Hanna Instruments HI 8510 User manual

1
www.hannainst.com
Panel Mounted
pH and ORP
Indicators and
Controllers
HI 8510 • HI 8512
HI 8710 • HI 8711
HI 8720
Instruction Manual

2
PRELIMINARY EXAMINATION .................................................................... 3
GENERAL DESCRIPTION ............................................................................ 3
MECHANICAL DIMENSIONS ...................................................................... 4
FUNCTIONAL DESCRIPTION HI 8510 ......................................................... 5
FUNCTIONAL DESCRIPTION HI 8512 ......................................................... 7
FUNCTIONAL DESCRIPTION HI 8710 ......................................................... 9
FUNCTIONAL DESCRIPTION HI 8711 ....................................................... 12
FUNCTIONAL DESCRIPTION HI 8720 ....................................................... 15
SPECIFICATIONS ................................................................................... 18
INITIAL PREPARATION ........................................................................... 21
OPERATIONAL GUIDE ............................................................................. 24
pH CALIBRATION ................................................................................... 28
pH VALUES AT VARIOUS TEMPERATURE .................................................. 30
pH DIAGNOSTIC TESTS ........................................................................... 31
ORP DIAGNOSTIC TESTS ......................................................................... 33
LED INDICATION .................................................................................... 34
TAKING REDOX MEASUREMENTS ............................................................ 35
ELECTRODE MAINTENANCE ..................................................................... 37
SUGGESTED INSTALLATIONS .................................................................. 40
ACCESSORIES ....................................................................................... 42
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using these instruments.
This manual will provide you with the necessary information for correct
use of these instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail
us at [email protected] or view our worldwide contact list at
www.hannainst.com.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
WARRANTYWARRANTY
WARRANTYWARRANTY
WARRANTY
HI 8510, HI 8512, HI 8710, HI 8711 and HI 8720 are guaranteed
for two years against defects in workmanship and materials when used
for their intended purpose and maintained according to instructions.
Electrodes and probes are guaranteed for six months. This warranty is
limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed
maintenance is not covered.
If service is required, contact the dealer from whom you purchased
the instrument. If under warranty, report the model number, date of
purchase, serial number and the nature of the problem. If the repair is
not covered by the warranty, you will be notified of the charges
incurred. If the instrument is to be returned to Hanna Instruments,
first obtain a Returned Goods Authorization number from the Technical
Service department and then send it with shipping costs prepaid. When
shipping any instrument, make sure it is properly packed for complete
protection.

3
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any noticeable damage, immediately notify your dealer.
Each model is supplied with:
• Transparent Splash-proof Front Cover
• Mounting Brackets
• Instruction Manual
Note: Save all packing materials until you are sure that the instrument
functions correctly. All defective items must be returned in the
original packing materials together with the supplied accessories.
HI 8510 and HI 8512 pH and ORP panel-mounted indicators, and
HI 8710, HI 8711 and HI 8720 pH and ORP controllers, are ideal for
process control monitoring in a wide range of industrial applications.
These instruments have been designed for easy and fast installation,
and are provided with membrane keypads on the front panel, large
display and autodiagnostic functions.
All connections are made through screw terminals on the rear panel.
Each model accepts either a direct input from a pH or ORP electrode or
from a transmitter through 4-20mA input. The instrument also
provides ±5V power output and input terminals for amplified
electrodes.
Moreover, you can choose the output configuration for connecting a
recorder or a PLC, between 0-20 or 4-20 mA.
Note: In order to avoid damages and erroneous readings:
• do never connect more than one electrode type (BNC, amplified
or input transmitter) to the instrument.
• do never use both the 0-20 mA and 4-20 mA recorder
outputs at the same time.
Other features include over time control function, selection of the dosing
direction (ACID, ALKALINE - HI 8710; OXID, REDUC - HI 8720) and the
possibility to set dosing action mode (OFF/AUTO/ON).
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION

4
The meters are provided with a black anodized aluminum body,
front and back panels in shockproof ABS plastic and a transparent
splash-proof front cover.
Front view of the panel-mounted unit
The dimensions show the cutout size for the installation.
Side view of the panel-mounted unit
Adjustable location brackets (supplied with the meter) allow the
indicator to slide into the cutout and will hold the unit securely in
place. 190 mm (7.50") is the minimum space required to install the
indicator with complete wiring.
MECHANICAL DIMENSIONSMECHANICAL DIMENSIONS
MECHANICAL DIMENSIONSMECHANICAL DIMENSIONS
MECHANICAL DIMENSIONS

