Omega SONAR PHE ORE Series User Manual

Users Guide  
Shop online at  
PHE/ORE Series  
pH/ORP Electrodes  
 
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
SAFETY INSTRUCTIONS  
1. Depressurize and vent system prior to installation or removal.  
2. Confirm chemical compatibility before use.  
3. Do not exceed maximum temperature/pressure specifications.  
4. Wear safety goggles or faceshield during installation/service.  
5. Do not alter product construction.  
6. When using chemicals or solvents care should be taken and appropriate eye, face, hand, body,  
and/or respiratory protection should be used.  
1. Technical Data  
1.1 General  
Compatibility:  
OMEGA PH-2720-PA Twist-Lock Preamplifier  
75  
50  
25  
5
Pipe Size Range:  
1
/
2
in. and up.  
Use OMEGA installation fittings to 4 in.  
Use pipe adapter in pipes over 4 in.  
3
2
3
Submersion with PH-2720-PA pre-amplifier requires /4 in.  
3
NPT or ISO 7-R /4 in. male threaded extensions  
Efficiency:  
>97% @ 25°C (77° F)  
0 10 25  
50  
75  
°C  
°F  
Wetted Materials:  
CPVC Body  
50  
32  
77  
122  
167  
Glass  
FPM O-rings  
1.4 Temperature and pressure specifications  
Porous UHMW Polyethylene reference  
junctions  
ORP electrode operating Temperature/Pressure  
6.89 bar @ 0°C to 65ºC (100 psi @ 32° to 149° F)  
ORP: Platinum sensing surface  
4.00 bar @ 66ºC to 85°C (58 psi @150° to 185°F)  
Primary Functions:  
PHE-3271, ORE-2715: Flat surface  
PHE-2716 and PHE-2716-DI pH electrode operating Temperature/  
resists fouling  
Pressure  
PHE-2716, ORE-2717: Bulb surface for  
general use  
6.89 bar @ 0°C to 65ºC (100 psi @ 32° to 149° F)  
4.00 bar @ 66ºC to 85°C (58 psi @150° to 185°F)  
PHE-3271-HF: Extended use in  
applications with trace hydrofluoric acid  
(<2%)  
PHE-3271 pH electrode operating Temperature/Pressure  
6.89 bar @ 10°C to 65ºC (100 psi @ 50° to 149° F)  
PHE-2716-DI: Extended use in pure  
waters (<100 µS)  
4.00 bar @ 66ºC to 85°C (58 psi @150° to 185°F)  
PHE-3271-HF pH electrode operating Temperature/Pressure  
Secondary Junction:  
Nylon Filament  
6.89 bar @ 0°C to 50ºC (100 psi @ 32° to 122° F)  
Element:  
Ag/AgCl  
Shipping Weight:  
0.2 kg (0.4 lb)  
Storage Temperature: > -12° C (11° F)  
1.2 PHE-3271 and PHE-2716 pH Electrodes  
1.5 Dimensions  
Operating Range:  
Reference:  
0 to 14 pH (PHE-3271-HF: 0 to 12 pH)  
Electrolyte: Solidified Acrylamide Gel  
3.5M KCI (PHE-3271, PHE-3271-HF,  
PHE-2716)  
0.1 M KCl (PHE-2716-DI)  
Temperature Sensor:  
3KBalco (3000= 25°C)  
<5 s for 95% of signal change  
140 s (PHE-3271), 196 s (PHE-2716)  
1.2 in.  
1.2 in.  
2.6 in.  
ResponseTime:  
(30.5 mm)  
(30.5 mm)  
(65 mm)  
Response Time, τ:  
4.1 in.  
3.8 in.  
(104 mm)  
(97 mm)  
1.3 ORE-2715/ORE-2717 ORP Electrodes  
Operating Range:  
Reference:  
-999 to +999 mV  
2.6 in.  
Electrolyte: Solidified Acrlyamide Gel  
3.5M KCL  
(65 mm)  
3.4 in.  
3.4 in.  
(86 mm)  
(86 mm)  
Response Time:  
Application dependent  
0.9 in.  
(23 mm)  
0.9 in.  
(23 mm)  
Flat electrode  
Bulb electrode  
page 3  
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
 
