12
Display Summary of function
C--P
Function of
(
push button
The indicator may be configured to
display the input current in milliamps, or
the input current as a percentage of the
4/20mA input when the
(
push button is
operated in the display mode.
See section 6.8
tArE
Tare function
When enabled the tare function sets the
indicator display to zero when the
)
push button is operated in the display
mode.
See section 6.9
CodE
Security code
Defines a four digit numeric code that
must be entered to gain access to the
configuration menu. Default code
0000
disables this security function and allows
unrestricted access to all conditioning
functions.
See section 6.10
r5Et
Reset
Contains two sub-functions,
ConF
which
returns the indicator to the default
conditions shown in section 6.0, and
LtAb
which returns the lineariser to the
default conditions shown in section 7.4.
To prevent accidental use both resets
must be confirmed by entering
5urE
before they will be executed.
See section 6.11
6.2 Indicator function:
FunC
This configuration function defines the relationship
between the indicator’s 4/20mA input current and
the indicator’s display.
Three alternatives are
available:
5td
Standard linear relationship
root
Square root extraction
Lin
16 segment adjustable lineariser
To reveal the indicator's existing function select
FunC
from the configuration menu and press
(
.
If the function is set as required, press
)
to return
to the menu, or press the
&
or
*
button to
change the setting, followed by the
)
button to
return to the configuration menu.
5td
Linear
Provides a linear relationship between
the 4/20mA indicator input current and
the indicator display.
root
Square root extraction
Primarily intended to linearise the square
law 4/20mA output from differential
flowmeters.
For reference, the following table shows
the output current from a non-linearised
differential flowmeter.
% of full flow
Current output mA
2.5
4.01
10.0
4.16
25.0
5.00
50.0
8.00
75.0
13.00
100.0
20.00
When the root function is selected the
indicator will display flow in linear units.
Lin
16 segment adjustable lineariser
Enables non-linear variables to be
displayed by the indicator in linear
engineering units. Use of the lineariser is
described in section 7 of this instruction
manual.
6.3
Resolution:
rE5n
This function defines the resolution of the least
significant display digit.
Decreasing the display
resolution can improve the readability of a noisy
signal.
Select
rE5n
from the menu and press
(
which will reveal the current display resolution.
To change the resolution press the
&
or
*
button to select
1
,
2
,
5
or
10
digits, followed by the
)
button to enter the selection and return to the
configuration menu.
