METER ES-2 Manual de usuario
ES-2
Electrical Conductivity &
Temperature Sensor
Operator’s Manual
METER Group, Inc. USA
13890-01
ES-2
METER Group, Inc. USA
2365 NE Hopkins Court
Pullman WA 99163
Phone: 509-332-5600
Fax: 509-332-5158
Website: www.metergroup.com
sales.environmen[email protected]
Trademarks
c
2018 METER
All Rights Reserved
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ES-2 CONTENTS
Contents
1 Introduction 1
1.1 Customer Support . . . . . . . . . . . . . . . . . . . . 1
1.2 About This Manual . . . . . . . . . . . . . . . . . . . 1
1.3 Warranty ......................... 2
1.4 Seller’s Liability . . . . . . . . . . . . . . . . . . . . . . 2
2 About the ES-2 3
2.1 Specifications ....................... 3
3 Measurements 5
3.1 Temperature ....................... 5
3.2 Electrical Conductivity . . . . . . . . . . . . . . . . . . 5
4 Calibration 6
5 Connecting Sensors 7
5.1 Connecting to METER Logger . . . . . . . . . . . . . 7
5.2 Connecting to a Non-METER Logger . . . . . . . . . 8
5.3 Pigtail End Wiring . . . . . . . . . . . . . . . . . . . . 8
6 Installation 11
6.1 Pipe Water Monitoring . . . . . . . . . . . . . . . . . . 11
6.2 Tank Water Monitoring . . . . . . . . . . . . . . . . . 11
6.3 Cleaning Method . . . . . . . . . . . . . . . . . . . . . 12
7 Communication 13
7.1 SerialString........................ 13
7.2 SDI-12 Communication . . . . . . . . . . . . . . . . . 13
7.3 Common SDI-12 Commands . . . . . . . . . . . . . . . 14
7.4 SDI-12 Sensor Bus . . . . . . . . . . . . . . . . . . . . 14
7.5 SDI-12 Address . . . . . . . . . . . . . . . . . . . . . . 14
7.6 Power ........................... 15
7.7 Reading .......................... 15
8 Troubleshooting 16
9 Declaration of Conformity 17
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ES-2 1 INTRODUCTION
1 Introduction
METER designed the ES-2 sensor to measure pipe water, tank water
(when used with protective cap).A thermistor in thermal contact
with the probe provides water temperature, while the screws on the
surface of the sensor form a four-electrode array to measure electrical
conductivity. This manual should help you understand the sensor
features and how to use it successfully.
1.1 Customer Support
There are several ways to contact METER if you ever need assis-
tance with your product, have any questions, or feedback. METER
has Customer Service Representatives available to speak with you
Monday through Friday, between 7am and 5pm Pacific time.
Note: If you purchased your sensor through a distributor, please con-
tact them for assistance.
Email:
sales.environmen[email protected]
Phone:
509-332-5600
Fax:
509-332-5158
If contacting us by email or fax, please include as part of your mes-
sage your instrument serial number, your name, address, phone, fax
number, and a description of your problem or question.
1.2 About This Manual
Please read these instructions before operating your sensor to ensure
that it performs to its full potential.
1
1 INTRODUCTION ES-2
1.3 Warranty
This sensor has a 30-day satisfaction guarantee and a one-year war-
ranty on parts and labor. Your warranty is automatically validated
upon receipt of the instrument.
Note: The one year service plan activates when METER ships the
instrument and not at the time of purchase.
1.4 Seller’s Liability
Seller warrants new equipment of its own manufacture against de-
fective workmanship and materials for a period of one year from the
date of receipt of equipment.
Note: We do not consider the results of ordinary wear and tear,
neglect, misuse, or accident as defects.
The Seller’s liability for defective parts shall in no event exceed the
furnishing of replacement parts “freight on board” the factory where
originally manufactured. Material and equipment covered hereby
which is not manufactured by Seller shall be covered only by the
warranty of its manufacturer. Seller shall not be liable to Buyer for
loss, damage or injuries to persons (including death), or to property
or things of whatsoever kind (including, but not without limitation,
loss of anticipated profits), occasioned by or arising out of the instal-
lation, operation, use, misuse, nonuse, repair, or replacement of said
material and equipment, or out of the use of any method or process
for which the same may be employed. The use of this equipment con-
stitutes Buyer’s acceptance of the terms set forth in this warranty.
There are no understandings, representations, or warranties of any
kind, express, implied, statutory or otherwise (including, but with-
out limitation, the implied warranties of merchantability and fitness
for a particular purpose), not expressly set forth herein.
