TPS MicroChem-T Manuel utilisateur
MicroChem-T
TPS Pty Ltd
ABN 30 009 773 371
Phone: (07) 32058027
International: 61 7 32058027
Email: [email protected]
Web: www.tps.com.au
Congratulations !
Your new microCHEM-Temp transmitter module is a simple, lower power
device for interfacing a temperature sensor with datalogging and process
control equipment. The industry standard 0 to 1 V DC and 0 to 5 V DC outputs
ensure that the microCHEM-Temp is compatible with most such devices.
The microCHEM-Temp is a breeze to operate. This manual has been designed
to help you get started, and also contains some handy application tips. If at any
stage you require assistance, please contact either your local TPS
representative or the TPS factory in Brisbane.
The manual is divided into the following sections:
1. Table of Contents
Each major section of the handbook is clearly listed. Sub-sections have also
been included to enable you to find the information you need at a glance.
2. Introduction
The introduction has a diagram and explanation of the display and controls
of the microCHEM-Temp. It also contains a full listing of all of the items
that you should have received with the unit. Please take the time to read this
section, as it explains some of items that are mentioned in subsequent
sections.
3. Main Section
The main section of the handbook provides complete details of the
microCHEM-Temp, including operating modes, calibration,
troubleshooting, specifications, and warranty terms.
4. Appendices
Appendices containing background information and application notes are
provided at the back of this manual.
2
Contents
1. Introduction 4
1.1 Unpacking Information 4
1.2 Specifications 5
2. Installation and Set-up 6
2.1 Connection and Configuration Diagram 6
2.2 Mounting the Enclosure 7
2.3 Mounting the Sensors 7
2.4 Terminal Connections 8
2.5 Selecting 0 to 1 V DC or 0 to 5 V DC Output 8
3. Calibration 9
3.1 Calibration Procedure 9
3.2 Calibration Notes 9
4. Troubleshooting 10
4.1 Instrument Function Troubleshooting 10
4.2 Temperature Troubleshooting 10
5. Warranty 11
3
1. Introduction
1.1 Unpacking Information
Before using your new microCHEM-Temp, please check that the following
accessories have been included:
Part No
1. microCHEM-Temp Transmitter Module 114144
2. Mounting feet, kit of 4, complete with screwsNRMICRO
3. microCHEM-Temp Handbook 130050
Options that may have been ordered with your microCHEM-Temp:
Dip mounted Temperature sensor…
1. Industrial Temperature Sensor, 5m 114200
Screw-in Temperature Sensors, and adaptor for 40mm PVC pipe…
1. Screw-in Industrial Temperature Sensor, 5m 114201
2. ¼” BSP thread adaptor for 40mm PVC pipe 111305
4
1.2 Specifications
Range 0 to 200 OC
(sensor limit 120 OC)
Resolution ±1mV (0 – 1 V DC Output) or ±5mV ( 0 – 5 V DC Output)
Accuracy ±1mV (0 – 1 V DC Output) or ±5mV ( 0 – 5 V DC Output)
Linearity ±1mV (0 – 1 V DC Output) or ±5mV ( 0 – 5 V DC Output)
Repeatability ±1mV (0 – 1 V DC Output) or ±5mV ( 0 – 5 V DC Output)
Ambient Drift <0.02% span per / OC
Long term drift <0.1% per year
Zero Range ±10 OC
Enclosure Polycarbonate, waterproof to IP65
Analogue Outputs 0 to 1 V DC
or 0 to 5 V DC
Isolation Galvanic isolation of sensor input
Power 12V DC, approx 10mA
Dimensions Enclosure : 125 x 85 x 56 mm
PCB only : 115 x 77 mm
(82 x 58 mm mounting hole
centres)
Mass Instrument only : Approx 250 g
Full Kit : Approx 750 g
Operating Environment:Temperature : 0 to 45 oC
Humidity : 0 to 95 % R.H.
5
2. Installation and Set-up
2.1 Connection and Configuration Diagram
The diagram below is provided as a reference for the terminal connections,
configuration jumpers and user-adjustable trimmers that are discussed
throughout this section.
