TPS miniCHEM-Temp User manual

Congratulations !
Your new miniCHEM-Temp monitor is the latest in simple, reliable process
monitoring instrumentation. With correct operation and maintenance, your
miniCHEM-Temp will give you many years of reliable service.
The miniCHEM-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 miniCHEM-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
miniCHEM-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.
TPS Pty Ltd
4 Jamberoo Street
Springwood, Brisbane,
Australia, 4127
Phone :[phone]
International :61 7 32 900 400
Fax :[phone]
International :61 7 3808 4871
Email :[email protected]
miniCHEM-Temp
Process Monitor
Handbook Version : 2.0
Date : 15-Feb-00
Author : MS

Page 1
Web Site :www.tps.com.au

Page 2Contents
1. Introduction..............................................................................................3
1.1 miniCHEM-Temp Illustration...........................................................................3
1.2 Unpacking Information.....................................................................................5
1.3 Specifications....................................................................................................6
2. Operating Modes...................................................................................... 7
3. Installation and Set-up.............................................................................8
3.1 Connection and Configuration Diagram............................................................8
3.2 Mounting the Enclosure....................................................................................9
3.3 Mounting the Sensor.........................................................................................9
3.4 Terminal Connections.....................................................................................10
3.5 Setting the Control Limit................................................................................11
3.6 Selecting Current or Voltage Output...............................................................13
3.7 Calibrating the 4 to 20mA Output...................................................................14
4. Calibration.............................................................................................. 15
4.1 Calibration Procedure .....................................................................................15
4.2 Calibration Notes............................................................................................15
5. Process Monitoring................................................................................ 16
6. Automatic Dosing .................................................................................. 16
7. Manual Dosing ....................................................................................... 16
8. Fuse Replacement ................................................................................. 16
9. Troubleshooting .................................................................................... 17
9.1 Instrument Function Troubleshooting .............................................................17
9.2 Temperature Troubleshooting .........................................................................18
10. Warranty ............................................................................................. 19
11. Appendices......................................................................................... 21
11.1 Terminal connections when 12V DC option is fitted...................................21
11.2 Relay Output Wiring Examples for mains powered unit..............................22
11.3 Relay Output Wiring Examples for 12V DC powered units.........................23
11.4 Drilling Template.......................................................................................24

Page 3
1. Introduction
1.1 miniCHEM-Temp Illustration

Page 4
¬Alarm LED
The Alarm LED provides visual indication of when the control limit has been
exceeded. The control limit can be set for a “too high” or a “too low” alarm.
See section 3.5.
-Limit Control
Adjust this control to the Temperature value at which the Alarm LED and
(optional) relay output are activated. See section 3.5.
®Zero Calibrate Control
Adjust this control to calibrate the miniCHEM-Temp sensor. See section
4.1.
¯Span
This control is not required for the miniCHEM-Temp.
°Function Switch
The Function Switch is used to select the mode of operation. See section 2.
±Display Window
The miniCHEM-Temp has a large, easy to read LCD display. The units of
measurement are clearly shown in the window beneath the display.
ÆTerminal Cover
The terminal cover provides easy access to all of the connections, (optional)
relay output fuse, configuration jumpers and user-adjustable trimmers. The
cover is water resistant to IP65.

Page 5
1.2 Unpacking Information
Before using your new miniCHEM-Temp, please check that the following
accessories have been included: Part No
1. miniCHEM-Temp Process Monitor.......................114140
2. miniCHEM-Temp Handbook................................130050
Options that may have been ordered with your miniCHEM-Temp:
Temperature Sensors…
1. Dip type Temperature sensor, 5m ...........................114200
2. Screw-in type Temperature sensor, 5m ...................114201
3. Adaptor to fit screw-in sensor into 40mm................111305
PVC Pipe
Instrument options…
1. Relay control output...............................................130342
2. 4-20mA loop-powered, remote LCD.......................130080
3. 12V DC Power Option...........................................130072

Page 6
1.3 Specifications
Ranges ..................................................................................0 to 100.0 OC
Resolution ..............................................................................................0.1 OC
Accuracy...............................................................................................±0.1 OC
Linearity................................................................................................±0.1 OC
Repeatability........................................................................................±0.1 OC
Ambient Drift........................................................................<0.02% Span / OC
Long term drift..........................................................................<0.1% per year
Calibrate Range....................................................................................±10 OC
Sensor........................................................................... 4401 Silicon Transistor
Enclosure .....................................................Polycarbonate, waterproof to IP65
Display..........................................12.7 mm LCD (optional remote 4-20mA loop
powered display available)
Analogue Outputs.......................4 to 20mA (500 Ohms max. loop resistance )
0 to 1 V DC (min. load 1000 Ω)
0 to 10 V DC optional (min. load 1000 Ω)
Control Output (optional)...............................Clean contact changeover relay,
rated to 2A at 240V AC
Isolation ......................................................... Galvanic isolation of sensor input
Power ...................................................240V AC, 50/60Hz (120V AC optional)
12V DC also optional (Part No 130072)
Dimensions......................................................................... 172 x 160 x 71 mm
Mass.................................................................. Instrument only :Approx 800g
Full Kit :Approx 1.2kg
Operating Environment:............................... Temperature :0 to 45 oC
Humidity :0 to 95% R.H.

Page 7
2. Operating Modes
The function switch is used to select the required mode. The four operating modes
available are…
1. SET LIMIT :Switch to SET LIMIT when setting the Temperature value at
which the Alarm LED and (optional) relay output are
activated. The relay output is not operational in this mode.
See section 3.5.
2. STANDBY :Switch to STANDBY to inhibit the Alarm LED and
(optional) output relay action. Select this mode for
calibration, or when automatic control is not required.
3. AUTO :Switch to AUTO to enable the Alarm LED and (optional)
relay output. These will be activated when the Temperature
is outside the limit value. See section 3.5.
4. MANUAL :Switch to MANUAL to manually activate the Temperature
control device when the optional relay output is fitted. The
relay output will be activated for as long as the
miniCHEM-Temp is in this mode, regardless of the
Temperature reading. See section 7.

Page 8
3. Installation and Set-up
3.1 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.

Page 9
3.2 Mounting the Enclosure
The miniCHEM-Temp can be wall-mounted with 3 screws. Two mounting points
are located underneath the terminal cover, and are positioned so that they do not
affect the waterproofing of the enclosure. The third mounting point is centrally
located near the top of the rear of the enclosure, and has been designed to hook
over a screw-head. The dimensions for the mounting screw centres are provided on
the rear of the enclosure. The last page of this manual may be photocopied or
removed for use as a drilling template.
3.3 Mounting the Sensor
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.