Waltron 9072, User Manual

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Waltron User Manual 101-054-A.1
9072 Hydrazine Analyzer
MEASURING MODE
5
MEASURING MODE
5.1 OPERATING CONDITIONS
For an accurate measurement of hydrazine, the probe’s environment must fulfill certain
conditions regarding conductivity, flow, temperature and pressure.

The sample conductivity must be ≥

3 µS/cm; otherwise the salt cell must be
refilled (see also Section 4.2 ).

The flowrate has to be between 3 l/h and 208 l/h (The optimal flowrate is about 10
l/h).

The temperature of the sample should range between 1 °C and 60 °C.

The pressure to which the probe should be subjected at least 400 mbar and may
not exceed 8 bar. Operating conditions outside this range require either a probe
pump or a pressure reducing valve.
Connect the probe line on the fitting tube of the inlet valve. Adjust the flow very
carefully and slowly. You have to make sure that no sudden pressure occurs and you
should verify that all air bubbles in the tube system rinse out. To help the bubbles to rinse
out, open and close quickly the inlet valve several times.
Attention: Make sure that the plugs stay dry.
5.2 ANALYZER CALIBRATION
After the hydrazine analyzer is installed and the medium flows through the analyzer, the
calibration can be performed. The first calibration should take place after letting the
sample flow, for approximately 30 minutes. During the calibration the operation
conditions should not change.
Method 1 : by a parallel chemical determination of the hydrazine concentration
(classical laboratory method)
You are in the mode for hydrazine measurement and have pressed
PIN number. Select SubCal:
The setting of the present hydrazine concentration is performed digit for digit. If the
value is correct, press key SET. Your calibration value is stored and the instrument
determine the current sensitivity of the measuring electrode by the modern
microprocessor. The indication jumps one step back in the menu. The k-Factor value can
be displayed in the level Parameter > k-Factor.
SubCal
000.0 μg/l