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Chapter 7: Operation with the Filter Panel
Sample Flush and the measurement itself consists of two repetitions. The Blowback Pulses parameter was set
to 2. This means that the filter is back flushed twice with compressed air prior to the Sample Flush and prior to
each measurement repetition. The duration of each pulse is 0.5 seconds followed by a 2.0 second delay for a
total time of 2.5 seconds for each pulse. Depending upon the composition of the sample stream, the number of
pulses can be set to any value between 0 and 10.
N
:
The number of pulses required is highly dependent on the composition of the sample water. Use
OTE
the fewest Blowback Pulses for your particular sample water that produces a reliable flow of
filtered water to the Analyzer.
The Sample Flow Time establishes a delay time between the last pulse and the start of sampling of the filtered
water by the Analyzer. This delay is evident before the Sample Flush and before sampling begins for the first
repetition. It also exists before sampling begins for the subsequent repetitions, but it is less evident because the
Analyzer is completing repetition 1 while it is preparing the sample to be used in repetition 2.
To set up operation of the Filter Panel
1.
Stop any analysis.
2.
Confirm that sample water is flowing through the Filter Panel (Reference the Filter Panel Operations and
Maintenance Manual, as needed.)
3.
Confirm that the filtered water tube is connected to the Filter Panel and to the Analyzer. The tube should
be connected either to the Inlet port of the sample cup, or to the Inlet port on the optional peristaltic
sample pump.
GE Analytical Instruments ©2016
Figure 69: Blowback Pulses and Sample Flow Time
174 of 270
DLM 68100-09 EN Rev. A
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