Hanna Instruments WM 8910 User Manual
Instruction Manual
WM 8910 - WM 8911
WM 8912 - WM 8913
WM 8920 - WM 8923
WM 8930
Wall Mounted
ORP - pH - Conductivity
Controllers
http://www.hannainst.com
These Instruments are in
Compliance with the CE Directives
Dear Customer,
Thank you for choosing a Hanna Product.
Please read this instruction manual carefully before using the instru-
ment. This manual will provide you with the necessary information for
a correct use of the instrument, as well as a more precise idea of its
versatility. If you need more technical information, do not hesitate to
e-mail us at tech@hannainst.com.
These instruments are in compliance with the
EN 50081-1 and 50082-1.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
directives
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION
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, notify your Dealer.
Each wall-mounted meter is supplied complete with a power plug and
an instruction manual.
Note: Save all packing materials until you are sure that the
instrument functions correctly. Any defective item must be
returned in the original packaging together with the supplied
accessories.
PRELIMINARY EXAMINATION........................................................ 3
GENERAL DESCRIPTION ................................................................3
MECHANICAL LAYOUTS ................................................................. 4
FUNCTIONAL DESCRIPTION WM 8910 .......................................... 6
FUNCTIONAL DESCRIPTION WM 8911 .......................................... 9
FUNCTIONAL DESCRIPTION WM 8912 ........................................ 12
FUNCTIONAL DESCRIPTION WM 8913 ........................................ 14
FUNCTIONAL DESCRIPTION WM 8920 ........................................ 16
FUNCTIONAL DESCRIPTION WM 8923 ........................................ 18
FUNCTIONAL DESCRIPTION WM 8930 ........................................ 20
OPERATIONAL GUIDE ................................................................. 23
pH CALIBRATION ....................................................................... 27
ORP CALIBRATION ..................................................................... 28
CONDUCTIVITY CALIBRATION......................................................29
ADJUSTEMENT OF SETPOINT(S)..................................................31
pH VALUES AT VARIOUS TEMPERATURES...................................37
TAKING REDOX MEASUREMENTS................................................. 38
ELECTRODE CONDITIONING AND MAINTENANCE...........................40
SUGGESTED INSTALLATIONS FOR pH/ORP ELECTRODES...............43
CONDUCTIVITY PROBE MAINTENANCE & CLEANING...................... 45
ACCESSORIES.............................................................................45
WARRANTY ................................................................................ 53
CE DECLARATION OF CONFORMITY .............................................. 55
ISO 9000 Certified
Company since 1992
2
IMPORTANT:
1. Read the instructions before using the instrument.
2. Check that the voltage rating at the back of the instrument
corresponds to your mains voltage.
3. The instrument should be connected to a mains socket.
4. Never immerse the instrument in water.
5. The instrument is protected by a 2A fuse. Use only a 2A fuse to
replace it.
GENERAL DESCRIPTIONGENERAL DESCRIPTION
GENERAL DESCRIPTION
GENERAL DESCRIPTIONGENERAL DESCRIPTION
Hanna's wall-mounted pH, ORP and conductivity controllers
specifically designed to meet your process control requirements.
The controllers come equipped with power relays operating at a
maximum of 2A (240V).
Electrodes and probes can be installed quickly and easily. Simply plug
the universal BNC or DIN connector into the socket (and twist it into
a secured position).
Accurate measurements are displayed on a large LCD.
The Hanna WM series of controllers incorporate a triple contact alarm
system. When activated, the alarm contacts will open or close,
triggering the mechanism of your choice, whether a buzzer, light or
any other electrical device.
3
are
The recorder output terminals are isolated from the controller circuitry
to avoid any interference and are user-switchable between 0 to 20
mA or 4 to 20 mA.
These controllers are housed in a rugged, modular, fiber-reinforced
polypropylene housing.
When in operation, and with the transparent cover installed, the
units comply with the IP 54 standards.
All available models can be supplied in the 110/115V ("Part No./U")
or 220/240V ("/D") version.
Six models are available:
WM 8910 a single setpoint pH controller
WM 8911 a dual setpoint pH controller, specifically designed for
all those applications in which the pH value intends to
oscillate both up and down
WM 8912 pH and ORP controller, designed for numerous
industrial applications, but in particular for swimming
pools and drinking water sanitation
WM 8913 pH and conductivity controller,
designed primarily
for agricultural applications
WM 8920 a single setpoint ORP controller
WM 8923 pH and conductivity controller
for various applications especially in water heating/conditioning systems
(where, due to evaporation, alkalinity tends to increase)
WM 8930 conductivity controller, designed for industrial appli-
cations, especially water heating/conditioning systems.
