Michell Instruments Easidew PRO, Руководство пользователя

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I.S. Field Display User’s Manual
14 97321 Issue 2.3, May 2016
OPERATION
3.1.6 Re-Range Display or Calibrate Using Internal Reference: ‘
SEt
’
Using the
SEt
function the I.S. Field Display can be calibrated without the need to know
the value of the 4-20 mA input current, or to disconnect the instrument from the 4-20
mA loop.
When using the
SEt
function the I.S. Field Display’s internal reference is used to simulate
a 4 mA and 20 mA input current.
ZEro (Zero)
is the display with a simulated 4 mA input
SPAn (Span)
is the display with a simulated 20 mA input
To calibrate the I.S. Field Display:
ZEro
1. To adjust at 4 mA input select
SEt
from the Con fi guration Menu and press
P
. The instrument will display
ZEro
.
2. Press
P
again to reveal the current display at 4 mA.
3. The fl ashing digit can be adjusted by pressing

or

.
4. When the fl ashing digit is correct, press
P
to transfer control to the next
digit.
5. When all the digits have been adjusted, press
E
to return to the
ZEro
prompt.
SPAn
6. To adjust at 20 mA, press

from the
ZEro
prompt which will cause the
instrument to display
SPAn
.
7. Press
P
to reveal the instrument's existing display at 20 mA.
8. The fl ashing digit can be adjusted by pressing

or

.
9. When the fl ashing digit is correct, press
P
to transfer control to the next
digit.
10. When all the digits have been adjusted, press
E
to return to the
SPAn
prompt
11. Press
E
to return to the
SEt
prompt in the Con fi guration Menu.
3.1.7 Function of the P Push-Button: ‘
C - - P
’
When the I.S. Field Display is in the display mode, pressing
P
will display the input
current in milliamps, or the displayed value as a percentage of the difference between
the displayed values at 4 mA and 20 mA inputs.
To check or change the function of the
P
button, select
C - - P
from the Con fi guration
Menu and press
P
to reveal the current setting. Pressing

or

will toggle the setting
between
4-20
(the current display in milliamps) and
PC
(the percentage display). When
set as required, press
E
to return to the
C - - P
prompt in the Con fi guration Menu.