Dwyer 295 - Manual (Page 7)

KP
1-3. Adjustment method and procedure same as dEAdzone.
4. Push at dEAdZONE mode and KP mode is displayed.
5. Push and *KP message appears on LCD.
6. Adjust KP values with or . 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.
7. Push to save the value. +KP message appears on LCD.
8. Push .
9. Push twice to return to RUN mode.
PT
1-3. Adjustment method and procedure same as dEAdZONE.
4. Push 7 times at dEAdZONE mode and PT mode is displayed.
5. Push at PT mode and *PT message appears on LCD.
6. Adjust PT value with or . 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
the values during valve operation. Push to save the value and +PT
message appears on LCD.
7. Push .
8. Push twice to return to RUN mode.
HAND CAL
When auto calibration is started, Series 195 and 295 positioners 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 a 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 at RUN mode for 6 seconds and the AUTO CAL mode is
displayed. Push three times, and the HAND CAL mode is displayed.
2. Push at HAND CAL mode and PV_ZERO mode is started.
3. Push at PV_ZERO mode and *PZ mode is started. At this mode it is
available to change valve zero point, and the valve stem moves automatically to the
current zero point. On LCD, the 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 or . When valve stem has arrived
at the desirable zero point, save it with . +PZ message appears on LCD.
5. Push to return to PV-ZERO mode. (Push twice to return to RUN
mode.)
6. In order to change valve end point, push at PV_ZERO mode and
PV_END mode begins.
7. Push 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 100%. *PE message
indicating edit mode of end point and inner value of end point is also displayed.
8. Adjust valve stem with using or . When valve stem arrives at
desirable end point, save it with . +PE message appears on LCD.
9. Push to return to PV-END mode.
10. Push twice and RUN mode is displayed.
Adjustment of zero point (1 to 4) and 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 down as shown.
1. Push at PV-END mode and then TR_ZERO mode is displayed.
2. Push . *R_ZERO mode is started and at this mode users can adjust
the zero point of the transmitter. Valve stem is moved to zero point automatically.
3. Push or . The number on the LCD is changed and the measured
current value is changed accordingly on an ammeter equipped outside. Adjust it to
be 4 mA and push to save it. +R_ZERO message is displayed.
4. Push . TR_ZERO mode is displayed.
5. Push at TR_ZERO mode. Then TR_END mode is displayed. (Push
twice to return to RUN mode.)
6. Push . *TR_END mode is started and at this mode users can adjust
the end point of the transmitter. The valve stem is moved to the end point
automatically.
7. Adjust measured current value to be 20 mA on ammeter with or
buttons. Push to save it. +R_END message appears.
8. Push . TR-END mode is displayed.
Feed back signal
(12 ~ 30V)
4 ~ 20 mA
INPUT
Page 7
3 times
/
then 3 times
COMPLETED
7 times
/
then 3 times
COMPLETED
6 seconds 3 times
/
then
/
then
COMPLETED
/
then
/
then
COMPLETED