5
FRONT PANEL
Keypad
SENSOR TEST To display the mV reading of the electrode and,
therefore, verify its working condition
pH 7 TEST To verify the internal circuit of the meter in
terms of Offset compensation
pH 4 TEST To verify the amplifier circuit of the meter
Note: Each time a key is pressed the corresponding LED is turned ON.
Trimmers
OFFSET For Offset calibration
SLOPE For Slope calibration
FUNCTIONAL DESCRIPTION HI 8510FUNCTIONAL DESCRIPTION HI 8510
FUNCTIONAL DESCRIPTION HI 8510FUNCTIONAL DESCRIPTION HI 8510
FUNCTIONAL DESCRIPTION HI 8510

6
Unplug the instrument from the power supply before replacing the fuse.
Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can be
used at a moment. Leave the other two inputs unconnected.
Only one of the two terminals 4-10 mA and 0-20 mA can be used
at one moment. Leave the other unconnected.
1. BNC socket for pH electrode
2. Input from amplified electrode
3. Connections for Pt100 temperature sensor
4. Power supply terminals
5. Fuse holder
6. Recorder output terminals
7. Connection to the transmiter
8. Power for amplified electrode
9. Connection for matching pin
10. Connection for reference electrode
REAR PANEL HI 8510

7
Keypad
0 mV TEST To verify the instrument calibration at 0 mV
1000 mV TEST To verify the slope at 1000 mV
Note: Each time a key is pressed the corresponding LED is turned ON.
Trimmers
CAL For ORP calibration
FRONT PANEL
FUNCTIONAL DESCRIPTION HI 8512FUNCTIONAL DESCRIPTION HI 8512
FUNCTIONAL DESCRIPTION HI 8512FUNCTIONAL DESCRIPTION HI 8512
FUNCTIONAL DESCRIPTION HI 8512

8
1. BNC socket for ORP electrode
2. Input from amplified electrode
3. Power supply terminals
4. Fuse holder
5. Recorder output terminals
6. Connection to the transmitter
7. Power for amplified electrode
8. Connection for matching pin
9. Connection for reference electrode
REAR PANEL HI 8512
Unplug the instrument from the power supply before replacing the fuse.
Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can be
used at a moment. Leave the other two inputs unconnected.
Only one of the two terminals 4-10 mA and 0-20 mA can be used
at one moment. Leave the other unconnected.

9
Keypad
SET To set the pH dosage limit
MEASURE To enter measurement mode and to enable
diagnostic tests
SENSOR TEST To display electrode mV reading and verify its
working condition
ΔALARM To display & set alarm tolerance
pH 7 TEST To verify Offset compensation
pH 4 TEST To verify amplifier circuit
Note: Each time a key is pressed the corresponding LED is turned ON
or changes its blinking behavior (ΔALARM).
Trimmers
OFFSET For Offset calibration
SLOPE For Slope calibration
ΔALARM To set the alarm tolerance
FRONT PANEL
FUNCTIONAL DESCRIPTION HI 8710FUNCTIONAL DESCRIPTION HI 8710
FUNCTIONAL DESCRIPTION HI 8710FUNCTIONAL DESCRIPTION HI 8710
FUNCTIONAL DESCRIPTION HI 8710

10
DOSAGE MODE SWITCH Blinks when the dosing switch is in OFF or ON
position.
SWITCH
OFF/AUTO/ON To set the dosing mode:
• OFF - dosing is disabled
• AUTO - automatic dosage, depending on
setpoint value and dosing selection
• ON - dosing always active
SET/COARSE To coarsely adjust the setpoint
SET/FINE To finely adjust the setpoint
LEDs
ACID (blinking) Shows that acid dosage is active
ALK. (blinking) Shows that alkaline dosage is active
ΔALARM (blinking) Indicates an active alarm

11
1. BNC socket for pH electrode
2. Input from amplified electrode
3. Connections for Pt100 temperature sensor
4. Connections for dosing pump
5. Reduc/Oxid dosage consent terminals
6. Alarm contacts
7. Power supply terminals
8. Fuse holder
9. Acid/Alkaline dosage selection terminals
10. Recorder output contacts
11. Connection to the transmitter
12. Power for amplified electrode
13. Connection for matching pin
14. Connection for reference electrode
15. Disable overtime connection
16. Overtime set knob (about 5 to 60 min)
REAR PANEL HI 8710
Unplug the instrument from the power supply before replacing the fuse.
Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can be
used at a moment. Leave the other two inputs unconnected.
Only one of the two terminals 4-10 mA and 0-20 mA can be used
at one moment. Leave the other unconnected.

