BEKA BA337E, Руководство пользователя

Страница: 21 / 61

6.4 Rate Totaliser function:
FunCtion
The Rate Totaliser contains an adjustable sixteen
segment lineariser which may be used to compensate
for flowmeter non-linearity.
This function turns this
lineariser
on
or
off
.
5td
Lineariser not activated
Lin
Lineariser activated
To reveal the existing Rate Totaliser function select
FunCtion
from the configuration menu and press
(
.
If the function is set as required, press
)
to return to
the configuration menu, or press the
&
or
*
button
to change the setting, followed by the
)
button to
return to the
FunCtion
prompt in the configuration
menu.
5td
Linear
Provides a linear relationship between the
pulse input and the Rate Totaliser displays.
Lin
16 segment adjustable lineariser
Enables a sixteen segment adjustable
lineariser. When
Lin
is selected the
FACtor
function is expanded to allow up to 16 values
to be entered for different input pulse
frequencies.
Detailed information about the
lineariser including configuration is contained
in section 7 of this instruction manual.
6.5 Input:
inPut
The Input function contains two sub-functions
inP . tYPE
and
dEbounCE
which configure the Rate
Totaliser input and input noise rejection.
6.6 Input type:
inP . tYPE
inP . tYPE
is a sub-menu in the
inPut
function which
defines the type of flowmeter or input pulse that the
Rate Totaliser will count. To check or change the type
of input, select
inPut
in the main configuration menu
and press
(
which will reveal the
inP . tYPE
prompt,
pressing
(
again will show the Rate Totaliser input
.
If set as required press
)
twice to return to the
configuration menu, or repeatedly press the
&
or
*
button until the required type of input is displayed,
then press
)
twice to return to the configuration
menu.
One of following six types of input may be selected:
Switching
thresholds
Low High
oP,CoL
Open collector
2
2 10k Ω
VoLt5 L
Voltage pulse low
1
1 3V
VoLt5 H
Voltage pulse high
1
3 10V
CoiL
Magnetic pick-off 0 40mV
Pr . dEt
Proximity detector
2
1.2 2.1mA
ContACt
Switch contact
2
100 1000 Ω
Notes:
1. Maximum voltage input +30V.
2. For flowmeter transducers that require
energising i.e. proximity detectors, switch
contacts or open collectors, terminals 3 & 4 of
the Rate Totaliser should be linked together.
3. To count correctly, the input pulse must fall
below the lower switching threshold and rise
above the higher switching threshold.
4. See section 6.7 for maximum counting
frequency.
21