UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page
172
Operating Instructions
6.6 Flow Sensor / Pressure Transducer Diagnostics (NC Pump)
6.6.1 Performing a Zero Balance Test (ProFlow Flow Meter)
Relevant only for the NC pump with a ProFlow flow meter installed
To ensure an accurate flow rate and solvent composition, the zero balance of the thermal flow
sensors and pressure transducers of the ProFlow flow meter must be calibrated from time to
time. Perform the
Zero Balance Test
to set the flow sensors and pressure transducers to zero.
To perform the test, navigate to the
Control
menu, select
Diagnostics
and then select the
Zero Balance Test
. In Chromeleon 7, run the test from the NC pump
Wellness
page of the
ePanel set by clicking
Adjust Zero Balance
. A wizard guides you through the procedure.
6.6.2 Calibrating the Pressure Transducers (Classic Flow Meter)
Relevant only for the NC pump with a Classic flow meter installed
The NC pump generates the flow rate by applying a corresponding pressure drop at the
flow selector. To ensure an accurate result, the pressure transducers must be synchronized
very well. Run the
Pressure Transducer Test
to verify that the pressure transducer offset
is still correct. If it is not, calibrate the pressure transducers.
Before
you begin: Observe the
Tips and Information
for performing the test further down
in the section.
1.
In Chromeleon, open a control panel and connect to the timebase in which the module
is installed (
→
page 89).
2.
On the
Control
menu, select
Diagnostics
and then select
Pressure Transducer Test
(in Chromeleon 7, run the
Pressure Transducer Test
from the ePanel, by clicking
Check Pressure Transducers
on the
NC_Pump_Diagnostics
tab).
3.
A wizard guides you through the procedure. Observe the following:
♦
When you run the
Pressure Transducer Test
after you have installed a
new
pump
head, you have to select the
Calibrate Anyway
check box in step 2 of the test (even
if calibration is
not
explicitly recommended).
♦
After calibration, the new value is stored automatically as the current value.
Tips and recommendations
•
The pump will have the best stability when it has been powered on by the main power
switch for at least 24 hours.
Recommendation:
Run the
Pressure Transducer Test
or perform pressure transducer
calibration after 24 hours or repeat the test or calibration after this period.
After shorter interruptions of the power supply (less than 8 hours), it is sufficient to wait
at least 1 hour.
Summary of Contents for Dionex UltiMate 3000 Series
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