3410 Series Gas Ultrasonic Meters Operations Manual
Section 5: Calibrate and configure the meter
3-9000-777 Rev E
January 2018
Configure Frequency outputs
61
5.5
Configure Frequency outputs
The Frequency Outputs allows you to configure the available frequency outputs for the meter. If
you previously configured one or more Frequency/Digital outputs make selections for the
following parameters.
•
Content:
–
Valid outputs are based on Uncorrected (Actual) flow rates or on Corrected
(Standard) flow rates. If pressure or temperature is set to Not used, or the Base
condition correction is cleared on the Startup Page, the Corrected (Standard)
option will not be available.
–
Daniel Gas Ultrasonic meters will also allow you to set the outputs for Average Flow
Velocity, Average Sound Velocity, Energy Rate, and Mass Rate.
•
Direction:
–
Reverse: The output only reports flow in the reverse direction. For frequency
outputs, Phase B of the output is 90 degrees out of phase with Phase A.
–
Forward: The output only reports flow in the forward direction. For frequency
outputs, Phase B of the output is 90 degrees out of phase with Phase A.
–
Absolute: The output reports flow in both directions. For frequency outputs, Phase
B of the output is 90 degrees out of phase with Phase A.
–
Bidirectional: The output reports flow on Phase A only in the forward direction and
on Phase B only in the reverse direction.
•
Maximum frequency output:
–
Valid frequency output options are 1000 Hz and 5000 Hz
The following fields are used to configure the frequency outputs selected to output a volumetric
flow rate. The fields are only enabled if the associated output’s
Content
is set to Uncorrected
(Actual) or Corrected (Standard).
•
Full scale volumetric flow rate used with output:
–
Enter the flow rate to be equivalent to the maximum frequency of the frequency
output. This property is disabled if Frequency outputs was cleared on the
Startup
Page
.
•
K-factor - A read-only value showing the calculated K-factor from the Full scale volumetric
flow rate used with frequency outputs and the Maximum frequency for frequency output.
This property is disabled if Frequency outputs was cleared on the Startup Page.
•
Vol/pulse - A read-only value showing the calculated inverse of the K-factor. This property
is disabled if Frequency outputs was cleared on the
Startup Page
.
•
Velocity
–
Maximum scale velocity used with output: Enter the velocity to be equivalent to the
maximum frequency of the frequency output. These values are only enabled if the
Content is set to Average flow velocity or Average sound velocity. This property is
disabled if Frequency outputs was cleared on the
Startup Page
.
–
Minimum scale velocity used with output: Enter the velocity to be equivalent to the
minimum frequency (i.e. 0Hz) of the frequency output. These values are only
enabled if the Content is set to Average flow velocity or Average sound velocity. This
property is disabled if Frequency outputs was cleared on the
Startup Page
.
