Hanna Instruments HI 931700 User Manual
Instruction Manual
HI931700
HI932700
Panel - Mounted
pH - ORP Indicators
Controllers
http://www.hannainst.com
These Instruments are in
Compliance with the CE Directives
Dear Customer,
Thank you for chosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument.
This manual will provide you with all the necessary information for the correct use of the
instrument, as well as a precise idea of its
versatility in a wide range of applications.
These instruments are in compliance with
directives EN 50081-1 and 50082-1.
TABLE OF CONTENTS
Preliminary Examination ............................ 3
General Description ................................... 3
Functional Description HI 931700 .............. 5
Functional Description HI 932700 .............. 6
Mechanical Dimensions ............................. 8
Specifications HI 931700 ........................... 9
Specifications HI 932700 ........................... 9
Initial Preparation ..................................... 10
Operational Guide .................................... 12
Calibration ................................................ 13
Taking Redox Measurements................... 16
Electrode Conditioning and Maintenance. 19
Temperature-Resistance Correlation for
HANNA pH Sensitive Glass ..................... 24
Suggested Installations ............................ 26
Accessories .............................................. 28
Warranty................................................... 34
CE Declaration of Conformity .................. 35
ISO 9000 Certified
Company since 1992
2
PRELIMINARY 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.
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.
GENERAL DESCRIPTION
HI 931700 and HI 932700 respectively are pH
and ORP panel-mounted indicators and controllers designed for simplicity of use in a wide
range of industrial applications.
The models are panel mount designed with
membrane keypads on the front panel and a
12x30 mm LCD display. Connections to the
electrodes, power supply, contacts and recorders are made via the plug-in terminal
blocks on the rear panel.
The instruments are equipped with a BNC
socket and accept input direct from pH or ORP
electrode.
Other features include: recorder output 0 to
20mA or 4 to 20 mA as indicated; LED indicators which identify whether the controller is in
operation mode or selection mode.
3
FUNCTIONAL DESCRIPTION HI 931700
FRONT PANEL
HI 931700
pH CONTROLLER
pH
SET
ON
OFFSET
SLOPE
REAR PANEL HI 931700
SET MEA
SET
Keypad
SET To display and to set the working
point of pH dosage
MEASURE To set HI 931700 to the measure-
ment mode
Trimmers
OFFSET For Offset Calibration
SLOPE For Slope Calibration
SET To adjust the Set Point
Leds
SET ON To show that acidic or alkaline
dosage is in progress
4
1. Power Supply
15-24 VDC: 115 or 220 VAC:
P1 !Not Connected Earth
P2 ! Negative Neutral
P3 ! Positive Live
2. Acid/Base Dosage Selection (see page 10);
3. Connections for dosing pump to dose either
acid or base products. These contacts act
only as a switch for the power to the drive;
4. Recorder output(M1 ! + mA output,
M2 ! - mA output);
5. BNC for pH electrode;
6. Connection for Potential Matching Pin;
7. Connection for Electrode Reference.
Note: Be sure your main line is protected by
a fuse.
5
FUNCTIONAL DESCRIPTION HI 932700
FRONT PANEL
HI 932700
ORP CONTROLLER
mV
SET
ON
SLOPE
REAR PANEL HI 932700
SET MEA
SET
Keypad
SET To display and to set the working
point of ORP dosage
MEASURE To set HI 932700 to the measure-
ment mode
Trimmers
SLOPE For Slope Calibration
SET To adjust the Set Point
Leds
SET ON To show that oxidant or reduc-
tant dosage is in progress
6
1. Power Supply
15-24 VDC: 115 or 220 VAC:
P1 ! Not Connected Earth
P2 ! Negative Neutral
P3 ! Positive Live
2. Oxidant/Reductant dosage selection (see
page 10);
3. Connections for dosing pump to dose either oxidant or reductant products. These
contacts act only as a switch for the power
to the drive;
4. Recorder output(M1 ! + mA output,
M2 ! - mA output);
5. BNC for ORP electrode;
6. Connection for Potential Matching Pin;
7. Connection for Electrode Reference.
Note: Be sure your main line is protected by
a fuse.
7
MECHANICAL DIMENSIONS
Front view of the panel-mounted unit.
Dimensions show the cutout size for the installation and also the outside dimensions of the
panel.
