ECD HYDRA Ammonium User Manual
E
LECTRO-CHEMICAL DEVICES
Instruction Manual
Hydra Ammonium Analyzer
Rev: E - 07/11
Page ii HYDRA NH
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PREFACE
Purchasing products from Electro-Chemical Devices, Inc. provides you with the finest liquid analytical
instrumentation available. If this is your first purchase from ECD, please read this manual before
installing and commissioning your new equipment.
If there are any questions concerning this equipment, please contact your local ECD representative, or
the factory directly at:
Electro-Chemical Devices, Inc.
1681 Kettering St.
Irvine, CA 92614 USA
Telephone: +1-949-336-6060
FAX: +1-949-336-6064
Website: www.ecdi.com
Email: sales@ecdi.com
© 2010 Electro-Chemical Devices, Inc. All rights reserved. No part of this manual may be used or reproduced in any form or by any means, or
stored in a database or retrieval system without prior written permission from Electro-Chemical Devices, Inc. Making copies of any part of this
manual for any purpose other than personal use is a violation of United States copyright laws. Document printed in the United States of
America.
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TABLE OF CONTENTS
PREFACE ....................................................................................................................................................... iii
TABLE OF CONTENTS .................................................................................................................................... iv
WARRANTY ................................................................................................................................................. vii
IMPORTANT SERVICE INFORMATION ......................................................................................................... vii
1.0 GENERAL DESCRIPTION ........................................................................................................................... 1
1.0.0 Description ................................................................................................................................... 1
1.0.1 Potassium Ion Compensation ...................................................................................................... 1
1.0.2 pH Compensation......................................................................................................................... 1
1.0.3 Temperature Compensation ........................................................................................................ 1
1.0.4 Cleaning and Maintenance .......................................................................................................... 1
1.1 FEATURES ............................................................................................................................................ 2
1.1.1 Features and Benefits .................................................................................................................. 2
1.2 Specifications ...................................................................................................................................... 2
1.2.1 Hydra Sensor ................................................................................................................................ 2
1.2.2 C22 Analyzer ................................................................................................................................ 3
1.3 Hydra Dimensional Drawing ............................................................................................................... 4
1.3.1 Parts List: ...................................................................................................................................... 4
2.0 INSTALLATION ......................................................................................................................................... 5
2.1 UNPACKING ......................................................................................................................................... 5
2.2 ASSEMBLY ........................................................................................................................................... 5
2.2.1 Spray Cleaner ............................................................................................................................... 5
2.2.2 Immersion /Support Tube ............................................................................................................ 5
2.3 MOUNTING ......................................................................................................................................... 6
2.3.1 C-22 Analyzer ............................................................................................................................... 6
2.3.2 Hydra Sensor ................................................................................................................................ 6
2.4 WIRING ................................................................................................................................................ 6
2.4.1 Wiring, power .............................................................................................................................. 6
2.4.2 Wiring, Sensor .............................................................................................................................. 6
2.4.3 Wiring, 4-20 mA Outputs ............................................................................................................. 6
2.4.4 Wiring, Contact Relay Outputs ..................................................................................................... 7
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3.0 OPERATION ............................................................................................................................................. 9
3.1 KEYS ..................................................................................................................................................... 9
3.2 MENUS .............................................................................................................................................. 10
3.2.1 Ammonium Ion Channel 1 Menu Structure ............................................................................... 10
3.2.2 Potassium Ion Channel 2 Menu Structure ................................................................................. 10
3.2.3 pH Channel 3 Menu Structure ................................................................................................... 10
3.2.4 Graphical Display Screen ............................................................................................................ 10
3.2.5 Buffer Menu ............................................................................................................................... 11
3.2.6 Set-Up Menu .............................................................................................................................. 11
3.2.7 Status Menu ............................................................................................................................... 14
3.2.8 Configuration and Trim Menu.................................................................................................... 14
3.3 OUTPUTS ........................................................................................................................................... 14
3.3.1 Manual Mode (4-20 mA Hold Function) .................................................................................... 15
3.4 CONTACTS-ALARM RELAYS ............................................................................................................... 15
3.4.1 Standard Configuration .............................................................................................................. 15
3.4.2 One AC10 with Two HYDRAs ...................................................................................................... 16