pH/ORP electrodes are similar to batteries; they age with time and usage. The following information will help maximize electrode life.  
2.1 Conditions to Avoid:  
High temperatures, strong acids or caustics will elevate electrochemical reactions and speed electrode aging.  
Coatings on the glass or junction surfaces (i.e. proteins) cause extended response time and inaccurate measurement.  
Never store the electrode tip in deionized (DI) water.  
Never expose electrode to temperatures below -12 °C (10 °F) or allow it to dehydrate. These conditions will damage the electrode.  
Never scrape or sand the glass electrode surface.  
Treat glass electrode surfaces with care. The glass is very thin and requires care to prevent accidental breakage.  
2.2 Submersible Installation Tips:  
Mount electrodes in a location with ample clearance for removal for  
YES  
YES  
periodic cleaning and recalibration. Choose a location that keeps the  
electrode glass completely submerged at all times.  
Place the electrode tip in pH 4 buffer during system maintenance or  
storage to avoid dehydration.  
Mount the electrode near tank outlet away from reagent addition areas.  
30°  
30°  
2.3 In-Line Installation Tips:  
NO  
NO  
pH and ORP electrodes respond best in moving fluids.  
The internal measuring electrode chamber contains a wire within a liquid  
and a slight amount of air. The electrode must be mounted at least 30°  
from horizontal to ensure proper sensing. Mounting angles less than 30°  
will impede performance.  
NO  
3. pH Electrode Calibration  
All pH electrodes are designed to ensure linearity during their lifespan. The following  
sections define proper electrode operation.  
Theoretical mV Values @ 25°C  
pH  
2
3
4
mV  
+ 295 mV  
+ 236 mV  
+177 mV  
+118 mV  
+ 59 mV  
0 mV  
3.1 Offset (STD)  
Electrode offsets occur due to:  
5
6
7
8
Clogged reference junction  
Aged or contaminated reference solution/wire  
- 59 mV  
Check offsets in a pH 7 buffer @ 25 °C. The theoretical output is 0 mV. Any deviation from  
9
- 118 mV  
- 177 mV  
- 236 mV  
- 295 mV  
0 mV is the pH electrode offset.  
10  
11  
12  
pH Electrode Offset pH 7 buffer @ 25°C  
Theoretical:  
7.0 pH (0.0 mV)  
New:  
pH 7 ± 0.25 pH (±15 mV)  
Reliable:  
pH 7 ± 0.85 pH (± 50 mV)  
Electrode offsets greater than 0.85 pH (50 mV) indicate the electrode requires cleaning or replacement. See section 5: Maintenance and  
cleaning.  
°C  
pH Error  
7
3.2 Slope (SLP)  
2
3
4
5
6
8
9
10  
11  
12  
Electrode slope is the number of mV per pH unit. At 25°C the  
theoretical slope is 59.16 mV per pH. Temperature has an  
appreciable affect on electrode slope. Reliable instrumentation  
15 0.15 0.12 0.09 0.06 0.03  
0
0
0
0
0
0.03 0.06 0.09 0.12 0.15  
25  
0
0
0
0
0
0
0
0
0
0
35 0.15 0.12 0.09 0.06 0.03  
0.03 0.06 0.09 0.12 0.15  
includes temperature compensation. The graph below illustrates  
potential pH error when a temperature compensated instrument  
is not used.  
45 0.3  
0.24 0.18 0.12 0.06  
0.06 0.12 0.18 0.24  
0.3  
55 0.45 0.36 0.27 0.18 0.09  
0.09 0.18 0.27 0.36 0.45  
Recommendations:  
Calibrate temperature before calibrating the standard and slope.  
The mV offset will track across the entire pH range. The slope is usually not affected by offset changes.  
(i.e. pH 7= +10 mV, pH 4= +187 mV); slope = 59 mV  
Coatings on the glass may affect sensor slopes. See section 5 maintenance and cleaning.  
A constant output near 0 mV in all buffer solutions indicates a shorted electrode that must be replaced.  
3.3 Response Time/Stability  
Response time and stability are affected by the condition of the pH electrode's glass surface (ORP electrode - Platinum surface),  
reference junction, and reference solution. Restoration to acceptable levels can often be accomplished by cleaning the electrode's glass  
surface (ORP electrode - Platinum surface) and reference junction.  
Electrode mV values should remain stable ±3 mV. Conditions that may cause fluctuations are:  
1. Electrode coating  
2. Ground fault: If proper operation is observed in the beaker, but is unstable in the application, a ground fault probably exists.  
Using instrumentation with isolated inputs and outputs may restore stable operation.  
Solution grounding may also restore stable operation.  
page 4  
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
 
