Section 3 Operation
3-3
can be configured to inhibit a sampler until a
parameter meets user-defined conditions. For
example, a 4200 Flow Meter with a Model 201
pH/Temperature Module can be programmed to
suspend sample collection until the stream
temperature exceeds 100º F.
When the external device releases the inhibit,
the GLS will:
• immediately take the first sample
• reset the time or flow pacing interval and
begin counting down
• latch the inhibit signal
Latching the inhibit signal means that the GLS
will ignore any later inhibit signals from an
external device. Once the GLS collects its first
sample, its operation will continue until the
program is done.
Note
The GLS will not “store” samples while it is inhibited.
The GLS takes no action at all when it counts down a
complete time or flow-pacing interval.
Note
Sampler Inhibit signal (pin F) requirements - a low
(grounded) level of at least 5 seconds inhibits the
operation. A high (or open) level of at least 5 seconds in
duration restores the operation.
Содержание GLS
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