Neo-2 User Manual - DialyGuard
Contents
1. 6 To save your changes press and hold the mode switch for 3 seconds Calibrating Pressure You will first zero pressure then calibrate positive negative pressure as described You will need v Mercury manometer or other pressure standard with 1 mmHg resolution accuracy 2 mmHg or better v In line pressure adapter v Pressure source 1 Enter calibration mode and select ZERO PRESSURE A value will appear with CAL in the upper right corner of the display 2 Open both pressure ports to atmosphere Rotate the mode switch in either direction to automatically adjust to 0 Click the mode switch 3 Rotate the mode switch and select POS NEG PRESSURE A value will appear with CAL in the upper right corner of the display 4 Using the in line pressure adapter connect the positive pressure port the pressure standard and the pressure source as shown Pressure Pressure 5 Create pressure to 800 mmHg and clamp the pressure source line Adjust the reading until it matches that of the pressure standard Remove the clamp to release the pressure 6 Connect the in line pressure adapter to the negative pressure port and repeat step 5 Setup for Pressure Calibration Note that the NEO 2 will display negative pressure 7 To save your changes press and hold the mode switch for 3 seconds NEO 2 Meter User s Guide 7 Calibrating the pH Function pH must be calibrated at three values 4 0 7 02. A liquid may be tested using one of the following methods In line Setup for Hemodialysis Delivery Systems DIALY SATE FLOW Conductivity temperature pressure and or pH Sampling Dip Conductivity pH temperature NEO 2 Meter User s Guide 3 Cautions and Storage Cautions Verify accurate function of your test instrument before taking measurements or whenever inaccurate readings are suspected When calibrating your instrument use a standard that is traceable to the National Institute of Standards and Technology NIST or an equivalent standards organization For conductivity calibration use sodium chloride NaCl standard solution The NEO 2 Meter is temperature compensated for sodium chloride NaCl solution Using other solutions such as potassium chloride KCl may result in inaccurate calibration Do not use the NEO 2 Meter in place of the hemodialysis delivery system s primary sensors controls and or monitors DO NOT use the NEO 2 Meter to test the hemodialysis delivery system while a patient is being dialyzed DO NOT submerge your instrument in liquids DO NOT allow liquids to enter the enclosure or the measurement cell connectors Always use clean dry transducer protectors on the pressure ports to prevent liquids from entering the instrument and damaging the pressure transducer Do not use abrasive cleaning agents and or full strength bleach or acid to clean the base unit or cells as this will cau
3. MESA LABS at the address below Mesa Laboratories Inc 12100 W 6 Avenue Lakewood Colorado USA 80228 RETURN AUTHORIZATION is required for warranty repair THIS WARRANTY DOES NOT COVER 1 Disposable items such as the battery or pH probe 2 Routine calibration or cell cleaning 3 Defects caused by a modification alteration repair or service of the product by anyone other than MESA LABS or an authorized service center b misuse due to negligence or accident c operation or maintenance of the product in a manner contrary to the manufacturer s instructions Any express warranty not provided herein and any remedy for breach of contract that but for this provision might arise by implication or operation of law is hereby excluded and disclaimed The implied warranties of merchantability and of fitness for any particular purpose are expressly limited to the terms mentioned above Some states do not allow limitations on the duration of an implied warranty so the above limitation may not apply to you Under no circumstances shall MESA LABS be liable to the original purchaser or to any other person for any special or consequential damages whether arising out of breach of warranty breach of contract or otherwise Some states do not allow the exclusion or limitation of special or consequential damages so the above exclusion or limitation may not apply to you This warranty gives you specific legal rights and you may also have other
