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.

Page 10
3.4 Terminal Connections
Note: The power connections detailed below are for normal mains power.
Refer to section xxx for power wiring details when the 12V DC power option is
fitted.
Terminal No. Connection Colour
1Cable Shield Shield/Braid. Usually
covered with Green
sleeving.
2Positive Temperature Signal Clear or White
3Negative Temperature Signal Black
7+ve of current or voltage output Customer-defined
8-ve of current or voltage output Customer-defined
9No Connection
10 Normally Closed contact of
(optional) relay output Customer-defined
11 Common contact of (optional) relay
output Customer-defined
12 Normally Open contact of
(optional) relay output Customer-defined
13 240V AC Active input Brown (standard colour)
14 Duplicate 240V AC Active contact.
See section 11.1.Brown (standard colour)
15 240V AC Earth input Green (standard colour)
16 Duplicate 240V AC Earth contact.
See section 11.1.Green (standard colour)
17 240V AC Neutral input Blue (standard colour)
18 Duplicate 240V AC Neutral
contact. See section 11.1.Blue (standard colour)

Page 11
3.5 Setting the Control Limit
The control limit can be set over the full scale of the miniCHEM-Temp, as a “too
high” or a “too low” trip point. The hysteresis around this set point can be also be
adjusted, if necessary. See section 3.5.3 for an explanation of hysteresis.
3.5.1 Setting the limit value
1. Switch the miniCHEM-Temp to SET LIMIT.
The control limit value is now displayed. Note that the Alarm LED and
(optional) output relay are now disabled. The 4-20mA or 0-1V outputs are
still active, and proportional to displayed value.
2. Adjust the LIMIT control until the display reads the desired trip point value.
3.5.2 Setting the alarm/control direction
The control limit can be set as a “too high” or “too low” trip point using the Lo/Hi
Control jumpers in the terminal area. The miniCHEM-Temp must be switched
OFF before changing jumper settings.
The jumper settings for a “too low” trip point are…
Low High
The jumper settings for a “too high” trip point are…
Low High

Page 12
3.5.3 Adjusting the Hysteresis
The hysteresis is the Temperature range over which the alarm/control output
remains switched on, once the trip point has been exceeded.
For example, if the limit is set to 25.0 OC, as a “too low” trip point, with a
hysteresis of ±1.0 OC, the alarm/control output is switched ON when the reading
goes to 24.0 (i.e. 25.0 - 1.0). The output is not switched OFF until the reading
goes back up to 26.0 (i.e. 25.0 + 1.0).
The hysteresis stops the relay “chattering” around the set point, by providing a
buffer between the points at which the output is switched ON and OFF. This
feature can significantly increase the life of heaters, pumps etc.
The factory-set hysteresis is approximately ±1.0 OC, as in the example above. The
hysteresis can be increased to as high as ±4.0 OC with the HYSTERESIS trimmer
in the terminal area. Turning the HYSTERESIS clockwise increases the
hysteresis and turning it anti-clockwise decreases the hysteresis.
TPS DOES NOT recommend that this setting be altered, unless it is absolutely
necessary.
The HYSTERESIS trimmer should only be adjusted a little at time. The process
being controlled should then be closely monitored over a time to ensure that the
desired control is being achieved.

Page 13
3.6 Selecting Current or Voltage Output
The Current/Voltage Output jumpers in terminal section can be user-set for
either 4 to 20mA or 0 to 1V DC output. The miniCHEM-Temp must be switched
OFF before changing jumper settings.
The jumper settings for 4 to 20 mA output are:
CVCVC
The jumper settings for 0 to 1V DC output are:
CVCVC
Note that the spare jumper has been fitted to a spare Current/Voltage Output
jumper pin. This is a safe place to keep it, in case the miniCHEM-Temp needs to
be reset to current output in the future.
0 to 10V DC output is available as a factory fitted option. The jumper settings
are the same as detailed above, but the 0 to 1V DC output will no longer be
available.

Page 14
3.7 Calibrating the 4 to 20mA Output
The 4 to 20mA output of the miniCHEM-Temp is factory calibrated. However,
TPS has provided calibration controls for the 4mA and 20mA points in case this
requires adjustment in the field. Only a limited amount of adjustment is available,
as the miniCHEM-Temp is designed for 4 to 20mA output for the full scale of
the instrument.
Calibrating the 4 to 20mA output…
1. Connect a Digital Milliamp Meter between terminals 7 and 8.
2. Switch the miniCHEM-Temp to SET LIMIT.
3. Adjust the LIMIT control until the display reads 00.0.
4. Adjust the ZERO/4mA trimmer in the terminal area until the Digital
Milliamp Meter reads 4 mA.
5. Adjust the LIMIT control until the display reads 100.0.
6. Adjust the SPAN/20mA trimmer in the terminal area until the Digital
Milliamp Meter reads 20 mA.
In the event that the LIMIT control does not have sufficient adjustment to
reach 00.0 or 100.0, calculate the expected output level and use this for
calibration. Remember that the difference between 00.0 and 100.0 is to be
made 16mA.

Page 15
4. Calibration
4.1 Calibration Procedure
1. Switch the miniCHEM-Temp on.
2. Ensure that the Temperature sensor is correctly connected (see section 3.4).
3. Set the function switch to STANDBY, to ensure that the (optional) relay
output is not activated accidentally.
4. 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.
5. When the Temperature reading has stabilised, adjust the ZERO control until
the miniCHEM-Temp displays the same temperature as the mercury
thermometer.
6. The miniCHEM-Temp is now calibrated and ready for Temperature
measurements.
4.2 Calibration Notes
1. The miniCHEM-Temp does not need to be re-calibrated unless the
Temperature sensor is replaced, unless the ZERO control is inadvertently
adjusted.

