www.miinet.com
Moore Industries-International, Inc.
- 6 -
User’s Manual
238-741-00K
May 2019
Programmable Smart HART Temperature Transmitter
THZ
3
/ TDZ
3
SECTION 1
Section 1 - Introduction
The Moore Industries’ THZ
3
/TDZ
3
is the next generation of the THZ
2
/TDZ
2
. The THZ
3
/TDZ
3
provides all the same capabilities as the THZ
2
/TDZ
2
with additional support for 2 sensors, new
measurement modes (backup, average, high select/low select and differential) and advanced
device intelligence.
This is the user’s manual for Moore Industries’ THZ
3
/TDZ
3
Programmable Smart HART
Temperature Transmitters. It contains all of the information needed to configure, install, operate
and maintain the instruments.
Overview
The THZ
3
/TDZ
3
has the ability to accept one or two sensor inputs. The variables of the
THZ
3
/TDZ
3
can be configured as either sensor 1, sensor 2, average, differential, backup,
low or high select. In backup mode, the THZ
3
/TDZ
3
automatically switches to the secondary
sensor input if the primary sensor fails; either sensor can be selected as the primary sensor.
This substantially increases the overall reliability of the measurements. Upon switching to the
secondary sensor, an alert is available via the HART “Additional Status” diagnostic bit and is also
sent to the TDZ
3
display. If a sensor fault occurs when not in backup mode, the THZ
3
/TDZ
3
can
be configured to drive the analog output upscale, downscale, to a preset value or will hold last
output.
The THZ
3
/TDZ
3
has enhanced device intelligence which includes sensor drift, corrosion
detection, range alarms and device diagnostics. These can check and alert the user when
thermocouples fail unexpectedly, resistance thermometers exceed set parameters or the device
has failures. A more detailed explanation of these features is provided later in this section. For
more information on the THZ
3
/TDZ
3
diagnostics please see Section 6.
HART 7 compliance provides device configuration via DD, HART diagnostic data and exception
based reporting. In addition a DTM is provided to enable programming and monitoring with any
FDT compliant host or program such as PACTware.
The TDZ
3
has an additional feature, an easy-to-read customizable display.
The THZ3 [DIN] is also available with an AIS option which allows direct connection of sensors
from an intrinsically safe area. See Section 3 Installation and Wiring for more information.