Flow Sampler - Siemens SITRANS L 7ML5400 Operating Instructions Manual

General Operation
7.10 External Totalizers and Flow Samplers
7.10.3

Flow Sampler

Use the External Sampler (2.11.4.) (Page 220) function to activate the flow sampler relay
based on volume and time.
Counter Formula
1 contact every x units, where x = value set
in Multiplier (2.11.4.2.) (Page 221)
Example: To click once every 4310 units, set Multiplier (2.11.4.2.) (Page 221) to 4310.
The totalizer source, and units depend on the volume configuration:
Volume Configuration
Vessel Shape (2.6.1.) (Page 184) =
NONE
Vessel Shape (2.6.1.) (Page 184) = any
setting other than NONE
By using Multiplier (2.11.4.2.) (Page 221), the relay contacts can be based on a volume other
than a multiple of ten.
Parameter
Enable (2.11.4.1.) (Page 220)
Multiplier (2.11.4.2.)
(Page 221)
Interval (2.11.4.3.) (Page 221)
Relay Duration (2.11.4.4.)
(Page 221)
Assigned Relay (2.11.4.5.)
(Page 221)
Relay Logic (2.11.4.6.)
(Page 221)
During the periods of low flow, the sampler may be idle for lengths of time. Program Interval
(2.11.4.3.) (Page 221) time in hours to drive the sampler. The sampler will operate based on
the volume of flow or the time interval, whichever comes first.
122
Multiplier (2.11.4.2.) (Page 221) is preset to 1 so the
default number of contacts for a pumped volume cycle
is one contact per unit of volume.
Totalizer Source
Totalizers (2.16.)
(Page 242)
Totalizers (2.7.3.)
(Page 198)
Value Description
Enabled Enables Flow Sampler Relay
4310 Click once every 4310 units
2 Sets the INTERVAL (in hours) of the relay contact,
usually long.
0.2 Sets the DURATION (in seconds) of the relay
contact, usually short.
Relay 1 Sets relay 1 to be controlled by external sampler.
Normally Closed Use (if necessary) to change the behaviour of the
relay assigned to the sampler.
Default: Normally Open
Operating Instructions, 04/2021, A5E33329501-AG
Units Source
Flowrate Units (2.15.3.7.)
(Page 238)
Volume Units (2.6.2.) (Page 186)
SITRANS LUT400