2
ES-2 2 ABOUT THE ES-2
2 About the ES-2
2.1 Specifications
Temperature
Accuracy: ±1◦C
Resolution: 0.1 ◦C
Range: −40 ◦C to 60 ◦C
Bulk Electrical Conductivity
Accuracy: ±0.01 dS/m or ±10% (whichever is greater)
Resolution: 0.001 dS/m
Range: 0 to 120 dS/m (bulk)
General
Dimensions:
•ES-2: 10.9 x 2.4 cm (4.3 x 0.95 in) with 1/2” NPT
Measurement Time: 300 ms (milliseconds)
Power Requirements: 3.6 to 15 VDC, 0.03 mA quiescent, 0.5 mA
during 300 ms measurement
Output: Serial (TTL), 3.6 voltage levels or SDI-12
Operating Temperature: −40 to 6 0◦C
Note: Sensors can be used at higher temperatures. Please contact
METER for assistance.
Connector types: 3.5 mm (stereo) plug or stripped and tinned lead
wires (Pigtail)
Cable Length: 5 m standard; custom cable length
Data logger Compatibility (not exclusive):
•METER: All METER Loggers cabable of reading digital
sensors
3
2 ABOUT THE ES-2 ES-2
•Campbell Scientific: Loggers with serial I.O includ-
ing CR10X, CR23X, or any CRBasic type logger (CR850,
1000, 3000, etc)
•Other: Any data acquisition system capable of 3.6 to 15
V excitation and serial or SDI-12 communication.
Handheld Reader Compatibility: ProCheck (rev 1.34+)
Software Compatibility: ECH2O Utility (rev 1.64+) and DataTrac
3 (rev 3.4+)
4
ES-2 3 MEASUREMENTS
3 Measurements
3.1 Temperature
A thermistor near the electrical conductivity (EC) sensor senses the
temperature of the water. The sensor uses this temperature to ad-
just the EC measurements to their 25 ◦C value, and provides the
temperature output for the data stream.
3.2 Electrical Conductivity
EC is useful for measuring the concentration of salts in water and
also gives information about dissolved solids. EC is measured by
applying an alternating electrical current to two electrodes, measur-
ing voltage drop with a separate set of electrodes. Then measuring
the current flow through those electrodes and measuring the current
with a separate set of electrodes. The conductance is the ratio of
current to voltage. Conductivity is conductance multiplied by a cell
constant based on common conductivity standards. It is important
to realize that a four electrode sensor gives unpredictable readings in
air because there is no connection between the voltage and current
electrodes.
5
4 CALIBRATION ES-2
4 Calibration
METER calibrates our EC sensors at the factory using KC1 solutions
of known concentration and calibration values are stored internally
in flash memory.
The following table relates EC at 25 ◦C to concentration for vari-
ous concentrations of KC1. Operators can verify ES-2 performance
using these solutions. The ES-2 internally corrects output value to
25 ◦C
Table 1: EC of KC1 solutions for testing ES-2 calibrations.
Electrical Conductivity g KC1 per kg of distilled
(µS/cm) water
100 0.0446
200 0.0930
500 0.2456
1,000 0.5120
2,000 1.0673
5,000 2.8186
10,000 5.8758
20,000 12.2490
6
ES-2 5 CONNECTING SENSORS
5 Connecting Sensors
The ES-2 Sensor was designed to work most efficiently with ME-
TER’s data loggers, or our ProCheck handheld reader. The stan-
dard sensor (with 3.5 mm stereo connector) quickly connects to and
is easily configured within a METER logger or ProCheck.
The ES-2 Sensor incorporates several features that also make it an
excellent sensor for use with third party loggers. The sensor may
be purchased with stripped and tinned wires (pigtail) for terminal
connections. Visit www.metergroup.com and search for the ES-2 In-
tegrator Guide to get extensive directions on integrating the ES-2
sensor into third party loggers.
The ES-2 Sensor comes standard with a five meter cable. Sensors
may be purchased with custom cable lengths for an additional fee
(on a per-meter basis). METER has tested its digital sensors suc-
cessfully with cable lengths up to 1,000 m (3,200 ft). Using a longer
cable eliminates the need for splicing the cable (a possible failure
point).
5.1 Connecting to METER Logger
METER designed the ES-2 to work specifically with METER data
loggers. Simply plug the 3.5 mm “stereo” connector directly into one
of the sensor ports.
Figure 1: 3.5 mm Stereo Plug Wiring
The next step is to configure your logger port for the ES-2 Sen-
sor and set the measurement interval. This may be done using ei-
7
Otros manuales para ES-2
1
Tabla de contenidos
Otros manuales de Controladores de temperatura de METER
