Hanna Instruments HI 21 Series Manual de usuario

HI21 & HI22 Series

Wall-mounted,

Microprocessor-based

pH and ORP Controllers

Instruction Manual

All rights are reserved. Reproduction in whole or in part is prohibited without the

written consent of the copyright owner.

Dear Customer,

Thank you for choosing a Hanna Instruments Product.

Please read this instruction manual carefully before using the

instrument. It will provide you with the necessary information

for the correct use of the instrument, as well as a precise

idea of its versatility.

If you need additional technical information, do not hesitate

to e-mail us at [email protected].

These instruments are in compliance with the directives.

MODELS

The models HI21XYZ are pH controllers, while the models

HI22XYZ are ORP controllers.

HI21111 pH Controller with single setpoint, ON/OFF

control, analog output

HI21211 pH Controller with dual setpoint, ON/OFF

control, analog output

HI21221 pH Controller with dual setpoint, propor-

tional and ON/OFF controls, analog output

HI21222 pH Controller with dual setpoint, propor-

tional and ON/OFF controls, RS485 output

HI21523 pH Controller with control through analog

output, proportional and ON/OFF controls,

analog and RS485 outputs

HI22111 ORP Controller with single setpoint, ON/OFF

control, analog output

HI22122 ORP Controller with single setpoint, propor-

tional and ON/OFF controls, RS485 output

TABLE OF CONTENTS

PRELIMINARY EXAMINATION ..................4

GENERAL DESCRIPTION......................4

FUNCTIONAL DESCRIPTION ..................6

MECHANICAL DIMENSIONS. . . . . . . . . . . . . . . . . . . 7

SPECIFICATIONS HI21 & HI22.................8

INSTALLATION .............................9

SETUP MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CONTROL MODE .........................17

IDLE MODE ..............................25

ANALOG OUTPUT .........................26

RS485 COMMUNICATION & DATA LOGGING ....28

CALIBRATION ............................35

LAST CALIBRATION DATA ....................48

START-UP ................................51

FAULT CONDITIONS AND SELFTEST PROCEDURES . 52

pH VALUES AT VARIOUS TEMPERATURES .........56

ELECTRODE CONDITIONING AND MAINTENANCE 57

TAKING REDOX MEASUREMENTS ..............61

ACCESSORIES ............................63

WARRANTY ..............................69

CE DECLARATION OF CONFORMITY...........70

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and exam-

ine it carefully to make sure that no damage has occurred

during shipping. If there is any noticeable damage, please

contact your local Hanna Instruments Office.

Note Save all packing materials until you are sure that the instru-

ment functions correctly. Any damaged or defective items

must be returned in their original packing materials together

with the supplied accessories.

GENERAL DESCRIPTION

The product is a real time microprocessor-based pH/ORP

controller. It provides accurate measurements, flexible

ON/OFF, proportional or PID control capabilities and dual

alarm signals.

The system is composed of a case inside which the signal

conversion circuitry, the microprocessor circuitry and the

output power drivers are contained.

MAIN FEATURES OF DIFFERENT MODELS

• Display: large LCD with 4 ½ 13 mm digits and 3 ½ 7.7

mm digits.

• LEDs: three (HI22) or four (HI21) LEDs are provided for

signaling the energizing of relay 1 (a yellow LED), relay

2 (a yellow LED in HI21 Series only) and alarm relays (a

green and a red LED).

• Relays: Electromechanical type, working through NO,

COM and NC contacts; 1 or 2 output relays for acid or

base dosage; 1 output relay for alarm condition.

• RS485 isolated communication link.

• Calibration and Setup procedures allowed only through

an unlock password.

• Calibration: for HI21 series at 1, 2 or 3 points with

pH4.01, 7.01 and 10.01 buffers; for HI22 series in 1

or 2 points at 0, 350 and 1900 mV.

• Temperature compensation of the Hanna Instruments

standard buffers (for HI21 series only).

• Temperature compensation of the pH reading (for HI21

series only).

• Manual temperature setting when the temperature probe

is not inserted or temperature exceeds the upper range.

• Internally recorded last calibration data (non-volatile EE-

PROM memory): calibration date and time, pH offset, pH

slopes, number of calibration points and correspondent

pH values (for HI21 series only) or calibration date and

time and the mV calibration points used (for HI22 series

only).

• Input: pH electrode with BNC connector.

• ±5 Vdc output for amplified electrodes (max 10 mA).

• Output:

- isolated 0-1 mA, 10 Kmaximum load (optional);

- isolated 0-20 mA, 750 maximum load (optional);

- isolated 4-20 mA, 750 maximum load (optional);

- isolated 0-5 Vdc, 1 Kminimum load (optional);

- isolated 1-5 Vdc, 1 Kminimum load (optional);

- isolated 0-10 Vdc, 1 Kminimum load (optional).

• Real time clock.

