Extech EC410 Instruction Manual
User's Guide
Conductivity Meter
Pen Style Water Quality Meter
Model EC100
Introduction
Congratulations on your purchase of the Extech Pen Style Water Quality instrument; the Model
EC100 measures Conductivity and 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
EC100 meter
Four (4) LR44 button batteries
Operation manual (hard copy, mini-disk, and on-line availability at www.extech.com
)
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 counterclockwise 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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Meter Description
1. Battery Compartment
2. Display
3. Keypad
4. Electrode
5. Electrode protective cap
Display Description
1. Data Hold icon
2. Micro- and milli-Siemens units
3. Primary measurement reading
4. Temperature reading
5. Temperature units of measure
6. Battery strength indicator
7. Calibration icon
Keypad Description
1. Power ON-OFF and SET button
2. Down Arrow, Data Hold, and Calibration button
3. Up arrow
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Operation
Getting Started
1. Remove the probe’s protective cap (bottom of meter) by pulling the cap
firmly downward, away from meter, until it snaps off (see diagram).
2. Press the power button
cycle through several icons (representing the current configuration of the
meter) before settling on the main display as shown in the display
description above.
3. Press and hold the power button to power OFF the meter.
4. This meter is powered by four (4) LR44 buttons batteries. If the meter will
not switch ON please check that fresh batteries are installed.
Automatic and Manual Ranging
There are two ranges available in each measurement mode (see Range table below). The meter
defaults to the AUTO RANGE mode where the range is selected automatically to provide the best
resolution and accuracy for each given measurement. However, MANUAL RANGE can be selected
by pressing and holding the up arrow button
display the ‘man’ icon indicating that the meter is changing to the Manual Range mode and the next
available range will be selected as indicated by the change in the units of measure icon.
Conductivity Measurement and Considerations
Accuracy is given in percent FULL SCALE; Use the lowest range to yield the best accuracy.
The meter’s display will indicate E02 or E03 if the measured value is below (E02) or above
(E03) specified limits of the meter. If this occurs, please select another range as described in the
Manual Range discussion in previous paragraph.
Set the temperature coefficient. The factory default setting is 2.1% per
correct for most applications). Refer to the Setup section of this User Guide for details on
changing this setting. Also refer to Appendix C (Temperature effects) for more information.
Set the normalization (reference) temperature. The factory default setting is 25
value is correct for most applications). Refer to the Setup section and the Appendix C of this
User Guide for more information and instructions on changing this setting.
Rinse the probe with deionized or distilled water before use to remove impurities that may
adhere to the electrode. When the meter has been idle for a long period, soak the electrode for
at least 30 minutes before use.
When dipping the probe into a sample solution, be sure to eliminate air bubbles trapped in the
probe’s slot. To remove air bubbles, give the probe a gentle stir while submerged in the solution.
When taking a measurement, stir the probe gently in the sample to create a homogenous
sample. Allow a few seconds to elapse for the probe and the sample to reach temperature
equilibrium. Ideally, wait 15 minutes to achieve maximum accuracy and best temperature
compensation.
The unit of measure icon will flash on the meter’s display while stabilization is taking place in
measurement mode. When stabilization is achieved, the meter’s icon will stop flashing.
Press the HLD (HOLD) button to freeze a displayed reading. Press again to release the display.
The Conductivity units of measure are µS and mS (micro- and milli-Siemens).
To switch from Auto Range mode (default) to Manual Range mode press and hold the up arrow
button for at least two seconds as described previously.
to power ON the meter. The meter display will
for at least 2 seconds. The display will briefly
Conductivity Ranges
Range 1 0 to 1999 µS
Range 2 0 to 19.99 mS
o
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C (this nominal value is
o
C (this nominal
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