FujiFilm PXG4, Operation Manuals

Page: 35 / 158

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4
Chapter
Dead Band
Cooling proportional band shifts with the setting value as
shown below.
"
ddd
dbbbb
" is called dead band when the value is positive and
overlap band when the value is negative.
• Range: -50% to 50%
"
ddd
dbbbb
" is measured as a percentage of MV and can be
converted to a percentage variation by the following formula.
DB [%] = variation x [%]
Example: Proportional Band (P) = 5.0%, with a desired dead
band of 1% variation from SV:
DB [%] = 1.0 x = 20 [%]
Dead band = 20 [%]
Setting Dead Band
overlap
band
dead band
MV
output
cooling
heating
MV
MV=50%
100
P
100
5.0
1
Press and hold the key to display the setup
mode channel menu ("
ooo oPPPPEEEE CCCChhhh 1111
"), then use the
keys to display Pid ("
PPP
Piiiidddd CCCChhhh 2222
").
Refer to
See p. 31 in this chapter for information on how to display
the channel menu.
2
Press and hold the key to display P ("
PPP P
"), then
use the keys to display db ("
ddd dbbbb
").
Sets the dead band.
3
Press the key, then use the keys to set
the cooling dead band to "1.5".
The cooling dead band is set to "1.5%".
4
Press the key to confirm the setting.
5
Press the key to return to the operation mode
PV/SV display.