Smart Positioner
YT-1000 / 1050 series
Product Manual
Ver. 1.04
57
7.6
Orifice Installment
If the actuator size is too small relative to the flow rate of positioner, hunting can occur. In
order to avoid hunting, the orifices can be installed in the outports.
1. Separate the pilot unit from the positioner.
2. Separate the o-rings from out1 and out2 ports, and insert the orifices. Before re-
assemble the o-rings, please make sure there is no remaining dust or particles on the
ports.
3. Standard diameter of the orifice hole are 1mm. 2mm diameter orifice can be ordered.
Fig. 7-14: Installing orifices
7.7
Reset
– Potentiometer
External damage or physical shock can dislocate potentiometer factory setting.
Potentiometer must be re-calibrated when dislocation of the potentiometer or after cam
adjustment. Please refer below instructions and figures.
1. Please set actuator position to 50% of the valve stroke. Please make sure that the
actuator does not move during the re-calibration.
2. In the junction box, Please pull out the potentiometer cable connector form potentiometer
PCB. Do not pull out with too much force as wires can be damaged.
3. On the potentiometer cable connector, there are three holes. Out of three holes, please
measure resistance level by plugging two hole (one of right or left and one of center)
using a resistance tester. The potentiometer resistance level should be within 0 ~ 10
KΩ
(Rotary positioner) and within 0 ~ 5
KΩ (Linear Positioner) during full stroke of the
actuator.
4.
Using “+” screw driver, loosen potentiometer stopper bolt. Do not loosen completely.
5. Pull out the potentiometer a little and gear of the potentiometer will be separated from
main shaft gear. This will make user to turn the gear of the potentiometer.
6. Since current actuator position is 50% of the valve stroke, the resistance level should be
measured around 5K
Ω (4.8~5.2KΩ) at rotary positioner and 2.5KΩ (2.4~2.6KΩ) at linear
positioner by turning gear of potentiometer.
7. After the setting, assemble back the stopper and the bolt.
Содержание YT-1000 series
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Страница 19: ...Smart Positioner YT 1000 1050 series Product Manual Ver 1 04 19 2 7 3 YT 1000R 2 7 4 YT 1000R SPTM Internal ...
Страница 20: ...Smart Positioner YT 1000 1050 series Product Manual Ver 1 04 20 2 7 5 YT 1000R Limits Switch Internal ...
Страница 27: ...Smart Positioner YT 1000 1050 series Product Manual Ver 1 04 27 2 8 10 YT 1000R External SPTM with LCD ...
Страница 28: ...Smart Positioner YT 1000 1050 series Product Manual Ver 1 04 28 2 8 11 YT 1000R External Limit Switch ...