4. and 10 0 You will need v 7 0 4 0 and 10 0 pH buffer solutions v Container such as a glass beaker approx 100 ml or v Sample tray P N 303110001 available from MESA LABS For maximum efficiency prepare three containers with 7 0 4 0 and 10 0 pH buffer solutions as outlined below before beginning Rinse the pH probe with RO water between calibrations with the different pH buffer solutions 1 Unscrew the pH probe from the In Line fitting 2 Rinse a clean dry container with 7 0 pH buffer solution Discard the rinse solution Pour at least 50 ml of fresh solution into the rinsed container 3 Enter calibration mode and select 7 0 PH A value will appear with CAL in the upper right corner of the display 4 Insert the pH probe into the solution and stir in a circular motion to thoroughly hydrate the sensing and reference electrodes When the reading stabilizes rotate the mode switch in either direction to automatically adjust to 7 0 Click the mode switch 5 Select 4 0 AND 10 0 PH A value will be shown with CAL in the upper right corner of the display 6 Rinse a clean dry container with 4 0 pH buffer solution Discard the rinse solution Pour at least 50 ml of fresh solution into the rinsed container Setup for pH Calibration 7 Insert the pH probe into the solution and stir in a circular motion to thoroughly hydrate the sensing and reference electrodes When the reading stabilizes
5. rights that vary from state to state For further warranty information contact Mesa Laboratories Inc NEO 2 Meter User s Guide 14 Service and Support MESA LABS offers full repair and calibration services at its corporate headquarters and authorized service depot locations throughout the world DO NOT attempt to repair or modify the instrument as this will void the warranty Any service required other than battery replacement or calibration must be referred to MESA LABS an authorized distributor or service depot Please contact Mesa Laboratories Inc for further information Write to Mesa Laboratories Inc 12100 W 6 Avenue Lakewood Colorado USA 80228 Telephone 1 800 992 6372 Toll free USA Canada 1 303 987 8000 Fax 1 303 987 8989 Hours 8 00 am 5 00 pm MT Monday Friday E mail medservice mesalabs com Website www mesalabs com
6. tightly capped to avoid evaporation v Take measurements immediately after pouring evaporation will cause errors v Never EVER pour used solution back into the bottle y Discard solution the appropriate number of days after opening the bottle or after the expiration date MESA LABS Care and Calibration Stations provide a fast convenient means for rinsing disinfecting verifying and calibrating your NEO 2 and other meters One way check valves prevent evaporation and contamination of your standard solutions while minimizing waste Used solution is expelled through the check valve to a sink or waste container via a drainage tube Contact MESA LABS or your local distributor for further details 4 Bottle TRI STATION pictured at left Single Rinse Station pictured at right NEO 2 Meter User s Guide 13 Limited Warranty MESA LABORATORIES INC warrants to the original purchaser of the NEO 2 METER that it will repair or replace at its option any malfunctioning or defective part without charge for the terms listed below Parts used for replacement are warranted for the remainder of the original warranty period Mesa Laboratories Inc will provide labor without charge to the original purchaser for a warranty repair PART WARRANTED WARRANTY TERM NEO 2 Meter Conductivity Temperature Cell from date of original purchase TO OBTAIN WARRANTY SERVICE the original purchaser must deliver at its own expense the product to
7. H 4 85 x W 4 1 x D 3 4 1 16 Ibs 525 g Battery 9V Alkaline 12 3 x 10 4 x 8 6 cm Specifications are subject to change without notice NEO 2 Meter User s Guide 11 Replacement Parts The following replacement parts are available from MESA LABS or your local distributor Replacement Parts Part Number 91 0027 91 003 1 Conductivity Temperature Cell 11 9006 Luer Fittings Kit 5 of each 91 0011 fitting Cell Cleaning Kit 02 0029 Description Quantity In Line Adapter Pressure Adapter l CaLIBRATIOM LABEL PH cence 91 0003 1 red 91 0003 2 blue NEO 2 Meter User s Guide Sample tray 11 9050 303110001 NEO 2 Pressure Port Replacement Kit NEO 2 Meter User s Guide 12 Solutions MESA LABS standard solutions are certified traceable to NIST Standard Reference Materials and are sealed with tamper evident packaging TO ORDER CALL 1 800 992 6372 Outside the USA Contact your local distributor Description Value Size Order No Conductivity Standard Solution mS em at 25 C Discard 30 days after opening pH Buffer Reference Standard Solution 0 01 at 25 C Shelf life 18 months Discard 90 days after opening NEO CARE Cell Cleaning Solution Gently yet effectively removes hard deposits and bacterial filming from cell 32 oz 950 ml 02 0028 sensors for greater accuracy and extended instrument life Non toxic 1 gallon 02 0003 Ensure Standard Solution Accuracy Y Keep solutions
