BEKA BA578C, Руководство пользователя, Страница: 12 / 25

Display Resolution
Low High
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C 0.1
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C
5.5 For Voltage Inputs
When the transmitter is conditioned for a voltage
input both the input voltage range and the
corresponding display must be programmed.
5.5.1 Position of display decimal point 'd.P. '
A dummy decimal point can be positioned between
any of the display digits or it may be absent.
After selecting voltage input from the 'InPut' menu,
press
P to reveal the 'd.P.' sub-menu. Press P
again to display the current decimal point position.
The decimal point can be moved or turned off by
pressing the
Up or Down push-button, followed by
E to return to the sub-menu.
5.5.2 Low input & display calibration 'In-LO'
This function defines the lower voltage input and the
corresponding transmitter display. See example
below:
Input Transmitter
mV Display
-10.00 -3.000 Low input / display
12.55 3.765 High input / display
The calibration is performed using the internal
references and may be made with any transmitter
input voltage.
Select 'In-LO' from the menu and press P which will
access a sub-menu containing two functions 'InPut'
and ''dISP'.
Select the input voltage 'InPut' and press P which
will cause the specified lower input millivoltage to
be displayed in the form XX.XX The flashing digit of
the input voltage can be changed by pressing the
Up or Down buttons. When the first digit is correct,
pressing P will transfer control to the next digit.
When the least significant digit has been adjusted,
press
E to return to the 'InPut' prompt, from which
the display prompt 'dISP' can be selected by
pressing the
Up or Down button.
Pressing P will reveal the transmitter display
corresponding to the specified low input voltage.
The position of the dummy decimal point will be as
defined by function 'd.P.' - see section 5.5.1
The flashing digit of the display can be changed by
pressing the
Up or Down buttons. When the first
digit is correct, pressing P will transfer control to
the next digit.
When the least significant digit has been adjusted,
press
E to return to the ''dISP' prompt.
5.5.3 High input & display calibration 'In-HI'
This function defines the higher voltage input and
the corresponding transmitter display.
See example below:
Input Transmitter
mV Display
-10.00 -3.000 Low input / display
12.55 3.765 High input / display
The calibration is performed using the internal
references and may be made with any transmitter
input voltage.
Select 'In-HI' from the menu and press P which will
access a sub-menu containing two functions 'InPut'
and ''dISP'.
Select the input voltage 'InPut' and press
P which
will cause the specified higher input millivoltage to
be displayed in the form XX.XX The flashing digit of
the input voltage can be changed by pressing the
Up or Down buttons. When the first digit is correct,
pressing P will transfer control to the next digit.
When the least significant digit has been adjusted,
press
E to return to the 'InPut' prompt, from which
the display prompt 'dISP' can be selected by
pressing the
Up or Down button.
Pressing P will reveal the transmitter display
corresponding to the specified higher input voltage.
The position of the dummy decimal point will be as
defined by function 'd.P.' - see section 5.5.1
The flashing digit of the display can be changed by
pressing the
Up or Down buttons. When the first
digit is correct, pressing P will transfer control to
the next digit. When the least significant digit has
been adjusted, press
E to return to the ''dISP'
prompt.
5.6 4/20mA output current calibration 'CAL'
This sub-menu defines the relationship between the
transmitter display and the 4/20mA output current.
The transmitter output current is derived from the
transmitter display and will change if the display
calibration is changed. 'ZEro' defines the display
at which the output is 4mA, and 'SPAn' the display
at which the output is 20mA.
To calibrate the output current select 'CAL' from the
programme menu and press
P which will access a
sub-menu containing two functions. Select 'ZEro'
and press
P which will show the transmitter display
at which the output current is 4mA.
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