Colorado Series CR-30 Portable Conductivity / Temperature / TDS / Salinity Meter Operation Manual
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Contents Page General Introduction and Initial Inspection............................ 4 Safety Infomation................................................. 5 Replacing the Batteries............................................. 6 Operation Display and Keys......................................... 7 Measurement Modes of the Meter................................... 10 Setup........................................................... 12 Calibration....................................................... 14 Auto Ranging..................................................... 15 Preparing and Storage of Standard Solutions.......................... 16 Error Displays.................................................... 17 Recycling........................................................ 18 Specifications.................................................... 19 C Marking....................................................... 20 3
General Introduction and Initial Inspection The CR meter is a precise instrument for the measurement of conductivity. A built-in microcomputer is used to store, calculate and compensate for all the relevant parameters relating to conductivity, TDS and salinity determination. The mechanical touch keys are highly reliable with tactile and audio feedback. This meter operates with four type AA batteries (1.5 V). Recalibration is not required when the power is turned on again. The CR meter has a large LCD that displays conductivity, TDS or salinity and temperature along with user prompting modes and indication icons. The instrument prompts the user through the calibration and measurement procedures. The meter uses mini DIN with a builtin temperature sensor. Other features include automatic or manual temperature compensation, percentage of power supply display. Carefully unpack the meter and accessories. Inspect for damage caused during shipment. If any damage is found, notify your representative immediately. See instructions on page 18 for recycling of the packing materials. * Sensor used throughout this manual refers to a conductivity sensor. 4
Safety Information The CR portable meter, complies with the European Council Directives as well as international regulations and standards for electrical equipment, electromagnetic compatibility, and the stipulated safety requirements. Improper use or handling, however, can result in damage and/or injury. To prevent damage to the equipment, read these operating instructions thoroughly before using your portable meter. Keep these instructions in a safe place. Please observe the following to ensure safe and reliable operation of your portable meter:! Do not use this equipment in hazardous areas/locations. Note on installation: The operator shall be responsible for any modifications to Denver instrument equipment and must check and, if necessary, correct these modifications. On request, Denver instrument will provide information on the minimum operating specifications (in accordance with the Standards listed on page 19 for defined immunity to interference). Industrial protection ratings for the housing: Portable meter: IP65 If you have any problems with your portable meter: contact your local Denver Instrument office, dealer or service center.! If you use electrical equipment in installations and under ambient conditions requiring higher safety standards, you must comply with the provisions as specified in the applicable regulations for installation in your country. Use Denver instrument accessories, as these are optimally designed for use with your portable meter. 5
Replacing the Batteries Follow the procedures to replace the internal batteries. 1. Replace batteries when the low battery icon appears on the LCD. The instrument can operate within specifications for approximately one hour after the low battery icon starts to appear. 2. The battery compartment is located at the bottom side of the meter (refer to Figure 1). Flip the meter over so that the bottom side is facing up. Slide the battery cover to expose the battery compartment. 3. Replace all four type AA batteries. 4. Replace battery cover. Figure 1 6
Operation Display and Keys When the instrument is not in use, press the ON/OFF key to turn off the instrument. About the LCD 10 9 8 1 7 Sal TDS ɥ m S/cm Uncompensated ppt mg/l 6 2 Setup Cal % C CELL K=0.1 1.0 10.0 3 5 4 Figure 2 1 Low Battery Icon 2 Cell constant Icons 3 Setup and Calibration Icons 4 Temperature Coefficient 5 Temperature Reference 6 Measurement Units 7 Temperature Icon 8 Measurement Modes 9 Stability Icon 10 Measurement/Calibration In progress Icon 7
