P-600 SIC Analyzer Manual
Chapter V: Normal Operation
37
Remotely
The Analyzer may also be taken offline via an optional remote dry contact digital input closure (see Chapter
III). The instrument will remain idle until the signal is removed. A message indicating that the instrument
has been remotely idled is displayed on the Main Run screen.
Modbus communication can also be used to control analyzer status.
Validation
If the Analyzer is equipped with the Validation option, it will run a series of standard test cycles on a known
product when validation is requested. A passed validation is considered if the test results of two consecutive
readings, within maximum numbers of five attempts, are within a programmable bandwidth of a
programmable expected value.
Example:
Programmed Expected Value (In System Settings Screen): 8 PTB
Programmed Margin (In System Settings Screen): 1 PTB
Results from Validation Test #1:
6.9
,
7.6
,
6.8
,
8.4
,
9.1
=
FAIL
Results from Validation Test #2:
6.9
,
7.6
,
7.9
=
PASS
Request of Validation
The validation protocol is a requested procedure which does not take precedence in the operational
hierarchy. Therefore, the current cycle will always complete before moving to the validation protocol.
Validation is requested by writing a command (value = 1) to the associated MODBUS address (see current
MODBUS map for exact address). Alternatively, a local validation can be requested from the Validation
History menu at the local analyzer display. If done locally, the analyzer will ask the user to confirm if they
want to do this (ENTER = Yes, ADVANCE = No/Cancel).
Validation Supplied Hardware & Its Function
Two relays (SPDT, 250VAC, 6A rating) can be used for validation logic. They have been designated as
“Validation” and “Isolation”. The inputs (coils) of these relays will be activated automatically by the analyzer