Instruction Manual Salt 6 Hand-held Salinity Meter 68X243619 Technology Made Easy ... Rev 1 01/04 Preface This manual serves to explain the use of the Salt 6 salinity meter. It functions in two ways: first as a step by step guide to help you operate the meter; second, it serves as a handy reference guide. This manual is written to cover as many anticipated applications of the Salt 6 salinity meter as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments/ Oakton Instruments Authorized Distributor. Eutech Instruments/ Oakton Instruments will not accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument. The information presented in this manual is subjected to change without notice as improvements are made, and does not represent a commitment on the part of Eutech Instruments Pte Ltd/ Oakton Instruments. Copyright © 2002 Eutech Instruments Pte Ltd/ Oakton Instruments All rights reserved. Rev 1 01/04 TABLE OF CONTENTS 1 2 INTRODUCTION DISPLAY & KEYPAD FUNCTIONS 2.1 Display 2.2 Keypad PREPARATION 3.1 Inserting & Removing Rubber Boot 3.2 Inserting the Batteries 3.3 Battery Replacement 3.4 Conductivity Electrode Information 3.5 Connecting the Probe to Meter 3.6 Switching the Meter On 3.7 Change Salinity Temperature Measurement Mode CALIBRATION 4.1 Important Information on Meter Calibration 4.2 Preparing the Meter for Calibration 4.3 Calibration for Salinity (% or ppt) 4.4 Temperature Calibration MEASUREMENT 5.1 With Automatic Temperature Compensation (ATC) 5.2 Without ATC (Manual Temperature Compensation) 5.3 Taking Measurements 5.4 HOLD Function ADVANCED SETUP FUNCTIONS 6.1 Advanced Setup Overview Temperature Coefficient 6.2 6.3 Normalization Temperature 6.4 Selection of ppt or PrSn. (Default being PrSn) 6.5 Restore Factory Default Values PROBE CARE AND MAINTENANCE TROUBLE-SHOOTING GUIDE ERROR MESSAGES SPECIFICATIONS ACCESSORIES ADDENDUM 1: CALIBRATION TIPS WARRANTY RETURN OF ITEMS 3 4 5 5 5 6 6 8 9 10 11 11 12 13 14 15 15 16 17 18 19 19 21 22 23 24 25 26 27 29 30 31 32 33 1 3 3 4 5 6 7 8 9 10 11 12 13 14 Instruction Manual Salt 6 1 INTRODUCTION Thank you for purchasing the Salt 6 Salinity meter. These economy microprocessor-based handheld meters deliver up to ±0.5% full-scale accuracy. It has a large custom LCD (Liquid Crystal Display) for clear and easy reading. The Salt 6 meter measures the amount of Sodium Chloride (NaCl) concentration either in Percentage (%) or Parts Per Thousand (ppt), and Temperature (°C). Your meter includes a conductivity electrode (cell constant K = 1.0) with built-in temperature sensor (Order Code: EC-CONSEN91B/ 35606-55), a rubber boot, 4 alkaline "AAA" batteries, instruction manual and warranty card. Please read this manual thoroughly before operating your meter. To order other accessories and buffer standard solutions, please refer to the Accessories Section for more information. 1 Instruction Manual Salt 6 Salt 6 % Salinity Meter ON OFF CAL HOLD ENTER MODE 2 Instruction Manual Salt 6 2 2.1 DISPLAY & KEYPAD FUNCTIONS Display The meter has a large custom LCD that consists of 4-digit segments and operation annunciators for ppt or %, and °C (Temperature). Other annunciators include "HO" (when the HOLD function is activated) and "LO" (low battery condition). 6 5 4 % °C ppt 3 2 HO LO 1 LCD and Customized Annunciators for Salt 6 salinity meter 1. Primary display 4. Percentage indicator for Concentration and Temperature Coefficient. Low battery indicator. Hold (freezed) indicator. reading 2. 3. Parts Per Thousand (ppt) Temperature indicator 5. 6. 3 Instruction Manual Salt 6 2.2 Keypad The Salt 6 salinity meter has 6 keys on its splash-proof keypad; ON/OFF, HOLD/ENTER CAL, MODE, and keys. Some buttons have several functions depending on its mode of operation. ON OFF · Powers on and shuts off the meter. Takes you directly into measurement mode when meter is switched on. Enters into calibration mode for % (or ppt) and Temperature. To abort calibration or setup mode without confirming any set value. CAL · · HOLD ENTER HOLD: Freezes the measured reading. To activate, press HOLD key while in measurement mode. To release, press HOLD key again. ENTER: Press to confirm values in calibration mode, and to confirm selections in SETUP mode. · · In Calibration Mode: Press to scroll through calibration values. In Setup Mode: Press to scroll through the setup sub-group programmes. MODE · · Selects measurement mode for salinity and Temperature. When pressed together with ON/OFF key, it will take you into the SETUP mode. This allows you to customize meter preferences such as selecting electrode's normalization temperature, temperature coefficient factor, and resetting the meter to factory default. 