Extech Instruments 3-41450, 3-4145A, 3-41450-P User Manual

User's Guide

Oyster pH - Conductivity - TDS - Temperature Meters

Models
34135-A
341350
341350-P
34145A
341450
341450-P

INTRODUCTION

Congratulations on your purchase of the Extech's Oyster Series meter or meter kit. These
devices measure pH/Conductivity plus TDS or Temperature. These meters are intended for
routine laboratory and field testing. Accurate measurements are provided in a battery
operated, portable meter with a hinged display that can be adjusted to any viewing angle.

Model 34135-A measures pH, Conductivity and TDS. The ‘A’ indicates ‘meter-only’.
Models 341350 and 341350-P are kits which include the 34135A and all the necessary

accessories. The ‘P’ indicates Polymer type electrode (341350 has glass electrode).

Model 34145-A measures pH, Conductivity & Temperature. ‘A’ indicates ‘meter-only’.
Models 341450 and 341450-P are kits which include the 34145A and all the necessary

accessories. The ‘P’ indicates Polymer type electrode (341450 has glass electrode).

Version 1.5 August 2001

SPECIFICATIONS

Range (resolution) Accuracy

Conductivity

Temperature (34145-A only) -30 to 105oC ± 0.50C

pH 0.00 to 14.00pH (0.01pH) ± 0.02pH

TDS (34135-A only) 10 - 19,990ppm (10ppm) ± 0.5%

Auto/Manual Temperature
Compensation

Power 9V battery or optional AC adapter

Display 3-1/2 Digit LCD (90 to 180o adjustable viewing angle)

Overrange Indication Automatic (1---) on all ranges

Low Battery Indication Automatic

Dimensions/Weight 3.75 x 4.25 x 2" (96 x 108 x 45mm) / 12 oz (340g)

Accessories supplied 9V battery, plus:

341350 kit pH electrode, pH buffers, bottle, case, glass

341350-P pH electrode, pH buffers, bottle, case, polymer

341450 kit pH electrode, pH buffers, bottle, case, glass

341450-P pH electrode, pH buffers, bottle, case, polymer

10 - 19,990µS (10µS)

Manual for pH/Auto for conductivity/TDS; 0-100oC;

Correction: 2% per

conductivity cell

conductivity cell

conductivity cell, stainless steel temperature probe

conductivity cell, stainless steel temperature probe

o

C

± 0.5%

METER DESCRIPTION

1. LCD display

2. Battery compartment

3. AC adapter input

4. Electrode and Temperature
probe input jacks

5. Electrode

6. Neck-strap fasteners

7. Function keys

1

2

3

4

7

6

5

2

Version 1.5 August 2001