TPS MicroChem-Sal Manuale utente
MicroChem-Sal_TDS
MicroCHEM-Sal Transmitter Module
Date:23-Nov-2006
Version: 1.02
Author: AB
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-Sal transmitter module is a simple, lower power device
for interfacing a Salinity/TDS 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-Sal is compatible with most such devices.
The microCHEM-Sal 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.
1. Introduction
The introduction has a diagram and explanation of the display and controls
of the microCHEM-Sal. 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.
1. Main Section
The main section of the handbook provides complete details of the
microCHEM-Sal, including operating modes, calibration, troubleshooting,
specifications, and warranty terms.
1. 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 11
3.3 Calibration Data 11
4. Troubleshooting 12
4.1 Instrument Function Troubleshooting 12
4.2 Salinity/TDS Troubleshooting 12
5. Warranty 15
6. Appendices 18
6.1 Re-setting the Measurement Range 18
6.2 Care, Cleaning and Maintenance of Salinity/TDS Electrodes 19
3
1. Introduction
1.1 Unpacking Information
Before using your new microCHEM-Sal, please check that the following
accessories have been included:
Part No
1. microCHEM-Sal Transmitter Module 112146
1. Mounting feet, kit of 4, complete with screwsNRMICRO
1. microCHEM-Sal Handbook 130050
2. Salinity/TDS standard to suit specified range, 200mL
Salinity/TDS Sensors…
1. k=0.1 GK Series Salinity/TDS Sensor, 5m 112205
2. k=1.0 GK Series Salinity/TDS Sensor, 5m 112206
3. k=10 GK Series Salinity/TDS Sensor, 5m 112207
4
1.2 Specifications
Ranges
k=0.1 Sensor 0 to 10.00 ppM, 0 to 100.0 ppM, 0 to 1000 ppM
k=1.0 Sensor 0 to 100.0 ppM, 0 to 1000 ppM, 0 to 10.00 ppK
k=10 Sensor 0 to 1000 ppM, 0 to 10.00 ppK, 0 to 100.0 ppK
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% / OC
Long term drift <0.1% per year
Zero Range ±5 %
Span Range 70 to 130%
Temperature Compensation Automatic, 0 to 100.0 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 1.0 kg
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-Sal 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 injection point. This will cause the sensor to
detect the added chemicals or water immediately, and shut the addition off until
mixing has taken place. For in-line mounting, it is important that injection is
upstream. Additionally, the line must be run through a mixing chamber, such as a
large drum, to ensure that the injected chemical or water has 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. Injection point close to sensor. 1. Injection point upstream from
2. Continuous stirring. and close to sensor.
2. Mixing container after injection
and before sensor.
3. A flow-through assembly for in-line
mounting is available from TPS.
7
2.4 Terminal Connections
Terminal No.
Connection
Colour
Sensor Connections
1
Salinity/TDS Sensor ATC
Blue
2
Salinity/TDS Sensor ATC
White
3
No Connection
4
Shield (if fitted to cable)
Green or Braid
5
Salinity/TDS Sensor Cell
Red
6
Salinity/TDS Sensor Cell
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-Sal needs to be reset for
0 to 1 V DC output in the future.
8
3. Calibration
3.1 Calibration Procedure
1. Switch the microCHEM-Sal on.
1. Ensure that the Salinity/TDS sensor is correctly connected (see section 2.4).
2. For the GK-1 sensor (part no 112206), ensure that the white protective cover
is fitted with the vent hole towards the cable end of the sensor.
3. Rinse the Salinity/TDS sensor in distilled water and blot dry.
Zero Calibration
4. Shake the Salinity/TDS sensor dry and hang it in air. DO NOT wipe the
platinised platinum electrode surface, as this will remove the platinum-black
layer.
5. When the reading has stabilised, adjust the ZERO control until the output is
exactly 0 mV.
Span Calibration
6. Place the Salinity/TDS sensor into a small sample of Salinity/TDS standard.
A suitable standard should be chosen for the display range of the unit.
9. For GK-1 (part no 112206) and GK-10 (part no 112207) sensors, ensure that
they are immersed at least to the vent hole in the white plastic cover. The
GK-0.1 (part no 112205) sensor does not have a cover, so it should be
immersed to the large thread (see diagrams below).
9
10. When the reading has stabilised, adjust the SPAN control until the output
corresponds to the value shown in the Calibration Data table in section 3.3.
10
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