All ORP electrodes are designed to ensure linearity during their lifespan. The following sections define proper electrode operation.  
4.1 Offset (STD)  
Electrode offsets occur due to:  
Clogged reference junction  
Aged or contaminated reference solution/wire  
Offsets are easily checked in pH 7 buffer saturated with quinhydrone @ 25 °C; since the theoretical output is +87 mV. Any deviation  
from +87 mV is the ORP electrode offset (i.e. +90 mV). Quinhydrone is the oxidizer measured by the ORP electrode and is required for  
calibration. To guarantee buffer saturation, mix 1/8g quinhydrone per 50 mL of pH buffer.  
ORP Electrode Offset:  
Solution: pH 7 or pH 4 buffer saturated with Quinhydrone @ 25 °C  
pH 7 + Quinhydrone  
pH 4 + Quinhydrone  
Theoretical mV:  
+ 87 mV  
+ 264 mV  
New:  
87 ± 15 mV  
+264 ± 15 mV  
Reliable:  
87 ± 50 mV  
+264 ± 50 mV  
Electrode offsets greater than ±50 mV indicate the electrode requires cleaning or replacement, see section 5.2.  
4.2 Slope (SLP)  
ORP slope errors are generally caused by contamination of the platinum electrode surface. Cleaning the electrode surface will usually  
restore proper values, response time, and stability.  
Common ORP Values  
Reaction  
mV  
2+  
-
Cr Cr + 2e  
- 913  
- 440  
- 407  
- 401  
- 400  
- 370  
- 250  
- 126  
- 37  
2+  
-
FeFe + 2e  
2+  
3+  
-
Cr Cr + e  
-
4OH O2 + 2H2O + 4e  
-
-
2I I2 + 2e  
2+  
3+  
-
Ti Ti + e  
2+  
-
Ni Ni + 2e  
2+  
-
Pb Pb + 2e  
3+  
-
Fe Fe + 3e  
+
-
H2 2H + 2e  
0
2+  
3+  
-
-
Fe Fe + e  
+ 771  
+ 799  
+ 800  
+ 1060  
+ 1066  
+ 1160  
+ 1188  
+ 1369  
+
-
Ag Ag + e  
4+  
Pb Pb + 4e  
-
-
-
3Br Br3 + e  
-
-
2Br Br2 + 2e  
-
-
ClO2 ClO2 + e  
2+  
-
Pt Pt + 2e  
2+  
-
Ag Ag + 2e  
Many systems require both pH and ORP calibration. To conserve calibration reference solutions, use pH 7 and 4 buffers for pH  
calibration first. ORP calibration can be performed with the same buffers by adding quinhydrone.  
5. Maintenance and Cleaning  
5.1 Maintenance  
Variables can affect long term pH or ORP electrode life. For this reason, a maintenance log is recommended for trend analysis. When  
storing boxed sensors, lay the sensor flat to maximize hydration of the glass surface. Keep the glass surface wet at all times. Soak the  
sensor tip in pH 4.0 buffer during system maintenance intervals. In-line applications should be plumbed with a depression (trap) so liquid  
is maintained around the sensor tip. If the sensor dehydrates, soak the sensor tip in pH 4 buffer for 24 to 48 hours, then visually inspect  
the electrode for surface cracks, swelling, or discoloration. Severely dehydrated electrodes cannot be restored to normal operation.  
page 5  
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
 
Cleaning techniques vary depending on the type of coating present on the glass electrode surface or reference junction.  
Soft coatings can be removed by vigorous stirring, or with directed spray of an applicable detergent or solvent onto the glass  
electrode surface. Chlorine bleach or mild detergent may be used to remove soft coatings. Always rinse electrode tip in clean water  
after cleaning.  
Hard coatings can be chemically removed. Use the least harsh chemical which will remove the contaminant within two (2) minutes  
without attacking the materials of construction. e.g. calcium carbonate may be removed with a 5% HCL (muriatic acid) solution.  
Oily or organic coatings can be removed with detergents or an appropriate solvent that does not attack the materials of  
construction e.g. isopropyl alcohol may be used but acetone must be avoided to prevent damage to the CPVC sensor body.  
ORP electrode surface (platinum rod) can be gently sanded with 600 grit wet and dry silicone or carbide sandpaper, jewelers rouge,  
crocus cloth, or very fine steel wool.  
WARNING!  
Wear appropriate eye, face, hand, body, and respiratory protection when using chemicals or solvents.  
6. Replacement parts and accessories  
Mfr. Part No.  
Description  
PHE-3271  
Flat pH Electrode  
PHE-3271-HF  
Flat pH Electrode, HF Resistsant  
ORE-2715  
Flat ORP Electrode  
PHE-2716  
Bulb pH Electrode  
PHE-2716-DI  
ORE-2717  
Bulb pH Electrode, DI Resistant  
Bulb ORP Electrode  
3
PH-270-PA  
Preamplifier, /4 in. NPT  
P31515-0V200  
PVDF Pipe Adapter  
FPP-1220-0021  
O-ring, FPM (standard)  
FPP-1224-0021  
FPP-1228-0021  
O-ring, EPR  
O-ring, Kalrez  
a
b
c
o
n
m
CAUTION!  
d
Apply O-ring lubricant to sensor O-rings prior to assembly.  
Unlubricated O-rings may score the sealing surface in the 2720.  
c
Technical Features  
l
a)  
b)  
Male BNC connector  
i)  
j)  
3K Balco thermistor  
k
Keyed for a simple sure fit  
Solidified acrylamide reference  
j
i
c)  
d)  
e)  
Viton® O-rings  
electrolyte  
Silicone-bushing seal  
k)  
Ag/AgCl measuring element  
e
f
Double junction  
l)  
Large reference volume  
f)  
Ag/AgCl reference element  
m) Epoxy seal  
g)  
h)  
Platinum sensing surface (ORP) or flat pH glass  
Porous UHMW polyethylene reference junction  
n)  
o)  
Shielding  
h
g
10KI.D. resistor for ORP sensor  
page 6  
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
 