FUNCTIONAL DESCRIPTION

FRONT PANEL

1. Liquid Crystal Display

2. LCD key exits from setup and calibration modes and reverts back to

normal mode (in idle or control phases with the measure-

ment on the display). In HI21 series, during pH calibration,

alternately displays pH buffer value or current temperature

3. CAL DATA key last calibration data viewing (enters and exits)

4. SETUP key enters setup mode

5. CAL key initiates and exits calibration mode

6. key increases the blinking digit/letter by one when selecting

a parameter. Advances forward while in last calibration

data viewing mode. Increases the temperature setting when

temperature probe is not inserted

7. key moves to the next digit/letter (circular buffer) when selecting

a parameter. Same as key during last calibration data

viewing mode

8. key decreases the blinking digit/letter by one when selecting

a parameter. Reverts backward while in last calibration

data viewing mode. Decreases the temperature setting

when temperature probe is not inserted

9. CFM key confirms current choice (and skips to the next item)

10. BNC Socket

11. LEDs

CONNECTIONS PANEL

1. 4-pin RS485 terminal (not for HI21XY1 and HI22XY1)

2. Analog output (not for HI21XY2 and HI22XY2)

3. Connections for Pt 100 temperature sensor

4. ±5V power supply output

5. Connection for Potential Matching Pin

6. Connection for electrode reference

7. Power supply input (1 Potential Earth, 2 Neutral, 3 Line)

8. Alarm terminal (1 F.S. Closed, 2 COM, 3 F.S. Open)

9. Relay 1 - first dosing terminal (not for HI21523) - (1 Normally Open, 2 COM,

3 Normally Closed)

10. Relay 2 - second dosing terminal (HI212XY models only) - (1 Normally Open,

2 COM, 3 Normally Closed)

Unplug the meter before starting any electrical connections.

FRONT VIEW BOTTOM VIEW

SPECIFICATIONS HI21 & HI22

Range

0.00 to 14.00 pH (HI21 series only)

±2000 mV (HI22 series only)

-9.9 to 120.0 °C

Resolution

0.01 pH (HI21 Series only)

1 mV (HI22 Series only)

0.1 ˚C

Accuracy

(@20 °C/68 °F)

±0.02 pH (HI21 Series only)

±2 mV (HI22 Series only)

±0.5 ˚C

Typical EMC

Deviation

±0.05 pH (HI21 Series only)

±4 mV (HI22 Series only)

1.0 ˚C

Analog Output 0 to 1 mA, 0 to 20mA, 4 to 20mA

0 to 5 Vdc, 1 to 5 Vdc, 0 to 10 Vdc

Digital Output RS485

Power Supply Input ±5V (for amplified electrodes)

Power Supply ‘‘-1’’ models: 115 ±10% Vac, 50/60 Hz

‘‘-2’’ models: 230 ±10% Vac, 50/60 Hz

Power Consumption 15 VA

Over Current Protection 450 mA, 250V, FAST FUSE

Relay 1 and 2

Electromechanical relay SPDT contact outputs,

5A- 250 Vac, 5A- 30 Vdc (resistive load)

(HI211YZ, HI212YZ and HI221YZ)

Fuse protected: 5A, 250V FAST FUSE

Alarm Relay

Electromechanical relay SPDT contact output,

5A- 250 Vac, 5A- 30 Vdc (resistive load)

Fuse protected: 5A, 250V FAST FUSE

Environment 0 to 50˚C (32 to 122 ˚F)

RH max 85% non-condensing

Protection IP54

Dimensions 221 x 181 x 86 mm (8.7 x 7.1 x 3.4’’)

Weight approximately 1.4 kg. (3.1 lb.)

INSTALLATION

HI21 and HI22 offer

a multitude of possibili-

ties, from single and dual

setpoints to ON/OFF,

proportional or PID dos-

age, isolated outputs with

user-selectable zoom,

bidirectional RS485, re-

corder outputs in mAmps

and Volts.

In addition, HI21 and

HI22 are both equipped

with the exclusive differen-

tial input.

In a system with poor

grounding, it is possible

to have a ground cur-

rent flowing through the

reference junction. This

can cause a rapid deg-

radation of the electrode.

The Hanna Instruments

differential input reduces

the likelihood of ground

loops.

See the diagram for a rec-

ommended installation.

• Power Supply: Connect a 3-wire power cable

to the terminal strip, while paying attention to

the correct line (L), earth (PE) and neutral (N)

terminal connections.

Power: 115VAC - 100 mA / 230VAC - 50 mA.

Line Contact: fused inside 400 mA.

PE must be connected to ground; leakage current 1 mA.

• Electrode: Connect the pH or ORP electrode to the BNC

socket (#10 at page 6).

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

(#5 at page 7).

Note When it is not possible to immerse the Potential Matching Pin

together with the pH electrode in the solution, disable the

differential input by connecting the Connection for Potential

Matching Pin (#5 page 7)

with the Connection for

Electrode Reference (#6 on

page 7) with a jumper wire.

• Pt 100 Terminals: these contacts (#3 at page 7) connect

the Pt 100 temperature sensor for automatic temperature

compensation of pH measurement. In the case of shielded

wire, connect the shield to pin 4.

In the case of a 2-wire sensor

connect the Pt 100 to pins 1 and

3, and short pins 2 and 3 with a

jumper wire.

If the Pt 100 has more than 2 wires,

connect the two wires of one end to

pins 2 and 3 (pin 2 is an auxiliary

input to compensate for the cable resistance) and one wire

from the other end to pin 1. Leave the

fourth wire unconnected, if present.

• Power Supply Output: these terminals

provide +5V and -5V DC (max current: 10 mA) signals

to supply power to amplified electrodes.

Note All cables connected to the panel should end with cable

lugs.

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