1) Normalization Temperature 2) Temperature Coefficient Factor 3) Selection of ppt or % measurement mode (ppt or PrSn 4) User reset 4 Instruction Manual Salt 6 3 3.1 PREPARATION Inserting & Removing Rubber Boot 1) To remove meter from rubber boot, push out from the bottom edges of meter until it is completely out of boot. Ensure that the cables of Conductivity electrode or temperature probe are not connected. To insert meter into rubber boot, slide in from the top of meter before pushing the bottom edges of meter down to set it into position. Lift up the stand at the back of meter for bench top applications if necessary. 2) 3.2 Inserting the Batteries The battery compartment is found at the back of instrument as shown. To open the battery compartment: 3) 4) 5) Push in the direction of arrow and lift up the cover. Note the polarity of battery before inserting into position. After replacement, place cover back and press down until it locks tight. 5 Instruction Manual Salt 6 3.3 Battery Replacement A "LO" annunciator in the LCD alerts you when battery power is running low. Replace with the same type as recommended by the manufacturer. LO % "LO" Battery Condition Caution: Power off the meter when changing battery. 3.4 Conductivity Electrode Information The Salt 6 salinity hand-held meter is supplied with a electrode with a BNC connector. This electrode (Order Part Number: EC-CONSEN91B/ 35606-55) comes with Stainless Steel rings, cell constant of K = 1.0, and a builtin temperature sensor for Automatic Temperature Compensation (ATC). Its specially designed Ultem-body housing has good chemical resistant properties. It provides fast temperature response and reduces air entrapment, which makes it easy to obtain accurate, stable readings. The probe materials used which have good chemical durability include: 1. 2. 3. Polyetherimide (Ultem) ­ protective probe guard Polybutylterphalate (Valox) ­ sensor housing Stainless Steel (SS 304) ­ 2 steel bands 6 Instruction Manual Salt 6 Proper use of probe is essential to ensure that the optimum measurement is taken in a short time. The removable protective plastic probe guard is meant for simple periodic maintenance and it must be kept in tact during measurement and calibration. Always immerse the probe beyond upper steel band. NOTE: 1) 2) DO NOT remove the protective probe guard during measurement and calibration as it may affect your readings. We recommend that you do not submerge the probe above the protective guard. You can submerge the cable for brief periods of time, but not continuously. See Section 7 - Probe Care and Maintenance" for more information. 7 Instruction Manual Salt 6 3.5 1) 2) 3) 4) Connecting the Probe to Meter To connect electrode into meter, align the connector slots with the posts of meter's socket and rotate connector clockwise until it locks. To remove, simply rotate the connector in anti-clockwise direction until it unlocks, and slide the connector off the socket. Insert the mini phono jack of temperature sensor into the socket on the meter as shown in Figure below. Unplug the phono jack when not in use or when you want to measure Conductivity or TDS without any temperature compensation (Manual Temperature Compensation, see Section 5.2). CAUTION: Do not pull or force on the probe cord or the probe wires might disconnect. NOTE: Keep connectors clean. Do not touch connector with soiled hands. BNC connector for conductivity probe Phono jack for Temperature probe Connection for Conductivity & Temperature Probes 8 Instruction Manual Salt 6 3.6 Switching the Meter On When switching the meter on, it will go through a series of displays, showing the various setup parameters. % ON OFF °C ppt JKT HO LO MAX MIN pH % % °C ° F mS µ pptmV Measurement Mode (when probe