Manual de tds

Contents
Product Overview 1
2 2 Applications for Use Principles of Operation

Cautions and Storage
Cautions Storage 3 3

3

Taking Measurements Instrument Calibration

4 5
5 6 6 7 7 8 8

Calibrating Conductivity Calibrating Temperature Calibrating Pressure Calibrating the pH Function Calibrating Display Contrast

Customizing the Security Passcode Resetting to Default CalibrationValues

Care & Maintenance

9
9 9 9

Replacing the Battery Replacing the pH Probe

Cleaning and Disinfecting

Specifications

10 11
12 12

Replacement Parts
Solutions

Care and Calibration Stations

Limited Warranty Service and Support

13 14

Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in anyform 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 pHprobe (optional accessory). The base unit contains electronic circuitry, a differential pressure transducer, mode switch, liquid crystal display (LCD), and a 9-volt battery. The conductivity/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 (-)pressure port (BLUE)

Conductivity/ temperature 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 thepH 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 negativepressure 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 userinteraction. User prompts guide the user through the calibration process. A liquid may be tested using one of the following methods: In-line Setup for Hemodialysis Delivery Systems

(Conductivity/temperature, pressure, and/or pH)

Sampling (Conductivity/ temperature)

Dip (pH)

NEO-2 Meter User’s Guide 3

Cautions and Storage
Cautions
Verify accurate function of your test instrument beforetaking 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. Usingother 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...