3.5 ION SELECTIVE FEATURES ................................................................................................................. 17
3.5.1 The Isopotential point ................................................................................................................ 17
3.5.2 Potassium Ion Interference Correction ...................................................................................... 17
3.5.3 pH Correction ............................................................................................................................. 17
4.0 START UP ............................................................................................................................................... 18
4.1 SET-UP AND CONFIGURATION .......................................................................................................... 18
4.1.1 Set Up Menus, Standard ............................................................................................................ 18
4.1.2 Set Up Menu, MASTER/SLAVE ................................................................................................... 19
4.1.3 Configure and Trim Menu, Standard ......................................................................................... 20
4.1.4 Configure and Trim Menu, MASTER/SLAVE ............................................................................... 21
4.2 CALIBRATION ..................................................................................................................................... 23
4.2.1 Recommended Materials ........................................................................................................... 23
4.2.2 Temperature Calibration ............................................................................................................ 24
4.2.3 Single point Calibration .............................................................................................................. 24
4.2.4 Two point Calibration ................................................................................................................. 25
4.2.5 Potassium Ion Compensation .................................................................................................... 25
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5.0 MAINTENANCE ...................................................................................................................................... 26
5.1 MAINTENANCE SCHEDULE ................................................................................................................ 26
5.2 CLEANING THE SENSOR ..................................................................................................................... 26
5.3 REPLACING THE ELECTRODES ........................................................................................................... 26
6.0 TROUBLESHOOTING .............................................................................................................................. 27
7.0 ENGINEERING DOCUMENTATION ......................................................................................................... 28
7.1 SPECIFICATIONS ................................................................................................................................ 28
7.2 OUTLINE & DIMENSIONAL DRAWING ............................................................................................... 29
7.2.1 Hydra Sensor Dimensions .......................................................................................................... 29
7.2.2 C-22 Dimensions ........................................................................................................................ 29
7.2.3 Sun Shield Mounting .................................................................................................................. 30
7.3 WIRING DIAGRAM ............................................................................................................................. 31
7.3.1 Sensor Color Coded Diagram ..................................................................................................... 31
7.3.2 Instrument – Terminal Layout/Connections .............................................................................. 31
8.0 ORDERING INFORMATION .................................................................................................................... 33
8.1 PART NUMBERS/MODEL NUMBERS ................................................................................................. 33
8.2 ACCESSORIES ..................................................................................................................................... 33
8.3 SPARE PARTS ..................................................................................................................................... 33
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WARRANTY
Electro-Chemical Devices, Inc. (ECD) warrants all products it manufactures to be free from defect in materials and factory
workmanship, and agrees to repair or replace any product that fails to perform, as specified, within one (1) year after date of
shipment. This warranty shall not apply to any product that has been:
1. Subjected to misuse, negligence or accident;
2. Connected, installed, adjusted or otherwise used not in accordance with the instructions furnished by ECD;
3. Repaired, modified or altered by persons not authorized by ECD, resulting in injury to the performance, stability or
reliability of the product.
This warranty is in lieu of any other warranty, expressed or implied. ECD reserves the right to make changes in the design or
construction of its products at any time, without prior notification, and without incurring any obligation to make any changes in
previously delivered products.
Seller’s sole liabilities and the buyer’s sole remedies under this agreement shall be limited to a refund in the purchase price, or
at ECD’s discretion, to the repair or replacement of any product that proves, upon ECD’s examination, to be defective, when
returned to the factory, transportation prepaid by the buyer, within one (1) year of the product’s original shipment date. Seller
shall not be liable for damages consequential or incidental to defects in any product, for failure of delivery in whole or in part,
for injuries resulting from its use, or for any other cause.
This warranty and the writing attached constitute the full understanding of seller and the buyer, and no terms, conditions,
understanding, or agreement purporting to modify or vary the terms hereof shall be binding unless hereafter made in writing
and signed by an authorized official of Electro-Chemical Devices, Inc.
This warranty does not cover pH, ORP or Specific Ion measurement, reference or combination electrodes or electrode
cartridges that have been commissioned in service.
IMPORTANT SERVICE INFORMATION
Use only factory authorized components for repair. Tampering or unauthorized substitution of components may
adversely affect the operation of this product and may void the warranty.
If service or repair is required, please obtain the serial number(s) or sales order number of the product(s) in
question and contact ECD’s Service Department at:
+1-800-729-1333 (USA/Canada) or +1-949-336-6060
or email Service@ecdi.com
A Return Material Authorization (RMA) number must be obtained from the service department before returning
any material to ECD. All material returned to ECD shall be shipped prepaid to the factory.
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UNPACKING THE INSTRUMENT
Your Electro-Chemical Devices instrument has been carefully packaged to protect it from damage during
shipment and dry storage. Upon receipt please follow the procedure outlined below.
1. Before unpacking, inspect the condition of the shipping container to verify proper handling by
the carrier. If damage is noted, save the shipping container as proof of mishandling for the
carrier.
2. Check the contents of the shipping container with the items and quantities shown on the
packing list. Immediately report any discrepancies to ECD.