is held in air) 1) 2) 3) 4) Press ON/OFF key to power up your meter. The first screen shows [SAL 6] which is the meter's name. Second screen shows [C 1.0] which is the conductivity cell constant, k. Cell constant value is fixed, k=1.0. Third screen shows [t 25.0 °C] which is the Normalization Temperature. You can set Normalization Temperature at either 25 °C or 20 °C. Refer to Section on Advance Setup. Default value is 25 °C. Fourth screen shows [t 2.1%] which is the Temperature Coefficient. You can customize the meter with different Temperature Coefficient value from 0.0 to 3.0 %/°C from the Advance Setup mode. Default value is 2.1 %/°C. All LCD segments will light up for 2 seconds, and change into measurement mode. When the probe is held in the air and not in contact with liquid, the value displayed may be [Ur]. You are now ready for conductivity measurement. 5) 6) 7) 9 Instruction Manual Salt 6 3.7 Change Salinity Temperature Measurement Mode To switch between Salinity measurement mode and Temperature measurement mode, simply press the MODE key. The customized annunciator helps indicate the measurement parameter you are in. Annunciator °C ppt MODE 10 Instruction Manual Salt 6 4 4.1 CALIBRATION Important Information on Meter Calibration The Salt 6 meter has a special built-in algorithm to linearize for the measurement of Sodium Chloride concentration. Therefore the specified accuracies from a One-point calibration anywhere in the measurement range, specified accuracies can be applied for the entire measurement range. When you recalibrate your meter, the old calibration will be replaced by the new calibration point. For example, if you previously calibrated your conductivity meter at 2.5% and you recalibrate at 1.0, the meter will replace the old calibration data (2.5%). To completely recalibrate your meter, or when you use a replacement probe, it is best to clear all calibration data. To erase all calibration data completely, see Section 6.5 ­ Restore Factory Default Values. 11 Instruction Manual Salt 6 4.2 Preparing the Meter for Calibration Before starting calibration, make sure you are in the correct measurement mode. Ensure that you use new Sodium Chloride standard solutions during calibration. Do not reuse standard solutions as it may be contaminated and affect the calibration and accuracy of measurements. Use fresh calibration solution each time you calibrate your meter. Store solutions in a dry and cool environment if possible. Always rinse the probe with either deionized water or rinse solution before and after each calibration/sample measurement to avoid cross-contamination. For details please refer to Section 7 - Probe Care and Maintenance. NOTE: These meters are factory set to a temperature coefficient of 2.1% per °C. The factory default value for normalization temperature is 25 °C. If you need to normalize to a value other than 25 °C, see Section 6.3 ­ Normalization Temperature. 12 Instruction Manual Salt 6 4.3 Calibration for Salinity (% or ppt) The following example shows calibration sequence to 2.5% calibration standard. Procedure is similar for both % and ppt measurement mode. 1) 2) If necessary, press MODE key to select measurement mode. Rinse the probe thoroughly with de-ionized water or a rinse solution, then rinse with a small amount of calibration standard. Dip the probe into the calibration standard. Immerse the probe tip beyond the upper steel band (see Section 3.4). Stir the probe gently to create a homogeneous sample. Allow time for the reading to stabilize. Press CAL key to enter salinity calibration mode. The [CA] indicator will appear for 1.5 seconds, and a value will appear flashing. HOLD ENTER Measurement Mode % 3) CAL % 4) % NOTE: To exit calibration without confirmation, press CAL key again to go back to measurement mode. 5) Wait for the value to stabilize and press or key and adjust the value to the calibration standard used. Press the ENTER key. The [CO] indicator will appear for 1.5 seconds, and the calibration is successfully performed. The meter returns to measurement mode. 6) % 13 Instruction Manual Salt 6 4.4 Temperature Calibration °C The Conductivity electrode (EC-CONSEN91B/ 3560655) has a built-in temperature ...