Hanna Instruments HI 8931 A-D User Manual

Instruction Manual

HI 8931A/B/C/D HI 8936A/B/C/D

HI 8936AL/BL/CL/DL

HI 943500A/B/C/D

Conductivity

Process Instrumentation

These Instruments are in Compliance with the CE Directives

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. These instruments are in compliance with the directives.

TABLE OF CONTENTS

Preliminary Examination ............................................................ 3

General Description .................................................................... 3

Functional Description HI8931/HI943500 ................................... 5

Functional Description HI8936 .................................................... 9

Conductivity Probes .................................................................. 12

Specifications HI8931 & HI943500 .......................................... 14

Specifications HI8936 .............................................................. 15

Connections .............................................................................. 16

Operational Guide ................................................................... 24

Calibration Procedure of

HI8931 & HI8936 with HI7635.............................................. 30

Calibration Procedure of

HI8931 & HI8936 with HI7638.............................................. 34

Calibration Procedure of

HI943500 with HI7638 .......................................................... 38

Conductivity Versus

Temperature Chart................................................................... 41

Diagnostic Tests ........................................................................ 42

Installation Examples ............................................................... 44

Probe Maintenance and Cleaning ............................................ 46

Accessories ................................................................................ 47

Warranty................................................................................. 50

CE Declaration of Conformity ..................................................... 51

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

The HI 8931 and HI 943500 are panel mounted conductivity meters and 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 on the front, a large LCD and with autodiagnostic 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 series (or HI 8936L series, with LCD display) will assure you of a strong, interference-free signal at distances up to 300 meters (1000').

For in-line applications the probe should be HI 7635 and for tanks HI 7638 with external threads. These probes with built-in NTC sensor, provide 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 7-pin DIN connector and automatic temperature compensation.

Four models with different measurement ranges are available to suit individual applications:

HI8931A / HI 943500A

HI8936A / HI 8936AL

from 0.0 to 199.9 mS/cm

HI8931B / HI 943500B

HI8936B / HI 8936BL

from 0.00 to 19.99 mS/cm

HI 8931C / HI 943500C

HI8936C / HI 8936CL

from 0 to 1999 µS/cm

HI 8931D / HI 943500D

HI8936D / HI 8936DL

from 0.0 to 199.9 µS/cm

Other features include: recorder output in 0 to 20 mA or 4 to 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 is supplied with a plastic front cover and two mounting brackets. Power cables are excluded.

Transmitters and conductivity probes are supplied separately.

FUNCTIONAL DESCRIPTION

HI 8931 & HI 943500

KEYPAD MEASURE To read the measurement values and to enable the

diagnostic tests

∆AL To display the set tolerance of the alarm SET To set the working point TEST SLOPE Diagnostic function TEST OFFSET Diagnostic function

When each key is pressed the LED is lighted indicating to the user that the function is in operation.

TRIMMERS OFFSET For offset calibration

SLOPE For slope calibration ∆AL To set the alarm tolerance COARSE To coarsely adjust the set point SET FINE To finely adjust the set point

LEDS SET ON To show that the dosage is active

ALARM To show that the controller is in alarm mode.

THE REAR PANEL OF HI 8931A/B/C/D

1. Power OUTPUT Terminals (+20V and COM) for connection to a conductivity transmitter HI8936

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

8. Fuse Holder.

Unplug the instrument from power supply before the replacement of the fuse.

THE REAR PANEL OF HI 943500A/B/C/D

1. Conductivity Probe Connector (7-pin DIN)

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

7. Fuse Holder.

Unplug the instrument from power supply before the replacement of the fuse.

MECHANICAL DIMENSIONS OF HI 8931 AND HI 943500

Front view of the panel-mounted unit

69mm

2.71"

72mm

2.83"

141mm

5.55"

144mm

5.67"

These dimensions show the cutout size for the installation.

Side view of the panel-mounted unit

144mm

5.67"

0.25/4mm

0.01/0.160"

ADJUSTABLE LOCATION BRACKET

135mm

5.31"

190mm MIN

7.50"

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.

