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

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 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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Meter Description

1.Battery Compartment

2.Display

3.Keypad

4.Electrode

5.Electrode protective cap

Display Description

1.Data Hold icon

2.Microand 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 to power ON the meter. The meter display will 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 for at least 2 seconds. The display will briefly 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 Ranges
Range 1	0 to 1999 µS
Range 2	0 to 19.99 mS

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 oC (this nominal value is 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 25oC (this nominal 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 (microand 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.

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