WARRANTY/DISCLAIMER  
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a  
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month  
grace period to the normal one (1) year product warranty to cover handling and shipping time. This  
ensures that OMEGA’s customers receive maximum coverage on each product.  
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service  
Department will issue an Authorized Return (AR) number immediately upon phone or written request.  
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no  
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,  
including but not limited to mishandling, improper interfacing, operation outside of design limits,  
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of  
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;  
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating  
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not  
limited to contact points, fuses, and triacs.  
OMEGA is pleased to offer suggestions on the use of its various products. However,  
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any  
damages that result from the use of its products in accordance with information provided  
by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it  
will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF  
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY  
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF  
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of  
OMEGA with respect to this order, whether based on contract, warranty, negligence,  
indemnification, strict liability or otherwise, shall not exceed the purchase price of the  
component upon which liability is based. In no event shall OMEGA be liable for  
consequential, incidental or special damages.  
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic  
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical  
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or  
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility  
as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify  
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the  
Product(s) in such a manner.  
RETURN REQUESTS/INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE  
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN  
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID  
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return  
package and on any correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent  
breakage in transit.  
FOR WARRANTY RETURNS, please have the  
following information available BEFORE  
contacting OMEGA:  
FOR NON-WARRANTY REPAIRS, consult OMEGA  
for current repair charges. Have the following  
information available BEFORE contacting OMEGA:  
1. Purchase Order number to cover the COST of  
the repair,  
2. Model and serial number of the product, and  
3. Repair instructions and/or specific problems  
relative to the product.  
1. Purchase Order number under which the  
product was PURCHASED,  
2. Model and serial number of the product under  
warranty, and  
3. Repair instructions and/or specific problems  
relative to the product.  
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords  
our customers the latest in technology and engineering.  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2000 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the  
prior written consent of OMEGA ENGINEERING, INC.  
page 7  
OMEGA PHE/ORE Series pH/ORP Electrode Instructions  
 
Where Do I Find Everything I Need for  
Process Measurement and Control?  
OMEGA…Of Course!  
TEMPERATURE  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies  
Wire: Thermocouple, RTD & Thermistor  
Calibrators & Ice Point References  
Recorders, Controllers & Process Monitors  
Infrared Pyrometers  
PRESSURE, STRAIN AND FORCE  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Transducers & Strain Gages  
Load Cells & Pressure Gages  
Displacement Transducers  
Instrumentation & Accessories  
FLOW/LEVEL  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Rotameters, Gas Mass Flowmeters & Flow Computers  
Air Velocity Indicators  
Turbine/Paddlewheel Systems  
Totalizers & Batch Controllers  
pH/CONDUCTIVITY  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
pH Electrodes, Testers & Accessories  
Benchtop/Laboratory Meters  
Controllers, Calibrators, Simulators & Pumps  
Industrial pH & Conductivity Equipment  
DATA ACQUISITION  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Data Acquisition & Engineering Software  
Communications-Based Acquisition Systems  
Plug-in Cards for Apple, IBM & Compatibles  
Datalogging Systems  
Recorders, Printers & Plotters  
HEATERS  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Heating Cable  
Cartridge & Strip Heaters  
Immersion & Band Heaters  
Flexible Heaters  
Laboratory Heaters  
ENVIRONMENTAL  
MONITORING AND CONTROL  
ߜ
 
ߜ
 
ߜ
 
ߜ
 
ߜ
 
ߜ
 
Metering & Control Instrumentation  
Refractometers  
Pumps & Tubing  
Air, Soil & Water Monitors  
Industrial Water & Wastewater Treatment  
pH, Conductivity & Dissolved Oxygen Instruments  
6-2714.090-OM/(H-4/03)  
M-2922/0403  
 

Miele Ventilation Hood DA217 3 User Manual
Minicom Advanced Systems Switch 5 User Manual
Musica Portable Speaker 6C User Manual
Nady Systems Musical Instrument CMX 16A User Manual
NEC Drill 2601 20 User Manual
Newcon Optik Binoculars NVS 15 User Manual
Nintendo Video Games 45496903008 User Manual
Omega Water Dispenser OSD10 User Manual
OPTI UPS Power Supply CS385B User Manual
Parker Hannifin Home Security System 88 021610 01G User Manual