The Keypad 1 2 3 4 5 6 7 Figure 3 1 [ ] key: This key is used to increase the value or choose parameters in the [Setup] menu and [Calibration] menu. 2 [ ] key: This key is used to decrease the value or choose parameters in the [Setup] menu and [Calibration] menu. 3 [Setup] key: During normal measurement modes, this key will change the mode from the normal measurement mode to the [Setup] menu. See the Setup section. 4 [Mode] key: In normal measurement modes, this key will change the measurement mode to the Uncompensated Conductivity, Compensated Conductivity, TDS or Salinity. In the [Setup] menu, this key will exit the current parameter setting and advance to the next one. 8
In the [Calibration] menu, this key will exit the current setting and return to the normal measurement mode. 5 [Enter] key: During the [Setup] or [Calibration] menu, this key will save the current setting parameters and the calibration parameter. During the normal measurement mode, hold this key for about five seconds. The meter will then reload the default setting parameters and calibration parameter and erase existing calibration. 6 [Cal] key: During normal measurement modes, this key will change the mode from the normal measurement mode to the [Calibration] menu. See the Calibration section. 7 key: This key is used to turn the meter on or off. Connector 1 Turning the Meter ON/OFF Once the batteries are installed correctly in the meter, it automatically turns on. If not, press the key to turn it on. It will activate all segments of the display for a few seconds. Then the meter will display the current cell constant. Shortly afterwards, the temperature will be shown on the LCD and the meter is ready to perform a measurement. Immerse the sensor halfway in the solution. If possible, do not allow the sensor to touch any solid object in the solution. There should be no air bubbles around the sensor either. Shaking or moving the sensor vigorously before recording any measurement will dislodge any air bubbles formed in the sensor. When the meter is not in use, the user should turn off the meter by pressing the key to save battery power. When the voltage of batteries is too low, the meter will display for about to shut down for a few seconds, then shut down by itself. Figure 4 1 Sensor DIN connector 9
Measurement Modes of the Meter This meter has four normal measurement modes as follows: 1. Uncompensated Conductivity (µs/cm or ms/cm): This measures the conductive material in the solution with no regard to temperature. 2. Compensated Conductivity (µs/cm or ms/cm): Also known as temperature compensated conductivity that automatically adjusts to a calculated value which would have been read if the sample had been at 25 C (or a different reference temperature that you select). See the section on CALIBRATION SETUP. 3. TDS (mg/l or g/l): This measures the total dissolved solids (TDS); the calculation is based on the Compensated Conductivity and a TDS CONSTANT. The TDS CONSTANT is adjustable. See the section on Setup. 4. Salinity (ppt): This measures the salinity in the solution; the calculation is based on the Conductivity and Temperature. 10
The temperature is always displayed in all measurement modes. To change between measurement modes, simply press and release the [Mode] key. Then the unit will cycle through these four modes. When changing the mode, please carefully follow the prompts indicated by the icons on the LCD. Note: Every time the meter is turned OFF, the last mode will be saved so that when the meter is turned back ON again, it will return to the last mode selected. This meter has two special menu as follows: 1. [Setup] menu: Set or customize parameters in the meter with the SETUP icon on. 2. [Calibration] menu: Calibrating cell constant of the conductivity sensor with the CAL icon on. 11
Setup The default parameters were loaded in this meter before leaving the factory, but you can customize these parameters if you want. Setup Process 1. During the normal measurement modes, press the [Setup] key and the Setup icon will appear on the display. BASIC CELL CONSTANT for sensor 2. The meter displays the current (calibrated previously or default) cell constant while the lower part of the LCD shows the available cell constant. Using the [ ] and [ ] keys, you can now change the basic cell constant for the sensor in use. Choose from the three available cell constants (0.1, 1.0 and 10.0). Default is 1.0. 3. Press the [Enter] key to save the new value of the basic cell constant for the sensor or press the [Mode] key to exit and go to the next temperature coefficient parameter: TEMPERATURE COEFFICIENT 4. The unit will display 1.91% or a value previously set using this procedure. Use the [ ] and [ ] keys to change the value to the new temperature coefficient desired. Press the [Enter] key to save the new value of the temperature coefficient or press the [Mode] key to exit and go to the next temperature reference parameter: 12
TEMPERATURE REFERENCE 6. The unit will display 25.0 C or a value previously set using this procedure. Use the [ ] and [ ] keys to change the value to the desired new temperature reference. 7. Press the [Enter] key to save the new value of temperature reference or press the [Mode] key to exit and go to the next TDS constant parameter: TDS CONSTANT 8. The unit will display 0.5 or a value previously set using this procedure. Use the [ ] and [ ] keys to change the value to the new TDS constant desired. 9. Press the [enter] key to save the new value of TDS constant or press the [Mode] key to exit the SETUP PROCESS. 13
