Dwyer 275 - Manual (Page 7)

KI
1-3. Adjustment method and procedure same as dEAdZONE.
4. Push <DOWN> twice at dEAdZONE mode and KI mode is displayed.
5. Push <ENTER> at KI mode and *KI message appears on LCD.
6. Adjust KI value with <UP> or <DOWN>. Adjusted value is applied
immediately without additional operation. Users can easily check its
adjustment by changing the current input signal to the positioner.
Optimum control value is found by adjusting values during valve
operation. Push <ENTER> to save the value and +KI message
appears on LCD.
7. Push <ESC>.
8. Push <ESC> twice to return to RUN mode.
Kd
1-3. Adjustment method and procedure same as dEAdZONE.
4. Push <DOWN> three times at dEAdZONE mode and Kd mode is
displayed.
5. Push <ENTER> at Kd mode and *Kd message appears on LCD.
6. Adjust Kd value with <UP> or <DOWN>. Adjusted value is applied
immediately without additional operation. Users can easily check its
adjustment by changing the current input signal to the positioner.
Optimum control value is found by adjusting values during valve
operation. Push <ENTER> to save the value and +Kd message
appears on LCD.
7. Push <ESC>.
8. Push <ESC> twice to return to RUN mode.
HAND CAL
When auto calibration is started, Series 275 positioner set zero points
and end points based on full stroke.
Hand Calibration Types
PV_ZERO: Edit mode to change the zero point of valve.
PV_END : Edit mode to change the end point of valve.
TR_ZERO : Edit mode to change the zero point of transmitter.
TR_END: Edit mode to change the end point of transmitter.
Adjustment of valve zero point (1 to 5) and end point (6 to 10).
1. Push <ENTER> at RUN mode for 6 seconds and then AUTO CAL
mode is displayed. Push <DOWN> three times, the HAND CAL
mode is displayed.
2. Push <ENTER> at HAND CAL mode and PV_ZERO mode is
started.
3. Push <ENTER> at PV_ZERO mode and *PZ mode is started. In this
mode it is available to change valve zero point, and the valve stem
moves automatically to the current zero point. On LCD, valve stroke
is displayed as 0%. +PZ message that indicates edit mode of zero
point and inner value showing current zero point position is also
displayed.
4. Adjust valve stem by pushing <UP> or <DOWN>. When valve stem
has arrived at the desirable zero point, save it with <ENTER>. +PZ
message appears on LCD.
5. Push <ESC> to return to PV_ZERO mode.
(Push <ESC> twice to return to RUN mode.)
6. In order to change valve end point, push <DOWN> at PV_ZERO
mode and PV_END mode begins.
7. Push <ENTER> at PV_END mode and *PE mode is displayed. At
this mode it is available to change valve end point, and the valve
stem moves automatically to current end point. On LCD, the valve
stroke is displayed as 100%. *PE message indicating edit mode of
end point and inner value of end point is also displayed.
8. Adjust valve stem with using <UP> or <DOWN>. When valve stem
arrives at the desirable end point, save it with <ENTER>. +PE
message appears on LCD.
9. Push <ESC> to return to PV_END mode.
10. Push <ESC> twice and RUN mode is displayed.
(Push <DOWN> at PV_END mode to go to TR_ZERO mode).
Adjustment of zero point (1 to 4), end point (5 to 9) of transmitter.
If valve zero point and end point are changed, transmitter is also
changed automatically. Usually there is no need for the transmitter zero
point and end point to be adjusted by users, but if transmitter output
signal is unstable, transmitter zero point and end point should be
adjusted. The ammeter showing feedback signal is necessary and the
connection should be done as shown.
page 7
Feed back signal
(12 ~ 30V)
4 ~ 20 mA
INPUT
(1) Push <ENTER> for 6
seconds. (2) Push <DOWN> twice. (3) Push <ENTER>.
(4) Push <DOWN> twice. (5) Push <ENTER>. (6) Push <ENTER>
after adjustment with
<UP>, <DOWN>.
(7) Push <ESC>. (8) Push <ESC> twice. RUN MODE.
(1) Push <ENTER> for 6
seconds. (2) Push <DOWN> twice. (3) Push <ENTER>.
(4) Push <DOWN>
three times. (5) Push <ENTER>. (6) Push <ENTER>
after adjustment with
<UP>, <DOWN>.
(7) Push <ESC>. (8) Push <ESC> twice. RUN MODE.
(1) Push <DOWN>
three times. (2) Push <ENTER>. (3) Push <ENTER>.
(4) Push <ENTER>
after adjustment with
<UP>, <DOWN>.
(5) Push <ESC>. (6) Push <DOWN>.
(7) Push <ENTER>. (8) Push <ENTER> after
adjustment with <UP>,
<DOWN>.
(9) Push <ESC>.
(10) Push <ESC> twice. RUN MODE.