EUTECH INSTRUMENTS FIELD PHORPCONDUCTIVITY MONITORS Manuel utilisateur

Instruction Manual

24-hour Continuous

Field Monitors

pH, ORP, and Conductivity

Technolo

ade

68X254901

Rev. 5 08/03

Technolo

ade

68X254901

Rev. 5 08/03

Preface

This manual serves to explain the use for all models of the Field Monitors for pH,

ORP, and Conductivity (each model sold separately). If there are doubts in the use

of this meter, please do not hesitate to contact the Authorized Distributor.

Eutech Instruments/ Oakton Instruments cannot accept any responsibility for damage

or malfunction to the meter caused by improper use of the instrument.

The information presented in this manual is subject to change without notice as

improvements are made, and does not represent a commitment on the part of Eutech

Instruments Pte Ltd/ Oakton Instruments.

Note: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the right to

make improvements in design, construction, and appearance of our products

without notice.

Eutech Instruments Pte Ltd

Oakton Instruments

Rev.5 08/03

TABLE OF CONTENTS

1INTRODUCTION..........................................................................................................................................1

2FRONT PANEL .............................................................................................................................................1

2.1 KEYS FOR PHMONITOR ............................................................................................................................1

2.2 KEYS FOR ORP MONITOR ........................................................................................................................1

2.3 KEYS FOR CONDUCTIVITY MONITOR .......................................................................................................1

3CONNECTING THE PROBE......................................................................................................................2

3.1 TO CONNECT THE PHOR ORP PROBE:.......................................................................................................2

4PH CALIBRATION.......................................................................................................................................3

4.1 IMPORTANT INFORMATION ON PHMONITOR CALIBRATION......................................................................3

4.2 PHCALIBRATION ......................................................................................................................................4

5ORP CALIBRATION....................................................................................................................................5

5.1 IMPORTANT INFORMATION ON ORP MONITOR CALIBRATION...................................................................5

5.2 ORP CALIBRATION ...................................................................................................................................6

6CONDUCTIVITY CALIBRATION.............................................................................................................7

6.1 IMPORTANT INFORMATION ON CONDUCTIVITY/TDS MONITOR CALIBRATION .........................................7

6.2 CONDUCTIVITY CALIBRATION ..................................................................................................................8

7MONITORING..............................................................................................................................................9

8ELECTRODE CARE AND MAINTENANCE ...........................................................................................9

8.1 PH/ORP ELECTRODE STORAGE .................................................................................................................9

8.2 PH/ORP ELECTRODE CLEANING..............................................................................................................10

8.3 CONDUCTIVITY ELECTRODE....................................................................................................................10

9TROUBLE-SHOOTING GUIDE...............................................................................................................10

10 ERROR MESSAGES...............................................................................................................................11

11 SPECIFICATIONS..................................................................................................................................12

12 METERS AND ACCESSORIES ............................................................................................................13

13 WARRANTY............................................................................................................................................15

14 RETURN OF ITEMS...............................................................................................................................15

1 INTRODUCTION

Thank you for purchasing this pH, ORP, or Conductivity Field Monitor.

The Field Monitor Series feature microprocessor technology, which gives it many

reliable, user-friendly features. These monitors were designed for long-term low-

maintenance use. Just plug in the AC adapter, calibrate and the unit is ready for

continuous monitoring. No batteries required.

2 FRONT PANEL

The front panel consists of a 3-digit LED display, 2 keys for the pH Monitor, 4 keys for

the ORP Monitor, and 3 keys for the Conductivity Monitor.

2.1 Keys for pH Monitor

CAL The CAL key switches monitor into calibration mode

from measurement mode. In calibration mode CAL

switches monitor back to measurement mode. See

page 3 for details.

ENTER Press the ENTER key to confirm the calibration while

in calibration mode.

2.2 Keys for ORP Monitor

CAL The CAL key switches monitor into calibration mode

from measurement mode. In calibration mode CAL

switches monitor back to measurement mode. See

page 5 for details.

ENTER Press the ENTER key to confirm the calibration while

in calibration mode.

