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When the battery voltage indicated drops to 4.6 Volts for alkaline or 4.2 Volts for
rechargeables, you have only a few more minutes of battery life remaining. Using
the printer will further reduce battery power. Always check the battery voltage
with the pump turned on.
If you are using non rechargeable batteries the voltage will drop slowly and
gradually from 6 Volts to 4 Volts. If you are using rechargeable batteries the
voltage will stay fixed for several hours at 4.8 Volts before starting to drop rapidly.
In addition to the battery condition indication, there will be a warning during
instrument operation and also at start up, if the batteries are low.
If you are using the thermoelectric cooler assembly, reduce the cooler duty cycle to
extend the battery life. To further prolong battery life, you can turn off the
display’s back light illumination.
B. SAMPLE FLOW DESCRIPTION
During operation, the metal tube of the probe (see figure 1) is inserted into the
stack. A small pump located inside the unit draws a sample of the stack gases into
the instrument for analysis. The probe assembly and sensor housing are described
below.
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