User Manual For - CONTROLLER/DATA RECORDER MultiCon CMC-99/141
state will be displayed in the logical channel, but the actual flow value will still be
used in the total flow calculation,
–
High limit
– the value which determines the measured current, above which the
Hi
state will be displayed in the logical channel, but the actual flow value will still be
used in the total flow calculation,
–
Totalizer configuration
– submenu which contains totalizer settings,
•
Reset now
– manual reset of the totalizer,
•
Reset mode
– turns on and off reset from the logical channel,
•
Reset source
– allows to choose a logical channel from the list, which will reset
the totalizer, when the value in this channel is greater than 0,
•
Hold mode
– turns on and off the total flow calculating from the logical channel,
•
Hold source
– allows to choose a logical channel from the list, which will hold
the total flow calculating in the totalizer (this does not reset the totalizer and
does not stop the flow measurement); the total flow calculating is held when the
value in this logical channel equals or is lower than zero,
•
Counting direction
– turns on and off change of the counting direction,
•
Direction source
– allows to choose a logical channel from the list, which will
change the counting direction; the counting direction will change when the value
in this channel is greater than 0,
An example of the total flow configuring and displaying is shown in chapter
Application of Logical channel in the Hardware input mode and Data from other
channel for FT4 module
7.9.5.5.
Pulse flowmeter modules
The
FT
modules are equipped with two or four pulse flowmeters and the same number
of current inputs, see
Appendices 8.5. FI2. FI4, FT2, FT4 – FLOWMETER MODULES
. Pulse
flowmeters are used to liquids, gases and bulk materials flow measurement, based on pulses
from the sensor and calculating the total flow in a selected channel. Each pulse channel is
equipped with counting inputs:
Inp[n]1
,
Inp[n]2
and common ground
COM[n]
. All pulse
channels are galvanically separated from the device and from each other.
The user can, thanks to the
Scaling
parameter in the Logical channel, see chapter
7.8.1. Logical Channels - General settings
, interpret the amount of pulses received by the
device at its discretion, which allows to cooperate with any kind of pulse sensors.
Current inputs are used to current measurement in typical ranges (0÷20 mA; 4÷20mA)
and to facilitate their connection, they are grouped and they have a common ground, but they
are isolated from the supply voltage and other modules.
The pulse flowmeter parameters are:
–
Name
– each built-in input already has a name given by the device and the user
cannot change it, for the description of the
Name
–
Unit
– parameter which displays the time base of the measurement,
–
Base unit
– defines the unit which is used by the totalizer (for example when the flow
measurement unit is m
3
/s, the base unit is m
3
) ,
–
Mode
– defines the time base which is used during the measurement (pulses per
second, pulses per minute, pulses per hour),
–
Low limit
– value which determines the amount of pulses, below which the
Lo
state
will be displayed in the logical channel, but the actual flow value will still be used in
the total flow calculation,
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