6
2.2 Mounting the Enclosure
The microCHEM-Temp can be mounted directly onto a wall or into a separate
enclosure using the mounting kit supplied. Please use the screws supplied to
ensure that the waterproof integrity of the enclosure is not compromised.
2.3 Mounting the Sensors
Mounting the sensor is a very important aspect of the installation, and is often
done incorrectly. In automatic control situations, the sensor should always be
mounted as close as possible to the control point (ie. heater or cooling tower
etc.). This will cause the sensor to detect the change in Temperature
immediately, and shut automatic control off until mixing has taken place. For
in-line mounting, it is important that Temperature control is upstream.
Additionally, the line can be run through a mixing chamber, such as a large
drum, to ensure that the areas of varying temperatures have mixed in properly by
the time the solution flows past the sensor. There must always be adequate flow
of fresh sample past the sensor for accurate monitoring. The diagrams below
show typical mounting arrangements for “dip” mounting and in-line mounting.
Dip Mounting In-line Mounting
1. Control point close to sensor. 1. Injection point upstream from
2. Continuous stirring. and close to sensor.
2. Mixing container after injection
and before sensor.
7
2.4 Terminal Connections
Terminal
No.
Connection
Colour
Sensor Connections
1
Shield of cable
Green
2
Positive Temperature Signal
Clear or White
3
Negative Temperature Signal
Black
Power Input Connections
–
Negative of 12V DC Input
Customer-defined
+
Positive of 12V DC Input
Customer-defined
Signal Output Connections
COM
Common of voltage output
Customer-defined
OUT
Positive of voltage output
Customer-defined
2.5 Selecting 0 to 1 V DC or 0 to 5 V DC Output
1. Locate the jumper labelled J1 on the main circuit board.
2. Set J1 to closed to select 0 to 1 V DC output.
3. Set J1 to open to select 0 to 5 V DC output.
Note
When setting J1 to open, we recommend that it is fitted to one of the pins.
This is a safe place to keep it, in case the microCHEM-Temp needs to be reset
for 0 to 1 V DC output in the future.
8
3. Calibration
3.1 Calibration Procedure
1. Ensure that the Temperature sensor is correctly connected (see section 2.4).
2. Place the sensor into a beaker of room temperature water, alongside a good
quality mercury thermometer. Stir the probe and the thermometer gently to
ensure an even temperature throughout the beaker.
3. When the output has stabilised, adjust the ZERO control until the output
corresponds to the temperature displayed by the mercury thermometer.
For 0 – 1 V DC, the mV output is 5 times the temperature. For example,
25.0 OC corresponds to 125 mV output.
For 0 – 5 V DC, the mV output is 25 times the temperature. For example,
25.0 OC corresponds to 625 mV output.
DO NOT ADJUST THE RED SPAN CONTROL. THIS IS
FACTORY-FIXED AND DOES NOT REQUIRE RE-ADJUSTMENT.
4. The microCHEM-Temp is now calibrated and ready for Temperature
measurements.
3.2 Calibration Notes
1. The microCHEM-Temp does not need to be re-calibrated unless the
Temperature sensor is replaced, or the ZERO control is inadvertently
adjusted.
9
4. Troubleshooting
4.1 Instrument Function Troubleshooting
Symptom
Possible Causes
Remedy
Incorrect analogue
output signal.
1. J1 Output Jumper
incorrectly set for required
output.
2. Instrument is faulty.
Check that the J1 Output
Jumper is correctly set for 0 to
1 V DC or 0 to 5 V DC output,
as per requirements. Adjust if
necessary (see section 2.5).
Return to TPS for repair.
4.2 Temperature Troubleshooting
Symptom
Possible Causes
Remedy
Meter outputs large
positive or negative
constant output
1. Sensor not connected or not
connected correctly.
2. Sensor is faulty.
Check sensor connections
(section 2.4).
Replace sensor.
Temperature
inaccurate and
cannot be
calibrated.
Faulty temperature sensor.
Return sensor to factory for
replace, or replace sensor.
10
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