MECHANICAL LAYOUTSMECHANICAL LAYOUTS
MECHANICAL LAYOUTS
MECHANICAL LAYOUTSMECHANICAL LAYOUTS
Fig. 2
Figure 2 illustrates the arrangement of the controls and contacts on
the pH controller, WM 8911. Layouts vary from model to model
based on their features and capabilities.
Fig. 3
Figure 3 is a dimensioned, bottom view of the Wall Mounted
Controller. The modular design isolates the control circuitry from the
contacts making it possible to make the connections and then seal the
compartment. Adjustments can then be made only in the control
area, without having to open the contacts compartment and run the
risk or interfering with the connections.
110mm
4.33"
pH
181mm
7.13"
164mm
6.45"
Fig. 1
Figure 1 displays the connectors for probes and electrodes, output
voltages for pumps, and input voltage for the power cord.
4
204mm
8.03"
221mm
8.70"
Fig. 4
Figure 4 is a dimensioned front view of the Wall Mounted Controller.
The molded, mounting holes in the corners provide quick, simple and
secure installation. No additional hardware is needed for mounting.
All electrical connections and controls are located on the front of the
instrument so that adjustment can be made without removing the
unit from the wall.
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FUNCTIONAL DESCRIPTION WM 8910FUNCTIONAL DESCRIPTION WM 8910
FUNCTIONAL DESCRIPTION WM 8910
FUNCTIONAL DESCRIPTION WM 8910FUNCTIONAL DESCRIPTION WM 8910
SINGLE SETPOINT, SINGLE SETPOINT,
SINGLE SETPOINT,
SINGLE SETPOINT, SINGLE SETPOINT,
pp
p
pp
FRONT PANEL
H CONTROLLERH CONTROLLER
H CONTROLLER
H CONTROLLERH CONTROLLER
– Three terminals marked "Out mA Select" to select between
0 to 20 mA or 4 to 20 mA isolated output.
10. Output contacts:
– Two terminals marked "°C Sensor" for the connection of a
silicon temperature probe for automatic temperature
compensation
– Two terminals marked "mA Output" for the isolated output
BOTTOM CONNECTIONS
Left panel
1. LCD display
2. Slope calibration trimmer
3. Coarse setpoint trimmer
4. Fine setpoint trimmer
5. Offset calibration trimmer
6. Selects actual measurement (MEASURE) or setpoint (SET) to
be displayed on the LCD
7. Graded dial for manual temperature compensation
Right panel
8. Triple contact alarm to select the alarm in a normally-closed
(NC) or a normally open (NO) position. The alarm contact is
activated when the pH varies by more than ±2.0 pH from
the setpoint.
9. Control contacts:
– Three terminals marked "Control Select" to choose acid or
basic dosing
– Three terminals marked "Temperature Compensation Select"
to select automatic (ATC) or manual temperature
compensation mode (MTC)
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1. BNC socket for a combination pH electrode
2. Input voltage supply socket
3. Output voltage socket (supplies power to a pump or
electrovalve). This socket is activated by a relay when the pH
has not reached the setpoint.
Unplug the instrument from the power supply before
replacing the fuse.
7
Specifications WM 8910D WM 8910U
RANGE 0.00 to 14.00 pH
RESOLUTION 0.01 pH
ACCURACY ±0.02 pH
(@20°C/68°F)
TYPICAL EMC ±0.1pH
DEVIATION
mA OUTPUT User selectable 0 to 20 mA or 4 to 20 mA
in a 0-14 pH range with isolated output
OFFSET Through "OFFSET" trimmer
CALIBRATION (Max. ±1.5 pH regulation)
SLOPE Through "SLOPE" trimmer
CALIBRATION from 80% to 110%
TEMPERATURE Manual or automatic
COMPENSATION from -10 to 80°C (14 to 176°F)
SETPOINT From 0.00 to 14.00 pH with 2 trimmers: "COARSE" for
RANGE an approximate regulation and "FINE" for fine tuning.
In addition, setpoint controls are activated through the
"CONTROL SELECT" terminals: "ACID"
or "BASE" for acid or basic dosage.
ALARM Through a relay which provides a normally open or a
CONTACT normally closed contact output (isolated output Max.
2A, Max. 240V, resistive load, 1,000,000 strokes).
The alarm contact will be activated if the pH
varies by more than ±2 pH from setpoint.
