.
Option 2 (Constant String Out) sends a fixed query command to the host.
Option 3 (Input Only) receives the answer to a query sent such as in option 2.
Option 4 enters another continuous display mode that sends the shortest
possible query and receives the shortest possible answer. This is useful for
analyzing communication signals with an oscilloscope.
2.2.1.5 Option 5, Maintenance Functions
This option brings up another menu that is used to access certain
uncommonly used maintenance functions. In the Maintenance Functions
menu, option 1 is "Cal level sensors." Selecting this option will cause a
command to be sent to the Control Module to adjust the D/A converters
(DAC’s) until the level sensor voltage is 2.5 V. This should only be done by
maintenance personnel following the applicable procedure. This is typically
done one time when the unit is installed. The second option in the
Maintenance Functions menu is "Force Host Exit." This should not be chosen
because this will cause the host program to exit and the 6290 will no longer
be operational; this step is only necessary when re-programming the host. If
this option should be chosen by mistake, it will be necessary to remove and
re-apply AC power to reset the host processor. Option 3 is “Configure Links.”
This option is explained in the Edit Modbus Configuration section, since this
option is also available there.
2.2.2 Edit Parameters
Pressing "EDIT" on the HHPC keypad brings up the Edit Parameters menu. The
Edit Parameters menu allows access to all system parameters that may be
changed by maintenance personnel. The first option on the Edit Parameters
menu is for editing level parameters.
2.2.2.1 Option 1, Level (Edit Level Parameters)
This option brings up the "Edit Level Parameters" submenu.
2.2.2.1.1 Option 1, Level Scale, Slow Speed
This option gives allows the user to edit level scale and slow speed. Level
scale is the distance in millimeters that the probe travels with each pulse
of the motor. Slow speed is the number of milliseconds between each
pulse when driving the probe is slow.