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INZ-TN5ZBAS-E
5.5 Blowback time chart example
Perform blowback periodically using instrument air or nitrogen to eliminate dust from the gas extractor.
A blowback example is shown in Fig. 5-9.
Hold contact output
instructed by analyzer
Contact output during
blowback
Analyzer internal aspirator
MV3 [SAMPLE]
MV2 [BLOW2]
MV1 [BLOW1]
T0
T1
T2
T0
T4
(T1 + T2) × m times T3
T3
Fig. 5-9 Blowback time chart example
T0 (blowback cycle time)
: 120 minutes
T1 (blow 1: external blow)
: 1 minute
T2 (blow 2: internal blow)
: 1 minute
T3 (blow pressure release time)
: 1 minute
T4 (hold extension time)
: 5 minutes
m (external blow blowback count) : 2 times
The above time chart is an example.
The time must be set to an appropriate value based on the measured gas conditions, analyzer speci
-
fications, and operation state.