POWER SUPPLY 220/240V 110/115V
50/60Hz 50/60Hz
POWER SUPPLY One plug for the pH dosage (115 or 220V, depending
FOR DOSING on the model, Max.2A, 1,000,000 strokes)
ENVIRONMENT -10 to 50°C (14 to 122°F)
max. 85% RH non-condensing
PROTECTION IP54
WEIGHT 1.6 Kg (3.5 lb.)
ENCLOSURE 181 x 221 x 142mm (7.1 x 8.7 x 5.6")
MATERIAL Housed in rugged, fiber-reinforced polypropylene case
FUNCTIONAL DESCRIPTION WM 8911FUNCTIONAL DESCRIPTION WM 8911
FUNCTIONAL DESCRIPTION WM 8911
FUNCTIONAL DESCRIPTION WM 8911FUNCTIONAL DESCRIPTION WM 8911
DUAL SETPOINT, DUAL SETPOINT,
DUAL SETPOINT,
DUAL SETPOINT, DUAL SETPOINT,
pHpH
pH
pHpH
FRONT PANEL
CONTROLLER CONTROLLER
CONTROLLER
CONTROLLER CONTROLLER
Left panel
1. LCD display
2. Fine and Coarse trimmers to precisely set the lower level
3. Fine and Coarse trimmers to precisely set the higher level
4. Offset and Slope calibration trimmers
5. Selects actual measurement (MEASURE) or setpoint (SET) to
be displayed on the LCD
6. Selects "LO" and "HI" setting modes
7. Graded dial for manual temperature compensation
Right panel
8. Triple contact alarm to select the alarm in a normally-closed
(NC) or a normally open (NO) position. The alarm contact is
activated when the pH varies by more than -2.0 pH from
“SET LO” and +2.0 from “SET HI” setpoint values.
9. Control contacts:
– Three terminals marked "Temperature Compensation Select"
to select automatic or manual temperature compensation
mode
– Three terminals marked "Out mA Select" to select between
0 to 20 mA or 4 to 20 mA isolated output.
8
9
10. Output contacts:
– Two terminals marked "°C Sensor" for the connection of a
temperature probe for automatic temperature compensation
– Two terminals marked "mA Output" for the isolated output
BOTTOM CONNECTIONS
1. BNC socket for a combination pH electrode
2. Input voltage supply socket
3. Output voltage socket for acid dosing (supplies power to a
pump or electrovalve). This socket is activated by a relay
when the pH is higher than the "SET HI" value.
4. Output voltage socket for alkaline dosing (supplies power to a
pump or electrovalve). This socket is activated by a relay
when the pH value is lower than the "SET LO" value.
Specifications WM 8911D WM 8911U
RANGE 0.00 to 14.00 pH
RESOLUTION 0.01 pH
ACCURACY ±0.02 pH
(@20°C/68°F)
TYPICAL EMC ±0.1 pH
DEVIATION
mA OUTPUT User selectable 0 to 20 mA or 4 to 20 mA
in a 0-14 pH range with isolated output
OFFSET Through "OFFSET' trimmer
CALIBRATION (Max. ±1.5 pH regulation)
SLOPE Through "SLOPE" trimmer
CALIBRATION from 80% to 110%
TEMPERATURE Manual or automatic
COMPENSATION from -10 to 80°C (14 to 176°F)
SETPOINT RANGE From 0.00 to 14.00 pH with 2 trimmers:
"COARSE" for an approximate
regulation, "FINE" for fine tuning.
ALARM CONTACT Through a relay which provides a normally open
or a normally closed contact output (isolated
output Max.2A, Max.240V, resistive load, 1,000,000
strokes). The alarm contact will be activated if the
pH varies by -2.0 pH from "SET LO" and
+2.0 pH from "SET HI" points.
POWER SUPPLY 220/240V 110/115V
50/60Hz 50/60Hz
POWER SUPPLIES One plug for acid and another for alkaline dosage
FOR DOSING (115 or 220V, depending on the model,
Max.2A, 1,000,000 strokes)
ENVIRONMENT -10 to 50°C (14 to 122°F)
max. 85% RH non-condensing
PROTECTION IP54
WEIGHT 1.6 Kg (3.5 lb.)
ENCLOSURE 181 x 221 x 142mm (7.1 x 8.7 x 5.6")
MATERIAL Housed in rugged, fiber-reinforced polypropylene case
Unplug the instrument from the power supply before
replacing the fuse.
