PD663 Loop-Powered Meter
Instruction Manual
25
Signal Input Conditioning Function (
Fnc
)
The PD663 provides linear and squar root signal input conditioning functions for
inputs from linear and non-linear transmitters.
Linear (
Lnr
)
Meters are set up at the factory for linear function using two-point linearization.
Multi-point linearization with up to 32 points may be used. The linear function
provides a display that is linear with respect to the input signal between each set
of input points.
Square Root (
sqr
)
The square root function is used to linearize the signal from a differential
pressure transmitter and display flow rate in engineering units.
Information Menu (info)
The
Information
menu is located in the
Advanced
features menu, to access
Information
menu see Advanced Features Menu, page 23.
It shows software identification number, version number, and calibration
temperatures. To determine the software version of a meter:
Go to the
Information
menu (
info
) and press
Enter
button.
The meter will automatically scroll through the software release number and
software version. The meter temperatures at the time of last internal calibration in
°
C and
°
F are displayed for calibration troubleshooting. Pressing the
Enter
,
Right
, or
Up
buttons will progress the information display.
Following the information display, the meter will exit the
Advanced
features menu
and return to run mode.
Input Signal Filter (
FIL
)
The noise filter is available for unusually noisy signals that cause an unstable
process variable display. The noise filter averages the input signal over a certain
period. The filter level can be set to low (
LO
), high (
HI
), or off (
OFF
). The higher
the filter setting, the longer the averaging time and so the longer the display may
take to find its final value.
The filter contains a noise filter bypass feature so that while small variations in
the signal will be filtered out, large, abrupt changes to the input signal are
displayed immediately.
