Hanna Instruments HI 8931, HI 8936, HI 8931A, HI 8936A, HI 8936AL Instruction Manual
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Instruction Manual
HI 8931 • HI 8936 Series
HI943500 Series
Conductivity Process
Controllers and Transmitters
www.hannainst.com
32
Dear Customer,
Thank you for choosing 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
correct use of the instruments, as well as a precise idea of thier
versatility in a wide range of applications.
If you need additional technical information, do not hesitate to e-mail
us at tech@hannainst.com
These instruments are in compliance with the directives.
TABLE OF CONTENTS
Preliminary Examination ............................................................ 4
General Description .................................................................... 4
Functional Description HI 8931 & HI 943500 ............................ 6
Functional Description HI 8936 ................................................ 10
Conductivity Probes .................................................................. 13
Specifications HI 8931 & HI 943500 ....................................... 15
Specifications HI 8936 ............................................................. 16
Connections .............................................................................. 17
Operational Guide ................................................................... 25
Calibration Procedure of HI 8931 & HI 8936 with HI 7635 .... 31
Calibration Procedure of HI 8931 & HI 8936 with HI 7638 .... 35
Calibration Procedure of HI 943500 with HI 7638................... 39
Conductivity Versus Temperature Chart ..................................... 41
Diagnostic Tests ........................................................................ 42
Installation Examples ............................................................... 44
Probe Maintenance and Cleaning ............................................ 46
Accessories ................................................................................ 47
Warranty................................................................................. 49
CE Declaration of Conformity ..................................................... 50
54
Four models with different measurement ranges are available to suit
any application needs:
• HI8931A / HI 943500A / HI8936A / HI8936AL
from 0.0 to 199.9 mS/cm
• HI8931B / HI 943500B / HI 8936B / HI 8936BL
from 0.00 to 19.99 mS/cm
• HI 8931C / HI 943500C / HI8936C / HI8936CL
from 0 to 1999 μS/cm
• HI 8931D / HI 943500D / HI8936D / HI8936DL
from 0.0 to 199.9 μS/cm
Other features include: recorder output in 0-20 mA or 4-20 mA
configuration; LED indicators (for HI 8931 and HI 943500) which
identify whether the controller is in operation mode or selection mode.
Each instrument of the HI 8931 and HI 943500 series, is supplied
with a plastic front cover and two mounting brackets. Power cables
are not included.
PRELIMINARY EXAMINATION
GENERAL DESCRIPTION
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 model is supplied complete with:
• Mounting brackets (not for HI 8936 series)
• Transparent splsh-proof cover (not for HI 8936 series)
• 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.
The HI 8931 and HI 943500 are panel-mounted conductivity controllers designed for simplicity of use in a wide range of industrial process
applications.
The instruments are designed with a standard DIN panel mount with
membrane keypads and large LCD on the front, and provide a series
of auto-diagnostic functions.
Probes, power supply, contacts and recorders are connected on the
rear panel through screw terminals.
Using HI 8931 in conjunction with a 4-20 mA output transmitter
(HI 8936 or HI 8936L series) will assure you of a strong, interferencefree signal at distances up to 300 meters (1000').
For in-line applications use the HI 7635 probe, while for tanks the
HI 7638 with external threads is recommended. These probes are
provided with built-in NTC sensor for temperature compensated
conductivity measurements. The probe cable length is 3 meters (10').
HI 943500 features a direct connection up to 20 m (67'), without
intermediate amplifiers, to the conductivity probe HI 7638 with DIN
connector and automatic temperature compensation.
76
Unplug the instrument from power supply before
replacing the fuse.