10
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FUNCTIONAL DESCRIPTION WM 8912FUNCTIONAL DESCRIPTION WM 8912
FUNCTIONAL DESCRIPTION WM 8912
FUNCTIONAL DESCRIPTION WM 8912FUNCTIONAL DESCRIPTION WM 8912
pHpH
& ORP CONTROLLER & ORP CONTROLLER
pH
& ORP CONTROLLER
pHpH
& ORP CONTROLLER & ORP CONTROLLER
FRONT PANEL
Left panel
1. LCD display for pH measurements
2. Graded dial for setting the pH setpoint (6.00 to 8.00 pH)
3. LED that lights up when the pH dosage is activated.
4. Offset (pH 7) and Slope (pH 4) calibration trimmers
5. LCD display for ORP measurements
6. Graded dial for setting the ORP setpoint (500 to 900 mV)
7. LED that lights up when the ORP dosage is activated.
Note: When both the LEDs are lit up simultaneously, pH takes
priority over ORP dosage.
Right panel
8. Triple contact alarm to select the alarm in a normally closed
(NC) or a normally open (NO) position. The alarm contact is
activated when the pH varies by more than ±2.0 pH from
the setpoint or the ORP by ±200 mV.
Unplug the instrument from the power supply before
replacing the fuse.
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BOTTOM CONNECTIONS
1. BNC socket for a combination pH electrode
2. BNC socket for a combination ORP electrode
3. Input voltage supply socket
4. Output voltage socket for pH dosing (activated by a relay
when pH is higher than setpoint)
5. Output voltage socket for ORP dosing (activated by a relay
when ORP is lower than setpoint)
Specifications WM 8912D WM 8912U
RANGE 0.00 to 14.00 pH and -1000 to +1000 mV
RESOLUTION 0.01 pH and 1 mV
ACCURACY ±0.02 pH and ±5 mV
(@20°C/68°F)
TYPICAL EMC ±0.1pH
DEVIATION ±6 mV
pH CALIBRATION 2 point through "pH 7" and
"pH 4" trimmers on the front panel
SETPOINT RANGE pH : from 6.00 to 8.00; ORP: from 500 to 900 mV
ALARM CONTACTS Normally open or normally closed isolated
outputs (Max.2A, Max.240V, resistive load, 1,000,000
strokes). Activated if the pH varies by ±2 pH or the
ORP by ±200 mV from setpoints.
POWER SUPPLY 220/240V – 50/60Hz 110/115V – 50/60Hz
POWER SUPPLIES One plug for acid and another for oxidizing
FOR DOSING dosage (115 or 220V, Max.2A, 1,000,000 strokes)
ENVIRONMENT -10 to 50°C (14 to 122°F); max. 85% RH non-condensing
PROTECTION IP54
WEIGHT 1.6 Kg (3.5 lb.)
ENCLOSURE 181 x 221 x 142mm (7.1 x 8.7 x 5.6")
MATERIAL Housed in rugged, fiber-reinforced polypropylene case
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FUNCTIONAL DESCRIPTION WM 8913FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913
FUNCTIONAL DESCRIPTION WM 8913FUNCTIONAL DESCRIPTION WM 8913
pH pH
& CONDUCTIVITY CONTROLLER& CONDUCTIVITY CONTROLLER
pH
& CONDUCTIVITY CONTROLLER
pH pH
& CONDUCTIVITY CONTROLLER& CONDUCTIVITY CONTROLLER
FRONT PANEL
BOTTOM CONNECTIONS
1. BNC socket for a combination pH electrode
2. DIN socket (7-pin) for HI 7637
conductivity probe with ATC
3. Input voltage supply socket
4. Output voltage socket for pH dosing (activated by a relay
when pH is higher than setpoint)
5. Output voltage socket for conductivity control (closed when the
conductivity is higher than setpoint)
Left panel
1. LCD display for pH measurements
2. Graded dial for setting the pH setpoint (4.00 to 10.00 pH)
3. LED that lights up when the pH dosage is activated.
4. Offset (pH 7) and Slope (pH 4) calibration trimmers
5. LCD display for conductivity measurements
6. Graded dial for conductivity setpoint (0.50 to 3.00 mS/cm)
7. LED that lights up when the conductivity dosage is activated
8. Offset (0 mS) and Slope (5.0 mS) calibration trimmers
Right panel
9. Triple contact alarm to select the alarm in a normally closed
(NC) or a normally open (NO) position (activated when the
pH varies by more than ±2.0 pH from the setpoint).
Unplug the instrument from the power supply before
replacing the fuse.
