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Instrument Calibration
40
515 HC04 - 8 June 2007
Output Pulse Factor
Increasing the output pulse width reduces the maximum frequency at which
a total variable can be retransmitted. Pulses will be missed if the output
cannot “keep up” with the rate of total counts. You can use the output pulse
factor to ensure that this maximum is not reached.
The maximum pulse output frequency is determined by:
PULSE
OUT
n The Output Pulse Factor is available for viewing and editing only when
the assigned variable is a total (pulse output) type.
The Output Pulse Factor is the scaling factor for the retransmission of the
measured total quantity.
For example, if “volume” is chosen as an output variable and engineering
unit is cubic metres, then a pulse factor of 1.000 generates one pulse for
1m
3
. Similarly, a pulse factor of 3.000 generates one pulse for 3m
3
.
For more information, see
The output pulse factor cannot be 0 (zero).
PT-MIN
OUT
n
PT-MAX
OUT
n
The Output Minimum Point and Maximum Point are available for
viewing and editing only when the assigned variable is a rate (4-20mA
output) type.
The output minimum value corresponds to the 4mA point and the output
maximum value corresponds to the 20mA point.
Setting the output range differently from the input range enables the
instrument to amplify the input signal. You can drive a chart recorder that
“zooms in” on a specified range of values instead of displaying the full
operating range of the transducer.
For example, if “volume flow” is chosen as an output variable and
engineering unit is cubic metres per minute, then setting the minimum
point to 30 and the maximum point to 100 would reflect the volumetric
flow rate range of 30 to 100m
3
/min. At rates above the maximum and
below the minimum points, the output remains at 20mA and 4mA
respectively.
↓
→
UNITS PARAMS INPUTS
OUTPUTS
ALARMS COMMS TM/LOG SETUP TEST END
SET
1000
2
pulse width in ms
×
(
)
--------------------------------------------------------Hz
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