FUNCTIONAL DESCRIPTION

HI 8936

HI8936A HI8936B

HI8936C HI8936D

HI8936AL HI8936BL HI8936CL HI8936DL

1. Back Cover

2. Top Plastic Cover

3. LCD Display (for HI8936AL, HI 8936BL, HI8936CL, HI 8936DL

only)

4. Screws for fastening the top cover.

SIDE VIEW

HI 8936A HI8936B HI8936C HI8936D HI 8936AL

HI8936BL HI8936CL HI8936DL

1. Top Plastic Cover

2. Wire cable glands.

MECHANICAL DIMENSIONS

HI 8936A, HI8936B, HI8936C, HI 8936D

165mm

6.50"

100mm

3.94"

HI 8614

4 x 4.3mm

90mm

3.54"

4 x 0.17"

155mm

6.10"

MECHANICAL DIMENSIONS

HI 8936AL, HI8936BL, HI8936CL, HI 8936DL

110mm

4.33"

90mm

3.54"

24mm

0.94"

45mm

1.77"

4 x 4.3mm

4 x 0.17"

58mm

2.28"

165mm

6.50"

155mm

6.10"

126mm

5.00"

HI 8614L

100mm

3.94"

110mm

4.33"

CONDUCTIVITY PROBES

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 HI 7635 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).

142mm

5.60"

HI7635

73mm

2.87"

52mm

2.04"

1" NPT

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 cover is made of Ultem® which 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.

HI7638

SPECIFICATIONS HI 8931 & HI 943500

Range HI8931A - HI943500A HI8931B - HI943500B HI8931C - HI943500C HI8931D - HI943500D Accuracy (@20°C/68°F) Typical EMC

Deviation 4-20mA INPUT from Transmitter HI8931A HI8931B HI8931C HI8931D

HI943500 Conductivity Probe

Calibration

Temp. Compensation HI8931

HI943500 Readout

Recorder Output 1 Set Point Relay &

1 Alarm Relay Power Supply

Panel Cutout Environment Weight Enclosure

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

HI8936 A or AL (not included) HI8936 B or BL (not included)

HI8936 C or CL (not included)

HI8936 D or DL (not included)

------

HI7635 for in-line applications or

HI7638 for tank (not included)

Manual 2-point through offset and

slope trimmers

See transmitter HI8936

Automatic from 0 to 60°C with ß=2%

4-digit LCD plus graphic symbols

4 to 20 mA (isolated)

Isolated, 2A, Max. 240V, resistive

load, 1,000,000 strokes

110/115V or 220/240V (user selectable); 50/60 Hz 141 x 69 mm (5.6 x 2.7")

-10 to 50°C (14 to 122°F)

1 Kg (2.2 lb.)

DIN 43 700 144x72 mm (5.7x2.8") in

black anodized aluminum. Front and

back with shockproof ABS plastic and a

transparent cover.

SPECIFICATIONS HI 8936 & HI 8936L

Range HI8936A & AL HI8936B & BL HI8936C & CL

HI8936D & DL Accuracy (@20°C/68°F)

Typical EMC Deviation Conductivity Probe

Calibration

Temperature Compensation

Output

Power Supply HI8936A/B/C/D HI8936AL/BL/CL/DL

Protection Environment

Dimensions

Weight

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

HI7635 for in-line applications or

HI7638 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

0 to 50°C (32 to 122°F)

95% RH max

165 x 110 x 90 mm (LxWxH)

(6.5 x 4.3 x 3.5")

1 Kg (2.2 lb.)

IP 65

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 "+20V" and "COM" while paying careful attention to the polarity.

+20V supply is the regulated DC supply required for the operation of the external Conductivity Transmitter HI8936.

• Set Contacts

Dosing pumps or other control equipment may be connected to the "SET" (Max. 2A, 240V) terminals. These contacts act only as a "dry" switch allowing electrical continuity, not as a power supply.

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