Hach 8350.3 User manual
DOC023.98.93064
Polymetron pH/ORP Sensors
03/2017, Edition 5
User Manual
Benutzerhandbuch
Manuale d'uso
Manuel d'utilisation
Manual de usuario
Gebruikershandleiding
Manual do utilizador
Instrukcja obsługi
Használati útmutató
Bruksanvisning
Käyttäjän käsikirja
Руководство пользователя
用户手册
English..............................................................................................................................3
Deutsch.......................................................................................................................... 11
Italiano............................................................................................................................ 19
Français......................................................................................................................... 27
Español.......................................................................................................................... 35
Nederlands....................................................................................................................43
Português...................................................................................................................... 51
Polski.............................................................................................................................. 59
Magyar........................................................................................................................... 67
Svenska......................................................................................................................... 74
Suomi..............................................................................................................................81
Русский..........................................................................................................................88
中文................................................................................................................................. 96
2
Specifications
Specifications are subject to change without notice.
pH/ORP sensors
8350.3 8350.4 8350.5 8351
Application
Measuring pH in
samples containing
hydrofluoric acid
Measuring pH at
high temperatures
Measuring pH in a
waste water
environment
Measuring ORP
Material PPS PPS CPVC PPS
Measurement range 0—12 pH 0—14 pH 0—12 pH ± 1500 mV
Maximum
temperature 110 °C 110 °C 80 °C 110 °C
Maximum pressure 10 bar 10 bar 10 bar 10 bar
Repeatability (week) < 0.05 pH < 0.05 pH < 0.05 pH < 0.05 pH
Offset @ pH7 ± 0.34 pH ± 0.34 pH ± 0.34 pH N/A
Slope 56—61 mV/pH 56—61 mV/pH 56—61 mV/pH N/A
Reference
impedance @ 25 °C < 50 Kohm < 50 Kohm < 50 Kohm < 50 Kohm
Glass impedance @
25 °C 100—150 Mohm 150—500 Mohm 50—250 Mohm N/A
8362 8417
Application Measuring pH in pure or ultra pure
water
Measuring pH in industrial and
waste water treatment plants
Material 316L stainless steel Glass membrane, ceramic junction
Measurement range 2—12 pH 0—14 pH
Maximum temperature 80 °C 110 °C
Maximum pressure 6 bar @ 25 °C 10 bar @ 25 °C
Repeatability (24 hours) < 0.01 pH 0.02 pH
Input impedance > 106 Mohm 100 Mohm
General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
Safety information
N O T I C E
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,
without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent
permitted under applicable law. The user is solely responsible to identify critical application risks and install
appropriate mechanisms to protect processes during a possible equipment malfunction.
English 3
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this
equipment in any manner other than that specified in this manual.
Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING
Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or moderate injury.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special
emphasis.
Precautionary labels
Read all labels and tags attached to the product. Personal injury or damage to the product could
occur if not observed. A symbol on the instrument is referenced in the manual with a precautionary
statement.
This symbol, when noted on a product, indicates a potential hazard which could cause serious
personal injury and/or death. The user should reference this instruction manual for operation and/or
safety information.
This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock
and/or electrocution exists and indicates that only individuals qualified to work with hazardous
voltages should open the enclosure or remove the barrier.
This symbol, when noted on the product, indicates the presence of devices sensitive to electrostatic
discharge and indicates that care must be taken to prevent damage to them.
This symbol, when noted on a product, indicates the instrument is connected to alternate current.
Electrical equipment marked with this symbol may not be disposed of in European domestic or
public disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no
charge to the user.
Products marked with this symbol indicates that the product contains toxic or hazardous substances
or elements. The number inside the symbol indicates the environmental protection use period in
years.
Product overview
These sensors are designed to work with a controller for data collection and operation. Multiple
controllers can be used.
4 English
Figure 1 Sensors left to right 8350.4, 8350.5 and 8351
1 Glass 3 Platinum ring
2 Tube containing Pt100 temperature sensor 4 PTFE Junction
Figure 2 Sensor 8362
1 AS9 connector 5 Retaining nut for the
measurement chamber
9 Sample out
2 Pt100 temperature sensor 6 Measurement chamber 10 Label to record the sensor
installation date
3 U-bolt 7 Electrodes support 11 Flat surface for wrench
4 Earth terminal 8 Sample in
Figure 3 Sensor 8417
1 Threaded sensor cap 3 Glass membrane
2 Sensor body
English 5
Installation
CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Sensor mounting
WARNING
Personal injury hazard. Always consider the temperature and pressure rating of the mounting hardware that is
used to install the sensor. The hardware material usually limits the temperature and pressure rating of the system.
835x series sensor
The sensors can be installed in any position.
• Insertion mounting: screw-in or flange fitting
• Immersion mounting: immersion shafts (0.5, 1, or 1.5 meters) with fixed, adjustable or clip-type
flange.
The sensors are fitted with 10 metres of cable as standard.
For longer cable lengths (up to 25 meters) use a junction box (08350=A=8500) and the 2654 cable
(358048,00000).
For cable lengths greater than 25 meters, use a pre-amplifier unit (08350=A=8000) and the
2666 cable (370=506=025). In this case it will not be possible to monitor the impedance.
Using the pre-amplifier unit
With this scenario it is impossible to connect the solution ground.
