Introduction To [Hf] Menu Item; Using The [Hf] Menu Item - Siemens SITRANS F Instruction Manual

Section 2

Introduction to [HF] Menu Item

All Sitrans F 1010 flowmeters with version 3.01.02 and later operating systems include a new Diagnostics
Menu item that permits the entry of a flow registration correction parameter labeled [HF]. This "HF"
parameter is the input for a proprietary algorithm which automatically compensates for signal beam
blowing in pipes utilizing either 1011 clamp-on or insert transducers, thereby extending the upper flow
limit of all Sitrans F 1010 flowmeters. This algorithm provides the most benefit for clamp-on gas meters
where high flow velocities and low sound velocities create the most challenging conditions for digital
signal processing routines.

Using the [HF] Menu Item

Two methods for adjusting this parameter are provided via the [HF] menu cell, located within the
"Diagnostics / Site Setup" submenu. The "Manual" method provides direct entry of this parameter and
is primarily intended for the advanced user, whereas the "Automatic" method allows the FUE1010EN
flowmeter to automatically measure the required correction and install the parameter.
Guidelines for using the [HF] menu item are described below:
This menu is only accessible for the transducer channels, not the virtual (average flow) channel
z
of the flowmeter. (i.e., Diagnostics Path 1 or Path 2, but not Path 1 & 2).
The FUE1010EN flowmeter will inhibit the "Automatic" installation of the [HF] parameter if the
z
flow rate is insufficient (too low) to accurately measure the required correction. If the maximum
flow rate for the application is relatively low then this correction should not be required.
If the flow rate is very high and the flowmeter is reporting erroneous or unstable flow, then the
z
flowmeter may already be having trouble resolving the upstream and downstream signals. In
this event, it may be necessary to first lower the flow rate to a moderate level before performing
the "Automatic" HF adjustment. Once this is done the flowmeter should be able to properly
measure the highest flow rates without problems.
The limits of the "HF" parameter are +/- 0.7 and any attempt to manually install a larger value
z
will cause the flowmeter to abort the installation of the parameter.
NOTE: Pressing the <Left Arrow> at any stage prior to accepting the measured value will abort
the installation and return to the previous setting.
To access this [HF] menu item proceed as follows:
At the [Meter Type] Menu, press the <Right Arrow> and then <ENT> to select the desired Path
z
(e.g., Dual Path Flow).
In the [Dual Path Energy] Menu, press the <Down Arrow> and scroll to the [Diagnostic Data]
z
menu cell. Press the <Right Arrow> to select it.
2-73
1010ENFM-3B