8. NEO 2 Meter User s Guide MesaLabs 2009 Mesa Laboratories Inc All rights reserved Contents Product Overview 1 Applications for Use 2 Principles of Operation 2 Cautions and Storage 3 Cautions 3 Storage 3 Taking Measurements 4 Instrument Calibration 5 Calibrating Conductivity 5 Calibrating Temperature 6 Calibrating Pressure 6 Calibrating the pH Function 7 Calibrating Display Contrast 7 Customizing the Security Passcode 8 Resetting to Default Calibration Values 8 Care amp Maintenance 9 Replacing the Battery 9 Replacing the pH Probe 9 Cleaning and Disinfecting 9 Specifications 10 Replacement Parts 11 Solutions 12 Care and Calibration Stations 12 Limited Warranty 13 Service and Support 14 Information in this document is subject to change without notice No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without the express permission of Mesa Laboratories Inc NEO 2 Meter User s Guide 1 Product Overview The NEO 2 Meter is a precision test instrument that measures conductivity temperature pressure and pH of liquids The measurement system is composed of a base unit a conductivity temperature cell pressure sensor and a pH probe optional accessory The base unit contains electronic circuitry a differential pressure transducer mode switch liquid crystal display LCD and a 9 volt battery The conducti
9. g the mode switch in either direction CONDUCTIVITY TEMPERATURE ZERO PRESSURE POS NEG PRESSURE 7 0 PH 4 0 AND 10 0 PH DISPLAY CONTRAST CAL will appear in the upper right corner of the display To exit CALIBRATION mode and save your changes press and hold the mode switch for 3 seconds Calibrating Conductivity Each range must be calibrated separately Use the appropriate solution for each range as shown in the table below Recommended Standard Solution Values mS cm RANGE 020 to 1 999 2 00 to 19 99 20 0 to 199 9 CAUTION Use only sodium chloride NaCl standard solution The NEO 2 Meter s conductivity function 1s temperature compensated for NaCl solution Other solutions such as potassium chloride KCl may result in inaccurate calibration You will need Y Conductivity standard solution v Cell Cleaning Syringe with Female Hansen Female Luer Adapter attached v Clean dry container such as a glass beaker approx 100 ml or v Sample tray P N 303110001 available from MESA LABS 1 Connect the cell cleaning syringe to either conductivity temperature cell Hansen connector 2 Enter calibration mode and select CONDUCTIVITY A value will appear with CAL in the upper right corner of the display 3 Rinse the container with the standard solution you will be using to eliminate contaminants Discard the rinse solution Pour at least 50 ml of fresh
10. ode switch in either direction Take readings when the readings stabilize 3 To manually turn the meter off press and hold the mode switch for 3 seconds Otherwise it will turn off automatically after 30 minutes to preserve battery life To activate the scroll feature While the meter is on click the mode switch SCROLL will appear in the upper right corner of the display and the meter will begin scrolling through each mode in this order conductivity temperature pressure pH The meter will automatically skip CONDUCTIVITY and TEMPERATURE if the cell is not connected To deactivate the scroll feature press or rotate the mode switch 4 Rinse the cell interior pH probe and adapters thoroughly with reverse osmosis RO water after use See Cautions and Storage for storage instructions NEO 2 Meter User s Guide 5 Instrument Calibration Verify accurate calibration of the conductivity temperature pressure and pH functions before use or whenever inaccurate readings are suspected To enter CALIBRATION mode turn the meter on and rotate the mode switch until the display reads CLICK TO ENTER CALIBRATION MODE Click the mode switch Enter security passcode by rotating the mode switch in either direction Click the mode switch NOTE Default security passcode is 10 To change the security passcode refer to Customizing the Security Passcode located in this section Select one of the following by rotatin
