11-07-2013
P-800LT Freeze Point Analyzer
5-5
Normal Operation
A
LARMS
H
ISTORY
Operational alarms are logged and may be accessed via the Alarms History sub-menu. To access this
sub-menu, go to the Main Menu, select Alarms History, and touch Enter. The Alarms History screen will
appear.
To clear the alarm history, touch the Enter key when Reset is highlighted.
T
AKING THE
A
NALYZER
O
FF
-L
INE
The P-800LT Freeze Point Analyzer may be taken off-line either locally from the front panel of the
instrument or, if wired to do so, remotely via a contact closure from the control room.
L
OCALLY
To exit analysis from the instrument’s front panel, first access the Main Menu by touching the Advance
Screen Key with the magnetic pencil and then select Status. Touch the Up/Down Arrow keys to toggle the
status to OFF.
R
EMOTELY
The Analyzer may also be taken off-line via an optional remote dry contact relay closure (see Section 3).
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.
P
ERFORMING
A
V
ALIDATION
M
EASUREMENT
If the Analyzer is equipped with the Validation option, operating personnel can check measurement
accuracy using a sample with a known freeze point value. This procedure is initiated via a control room
contact closure (see Section 3).
When a validation check is initiated, the instrument analyzes the validation sample just as it would an
actual hydrocarbon sample. At the end of the measurement cycle, the measurement results for the
validation sample are displayed on the Main Run screen. A message indicating that a validation
measurement is in progress is displayed on the Main Run screen.