6 English
1 Model 2666 cable 9 -V - grey
2 Model 08350=A=8000 pre-amplifier 10 Input (measured pH or ORP) - green
3 Sensor 11 Temp+ (Pt100) - red
4 External shielding - EMC protection 12 Temp- (Pt100) - white
5 Temp+ (Pt100) - white 13 Ref. (reference) - black
6 Temp- (Pt100) - pink 14 Input (measured pH or ORP) - clear
7 Ref. (reference) - yellow 15 External shielding - EMC protection
8 +V - brown
Using the junction box
1 Model 2654 cable 9 External shielding - EMC protection
2 Model 08350=A=8500 junction box 10 External shielding - EMC protection
3 Sensor 11 Input (measured pH or ORP) - clear
4 Input (measured pH or ORP) - core 12 Ref. (reference) - black
5 Ref. (reference) - shielding 13 Temp+ (Pt100) - red
6 Temp+ (Pt100) - white 14 Temp- (Pt100) - white
7 Temp- (Pt100) - violet 15 Liquid earth (liquid contact) - blue
8 Solution ground (liquid contact) - yellow/green
For pH sensors only:
• Temperature measurement
• Impedance measurement (blue wire from the controller):
• Program the control frequency upper and lower limits (refer to the 9500 user manual):
• Glass impedance: 50 Mohm to 500 Mohm
• Reference impedance: 1 to 100 kohm
8362 sensor
The sensor is provided with two cables of 3 meters as standard, one for the pH sensor and one for
the temperature sensor. As an option, cables of 10 or 20 meters can be supplied. Attach the device
to a suitable static object using the U-bolt (No. 3 in Figure 2 on page 5).
Follow these instructions to install the sensor (the numbers reference Figure 2 on page 5):
English 7
1. Unscrew the measurement chamber (No. 6).
2. Remove the protector covering the pH bulb and rinse with deionized water or pH buffer and store
in a safe place for future use.
3. Gently shake the sensor downward in the same manner as a clinical thermometer to remove any
trapped air bubbles.
4. Record the installation date on the label (No. 10).
5. Screw the measurement chamber back in place.
6. Assemble the 1/8" NPT input/output connections and connect the sample inlet to position No. 8
and the outlet to position No. 9.
7. Circulate the sample and check visually through the chamber for the absence of bubbles which
could affect the measurement.
8. Adjust the flow rate to approximately 150 mL/minute.
9. To avoid back pressure it is advisable to discharge the sample at atmospheric pressure into a
drain.
10. The device should be grounded (No. 4) to avoid any external electrical noise interference.
11. To avoid damage to the sensor, make sure the flow chamber is never empty. Make sure the glass
bulb is always immersed in water or buffer solution.
8417 sensor
The sensor can be installed in any position. Mount the sensor using a standard PG13.5 threaded
cap.
To avoid damage to the sensor, make sure the glass bulb is always immersed in water or buffer
solution.
Maintenance
D A N G E R
Multiple hazards. Only qualified personnel should conduct the tasks described in this section of the manual.
Controller
Refer to the Maintenance section of the controller documentation.
Maintenance schedule
The maintenance schedule shows minimum times for regular maintenance tasks. Perform
maintenance tasks more frequently for applications that cause electrode fouling.
Maintenance task 90 days Annually
Clean the sensor X
Inspect sensor for damage X
Calibrate sensor Set by regulatory agencies or experience
8 English
Clean the sensor
WARNING
Chemical hazard. Always wear personal safety protection in accordance with the Material Safety Data Sheet for
the chemical that is used.
WARNING
Personal injury hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce the process
pressure to below 10 psi before removal. If this is not possible, use extreme caution. Refer to the documentation
supplied with the mounting hardware for more information.
Pre-requisite: Prepare a mild soap solution with a non-abrasive dishwashing detergent that does not
contain lanolin. Lanolin leaves a film on the electrode surface that can degrade the sensor
performance.
Examine the sensor periodically for debris and deposits. Clean the sensor when there is a buildup of
deposits or when performance has degraded.
1. Use a clean, soft cloth to remove loose debris from the end of the sensor. Rinse the sensor with
clean, warm water.
2. Soak the sensor for 2 to 3 minutes in a soap solution.
3. Use a soft bristle brush to scrub the entire measuring end of the sensor.
4. If debris remains, soak the measuring end of the sensor in a dilute acid solution such as < 5%
HCl for a maximum of 5 minutes.
5. Rinse the sensor with water and then return to the soap solution for 2 to 3 minutes.
6. Rinse the sensor with clean water.
Always calibrate the sensor after maintenance procedures.
Replacement parts and accessories
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
Description Item no.
Combination pH sensor for hydrofluoric acid environments with integrated temperature
sensor. 08350=C=0003
Combination pH sensor for high temperatures with protected sensor, impedance
control and integrated temperature sensor. 08350=C=0004
Combination pH sensor for waste water environments incorporating a protected, flat
sensor, impedance control and integrated temperature sensor. 08350=C=0005
Combination ORP sensor for high temperatures 08351=C=0000
PVC DN 40 flow chamber, flange fitting 08350=A=9500
PP immersion shaft, clip fitting (0.5, 1, 1.5 meter) 08350=A=1105/1
PP immersion shaft, adjustable flange (0.5, 1, 1.5 meter) 08350=A=1005/1
PP immersion shaft, fixed flange (0.5, 1, 1.5 meter) 08350=A=6005/1
PP chemical cleaning kit (nozzle and feed pipes) 08350=A=7000
Liquid reservoir unit 08350=A=4000
Junction box 08350=A=8500
Pre-amplifier for 8350 probes 08350=A=8000
English 9
Replacement parts and accessories (continued)
Description Item no.
Low-impedance cable, type 2666 370=506=025
High-impedance co-axial cable, type 2654 358048,00000
10 English
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