Agilent Technologies Flow Tracker 1000, Справочное руководство

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22 Reference Manual
Flow Tracker Series 1000/2000
Split ratio = present volumetric flow rate / reference flow
rate
In gas chromatography, the reference flow rate is normally the
main column flow rate, and the present flow rate is normally
the split vent flow:
Split ratio = split vent flow rate / main column flow rate
This parameter reads:
• “DIV0” (division by zero error) until a value is stored in the
reference flow buffer as described in the
Reference flow
section, or
• “OVRFLO” (overflow) if the resulting ratio is too large to
display. This can occur if the stored reference flow is very
near zero and/or the present flow is high. The maximum
value that can be displayed here is 655.35.
Gas select
The selected gas is shown in the upper right hand corner of the
display. Available gases are listed in
Table 4 .
Low battery indicator (LO BAT)
The low battery indicator, located just above the mode indicator
in the lower right corner of the display, appears if the batteries
run below a certain voltage level that can affect the accuracy of
the flowmeter.
GC mode indicator
This indicator is located in the lower right corner of the display
and simply indicates that the unit is in GC mode. The operating
mode can be changed by pushing the
MODE button.
C A U T I O N
To avoid inaccurate readings, be sure to change the batteries when the
LO BAT indicator is displayed. Low power can result in inflated
temperature sensor readings which affect the expected gas viscosity
and mass flow calculations.