REAR PANEL OF HI 8931 SERIES
1. POWER OUTPUT terminals (+20 V and COM) for connec-
tion to a conductivity transmitter (HI 8936)
2. mA INPUT from a conductivity transmitter
3. mA OUTPUT terminals for connection to a recorder
4. SET SELECT terminals for reverse control operation
5. SET terminals for connection to a dosing pump
6. ALARM terminals for connection to an external alarm device
7. Power supply terminals
8. Fuse holder
FUNCTIONAL DESCRIPTION
HI 8931 & HI 943500
KEYPAD
MEASURE To read measurements and enable diagnostic tests
ΔAL To display set tolerance of the alarm
SET To set working point
TEST SLOPE Diagnostic function
TEST OFFSET Diagnostic function
When a key is pressed, the corresponding LED lights up to indicate that
the function is active.
TRIMMERS
OFFSET For offset calibration
SLOPE For slope calibration
ΔAL To set the alarm tolerance
COARSE To coarsely adjust the set point
SET FINE To finely adjust the set point
LEDS
SET ON To indicate that the dosage is active
ALARM To indicate an alarm condition
98
MECHANICAL DIMENSIONS
OF HI 8931 AND HI 943500
Front view of the panel-mounted unit
These 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 amount of room required to install the indicator
with the cables connected.
190mm MIN
7.50"
135mm
5.31"
0.25/4mm
0.01/0.160"
144mm
5.67"
ADJUSTABLE
LOCATION
BRACKET
141mm
5.55"
144m
m
5.67
"
69mm
2.71"
72mm
2.83"
REAR PANEL OF HI 943500 SERIES
1. DIN connector for conductivity probe
2. mA OUTPUT terminals for connection to a recorder
3. SET SELECT terminals for reverse control operation
4. SET terminals for connection to a dosing pump
5. ALARM terminals for connection to an external alarm device
6. Power supply terminals
7. Fuse holder
Unplug the instrument from power supply before
replacing the fuse.
1110
SIDE VIEW OF HI 8936 SERIES
1. Top cover
2. Cable glands for wiring
FUNCTIONAL DESCRIPTION HI 8936
1. Back cover
2. Top cover
3. Liquid Crystal Display
4. Screws for fastening the top cover
HI 8936A
HI 8936B
HI 8936C
HI 8936D
HI 8936AL
HI 8936BL
HI 8936CL
HI 8936DL
1312
CONDUCTIVITY PROBES
73mm
2.87"
52mm
2.04"
1" NP
T
142mm
5.60"
HI 7635 In-line Conductivity Probe
HI 7635 is a one piece, molded conductivity probe with pipe threads
(1" NPT) at both ends.
This allows the probe to attach to an in-line system, and to be used
in conjunction with the HI 8936 conductivity transmitter.
The HI7635 uses a 4-ring potentiometric measuring method. This
method is highly accurate and requires very little maintenance.
The construction of the housing is rugged, fiber-reinforced polypropy-
lene.
The maximum working pressure of this unit is 5 bar (72.5 psi).
Do not use in systems where the temperature exceeds 80°C (176°F).
HI7635
MECHANICAL DIMENSIONS OF
HI 8936A, HI8936B, HI 8936C, HI 8936D
MECHANICAL DIMENSIONS OF
HI 8936AL, HI8936BL, HI8936CL, HI 8936DL
110m
m
4.33
"
100mm
3.94"
HI 8614
165mm
6.50"
155mm
6.10"
4 x 4.3mm
4 x 0.17"
90mm
3.54"
110m
m
4.33
"
100mm
3.94"
HI 8614L
165mm
6.50"
155mm
6.10"
90mm
3.54"
4 x 4.3mm
4 x 0.17"
126mm
5.00"
45mm
1.77"
24mm
0.94"
58mm
2.28"
1514
SPECIFICATIONS HI 8931 & HI 943500
0.0 to 199.9 mS/cm
0.00 to 19.99 mS/cm
0 to 1999 μS/cm
0.0 to 199.9 μS/cm
±2% of Full Scale
excluding probe error
±2.5% of Full Scale
±0.4 mA
HI 8936 A or AL (not included)
HI 8936 B or BL (not included)
HI 8936 C or CL (not included)
HI 8936 D or DL (not included)
------
HI 7635 for in-line applications or
HI 7638 for tank (not included)
Manual, 2 point, through
offset and slope trimmers
See transmitter HI 8936
Automatic, 0 to 60°C with ß=2%
4 to 20 mA (isolated)
Isolated, 2A, Max. 240V, resistive
load, 1,000,000 strokes
115 or 230 Vac ±10%
(user selectable); 50/60 Hz
-10 to 50°C (14 to 122°F); RH 95%
141 x 69 mm (5.6 x 2.7")
1 kg (2.2 lb.)
