Eutech Instruments FIELD PHORPCONDUCTIVITY MONITORS User Manual
Instruction Manual
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24-hour Continuous
Field Monitors
pH, ORP, and Conductivity
68X254901
Technol o
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68X254901
Rev. 5 08/03
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.
Copyright © 2002 All rights reserved.
Eutech Instruments Pte Ltd
Oakton Instruments
Rev.5 08/03
TABLE OF CONTENTS
1 INTRODUCTION..........................................................................................................................................1
2 FRONT PANEL.............................................................................................................................................1
2.1 KEYS FOR PH MONITOR ............................................................................................................................1
2.2 KEYS FOR ORP MONITOR ........................................................................................................................1
2.3 KEYS FOR CONDUCTIVITY MONITOR .......................................................................................................1
3 CONNECTING THE PROBE......................................................................................................................2
3.1 TO CONNECT THE PH OR ORP PROBE:.......................................................................................................2
4 PH CALIBRATION.......................................................................................................................................3
4.1 IMPORTANT INFORMATION ON PH MONITOR CALIBRATION......................................................................3
4.2 PH CALIBRATION ......................................................................................................................................4
5 ORP CALIBRATION....................................................................................................................................5
5.1 IMPORTANT INFORMATION ON ORP MONITOR CALIBRATION...................................................................5
5.2 ORP CALIBRATION ...................................................................................................................................6
6 CONDUCTIVITY CALIBRATION.............................................................................................................7
6.1 IMPORTANT INFORMATION ON CONDUCTIVITY/TDS MONITOR CALIBRATION .........................................7
6.2 CONDUCTIVITY CALIBRATION ..................................................................................................................8
7 MONITORING..............................................................................................................................................9
8 ELECTRODE CARE AND MAINTENANCE ...........................................................................................9
8.1 PH/ORP ELECTRODE STORAGE .................................................................................................................9
8.2 PH/ORP ELECTRODE CLEANING..............................................................................................................10
8.3 CONDUCTIVITY ELECTRODE....................................................................................................................10
9 TROUBLE-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 lowmaintenance 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.
pH FM1
Continuous Monitor
CAL
ENTER
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.
ORP FM1
S
The S Up/Increment key scrolls value up in
Continuous Monitor
calibration mode.
T
The T Down/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.
S
The S Up/Increment key scrolls value up in
calibration mode.
T
The T Down/Decrement key scrolls value down in
calibration mode.
CON FM1
Continuous Monitor
Pressing S and T together while in calibration mode
switches the monitor back to measurement mode from calibration mode.
CAL
ENTER
CAL
1
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.
Power
Adapter
CAL
ENTER
7.0
pH FM1
Continuous Monitor
Push in the po w er
adapter plug to
connect the power supp ly
Push in the BNC
connector and turn
to tighten it.
Protection bottle for pH electrode
pH Electrode
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.
2
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.
3
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