11. play replace the battery as soon as possible The instrument will continue to function normally until the battery voltage drops below a critical limit At that time the low battery indicator will be shown on an otherwise blank display and the instrument will turn off after 2 seconds Instrument functions are inoperable when the low battery indicator is the only symbol displayed To replace the battery You will need v Standard or Phillips screwdriver 1 Loosen all four enclosure screws and remove the front cover 2 Remove the battery and replace it with a fresh 9 volt battery observing the proper polarity 3 Replace the cover Take care to align the edges of the front and back covers to ensure proper sealing 4 Tighten the housing screws DO NOT overtighten this may damage the enclosure Replacing the pH Probe If the pH probe is stored properly it will provide several years of trouble free service When the stabilization time becomes long it 1s time to replace it Refer to the Replacement Parts section Cleaning and Disinfecting Base Unit Wipe the exterior of the instrument with a soft damp cloth CAUTION DO NOT submerge your instrument in liquids DO NOT allow liquids to enter the enclosure or the measurement cell connectors Do not use abrasive cleaning agents and or full strength bleach or acid to clean the base unit conductivity temperature cell or pH probe as this will cause damage Conductivity Temperat
12. rotate the mode switch in either direction to automatically adjust to 4 0 Click the mode switch 8 Repeat steps 5 6 with 10 0 pH buffer solution 9 To save your changes press and hold the mode switch for 3 seconds Calibrating Display Contrast Alter the contrast of the display to allow for easier viewing 1 Enter calibration mode and select DISPLAY CONTRAST A random set of two digit values will appear with CAL in the upper right corner of the display 2 Rotate the mode switch clockwise to lighten the display and counterclockwise to darken the display 3 To save your changes press and hold the mode switch for 3 seconds NEO 2 Meter User s Guide 8 Customizing the Security Passcode Change the security passcode to prevent unauthorized calibration Be sure to write down your security passcode in a secure place for future reference You will need v Standard or Phillips screwdriver 1 Turn the meter on and rotate the mode switch until the display reads CLICK TO ENTER CALIBRATION MODE Click the mode switch 2 Loosen all four enclosure screws and carefully remove the front cover 3 Press and hold the white pushbutton located on the back of the circuit board attached to the front cover 4 Rotate the mode switch in either direction until desired security passcode is displayed Release the pushbutton The default security passcode 10 will be displayed 5 Rotate the mode switch
13. se damage Federal law restricts the use of this device to sale by or on the order of a physician Storage Conductivity temperature cell Rinse the cell interior thoroughly with reverse osmosis RO water before storing pH Probe Rinse thoroughly with RO water and store with 4 00 pH buffer solution in In Line Fitting Cap both ends with the caps provided Store your instrument away from extreme temperatures Keep the original packaging in the event the instrument must be returned for service NEO 2 Meter User s Guide 4 Taking Measurements Instrument modes conductivity temperature pressure pH and calibration are capitalized and enclosed in BRACKETS Display symbols and user prompts are capitalized and enclosed in QUOTATIONS Click means to press and release the mode switch once CAUTION Verify calibration of your instrument before each use See Instrument Calibration if calibration 1s needed DO NOT use the NEO 2 Meter to test the hemodialysis delivery system while a patient is being dialyzed 1 Connect the desired cell and or adapters to the instrument Choose one of the following methods DIALYSATE FLOW Sampling Conductivity temperature Dip pH In line Setup for Hemodialysis Delivery Systems Conductivity temperature pressure and or pH 2 Click the mode switch twice to turn the meter on It will turn on in the mode last used Select the desired parameter by rotating the m
14. solution into the rinsed container 4 Insert the unattached Hansen connector into the solution as shown and draw solution through the cell While solution is flowing and when the reading stabilizes adjust the reading until it matches the standard solution value 5 Repeat step 4 to confirm that the displayed reading matches the solution value Cell should be connected to the meter NEO 2 Meter User s Guide 6 6 Repeat steps 3 5 for each conductivity range 7 To save your changes press and hold the mode switch for 3 seconds Calibrating Temperature You will need v NIST traceable Thermometer with 0 1 C resolution accuracy 0 05 C or better v Cell Cleaning Syringe v Temperature controlled circulating solution bath 1 Submerge the thermometer into the solution bath at approximately 25 C and allow reading to stabilize 2 Connect the cell cleaning syringe to either conductivity temperature cell Hansen connector 3 Enter calibration mode and select TEMPERATURE A value will appear with CAL in the upper right corner of the display 4 Insert the unattached Hansen connector into the solution as shown and draw solution through the cell While solution is flowing and when the reading stabilizes adjust the reading until it matches the thermometer reading Cell should be connected 5 Repeat step 4 to confirm that the displayed reading matches the tothe meler thermometer reading
