Emerson 3812 User Manual

3-9000-765 Rev D

March 2013

PC

Personal Computer

PFC

peripheral field connection (board)

P/N

part number

PS

power supply (board)

psi

pounds per square inch (pressure unit)

psia

pounds per square inch absolute (pressure unit)

psig

pounds per square inch gage (pressure unit)

R

Radius

rad

radian (angle)

RAM

Random Access Memory

Remote Mount Option

Detaching the transmitter electronics enclosure and base electronics enclosure 

from meter body and mounting and affixing them with the mounting bracket to a 

pole or other structure.

RTS

Request-to-Send; the RS-232C handshaking signal output by a receiver when it is 

ready to receive data

RTU MODBUS

A Modbus protocol framing format in which elapsed time between received charac-

ters is used to separate messages. RTU stands for Remote Terminal Unit.

s

second (time unit, metric)

SDRAM

Synchronous Dynamic Random Access Memory

sec

second (time unit, U.S. Customary)

TCP/IP

Transmission Control Protocol/Internet Protocol

time_t

seconds since Epoch (00:00:00  UTC Jan.  1,  1970) (time unit)

UDP

User Datagram Protocol

U.L.

Underwriters Laboratories, Inc. - product safety testing  

and certification organization

V

volts (electric potential unit)

W

watts (power unit)