Meter Types - Options; Figure 2: Highlights Of Meter Features - Honeywell RMA300-ME User Manual

That is, the explosion-proof housing may be located
- at the end of a wiring run for the transmitter loop, or
- between the transmitter and the receiver devices.
This manual includes several sets of Honeywell-certified engineering drawings that specify RMA 3000
configurations and conditions that are approved for use in hazardous environments by various approval
agencies (FM, CSA, and LCIE (ATEX). Each of these drawings shows a configuration similar to that
shown in Figure 1; that is, a single meter connected remote from a single transmitter.
In some selected cases (such as operation in non-hazardous locations), it is possible to connect more than
one meter to a given transmitter. In these cases, the additional meter(s) may be placed either at the end of a
wiring run, or at any location between the transmitter and other elements of the Remote Meter Assemblies
configuration.
The number of meters that may be incorporated depends on the circuit configuration and on electrical
characteristics of associated equipment. For more information regarding the use of multiple remote meters
with a single transmitter, refer to the descriptions under the heading Multiple Remote Meters.

Meter Types - Options

Remote Meter Assemblies provide for two meter types. The features of each are highlighted in Figure 2,
and are described after the figure below.
ME – Analog Meter
Function - The ME is an analog device that functions as an output indicator for any transmitter that
operates in the 4-20 mA current mode.
Application - The ME can be used as a Remote Meter Assembly component with any one of the
following SmartLine transmitters operating in the analog (4 to 20 mA) mode.
Electrical Characteristics – The ME is an electromechanical device of the D'Arsonval type. That is,
the current passing through a coil in the meter is used to deflect a needle to indicate the magnitude of the
current, where a current of 4-20 mA represents 0% to 100%.
The ME can be used in combination with the SM in the same loop, provided that the formula presented
under the SM description above in electrical characteristics for multiple meters is obeyed.
Release 8

Figure 2: Highlights of Meter Features

RMA 3000 Remote Meter Assemblies User Manual 9