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Summary of Contents for YOKOGAWA MLD
- Page 1 User’s Model MLD Manual Loop Powered Process Indicator IM 61A01A01-01E-A IM 61A01A01-01E-A 4th Edition...
- Page 2 1. PREFACE The Model MLD field mounted indicator receives a DC current signal from electronic transmitters and indicates process measurement values. This instruction manual gives instructions on handling, mounting, and wiring of the MLD indicator. 2. MODEL CODE AND SPECIFICATIONS...
- Page 3 DIMENSIONS 3. INSTALLATION The Loop Powered Indicator can be mounted on a wall or a 2” pipe. The housing is a NEMA 4X Explosion Proof housing so it can be mounted outside in the field. Do not install the unit in the following conditions: •...
- Page 4 Twisted pair shielded cable is recommended. The following is an example of the MLD Loop Indicator connected to an EJA Pressure Transmitter (Note: The EJA Transmitter below can be replaced with any 4-20mA 2 wire device.) The Loop Indicator is available in FM Explosion Proof and CSA Explosion Proof types for hazardous locations.
- Page 5 MOUNTING IN HAZARDOUS LOCATIONS IM 61A01A01-01E-A...
- Page 6 5. CALIBRATION Calibration of MLD Units (1) The MLD model ships with a calibration range of 0-100% unless ordered with the /ENG Engineering Units option. (2) If adjustments are needed the 2 screws holding the plate will need to be removed (3) Connect unit to a Current Standard (red to +, black to -).
- Page 7 6. ROTATING DISPLAY DIRECTION The loop indicator display is designed so that it can be rotated in 90 degree increments. This is accomplished by ordering the unit as a horizontal pipe mount or a vertical pipe mount. However there may be the need for the customer to change the angle of the display. The following are procedures for the display rotation: Display Rotation: (1) Remove power from the unit.
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