SThe SUp/Increment key scrolls value up in

calibration mode.

TThe TDown/Decrement key scrolls value down in

calibration mode.

2.3 Keys for Conductivity Monitor

CAL The CAL key switches monitor into calibration mode

from measurement mode. In the calibration mode,

pushing CAL key confirms the calibration value and

returns to measurement mode. See page 7 for details.

SThe SUp/Increment key scrolls value up in

calibration mode.

TThe TDown/Decrement key scrolls value down in

calibration mode.

Pressing Sand Ttogether while in calibration mode

switches the monitor back to measurement mode from calibration mode.

pH FM1

Continuous Monitor

CAL ENTER

ORP FM1

Continuous Monitor

CAL ENTER

CON FM1

Continuous Monitor

CAL

3 CONNECTING THE PROBE

The pH or ORP monitor uses any standard pH or ORP electrode with a BNC

connector. The probe for the Conductivity monitor is hard-wired into the unit, no

connection is necessary.

NOTE: Keep connector dry and clean. Do not touch connector with soiled hands.

3.1 To connect the pH or ORP probe:

Slide the BNC connector of the probe over the BNC connector socket on the monitor.

Make sure the slots of the connector are in line with the posts of the socket. Rotate

and push the connector clockwise until it locks. See Figure 1.

pH FM1

Continuous Monitor

CAL ENTER

7.0

Push in the BNC

connector and turn

to tighten it.

Push in the power

adapter plug to

connect the power supply

pH Electrode

Protection bottle for pH electrode

Power

Adapter

Figure 1 - Connection diagram for Field Monitor

To remove probe, push and rotate the connector counter-clockwise. While holding

onto the metal part of the connector, pull probe away from the meter.

CAUTION: Do not pull on the probe cord or the probe wires might disconnect.

4 pH CALIBRATION

This section is applicable for the following models:

•Eutech Instruments: EC-PHFM1ST11 & EC-PHFM1ST21

•Oakton Instruments: 35623-00, and -05 only

4.1 Important Information on pH Monitor Calibration

This monitor has 3 pH calibration points: 4, 7 and 10 with automatic buffer

recognition. For best accuracy, calibrate to all 3 pH points close to the temperature of

the solution you will be monitoring, starting with pH 7. We recommend that you

perform at least a 2-point calibration—at pH 7 first followed by pH 4 or pH 10

depending on the range of the operation. You can also perform a 1-point calibration,

but make sure that the buffer value is close to the sample value you are measuring.

Calibration should be performed regularly to ensure accuracy. Frequency of

calibration will vary and should be checked regularly until the required schedule has

been determined.

Be sure to remove the protective electrode storage bottle or rubber cap of the probe

before calibration or measurement. If the electrode has been stored dry, wet the

probe in tap water for 10 minutes before calibrating or taking readings to saturate the

pH electrode surface and minimize drift.

Do not reuse buffer solutions after calibration. Contaminants in the solution can affect

the calibration, and eventually the accuracy of the measurements.

NOTE: All new calibration data will over-ride existing calibration data.

Immerse pH electrode into

buffer solution,

for example, pH 7

Press

4.2 pH Calibration

1. Plug in the pH monitor to turn on. The monitor will

be in pH measurement mode.

2. Rinse the probe thoroughly with de-ionized water or

a rinse solution. Do not wipe the probe; this causes

a build-up of electro-static charge on the glass

surface.

3. Dip the probe into the calibration buffer pH 7. The

end of the probe must be completely immersed into

the sample. Stir the probe gently to create a

homogeneous sample.

4. Press the CAL key to enter the calibration mode.

"CA" will flash on the display for a second and then

a value close to pH 7.0 will flash.

5. Let the electrode soak in the buffer until reading is

stable, stirring occasionally (time will vary

depending on temperature and electrode

condition). When the display has flashed the same

pH value for 15 seconds or more, press the ENTER

key. "CO" will flash on the display. The reading

should now display pH 7.0. See Figure 2.