42mm
1.65"
49mm
1.93"
73mm
2.87"
79mm
3.11"
Side view of the panel-mounted unit.
79mm
3.11"
0.25/4mm
0.01/0.160"
76mm
3"
95mm MIN
3.74"
ADJUSTABLE
LOCATION
BRACKET
Adjustable location brackets (supplied with
the meter) allow the controller to slide into the
cutout and will hold the unit securely in place.
95 mm (3.74") is the minimum amount of
space required to install the controller with the
cables connected.
8
SPECIFICATIONS HI 931700
HI 931700
Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.02 pH
Typical EMC
Deviation
±0.02 pH
Installation Cat. II
Input 1012 Ohm
Calibration Offset: ±2 pH through Offset trimmer
Slope: 80 to 110% through slope trimmer
Readout 4-digit LCD plus graphic symbols
Recorder Output 0 to 20mA or 4 to 20mA (not isolated)
Set Point Relay Isolated, 2A, max 240 V,
resistive load, 1.000.000 strokes
Power Supply 115±10% or 230±10% VAC, 50/60 Hz
or 15-24VDC (according to the model)
Environment -10 to 50°C (14 to 122°F)
Weight 130 g (4.58 oz)
SPECIFICATIONS HI 932700
HI 932700
Range -1000 to +1000 mV
Resolution 1 mV
Accuracy ±5 mV
Typical EMC
Deviation
Installation Cat. II
Input 1012 Ohm
Calibration Slope: 90 to 110% through slope trimmer
Readout 4-digit LCD plus graphic symbols
Recorder Output 0 to 20 mA or 4 to 20 mA (not isolated)
Set Point Relay Isolated, 2 A, max 240 V,
resistive load, 1.000.000 strokes
Power Supply 115±10% or 230±10% VAC, 50/60 Hz
or 15-24VDC (according to the model)
Environment -10 to 50°C (14 to 122°F)
Weight 130 g (4.58 oz)
±2 mV
9
INITIAL PREPARATION
• Connect a 3-wire (115 or
230VAC versions) or 2-wire
(15-24VDC version) power
Neutral
P1
Earth
P2
P3
Live
cable to the terminal strip
paying attention to the correct live, earth and neutral
(115 or 230VAC version)
or positive and negative
(15-24VDC version) terminal connections.
• Connect the pH or ORP
electrode to the BNC connector marked "INPUT
ELECTRODE".
• To benefit from the differential input, connect the proper electrode wire (if available) or a cable with a potential matching pin (grounding bar) to the relevant
terminal (# 6 at pages 5 and 7).
Note: When it is not possible to immerse
the Potential Matching Pin together with
the electrode in the solution, disable the
differential input by connecting the connection for Potential Matching Pin with
the connection for Electrode Reference
with a jumper wire.
• Recorder Terminals: these
contacts are the output terminals for connection to a
recorder. The output is from
M1
M2
0 to 20 mA or 4 to 20 mA
as indicated and is proportional to the measured pH
or ORP value.
Note: Calibrate the external recorder to be in
accordance with the display reading
(consult recorder manufacturer instruction manual).
• HI 931700 and HI 932700 are single set
point dosing controllers for dosing respectively acid or alkaline / reducing or oxidizing products.
HI 931700:
dose acid (e.g. in
hexavalent chromium re-
If you plan to
S1
S2
duction), make an open circuit between terminals
marked "S1" and "S2" on
the rear panel (description
on page 3).
If you plan to dose base
S1
S2
(e.g. in cyanide oxidation),
short terminals "S1" and
"S2".
HI 932700:
dose oxidants (e.g. in cya-
If you plan to
S1
S2
nide oxidation), make a
short circuit between terminals marked "S1" and "S2"
on the rear panel (description at page 5).
If you plan to dose reductants (e.g. in hexavalent
S1
S2
chromium reduction), make
an open circuit across terminals "S1" and "S2".
• Set Contacts: these contacts (maximum 2A, 220 V)
are used for connection to
dosing pumps. Use HI
931700 for dosage of acidic
C1
C2
or alkaline reagents, and
HI 932700 for dosage of
oxidizing or reducing reagents. Both units act as a
switch for power to the control element (e.g. pump).
Note: all external cables connected to the
rear panel should end with cable lugs.
10
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