Extech instruments PH220 User Manual

User’s Guide

Waterproof Palm pH Meter
Model PH220

Introduction

Congratulations on your purchase of the Extech PH220 waterproof pH/mV meter. This
microprocessor-based device with tactile buttons is battery operated and ideal for field
use. The PH220 simultaneously displays pH or ORP (mV) and temperature. The rubber
holster which protects the meter has a magnetic backing for convenient mounting.
Careful use of this meter will provide years of reliable service.

Specifications

Range (Resolution)
mV (ORP) ± 1999 mV DC (1 mV)
Temperature 32.0 to 212.0oF (0.0 to 99.9oC)
pH 0.00 to 14.00pH (0.01pH)
Temperature Compensation 32 to 212oF (0-100oC) Automatic (ATC)
Power 9 volt battery
Display Dual LCD display for simultaneous pH or mV and

temperature readings

Over-range or open indication Displays " ---- " for over-range or open input
pH Calibration points 4.00, 7.00, 10.00
Auto Power OFF After 10 minutes
Low Battery Indication The icon displays no fill bars
Dimensions / Weight 4.25 x 3.00 x 1.18" (108 x 75 x 30mm) / 0.3 lbs (135g)
Accessories supplied with kit Sample buffers, and battery.

Stick electrode for model PH220-S
Electrode with 39” cable for model PH220-C

Accuracy

± 2mV

± 0.5oF (0.3oC)

± 0.02pH

2

Model PH220 Version 2.0 4/05

Meter Description

1. Battery Compartment (under holster)

2. Rubber Holster

3. LCD Display

4. Function buttons

5. Electrode input

Display Description

3

Model PH220 Version 2.0 4/05