PN25080 Converter 4 - 1
TRIO-WIRL INSTRUCTION MANUAL
CHAPTER 4 Converter
4.1 General
The TRIO-WIRL flow metering system is designed as a
2-wire instrument, i.e. the supply power and the current
output signal (4-20 mA) both use the same pair of con-
nection leads.
Two converter mounting versions are available, integral
( models ST/VT) and remote (models SR/VR).
INTEGRAL
The TRIO-WIRL VT/ST models are supplied with an
integrally mounted microprocessor-based signal con-
verter as shown in Figure 4-1. The converter uses
state-of-the-art Digital Signal Processor (DSP) technol-
ogy for superior flow and vibration noise immunity. This
combination of flowmeter and electronics allows maxi-
mum flexibility for on-site calibration and maintenance.
Database interrogations and changes at the flowmeter
may be performed using the three pushbuttons or by
activating three magnetic switches using a magnetic
"stick". The two line, 16 character LCD display permits
continuous monitoring of the flow rate and totalizer
using multiplexing, if desired.
REMOTE
The TRIO-WIRL VR/SR models (Figure 4-2) are based
on the VT/ST converter technology and include all the
options available in the VT/ST models. The difference
is that the converter is mounted remotely from the flow-
meter primary when the primary is installed in a loca-
tion difficult to access. The converter may be either
wall-mounted or pipe-mounted (pipe-mounting hard-
ware is shown in Figure 4-3).The remote design also
offers advantages when the ambient conditions at the
flowmeter primary are extreme. The maximum distance
between the converter and the flowmeter primary is 10
meters. A special cable is supplied with the meter to
interconnect the flowmeter primary and the converter
and is permanently attached to the converter.
FIGURE 4-1 INTEGRAL TRIO-WIRL MODEL VT
.
FIGURE 4-2 REMOTE TRIO-WIRL MODEL VR
FIGURE 4-3 VR/SR PIPE-MOUNT BRACKET
To Next Page
Loading...
Need help?
General
