Extech Extech EC400 Manual

User's Guide

ExStik® EC400

Conductivity / TDS / Salinity / Temperature
Meter

MODE
HOLD

Introduction

Congratulations on your purchase of the ExStik® EC400 Conductivity/Total Dissolved
Solids (TDS) / Salinity / Temperature meter. With the EC400’s dynamic cell-constant
technology it is possible to measure a wide range of Conductivity, TDS, and Salinity with
the same electrode. Careful use and maintenance will provide years of reliable service.

Powering the ExStik™

The ExStik® uses four (4) CR2032 Lithium Ion Batteries (included). If the batteries are
weak, the ‘BAT’ indicator appears on the LCD. Press the ON/OFF key to turn the ExStik
on or off. The auto power off feature shuts the ExStik
inactivity to preserve battery life.

Getting Started

• Remove the cap from the bottom of the ExStik to expose the conductivity electrode.

• Before the first use or after storage, rinse the electrode in deionized water and dry.

• For best results, calibrate for conductivity with a standard in the expected range of

the sample. For maximum accuracy calibrate from low conductivity value standards
to high value standards.

• Store dry.

®

off automatically after 10 minutes of

®

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech EC400 Product Info Page

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX [phone] - TestEquipmentDepot.com

Specifications

Display 2000 count LCD with Bargraph
Conductivity ranges 0 to 199.9µS/cm

200 to 1999µS/cm

2.00 to 19.99mS/cm
TDS ranges 0 to 99.9ppm or mg/L
(Variable ratio) 100 to 999ppm or mg/L

Salinity range 0 to 99.9ppm
(Fixed ratio of 0.5) 100 to 999ppm

TDS Ratio 0.4 to 1.0 adjustable
Salinity Ratio 0.5 Fixed
Conductivity ATC 2.0% per
Temperature Range 0.0°C to 90.0
Temperature Resolution 0.1 up to 99.9, 1 >100

Temperature Accuracy ±1°C; 1.8°F (from 0 to 50°C; 32 to 122°F)
±3°C; 5.4°F (from 50 to 90°C; 122 to 194°F)

Conductivity ATC Range 0.0°C to 60.0
Accuracy Conductivity: ±2% full scale

Measurement Storage 25 tagged (numbered) readings
Low battery indication ‘BAT’ appears on the LCD
Power Four (4) CR2032 Lithium Ion Batteries
Auto power off After 10 minutes (override available)
Operating conditions -5°C to 50
Dimensions 40 x 187 x 40 mm (1.6 x 7.4 x 1.6”)
Weight 87 g (3.1 oz)

1.00 to 9.99ppt or g/L

1.00 to 9.99ppt

o

C

o

C (32.0°F to 194oF)

o

C (32.0°F to 140oF)

TDS: ±2% full scale
Salinity: ±2% full scale

o

C (23°F to 122oF)

EC400 V2.0 6-08-05 3

Meter Description

Front Panel Description

1. Battery compartment

2. LCD Display

3. MODE/HOLD button (change mode, Hold and
store data)

4. CAL/RECALL button (Calibration, change
temperature units and recall data.

5. ON/OFF button

6. Electrode Collar

7. Electrode

(Note: The Electrode cap is not shown)

LCD Display

1. Bargraph display

2. Measurement units

3. Main display

4. Range calibration and
low battery indicators

5. Temperature display

6. Reading Hold Indicator

6

EC400 V2.0 6-08-05 4