12
ΔALARM To display and set the alarm tolerance
pH 7 TEST To verify Offset compensation
pH 4 TEST To verify amplifier circuit
Note: Each time a key is pressed the corresponding LED is turned ON
or changes its blinking behavior (ALK.SET, ACID SET,
ΔALARM).
Keypad
ALK. SET To set the working point of basic dosage
ACID SET To set the working point of acid dosage
MEASURE To enter measurement mode and to
enable diagnostic tests
SENSOR TEST To display electrode mV reading and,
therefore, verify its working condition
FRONT PANEL
FUNCTIONAL DESCRIPTION HI 8711FUNCTIONAL DESCRIPTION HI 8711
FUNCTIONAL DESCRIPTION HI 8711FUNCTIONAL DESCRIPTION HI 8711
FUNCTIONAL DESCRIPTION HI 8711

13
Trimmers
SLOPE For Slope calibration
OFFSET For Offset calibration
ΔALARM To set the tolerance of the alarm
ALK. SET
COARSE To coarsely adjust alkaline setpoint
FINE To finely adjust alkaline setpoint
ACID SET
COARSE To coarsely adjust acid setpoint
FINE To finely adjust acid setpoint
LEDs
ALK. SET (Blinking) Show that basic dosage is active
ACID SET (Blinking) Show that acid dosage is active
ΔALARM (Blinking) Indicate active alarm
ALK. DOSAGE MODE SWITCH Shows that the alkaline dosage switch
(Blinking) is in OFF or ON position
ACID DOSAGE MODE SWITCH Shows that the acid dosage switch is in
(Blinking) OFF or ON position
Switches
ALK. OFF/AUTO/ON
To set the dosing mode:
• OFF - dosing is disabled
• AUTO - automatic dosage, dependingon alkaline setpoint
value
• ON - dosing always active
ACID OFF/AUTO/ON
To set the dosing mode (see above) for acid setpoint value

14
1. BNC socket for pH electrode
2. Input from amplified electrode
3. Connections for Pt100 temperature sensor
4. Connections for dosing pump for acid
5. Connections for dosing pump for base
6. Alarm contacts
7. Power supply terminals
8. Fuse holder
9. Recorder output contacts
10. Connections to the transmitter
11. Power for amplified electrode
12. Connection for matching pin
13. Connection for reference electrode
14. Disable overtime connection
15. Overtime set knob (about 5 to 60 min)
REAR PANEL HI 8711
Unplug the instrument from the power supply before replacing the fuse.
Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can be
used at a moment. Leave the other two inputs unconnected.
Only one of the two terminals 4-10 mA and 0-20 mA can be used
at one moment. Leave the other unconnected.

15
Keypad
SET To set the working point of ORP dosage
MEASURE To enter measurement mode and to enable
diagnostic tests
ΔALARM To display and set the alarm tolerance
0 mV TEST To verify the instrument calibration at 0 mV
1000 mV TEST To verify the slope at 1000mV
Note: Each time a key is pressed the corresponding LED is turned ON
or changes its blinking behavior (ΔALARM).
FRONT PANEL
FUNCTIONAL DESCRIPTION HI 8720FUNCTIONAL DESCRIPTION HI 8720
FUNCTIONAL DESCRIPTION HI 8720FUNCTIONAL DESCRIPTION HI 8720
FUNCTIONAL DESCRIPTION HI 8720

16
Trimmers
CAL For ORP calibration
ΔALARM To display and set the alarm tolerance
SET/COARSE To coarsely adjust the setpoint
SET/FINE To finely adjust the setpoint
LEDs
OXID (Blinking) Show that the oxidant dosage is active
RED. (Blinking) Show that the reductant dosage is active
ΔALARM (Blinking) Indicate an active alarm
DOSAGE MODE SWITCH Blinks when the dosage switch is in OFF
or ON position.
Switches
OFF/AUTO/ON
To set the dosing mode:
• OFF - dosing is disabled
• AUTO - automatic dosage, dependingon setpoint value
and dosing selection
• ON - dosing always active

17
1. BNC socket for ORP electrode
2. Input from amplified electrode
3. Oxid/Reduc dosage consent terminals
4. Connections for dosing pump
5. Alarm contacts
6. Power supply terminals
7. Fuse holder
8. OXID/RED. dosage selection terminals
9. Recorder output contacts
10. Connections to the transmitter
11. Power for amplified electrode
12. Connection for matching pin
13. Connection for reference electrode
14. Disable overtime connection
15. Overtime set knob (about 5 to 60 min)
REAR PANEL HI 8720
Unplug the instrument from the power supply before replacing the fuse.
Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can be
used at a moment. Leave the other two inputs unconnected.
Only one of the two terminals 4-10 mA and 0-20 mA can be used
at one moment. Leave the other unconnected.

18
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HI 8512
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS

19
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20
HI 8720
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