15. until the new customized security passcode is displayed Click the mode switch to enter CALIBRATION mode Press and hold the mode switch for 3 seconds to exit CALIBRATION mode and save the new passcode settings 6 Replace the cover Take care to align the edges of the front and back covers to ensure proper sealing 7 Tighten the housing screws DO NOT overtighten this may damage the enclosure Resetting to Default Calibration Values Resetting to default calibration values will initialize ALL pH and pressure calibration display contrast and security passcode settings You will need v Standard or Phillips screwdriver 1 Turn the meter on and rotate the mode switch to the PRESSURE mode 2 Loosen all four enclosure screws and carefully remove the front cover 3 Press and hold the white pushbutton located on the back of the circuit board attached to the front cover until two short beeps are heard Release the pushbutton immediately upon hearing the two short beeps 4 Replace the cover Take care to align the edges of the front and back covers to ensure proper sealing 5 Tighten the housing screws DO NOT overtighten this may damage the enclosure NEO 2 Meter User s Guide 9 Care amp Maintenance Replacement pH probes accessories and standard solutions are available from MESA LABS or your local distributor Replacing the Battery When the low battery indicator appears in the upper left hand corner of the dis
16. ure Cell When cared for properly the conductivity temperature cell has an indefinite lifespan Periodic cleaning with a mild bleach solution 1 or mild acid such as NEO CARE or vinegar will minimize hard deposits and bacteria from forming on the conductivity temperature cell sensors Deposits on the cell sensors may cause inaccurate readings To disinfect draw a mild bleach solution comprised of 1 part household bleach and 99 parts RO water or NEO CARE Cell Cleaning Solution through the cell using the Cell Cleaning Syringe Allow it remain in the cell for at least 10 minutes Rinse thoroughly with RO water pH Probe Wipe with a mild soap solution Rinse thoroughly with RO water Store with 4 0 pH buffer solution in the In Line Fitting capped on both ends to extend the life of the pH reference electrode In line Adapters Soak in a mild bleach solution for 10 minutes Rinse thoroughly with water NEO 2 Meter User s Guide 10 Specifications Technical Specifications RAE RESOLUTION ACCURACY 100 0 to 199 9 mS 1 0 mS 8 of reading 20 0 to 99 9 mS 0 1 mS 2 0 mS 2 00 to 19 99 mS 0 01 mS 0 1 mS 020 to 1 999 mS 0 001 mS 0 01 mS rene len Gauge 700 to 1000 mmHg 1 mmHg 5 mmHg Differential 1000 to 1500 mmHg 1 mmHg 1 of reading pH lo 1 0 to 12 0 pH units 0 1 pH unit 20 1 pH unit Temperature compensation 15 to 45 C CONDUCTIVITY Physical Specifications WEIGHT POWER 7 BATTERY TYPE
17. vity temperature cell and pH probe connect to the base unit with cables Positive and negative pressure ports are located on the side of the base unit LCD pH probe connector Mode switch Negative Conductivity pressure port temperature BLUE cell connector Conductivity Temperature Cell pH Probe In line pH adapter NEO 2 Meter User s Guide 2 Applications for Use The NEO 2 Meter may be used by hemodialysis personnel to test conductivity temperature pressure and pH of the dialysate solution used with hemodialysis delivery systems The NEO 2 Meter may also be used to test the pH and conductivity of acid and sodium bicarbonate dialysate concentrates and water used in hemodialysis applications Principles of Operation Conductivity and temperature measurements are taken as solution flows through the conductivity temperature cell Differential pressure measurements are taken using an in line adapter that uses plastic tubing to connect to the positive and negative pressure ports pH measurements may be taken using an in line adapter attached to the dialysate line or by directly inserting the pH probe into solution Each measurement may be taken independently of another or simultaneously Measurements are shown on the display The user may view the desired parameter by rotating the mode switch The scroll feature displays readings sequentially without user interaction User prompts guide the user through the calibration process
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