If necessary, repeat steps 2 through 5 for the

remainder of the buffer values (pH 4.0 and 10.0).

Figure 3 - pH

Calibration

5 ORP CALIBRATION

This section is applicable for the following models:

•Eutech Instruments: EC-ORPFM1ST11 & EC-ORPFM1ST21

•Oakton Instruments: 35649-00 and -05 only

5.1 Important Information on ORP Monitor Calibration

Typically ORP measurements are taken on a relative basis and calibration is not

required. This monitor has ±100 mV offset adjustment, adjustable in 5 mV

increments. Choose a calibration standard that is close to your working condition.

Calibration should be performed regularly to ensure accuracy. Frequency of

calibration will vary and should be checked regularly until the required schedule has

been determined.

Be sure to remove the protective electrode storage bottle or rubber cap of the probe

before calibration or measurement. If the electrode has been stored dry, wet the

probe in tap water for 10 minutes before calibrating or taking readings to saturate the

ORP electrode surface and minimize drift.

Do not reuse calibration solutions after calibration. Dispose of any used calibration

solution. Contaminants in the solution can affect the calibration, and eventually the

accuracy of the measurements.

IMPORTANT: ORP offset adjustment is limited to ±100 mV from the original reading.

Adjustable in 5 mV increments.

NOTE: All new calibration data will over-ride existing calibration data.

5.2 ORP Calibration

1. Plug in the ORP monitor to turn on. The monitor will

be in ORP measurement mode.

2. Rinse the probe thoroughly with de-ionized water or

a rinse solution. Do not wipe the probe; this causes

a build-up of electro-static charge on the surface.

3. Dip the probe into the calibration standard. The end

of the probe must be completely immersed into the

sample. Let probe soak 2 to 5 minutes or until

readings stabilizes.

4. Press the CAL key to enter the calibration mode.

"CA" will flash on the display for a second and then

a value close to the calibration standard will flash.

5. Press the Sor Tkeys to adjust the display to

match the calibration standard value. Press the

ENTER key. "CO" will flash on the display. The

reading should now display the same value as the

calibration standard. See Figure 3.

Immerse ORP electrode into

a calibration standard solution,

for example, 255 mV

Press

Figure 5 - ORP

Calibration Procedure

6 CONDUCTIVITY CALIBRATION

This section is applicable for the following models:

Description Eutech Instruments Oakton Instruments

Conductivity FMCON 1 with Conductivity

electrode and 110/120 VAC power adapter. EC-CONFM1ST11 35660-00

Conductivity FMCON 1 with Conductivity

electrode and 220/230 VAC power adapter. EC-CONFM1ST21 35660-05

Conductivity FMCON 2 with Conductivity

electrode and 110/120 VAC power adapter. EC-CONFM2ST11 35660-02~

Conductivity FMCON 2 with Conductivity

electrode and 220/230 VAC power adapter. EC-CONFM2ST21 35660-07~

Conductivity FMCON 3 with Conductivity

electrode and 110/120 VAC power adapter. EC-CONFM3ST11 35660-04~

Conductivity FMCON 3 with Conductivity

electrode and 220/230 VAC power adapter. EC-CONFM3ST21 35660-09~

6.1 Important Information on Conductivity/TDS Monitor Calibration

This monitor has ±30% adjustment. Adjustable in 0.1 mS increments. Choose a

calibration standard that is close to your working solution.

Calibration should be performed regularly to ensure accuracy. Frequency of

calibration will vary and should be checked regularly until the required schedule has

been determined.

Do not reuse calibration solutions after calibration. Dispose of any used calibration

solution. Contaminants in the solution can affect the calibration, and eventually the

accuracy of the measurements.

NOTE: All new calibration data will over-ride existing calibration data. Minimum

calibration value is 2.5 mS.

Adjustments and Minimum Calibration Value are according to specific conductivity

meter model:

Models Calibration Adjustments Minimum Calibration Value

FM CON 1 0.1 mS increments 2.5 mS

FM CON 2 10 µS increments 250 µS

FM CON 3 1 µS increments 37.5 µS

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