Calibration Before Calibration System calibration is rarely required as the CR-30 model is already factory pre-calibrated. However, from time to time it is recommended that you check the system calibration and adjust it when necessary. When you use a new sensor or meter, run the CALIBRATION mode, as the cell constant of the conductivity sensors may differ from one other. Calibration Process 1. During the normal measurement modes, press the [Cal] key and the CAL icon will appear on the LCD. CELL CONSTANT CALIBRATION 2. Immerse the sensor into a known standard conductivity solution (See the section on Preparing and Storage of Standard Solutions) that you select to calibrate your sensor. The meter will display the conductivity value of the standard solution. 3. Wait for the values of temperature and conductivity to stabilize for a few seconds. Using the [ ] and [ ] keys, you can now adjust the reading of the display until it matches the value of the known standard conductivity solution at 25 C. 4. Press the [Enter] key to calculate and save the new value of cell constant or press the [Mode] key to exit the CALIBRATION PROCESS. During cell constant calibration, the following parameters are overridden: temperature reference (set at 25.0 C) and temperature coefficient (set at 1.91%). 14
Auto Ranging The model CR-30 is an auto ranging meter. This means that, regardless of the conductivity of the solution (within the specifications of the meter), all you need to do to get on reading is to place the sensor into the sample. After immersing the sensor into the solution, the meter will automatically find the right range for the solution. While searching for the correct range, the meter will display ran on the LCD. AUTO RANGING will take a few seconds after which the measurement will be displayed. Press and release the [Mode] key to show values in other parameters. 15
Preparing and Storage of Standard Solutions Suitable conductivity standards are available commercially or the user can prepare them using research grade reagents. Here are some standard solutions you can prepare to calibrate the sensor of the CR-30 model: 1. Standard solution of 1413 µs at 25 C: Accurately weigh out 0.746 g of research grade dried Potassium Chloride (KCl). Dissolve it in 1000 ml of deionized water You can store the remaining solution in a plastic container for one week; however, the headspace between the cap and the solution must be kept to an absolute minimum. Storing the solution below 4 C can prolong the storage life. If you have any doubt about the accuracy of the stored solution, prepare a fresh batch. 2. Standard solution of 12.90 ms at 25 C: Accurately weigh out 7.4365 g of research grade dried Potassium Chloride (KCl). Dissolve it in 1000 ml of deionized water 3. Standard solution of 111.0 ms at 25 C: Accurately weigh out 74.2640 g of research grade dried Potassium Chloride (KCl). Dissolve it in 1000 ml of deionized water 16
Error Displays Mode/ Main Secondary Reasons Measurement Display Display Uncompensated OuE 5.0 ~ 90.0 C Uncompensated conductivity is out of range conductivity OuE OuE/Und Uncompensated conductivity is out of range and the temperature is out of 5.0 ~ 90 C range. Compensated OuE 5.0 ~ 90.0 C Compensated conductivity conductivity is out of range. OuE OuE/Und Compensated conductivity is out of range and the temperature is out of the 5.0 ~ 90 C range LEr 5.0 ~ 90.0 C Temperature exceeds the limit of allowed calculation using the set temp. coeff. and temp. reference). TDS OuE 5.0 ~ 90.0 C TDS value is out of range. OuE OuE/Und TDS value is out of range and the temperature is out of the 5.0 ~ 90 C range LEr 5.0 ~ 90.0 C Temperature exceeds the limit of allowed calculation using the set temp. coeff. and temp. reference). Salinity OuE 5.0 ~ 90.0 C Salinity value is out of range. OuE OuE/Und Salinity value is out of range and the temperature is out of the 5.0 ~ 90 C range Cell constant Und Cell constant calibration Calibration is greater than ±30% of the cell constant. Temperature OuE OuE/Und Temperature is out of the Measurement 5.0 ~ 90 C range. 17
Recycling Information and Instructions on Disposal and Repairs Packaging that is no longer required must be disposed of at the local waste disposal facility. The packaging is made of environmentally friendly materials that can be used as secondary raw materials. The equipment, including accessories and batteries, does not belong in your regular household waste. The EU legislation requires its Member States to collect electrical and electronic equipment and disposed of it separately from other unsorted municipal waste with the aim of recycling it. In Germany and many other countries, Denver Instrument takes care of the return and legally compliant disposal of its electrical and electronic equipment on its own. These products may not be placed with the household waste or brought