22
YT-3300/3301 series
5.2
Auto/Manual Switch (A/M Switch)
Auto/Manual Switch allows the positioner to be functioned as by-pass. If switch is set as
Auto, the positioner will operate per input signal. If switch is set as Manual, the positioner
will send supply pressure directly to the actuator.
5.3 Variable
Orifice
Adjustment
Positioner can cause hunting with extremely small size of
the actuator. To adjust flow rate to the actuator, variable
orifice can be inserted. The sizes of orifice are 1 pie and
2 pie.
5.4 Option
PCB
Adjustment
By adding option sub-pcb, the positioner can have options. There are 3 types of sub-pcb’s
HART only
PTM only
PTM + HART
Installation Steps
1. Open the cover and remove the main PCB from the positioner.
2. Mount support PCB and plug sub-PCB into main PCB connector.
.
** Option Jumper must be removed, when HART option included sub-PCB is being mounted.
Option Jumper
