Extech EC400 Operating 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.
®
off automatically after 10 minutes of
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.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts
and workmanship for one year from date of shipment (a six month limited warranty applies to
sensors and cables). If it should become neces sary to return the instrument for service during or
beyond the warranty period, contact the Customer S ervice Department at (781) 89 0-7440 ex t. 210
for authorization or visit our website www.extech.com for contact information. A Return
Authorization (RA) number must be iss ued be fore any product is returned to Extech. The s end er is
responsible for shipping charges, freight, insur ance and proper packaging to prevent damage in
transit. This warranty does not apply to defects resulti ng from action of the user such as misuse,
improper wiring, operation outside of specification, improper maintenance or repair, or
unauthorized modification. Extech spec ifically disclaims any implied warr anties or merchantability
or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or
consequential damages. Extech's t otal liability is limited to repair or replace ment of the product.
The warranty set forth above is inclusive and no other warranty, whether written or oral, is
expressed or implied.
Support line (781) 890-7440
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
®
EC400 V2.0 6-08-05 2
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
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