Extech Instruments EC150 User Manual

2 EC150-EU-EN-V2.0-9/11
Introduction
Congratulations on your purchase of the Extech Pen Style Water Quality instrument; the Model
EC150 measures Conductivity and TDS (Total Dissolved Solids) plus Temperature. The instrument
is housed in an IP65 Water-proof enclosure for safety. This instrument is shipped fully tested and
calibrated and, with proper use, will provide years of reliable service.
Features
 Automatic Ranging and Manual Ranging capability
 Dual Display with ATC (automatic temperature control)
 Data hold for freezing displayed readings
 Low battery indicator
 Automatic power-off for maximum battery efficiency

Switchable temperature units of measure (C/F
)
 Multi-point and one-touch calibration features
 Powered by four (4) LR44 batteries
Supplied Materials
 EC150 meter
 Four (4) LR44 button batteries

Operation manual (hard copy, mini-disk)
Battery Installation
The meter is shipped with the four (4) LR44 button batteries
removed. The user must install the batteries before the meter
can be used. Refer to accompanying diagram.
1. Unscrew the battery
compartment cover (top of meter) in a counter-
clockwise direction. Please do not discard the black
washer.
2. Install the four (4) LR44 button
batteries, carefully orienting the batteries and
observing polarity.
3. Replace the battery
compartment cover.
4. Please remove the batteries while the meter is not in use for long
periods.
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Extech Instruments EC150 Specifications

Measurement Ranges

conductivity range	0 to 1999µS and 0 to 19.99mS
TDS range	0 to 1999ppm and 0 to 19.99ppt

Accuracy and Resolution

conductivity and TDS accuracy	1% Full Scale ±1digit
conductivity resolution	1µS and 0.01mS
TDS resolution	1ppm and 0.01ppt
temperature accuracy	±0.5°C
temperature resolution	0.1°C/°F

Power

auto power off	After 20 minutes of inactivity
power supply	Four (4) LR44 ‘button’ batteries

Dimensions

dimensions	165 x 35 x 32mm (6.5 x 1.4 x 1.3”)