Page 16
5. Process Monitoring
Once the miniCHEM-Temp has been installed, connected and calibrated, it can
be used for continuous monitoring. To monitor the process, WITHOUT any
control or alarm functions switch the function switch to STANDBY.
6. Automatic Dosing
For Automatic Alarming or Control, switch the function switch to AUTO to
enable the Alarm LED and the (optional) relay output. These will be switched ON
while the Temperature exceeds the limit value, and will switch OFF once the
Temperature is back within the limit.
7. Manual Dosing
From time to time, a Temperature adjustment may be required even when the
Temperature is within the limit value. To do this, simply switch the function
switch to MANUAL, if the (optional) relay output is fitted.
NOTE: The output will be ON continuously while the function switch is set to
MANUAL. It will not be switched OFF again until the switch is set
back to one of the other modes.
8. Fuse Replacement
If the current drain from any device connected to the output relay exceeds 1 Amp,
the output protection fuse will blow.
To replace the fuse…
1. SWITCH THE miniCHEM-Temp OFF.
2. Pull out the black fuse carrier.
3. Replace the blown fuse
4. Push the fuse carrier with the new fuse back into place.
ALWAYS REPLACE THE FUSE WITH A 1 AMP, 240V
FUSE. USING A FUSE WITH HIGHER CURRENT RATING
MAY DAMAGE YOUR CONTROLLER, VOIDING THE
WARRANTY.
Before switching the miniCHEM-Temp back to AUTO mode, ensure that the
cause of the blown fuse has been eliminated.
If the current drain of the device connected to the relay output is greater than 1
Amp, an external contactor should be used. Please consult an electrical contractor
or TPS for details.

Page 17
9. Troubleshooting
9.1 Instrument Function Troubleshooting
Symptom Possible Causes Remedy
No display 1. Mains power input not
switched on.
2. Mains power input
incorrectly connected.
3. Instrument is faulty.
Switch power ON.
Check connections (see section
3.4).
Return to TPS for repair.
Alarm LED or
(optional) relay
output do not
operate when limit
is exceeded.
1. Limit not set correctly for
“too high” or “too low”
alarm/control.
2. Optional relay output not
fitted.
3. Hysteresis too large.
4. Fuse has blown.
5. Instrument is faulty.
Set the Lo/Hi Output jumpers
correctly (see section 3.5.2).
Return unit to factory to have
relay output fitted (part no
130342).
Check and adjust the
HYSTERESIS trimmer (see
section 3.5.3). If in doubt, set
this to minimum level.
Check and replace fuse if
necessary (see section 8).
Return to TPS for repair.
Incorrect analogue
output signal. 1. Current/Voltage Output
jumpers incorrectly set for
required output.
2. 4-20mA loop resistance too
high.
3. Load on 0-1V DC output is
too low.
4. 4-20mA output is not
calibrated.
5. Instrument is faulty.
Check that the Current/Voltage
Output jumpers are correctly
set for 4-20mA or 0-1V, as per
requirements. Adjust if
necessary (see section 3.6).
Ensure loop resistance does not
exceed 500 Ohms.
Ensure load is 1000 Ohms
minimum.
Calibrate 4-20mA output (see
section 3.7).
Return to TPS for repair.

Page 18
9.2 Temperature Troubleshooting
Symptom Possible Causes Remedy
Meter displays
"-1. " or large
negative reading
(eg. "-180.0"
1. Sensor not connected or
not connected correctly.
2. Sensor is faulty.
Check sensor connections
(section 3.4).
Replace sensor.
Meter displays the
same Temperature
reading, regardless
of solution
temperature.
Meter is switched to "SET
LIMIT". Switch meter to "STANDBY"
for process monitoring or
"AUTO" for monitoring plus
automatic control.
Temperature
inaccurate and
cannot be
calibrated.
Faulty temperature sensor. Return sensor to factory for
replace, or replace sensor.

Page 19
10. Warranty
TPS Pty. Ltd. guarantees all instruments and electrodes to be free from defects in
material and workmanship when subjected to normal use and service. This
guarantee is expressly limited to the servicing and/or adjustment of an instrument
returned to the Factory, or Authorised Service Station, freight prepaid, within
twelve (12) months from the date of delivery, and to the repairing, replacing, or
adjusting of parts which upon inspection are found to be defective. Warranty
period on electrodes is three (3) months.
There are no express or implied warranties which extend beyond the face hereof,
and TPS Pty. Ltd. is not liable for any incidental or consequential damages arising
from the use or misuse of this equipment, or from interpretation of information
derived from the equipment.
Shipping damage is not covered by this warranty.
PLEASE NOTE:
A guarantee card is packed with the instrument or electrode. This card must be
completed at the time of purchase and the registration section returned to TPS Pty.
Ltd. within 7 days. No claims will be recognised without the original guarantee
card or other proof of purchase. This warranty becomes invalid if modifications or
repairs are attempted by unauthorised persons, or the serial number is missing.
PROCEDURE FOR SERVICE
If you feel that this equipment is in need of repair, please re-read the manual.
Sometimes, instruments are received for "repair" in perfect working order. This
can occur where batteries simply require replacement or re-charging, or where the
electrode simply requires cleaning or replacement.
TPS Pty. Ltd. has a fine reputation for prompt and efficient service. In just a few
days, our factory service engineers and technicians will examine and repair your
equipment to your full satisfaction.
TO OBTAIN THIS SERVICE, PLEASE FOLLOW THIS PROCEDURE:
Return the instrument AND ALL SENSORS to TPS freight pre-paid and insured
in its original packing or suitable equivalent. INSIST on a proof of delivery receipt
from the carrier for your protection in the case of shipping claims for transit loss
or damage. It is your responsibility as the sender to ensure that TPS receives the
unit.