DIN 43 700, 144x72 mm (5.7x2.8"),
black anodized aluminum;
front and back with shockproof ABS
plastic, and transparent cover
Range
HI 8931A - HI 943500A
HI 8931B - HI 943500B
HI 8931C - HI 943500C
HI 8931D - HI 943500D
Accuracy
(@20°C/68°F)
Typical EMC
Deviation
4-20mA INPUT from
Transmitter
HI 8931A
HI 8931B
HI 8931C
HI 8931D
HI 943500
Conductivity Probe
Calibration
Temp. Compensation
HI 8931
HI 943500
Recorder Output
Set Point Relay and
Alarm Relay
Power Supply
Environment
Panel Cutout
Weight
Enclosure
HI7638 Tank Conductivity Probe
HI7638 conductivity probe combines the proven 4-ring potentiometric
method of measuring conductivity with the platinum sensor and
stainless steel external thread.
This method incorporates a series of four platinum rings into the probe
shaft and is highly accurate requiring very little maintenance.
The removable plastic cover resists the harmful effect of most chemicals
and can be unscrewed for quick and simple maintenance.
This probe can withstand temperatures of up to 120°C (248°F) and
pressure of up to 5 bar (72.5 psi).
This probe is supplied complete with a 7-pin DIN connector.
HI 7638
1716
CONNECTIONS
REAR CONNECTIONS FOR HI 8931
• Power Connection Terminals
4-screw-terminal-strip for connection
to a 3-wire power cable according to
the indicated voltage (115 or 230V).
• IN/OUT Transmitter
2 wires of the 4-core signal cable
from the conductivity transmitter
(HI8936) have to be connected to
the mA input terminals and the
other 2 wires to the "+20 V" and
"COM" while paying careful attention to the polarity.
+20 V supply is the regulated DC supply required for the
operation of the external conductivity transmitter HI 8936.
• Set Contacts
Dosing pumps or other control equipment may be connected to the "SET"
(Max. 2A, 240 V) terminals. These
contacts act only as a "dry" switch
allowing electrical continuity, not as
a power supply.
SPECIFICATIONS HI 8936
0.0 to 199.9 mS/cm
0.00 to 19.99 mS/cm
0 to 1999 μS/cm
0.0 to 199.9 μS/cm
±2% of Full Scale
excluding probe error
±2% of Full Scale
±0.4 mA
HI 7635 for in-line applications or
HI 7638 for tank (not included)
Manual, 2 point, through
offset and slope trimmers
Fixed or automatic
from 0 to 50°C (32 to 122°F)
with ß=2%
4 to 20 mA not-isolated
max. 500 Ohm
12 to 30 Vdc
17 to 36 Vdc
IP 65
0 to 50°C (32 to 122°F);
RH max 95%
165 x 110 x 90 mm
(6.5 x 4.3 x 3.5")
1 kg (2.2 lb.)
Range
HI 8936 A/AL
HI 8936 B/BL
HI 8936 C/CL
HI 8936 D/DL
Accuracy
(@20°C/68°F)
Typical EMC
Deviation
Conductivity Probe
Calibration
Temperature
Compensation
Output
Power Supply
HI 8936 A/B/C/D
HI 8936 AL/BL/CL/DL
Protection
Environment
Dimensions
Weight
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