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Specifications WM 8913D WM 8913U
RANGE 0.00 to 14.00 pH and 0.00 to 19.99 mS/cm
RESOLUTION 0.01 pH and 0.01 mS/cm
ACCURACY ±0.02 pH and ±2% Full Scale
(@20°C/68°F)
TYPICAL EMC ±0.1 pH
DEVIATION ±2% Full Scale
CALIBRATION 2 point for each pH and conductivity
SETPOINT RANGE pH: 4.00 to 10.00; Conductivity: 0.50 to 3.00 mS/cm
ALARM CONTACTS Normally open or normally closed isolated outputs
(Max. 2A, Max. 240V, resistive load, 1,000,000 strokes).
Activated if the pH varies by ±2.0 pH or conductivity
by ±0.5 mS/cm from the setpoints.
POWER SUPPLY 220/240V – 50/60Hz 110/115V – 50/60Hz
POWER SUPPLIES One plug for the pH (acid) and another for conductivity
FOR DOSING control (115 or 220V, Max.2A, 1,000,000 strokes)
ENVIRONMENT -10 to 50°C (14 to 122°F)
max. 85% RH non-condensing
PROTECTION IP54
WEIGHT 1.6 Kg (3.5 lb.)
ENCLOSURE 181 x 221 x 142 mm (7.1 x 8.7 x 5.6")
MATERIAL Housed in rugged, fiber-reinforced polypropylene case
15
FUNCTIONAL DESCRIPTION WM 8920FUNCTIONAL DESCRIPTION WM 8920
FUNCTIONAL DESCRIPTION WM 8920
FUNCTIONAL DESCRIPTION WM 8920FUNCTIONAL DESCRIPTION WM 8920
SINGLE SETPOINT ORP CONTROLLERSINGLE SETPOINT ORP CONTROLLER
SINGLE SETPOINT ORP CONTROLLER
SINGLE SETPOINT ORP CONTROLLERSINGLE SETPOINT ORP CONTROLLER
FRONT PANEL
Left panel
1. LCD display
2. Slope calibration trimmer
3. Coarse set point trimmer
4. Fine set point trimmer
5. Offset calibration trimmer
6. Selects actual measurement (MEASURE) or setpoint (SET) to
be displayed on the LCD
Right panel
7. Triple contact alarm to select the alarm in a normally-closed
(NC) or a normally open (NO) position. The alarm contact is
activated when the mV varies by more than ±200 mV from
the setpoint.
8. Control contacts:
– Three terminals marked "Control Select" to choose REDOX or
OXYDT for dosing reducing or oxidant chemicals
– Three terminals marked "Out mA Select" to select between
0 to 20 mA or 4 to 20 mA isolated output.
9. Output contacts:
– Two terminals marked "mA Output" for the isolated output
Unplug the instrument from the power supply before
replacing the fuse.
BOTTOM CONNECTIONS
1. BNC socket for a combination ORP electrode
2. Input voltage supply socket
3. Output voltage socket (activated by a relay when the
measured reading is higher or lower than the setpoint
depending on the REDOX/OXYDT selection)
Specifications WM 8920D WM 8920U
RANGE -1000 to 1000 mV
RESOLUTION 1 mV
ACCURACY ±5 mV
(@20°C/68°F)
TYPICAL EMC ±6 mV
DEVIATION
mA OUTPUT User selectable 0 to 20 mA or 4 to 20 mA in
a -1000 to 1000 mV range with isolated output
CALIBRATION 2 point through trimmers
SETPOINT RANGE From -1000 to 1000 mV with 2 trimmers: "COARSE" and
"FINE" (activated through the "CONTROL SELECT" terminals:
"OXYDT" or "REDOX" for the oxidizing or reducing dosage)
ALARM CONTACT Normally open or normally closed isolated outputs
(Max. 2A, Max. 240V, resistive load, 1,000,000 strokes)
(activated when the ORP value varies by
more than ±200 mV from setpoint)
POWER SUPPLY 220/240V – 50/60Hz 110/115V – 50/60Hz
POWER SUPPLIES One plug for the oxidizing or reducing dosage (115 or 220V
FOR DOSING depending on the model, Max. 2A, 1,000,000 strokes)
ENVIRONMENT -10 to 50°C (14 to 122°F); max. 85% RH non-condensing
PROTECTION IP54
WEIGHT 1.6 Kg (3.5 lb.)
ENCLOSURE 181 x 221 x 142mm (7.1 x 8.7 x 5.6")
MATERIAL Housed in rugged, fiber-reinforced polypropylene case
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