Hitachi ZA3000 Series Instruction Manual page 48

 Fuel Flow
Input ranges are as follows.
Air-C H : 1.0 to 4.5 L/min (when the standard
2 2
burner is used)
N O-C H : 5.0 to 8.0 L/min (when the high-
2 2 2
temperature burner is used)
Normally a flow rate (corresponding to the atomizer and
type of flame) that is suitable for the set element is
selected by default, and need not be changed for the
Standard Burner. When using the High-temp. Burner,
examine the optimum flow rate irrespective of the default
value, because the sensitivity may be largely changed
by the fuel flow rate and condition of the instrument.
Decrease the flow rate and determine the optimum
condition when organic solvents are analyzed.
 Oxd. Pressure
This is fixed at 160 kPa (23 psi). Even if changed on
the screen, the actual pressure will not vary.
The oxidant gas flow rate indicated (Oxd. Flow) will be
the value calculated according to the pressure of each
gas.
 Burner Height
Since the burner height is not set automatically, it must
be adjusted with the burner height-adjusting knob on the
flame atomizer section. The value entered on the
window is one to be recorded as a measurement
condition. Normally the optimum value is indicated as a
default setting, so the knob should be adjusted in
accordance with this.
 Delay Time
Input range is from 0 to 100 seconds.
Set a waiting time from the pressing of [Start] button
until the start of data acquisition. A value of 5 seconds
is normally sufficient. As the time from introduction of a
sample to stabilization of absorbance is set here, use
the standard solution for the element to measure and
make sure if the absorbance is fully stabilized in the set
delay time.
Note that when an autosampler is connected to the
system, it will take some additional time for the sample
to reach the atomizer after the start of sample
introduction, and the delay time therefore may need to
be increased.
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