Emerson Rosemount 326T User manual

Quick Start Guide
00825-0100-4328, Rev 01
January 2019
Rosemount™ 326T Temperature Transmitter

2

Contents
Chapter 1 Introduction.................................................................................................................. 5
1.1 Functions and features..................................................................................................................... 5
Chapter 2 Installation.....................................................................................................................7
2.1 Mounting the transmitter.................................................................................................................7
2.2 Connect the transmitter................................................................................................................... 7
Chapter 3 Operation...................................................................................................................... 9
3.1 Display elements.............................................................................................................................. 9
3.2 Parameter settings........................................................................................................................... 9
3.3 Adjustable parameters................................................................................................................... 10
3.4 Operating modes........................................................................................................................... 10
Chapter 4 Temperature resistance............................................................................................... 11
Chapter 5 Product certifications...................................................................................................13
5.1 European directive information...................................................................................................... 13
5.2 Ordinary location information........................................................................................................ 13
5.3 3-A® certification............................................................................................................................13
5.4 Other industry certifications...........................................................................................................13
Chapter 6 Factory settings........................................................................................................... 15
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Contents Quick Start Guide
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1 Introduction
The Rosemount 326T Temperature Transmitter detects media temperature and converts
it into an analog output signal (4 - 20 mA).
1.1 Functions and features
The temperature transmitter converts the measured signal into a temperature-
proportional analog signal. Depending on the parameter setting, the output signal is:
•4-20 mA with setting OU = I
•20-4 mA with setting OU = Ineg
The temperature transmitter can scale the analog signal to accommodate the application.
For more technical data, see the Rosemount™ 326T Temperature Transmitter Product
Data Sheet or Emerson.com/Rosemount.
Maximum measuring range when OU = I Measuring range scaled when OU = I
•MAW = initial value of the measuring range
•MEW = final value of the measuring range
•ASP = analog start point
•AEP = analog end point
Note
The minimum difference between ASP and AEP is 9 °F (5 °C).
If the temperature is within the measuring range, the output signal is between 4-20 mA. If
the temperature is outside the measuring range, the output signal is between these
ranges:
Temperature condition Output signal when OU = I Output signal when OU = Ineg
Temperature > AEP 20-20.6 mA 4-3.7 mA
Temperature > MEW 20.6 mA 3.7 mA
Temperature < ASP 4-3.7 mA 20-20.6 mA
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Temperature condition Output signal when OU = I Output signal when OU = Ineg
Temperature < MAW 3.7 mA 20.6 mA
Note
In a fault condition, the output signal reacts according to the FOU parameter.
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2 Installation
This section provides instructions for mounting and connecting the temperature
transmitter.
2.1 Mounting the transmitter
Follow these instructions to mount the temperature transmitter.
Note
If installing in a 3-A compliant environment, follow 3-A standards for installation.
Procedure
1. Position the transmitter to the desired orientation.
2. Install the clamp following recommended torque values provided by the clamp
manufacturer.
2.2 Connect the transmitter
Follow these instructions to connect the temperature transmitter for two-wire or four-wire
operations.
CAUTION
•A certified electrician must wire the temperature transmitter.
•Adhere to national and international regulations when wiring the temperature
transmitter.
Voltage supply to EN 50178, SELV, PELV / "supply class 2" to cULus.
Procedure
1. Disconnect power from the temperature transmitter.
2. Connect the temperature transmitter according to these wiring diagrams.
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Figure 2-1: Two-wire operation
Pin 1 L+
Pin 2 Analog signal for temperature
Figure 2-2: Four-wire operation
Pin 1 L+
Pin 2 Analog signal for temperature
Pin 3 L-
Pin 4 IO-Link
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3 Operation
This section provides information for using the temperature transmitter.
3.1 Display elements
The front of the temperature transmitter includes an alphanumeric display and LED
indicators.
A. Current temperature in °C
B. Current temperature in °F
C. Seven-segment LED display (4 digits)
3.2 Parameter settings
Use an IO-Link capable tool to read current process values and modify parameter values.
3.2.1 General information
The temperature transmitter uses an IO-Link communication interface that requires an IO-
Link master for operation.
IO-Link enables direct access to process and diagnostic data and allows the setting of
parameter values.
3.2.2 IO-Link information
The IODDs necessary for configuring the IO-Link device, detailed information about
process data structure, diagnostic information, parameter addresses and the necessary
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information about the required IO-Link hardware and software are available at
Emerson.com/Rosemount
3.3 Adjustable parameters
Use IO-Link software to configure these parameters.
Parameter Description
OU2 Output function: analog signal is 4-20 mA (I) or 20-4 mA (Ineg)
ASP2 Analog start point for the measured temperature value.
AEP2 Analog end point for the measured temperature value. The minimum
difference between ASP2 and AEP2 is 9 °F (5 °C).
COF Zero point calibration. Offsets the zero point ± 18 °F in steps of .18 °F (±
10 °C in steps of 0.1 °C).
FOU2 Behavior of the output after a fault.
•ON: the analog signal is driven to 21.1 mA.
•OFF: the analog signal is driven to 3.5 mA.
Uni Sets the temperature unit in °F or °C.
Update rate of display The rate at which the transmitter updates the displayed temperature
measurement.
•d1: 50 ms
•d2: 200 ms
•d3: 600 ms
Orientation of display rd: rotates the display by 180°.
3.4 Operating modes
The temperature transmitter uses different operating modes depending on the measured
temperature.
After turning on the temperature transmitter the temperature transmitter displays the
current measured temperature and the analog output provides a signal proportional to
the measured temperature.
If the temperature is outside of the measuring range the temperature transmitter displays
OL or UL.
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