Hanna Instruments HI 9146 User Manual

Instruction Manual

HI 9146

Dissolved Oxygen

and

Temperature Meter

www.hannainst.com

Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using this instrument. This manual will provide you with the necessary information for correct

use of this instrument, as well as a precise idea of their versatility. If you need additional technical information, do not hesitate to e-mail us

at tech@hannainst.com.

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

HI 9146 is guaranteed for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. Electrodes and probes are guaranteed for six months. This warranty is limited to repair or replacement free of charge. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packed for complete protection.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

WARRANTY ........................................................................................................... 2

PRELIMINARY EXAMINATION ................................................................................. 3

GENERAL DESCRIPTION ......................................................................................... 3

PROBE FUNCTIONAL DESCRIPTION ......................................................................... 4

METER FUNCTIONAL DESCRIPTION ......................................................................... 5

SPECIFICATIONS ................................................................................................... 7

OPERATIONAL GUIDE ............................................................................................. 8

AutoEnd ............................................................................................................. 12

DO CALIBRATION ................................................................................................. 12

GOOD LABORATORY PRACTICE (GLP) ..................................................................... 15

SETUP ................................................................................................................ 17

DO CONCENTRATION VERSUS SALINITY CHART ..................................................... 18

DO CONCENTRATION VERSUS ALTITUDE CHART ..................................................... 19

TEMPERATURE CALIBRATION (for technical personnel only) .................................. 20

BATTERIES REPLACEMENT .................................................................................... 21

LCD MESSAGE GUIDE ........................................................................................... 22

PROBE & MEMBRANE MAINTENANCE .................................................................. 23

TROUBLESHOOTING GUIDE .................................................................................. 25

ACCESSORIES ..................................................................................................... 26

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 damage, notify your Dealer or the nearest Hanna Customer Service Center. Each instrument is supplied with:

• HI 76407/2 DO probe with 2 m (6.7’) cable

• HI 76407A membarne cap (2 pcs.)

• HI 7041S electrolyte solution (30 mL)

• 3 x 1.5V AAA, Batteries

• Instruction Manual

• Rugged Carrying Case

Note: Save all packing material until you are sure that the instrument

functions correctly. All defective items must be returned in the original packing with the supplied accessories.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

HI 9146 is state-of-the-art, heavy-duty DO meter, designed to provide laboratory results and accuracy under harsh industrial conditions. This instrument is provided with a series of new diagnostic features and messages on the LCD which add an entirely new dimension to the measurement of DO, by allowing the user to dramatically improve the reliability of the measurement. The Auto Endpoint feature automatically freezes the display when a stable reading is reached. Dissolved Oxygen is indicated in ppm (parts per million) or in %. All measurements are automatically compensated for temperature. Salinity compensation in water allows direct determination of Dissolved Oxygen in saline waters and altitude compensation readjusts for the altitude variance. The Dissolved Oxygen probe has a membrane covering the polarographic sensors and a built-in thermistor for temperature measurements and compensation. This permeable PTFE membrane isolates the sensor elements from the testing solution, but allows Oxygen to pass through. When a voltage is applied across the sensor, oxygen that has passed through the membrane reacts causing a current flow, and hence determining a reading. The Battery Error Preventing System (BEPS) detects when the batteries become too weak to ensure reliable measurements. The backlight feature is automatically disabled when batteries are getting low and a clear indication is displayed to warn the user of this condition. However, the meter continues to measure correctly even when the low battery indication is displayed. The meter automatically switches itself off when the batteries are too weak to support proper function. In addition, the meter allow the user to enter an ID code to uniquely identify the instrument.

PROBE FUNCTIONAL DESCRIPTIONPROBE FUNCTIONAL DESCRIPTION

PROBE FUNCTIONAL DESCRIPTION

PROBE FUNCTIONAL DESCRIPTIONPROBE FUNCTIONAL DESCRIPTION

1. D.O. Probe

2. Protective Cap

3. Watertight Shielded Cable

4. Polypropylene Probe Body

5. Temperature Sensor

6. O-Ring Seal

7. Silver Chloride Anode

8. Platinum Cathode (sensor)

9. Oxygen Permeable PTFE Membrane

10. Membrane Cap

METER FUNCTIONAL DESCRIPTIONMETER FUNCTIONAL DESCRIPTION

METER FUNCTIONAL DESCRIPTION

METER FUNCTIONAL DESCRIPTIONMETER FUNCTIONAL DESCRIPTION

1) Liquid Crystal Display (LCD).

2) Range key, to select ppm or % range.

3) On/Off key, to turn the instrument ON and OFF.

4) CAL key, to enter/exit calibration mode.

5) Setup key, to enter/exit SETUP mode.

6) key, to manually increase temperature or other parameters.

7) Battery compartment cap.

8) DIN connector for DO probe.

9) key, to manually decrease temperature or other parameters.

10) GLP key, to display Good Laboratory Practice information. CFM key, to confirm different values.

11) AutoEnd key, to freeze first stable reading on the LCD.

12) Light key, to toggle display backlighting.

13) Secondary LCD.

14) Primary LCD.

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SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

Shipping

cap

black

red

FILLFIRST

THENTAP

THENSCREW

BACKON

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

INITIAL PREPARATION

The instrument is supplied complete with batteries. In order to place the batteries inside the instrument follow the instructions from page 21.

To take measurements, connect the DO probe to the meter securely by aligning the pins with the socket located on the back of the meter, pushing the plug in and tightening the threaded ring.

Probes shipped from Hanna Instruments are dry. To hydrate the probe and prepare it for use, connect it to the meter and proceed as follows:

1. Remove the red and black plastic cap.

This cap is for shipping purposes and can be thrown away.

2. Wet the sensor by soaking the bottom

2½ cm (1") of the probe in electrolyte (HI 7041S) for 5 minutes.

3. Rinse the membrane cap (HI 76407A

supplied in the kit with the meter) with electrolyte solution while shaking it gently. Refill with clean electrolyte solution.

4. Tap gently the sides of the membrane

cap with your finger tip to ensure that no air bubbles are trapped. To avoid damaging the membrane, do not tap it directly on the bottom.

5. Make sure that the rubber O-ring sits

properly inside the membrane cap.

6. With the sensor facing down, slowly

screw the cap clockwise. Some electrolyte will overflow.

When not in use and during polarization (see page 9), use the protective transparent cap supplied in the kit with the meter.

Turn the instrument ON by pressing On/Off.

At start-up the display will show all the used segments for a few seconds (or while the button is held), followed by the percentage indication of the remaining battery life.

• After a few seconds “Cond” message

appears, the “ ” and “WAIT” tags will blink on the LCD if probe is connected to inform the user that the probe is in auto-conditioning (automatic polarization) mode.

• When this message disappears, the probe

is polarized and the instrument can be calibrated.

• The meter is now ready to operate.

• If the probe is disconnected or broken, the

meter will display “----” and “NO Probe” tag blinking. In this situation only SETUP

menu is available. The auto-off feature turns the instrument off after a set period (default 20 min) with no button pressed to save battery life. To set another period or to disable this feature, see SETUP menu on page 17. The auto-off backlight feature turns the backlight off after a set period (default 1 min) with no buttons pressed. To set another period or to disable this feature, see SETUP menu on page 17.

PROBE POLARIZATION

The probe is under polarization with a fixed voltage of approximately 800 mV. Probe polarization is essential for stable measurements with the same recurring degree of accuracy.

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