3. Save the original packing material until you are satisfied with the contents. In the event the
product(s) must be returned to ECD, the packing material will allow you to properly ship it to
ECD.
4. Familiarize yourself with the instrument before installation, and follow proper installation and
wiring procedures.
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1.0 GENERAL DESCRIPTION
1.0.0 Description
The HYDRA Ammonium Analyzer measures the concentration of dissolved
ammonium as nitrogen (NH
determine the NH
+
-N concentration, an Ammonium Ion Electrode, a Potassium Ion
4
Electrode and a pH electrode. It is designed for use in all kinds of water. Typical
applications include monitoring environmental waters, lakes, streams and wells as
well as wastewater treatment in aeration basins and effluent.
1.0.1 Potassium Ion Compensation
The Ammonium Ion Electrode provides the primary measurement. Any potassium
ion in the sample, due to its similar size and charge to the ammonium ion, causes a
positive interference in the measurement. A Potassium Ion Electrode measures the
amount of potassium ion present in the sample and HYDRA C22 Analyzer subtracts
the appropriate amount of signal from the Ammonium Measurement.
+
-N) in water. The sensor uses three electrodes to
4
1.0.2 pH Compensation
The Ammonium Ion Electrode only measures the ammonium ion (NH
+
) not
4
ammonia (NH3). Ammonium ion and ammonia coexist in a pH dependent ratio in
solution. At pH 9.2 the ratio is 1:1, at pH 7 nearly all of the ammonia is in the
ammonium state and at pH 11 it is nearly all ammonia which is invisible to the
sensor. The more acidic values favor the NH
+
and the more basic values favor
4
ammonia gas, NH3. The pH Electrode measures the pH and the HYDRA C22 Analyzer
calculates the total NH
+
-N concentration based on the pH vs. concentration profile.
4
1.0.3 Temperature Compensation
Temperature is also measured and used to compensate each of the three electrode measurements.
While the pH electrode response is well defined with respect to temperature the ion electrodes tend to
be less well behaved. For the best results
calibrate the sensors near the process
temperature.
1.0.4 Cleaning and Maintenance
The HYDRA Ammonium Analyzer is configured to
NH3/NH
% concentration vs pH
100
80
+
4
periodically actuate a cleaning cycle using the
integral spray cleaner in the sensor. The period
and duration of the cleaning cycle is user
configurable. The 4-20 mA output is held at
either the last value or a preset value during the
cleaning. This minimizes the formation biofilms
60
%
40
20
0
6 8 10 12
pH
% NH4+
% NH3
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or other coatings on the electrodes keeping maintenance to a minimum.
The rugged HYDRA sensor has a 1 ¼” NPT rear facing thread for attaching an extension/immersion tube
for easy installation from catwalks or handrails. The HYDRA sensor is submersible with an IP68 degree of
ingress protection. A removable electrode guard facilitates easy electrode replacement when necessary.
The HYDRA sensor features internal signal conditioning that allows the sensor to be mounted up to 200
meters from the analyzer.
1.1 FEATURES
1.1.1 Features and Benefits
• Separate, economical, easily replaceable Ammonium, Potassium and pH electrodes
• Fast and Accurate Ammonium Measurement NH4+ or NH4+-N
• pH and temperature compensated NH4+-N measurement
• Automatic compensation for K+ interference
• Rugged PVC design with removable electrode guard for easy maintenance
• Integral Spray Head Cleaner
Cleans sensor in situ with pressurized air
• Internal Signal Conditioning allows up to 200 meters between Sensor and Analyzer
1.2 Specifications
1.2.1 Hydra Sensor
• Three Electrode System with spray cleaner
• Ammonium ISE (NH4+- N) is the primary measurement
• Potassium ISE and pH glass electrodes are used for compensation of the NH4+ signal.
• The Sensor is waterproof with an ingress rating of IP 68.
