BEKA BA324ND, Manual

14

7.2  Using the internal references

As in 7.1 the BA324ND is required to display:

-50.0

with a 4mA input

1050.0

with a 20mA input

from a linear transducer.  Maximum display
resolution is required, the frequency of the mains
supply is 50Hz and the existing security code is
1209.    In the operating mode the indicator is
required to display the input current in milliamps
when the P push-button is operated.

This example assumes that the internal references
have been routinely calibrated.

Step1

Enter the programming mode

With an input current between 4 and
20mA put the indicator in the
programming mode by simultaneously
pressing 

P

 and 

E

.  The indicator will

respond by displaying 'COdE'.  Press

P

  to clear this prompt and set the

display to the security code 1209
using the 

Up

, 

Down

 and 

P

 push-

buttons. Pressing 

E

 will enter the

code, and after a few seconds during
which the decimal points will be
scrolled, the first parameter 'root' in
the main menu will be displayed.

Step 2

Square root extractor

With 'root' displayed, press 

P

    which

will reveal the root extractor status.
The root extractor can be turned on or
off by the 

Up

 or 

Down

 buttons.  Select

'OFF', and press 

E

 to return to the

main menu.

Step 

3

Select frequency of maximum
mains (line) rejection

Scroll though the main menu until
'Cond' is displayed.  Enter the sub-
menu by pressing 

P

 twice and select

the 'FrE' function.  Using the 

Up

 or

Down

 buttons select '50',  and then

press 

E

  twice to return to the main

menu.

Step 4

Define function of P push-button

Select 'C--P' from the main menu and
press 

P

 to reveal the function of the 

P

button in the display mode.  Select  '4-
20' and return to the main menu by
pressing 

E

.

Step 5

Position dummy decimal point

Select 'd.P' from the main menu and
then press 

P

.  Using the 

Up

 and

Down

 push-buttons position the

dummy decimal point in front of the
least significant digit.
Press 

E

 to return to the main menu.

Step 6

Calibrate display

With any input current between 4 and
20mA select 'SEt' from the main menu
and press 

P

.   The indicator will

display 'ZErO' in the sub-menu; press

P

 to reveal the existing zero display.

Using the 

Up

, 

Down

 and 

P

 push-

buttons enter the required zero
display of  -50.0   Press 

E

 to return to

the 'ZErO' prompt.

Again with any input current between
4 and 20mA press the 

Up

 push-button

and the indicator will display 'SPAn'.
Press 

P

 to reveal the existing span

display.  Using the 

Up

, 

Down

 and 

P

push-buttons enter the required span
display of  1050.0  Press 

E

 to return

to the 'SPAn' prompt. Press 

E

 again to

return to the main menu.

Step 7

Return to display mode

Following completion of calibration
return to the display mode by pressing

E

.