to collection centers run by local public disposal operations not even by small commercial operators. In countries that are not members of the European Economic Area (EEA) or where no Denver Instrument affiliates, subsidiaries, dealers or distributors are located, please contact your local authorities or a commercial disposal operator. Prior to disposal and/or scrapping of the equipment, any batteries should be removed and disposed of in local collection boxes. Denver Instrument, its affiliates, subsidiaries, dealers and distributors will not take back equipment contaminated with hazardous materials (ABC contamination) either for repair or disposal. Please refer to the accompanying leaflet/manual or visit our Internet website for comprehensive information that includes our service addresses to contact if you plan to send your equipment in for repairs or proper disposal. For disposal in Germany and in the other Member States of the European Economic Area (EEA), please contact our service technicians on location or our Service Center: Denver Instrument GmbH Robert-Bosch-Breite 10 37079 Goettingen, Germany Tel: +49-551-20977-30 Fax: +49-551-20977-39 18
Specifications Display Conductivity Conductivity Accuray TDS Range Resolution (TDS constant = 0.5) Conductivity 0~19.99 µs/cm 0.01 µs/cm 0.10 µs/cm 0~9.99 mg/l (Cell constant 20.0~199.5 µs/cm 0.1 µs/cm 1.0 µs/cm 9.99~99.9 mg/l K = 0.1) 200~1990 µs/cm 1 µs/cm 10 µs/cm 99.9~999.9 mg/l Conductivity 0~199.9 µs/cm 0.1 µs/cm 1.0 µs/cm 0~99.9 mg/l (Cell constant 200~1995 µs/cm 1 µs/cm 10 µs/cm 99.9~999.9 mg/l K = 1.0) 2.00~19.90 ms/cm 0.01 ms/cm 0.10 ms/cm 0.99~9.99 g/l Conductivity 0~1999 µs/cm 1 µs/cm 10 us/cm 0~999.9 mg/l (Cell constant 2.000~19.95 ms/cm 0.01 ms/cm 0.10 ms/cm 0.99~9.99 g/l K = 10.0) 20.00~199.0 ms/cm 0.1 ms/cm 1.0 ms/cm 9.99~99.9 g/l Display Range Resolution Accuracy TDS 0 99.9 g/l 0.01 mg/l ±5% max value of the sub range Salinity 0.0~70.0 ppt 0.1 ppt ±1% FS Temperature 5.0~90.0 C 0.1 C ±0.5 C Temperature sensor ATC, 10kO, at 25 C Cell constant Reference temperature 0.1, 1.0, 10, default 1.0 ; user-adjustable From 15.0 to 25.0 C, default 25.0 C; user-adjustable Temperature coefficient From 0.00 to 4.00%, default 1.91%; user adjustable K value From 70% to 130% of the basic cell constant for the sensor TDS constant From 0.30 to 1.00, default 0.5; user-adjustable Setup parameters for backup Yes Calibration backup Yes Automatic temperature compensation Yes Audio feedback All touch keys Power supply 4 AA batteries Ambient temperature 0 to 50 C Relative humidity 0 to 90% Weight (batteries not included) 1.0 lbs (~320 g) Dimensions 205 mm + 80 mm + 30 mm 19
C Marking The CR meter complies with the following EC Directives and European Standards: Directive 2004/108/EC: Electromagnetic compatibility (EMC) EN 61326-1 Electrical equipment for measurement, control and laboratory use EMC Requirements Part 1: General requirements Defined immunity to interference: Industrial areas, continuous, unmonitored operation Limitation of emissions: Residential areas, Class B Directive 2006/95/EC: Electrical equipment designed for use within certain voltage limits Applicable European Standards: EN 61010 Safety requirements for electrical measurement, control, and laboratory equipment Part 1: General requirements If you use electrical equipment in installations and under ambient conditions subject to stricter safety standards than those described in the manual, you must comply with the provisions as specified in the applicable regulations for installation in your country. Important Note: The operator shall be responsible for any modifications to Denver Instrument equipment or connections of cables not supplied by Denver Instrument and must check and, if necessary, correct these modifications. On request, Denver Instrument will provide information on the minimum operating specifications (in accordance with the Standards listed above for defined immunity to interference). 20
Copyright by Denver Instrument GmbH, Goettingen, Germany. All rights reserved. No part of this publication may be reprinted or translated in any form or by any means without the prior written permission of Denver Instrument GmbH. Status: March 2009, Denver Instrument GmbH, Goettingen, Germany. The status of the information, specifications and illustrations in this manual is indicated by the date given below. Denver Instrument GmbH reserves the right to make changes to the technology, features, specifications, and design of the equipment without notice. 21
North and South America: Denver Instrument, Inc 6542 Fig Street Arvada, Colorado 80004 1-800-321-1135 Tel: 303-431-7255 Fax: 303-423-4831 U.K. and Ireland: Europe, Asia and Australia: www.denverinstrument.com Denver Instrument Company Denver House, Sovereign Way Trafalgar Business Park Downham Market Norfolk PE38 9SW England Tel: +44-136-63862-42 Fax: +44-136-63862-04 Denver Instrument GmbH Robert-Bosch-Breite 10 37079 Goettingen, Germany Tel: +49-551-20977-30 Fax: +49-551-20977-39 W1A000 KT Publication No. WCR6004-am09031 98648-017-46