Measurement Range
• NH4+- N: 0.1 to 1000 ppm
• K+: 0.1 to 10,000 ppm
• pH: 4-12 pH
Operating Temperature
• 0° C to 40° C (32° F to 104° F)
Min/Max Flow Rate by the sensor
• Minimum 0.1 m/s
• Maximum 3.0 m/s
Wetted Materials
• PVC, PES, PVDF, PTFE, Viton, Glass, 316 SS
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Accuracy
• ± 3% of reading, dependent on Calibra0on
Response Time
• T90 approximately 1 minute
Electrode Life
• ISEs: 4- 6 months, typical
• pH electrode: 6-12 months, typical
1.2.2 C22 Analyzer
Measurements
• Ammonium: 0.1 ppb to 1000 ppm as NH4+- N
• Potassium: 0.1 ppb to 1000 ppm
• pH: 0 to 14 pH
• Temperature: 0° C to 100° C (32° F to 212° F)
Compensation
• pH 4 - 12 pH
• Potassium: 0.1 to 1000 ppm
• 0° - 50°C
Display
• 2.5” X 1.75” backlit LCD
• 4 lines of Text
• Graphical display, NH4+-N vs. Time
Enclosure
• NEMA 4X, LxWxD: 5.7” x 5.7” x 7”
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Relay
Standard Configuration
Master
Configuration
Slave Configuration
1 Spray Cleaner
(NO)
PV 1 Alarm
(NO)
NH4-N Alarm
(NO)
2 NH4-N Alarm
(NO)
Digital Input to Slave
(NO)
pH Alarm
(NO)
3
Spray Cleaner
(NO)
4
Diverter Valve
(NO)
Outputs
• (2) 4-20 mA maximum load 800 ohms @ 24 VDC
• mA #1: 0.1 to 50 mg/l NH4+- N (User Configurable)
• mA #2: 2 - 12 pH (User Configurable)
• Optionally up to (4) 4-20 mA outputs*
Input Power
• 110/220 VAC @ 50/60 Hz
Alarm Relay Ratings
• SPDT 230 VAC/5A or 30 VDC/5A resistive max. (NO) Normally Open
1.3 Hydra Dimensional Drawing
Figure 1.3
1.3.1 Parts List:
Page 4 HYDRA NH
o HYDRA Sensor with Electrodes, Calibration Cap,
o 30’ of ¼” air tubing, Electrode Removal Tool
+
-N
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2.0 INSTALLATION
2.1 UNPACKING
Carefully remove the HYDRA sensor from its shipping container. Inspect the sensor for damage. Verify
the electrodes, Ammonium, Potassium and pH and the Spray Cleaner Nozzle are installed in the sensor
housing. The electrodes should be hand tightened into place so that the sealing o-rings are not visible.
The electrodes are supplied with protective caps that must be removed before start up. Do not remove
the caps until ready to use.
### NEVER SUPPORT THE HYDRA SENSOR BY THE CABLE, IRREPAIRABLE DAMAGE WILL OCCUR ###
2.2 ASSEMBLY
The HYDRA Sensor is shipped completely assembled, before use it must be connected to the analyzer
and an air supply. Connect the spray cleaner feed tube to a compressed air supply controlled by a
solenoid valve (not supplied). Attach an immersion/support tube (not supplied). Finally connect the
sensor wires and 110 VAC power to the analyzer as shown on the wiring diagram. Connect the Cleaner
Relay to the solenoid and connect the 4-20 mA Output(s) and Alarm Relay to the Control System, (PLC or
DCS). The HYDRA is then ready to use.
2.2.1 Spray Cleaner
The Spray Cleaner uses compressed air to create turbulence around the electrodes which removes dirt
and films from the measurement surfaces. Depending on the process being measured the cleaner
should be actuated for 15-30 seconds every 0.25 -2 hour period. The spray cleaner connection is a ¼”
compression fitting and requires between 25-75 psi air pressure. The air supply is controlled with a user
supplied solenoid valve through Relay 1 in the C-22 analyzer. The solenoid valve should be a 110 AC
powered, <10 watt device. Wire the solenoid to Relay 1 as described in Section 2.4.4 below.
If no air supply is available use the ECD Model AC10 Air Blast Spray Cleaner compressor. The AC10 uses
redundant intake air filters and redundant fuses on both the relays and the compressor. A highly reliable
high current contactor assures years of trouble free service. The 115 VAC 3.0 Amp or 220 VAC 1.3 Amp
Air Compressor is housed in a rugged, corrosion resistant, hot compression molded, fiberglass
reinforced, polyester enclosure with a stainless steel piano hinge to secure the cover to the base. The
AC10 can be wall mounted or use the optional 2” handrail mounting system that uses stainless steel
support rails with two 2” galvanized pipe clamps.
### NEVER SUPPORT THE HYDRA SENSOR BY THE CABLE, IRREPAIRABLE DAMAGE WILL OCCUR ###
2.2.2 Immersion /Support Tube
Feed the cable and compressed air line through the immersion/support tube (not supplied). Connect a
support tube to the 1 ¼” MNPT thread at the rear of the sensor. The Hydra sensor weighs approximately
5.3 lbs. The support tube must be able to support the weight of the HYDRA sensor in the user’s
installation, whether vertical or angled. The recommended material for the immersion tube is 1.5”
Schedule 80 PVC pipe with a reducer fitting to 1 ¼” FNPT.
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