Section 6: Mdpi And Potentiometer Gear Box P/N 1030; Description; N Number; Calibration - Emerson EIM 2000 Series Installation And Maintenance Manual

Section 6: MDPI and Potentiometer Gear Box P/N 1030

August 2017
Section 6: MDPI and Potentiometer Gear Box
6.1

Description

Mechanical Dial Position Indicator, MDPI, Part No. 1030 is a precision assembly of gears,
shafts, bearings and slip-clutch designed to drive Position Indication arrow and/or
Potentiometers. The MDPI is geared to actuator mechanism and is "in-step" with the valve
position at all times, whether operation is by motor or handwheel. MDPI is mounted to
the top of Limit Switches; this allows addition of potentiometer to valve actuators that
are determined later to require process control. Top mounting allows for moving valve
actuator from one valve to another.
Figure 13
6.2

N Number

N is the total number of Gear Limit Pinion turns for full valve travel.
Pinion is Part No. (17) on assembly drawings.
6.3

Calibration

MDPI & POT Drive is calibrated after LSC and LSO are properly set.
See Section 4 - Geared Rotary Limit Switch Setting Instructions.
16
P/N 1030
Installation and Maintenance Manual
E2K-401-0817 Rev. 1
MDPI and Potentiometer Gear Box P/N 1030