Hanna Instruments HI 981406 User Manual

Instruction Manual

1 1

pH / ORP COMBO

(HI 981406)

pH & ORP Monitor

with Visual Alarm

This Instrument is in

Compliance with the

www.hannainst.com

WARRANTY

HI 981406 is warranted for one year against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. The electrodes are warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are 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 failure. If the repair is not covered by 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 Customer Service department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase.

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895 , USA.

Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.

CE Directives

Dear Customer, Thank you for choosing a Hanna product. This manual will provide

you with the necessary information for a correct operation. Please read it carefully before using the meter. 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.

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center.

The meter is supplied with:

• HI 1283 grounding bar

• Calibration screwdriver

• 12 VDC power adapter

Note: Conserve all packing material until the instrument has been

observed to function correctly. Any defective item must be returned in its original packing.

GENERAL DESCRIPTION

HI 981406, pH and ORP Monitor, is specially designed to meet the needs of simple continuous monitoring.

You can simply install the meter in the vicinity of a pool or the sample for continuous measurement of both pH and ORP.

The optimal HI 2114P/2 and HI 3214P/2 gel-filled pH and ORP electrodes are specially made for the pool applications. The BNC connector is protected behind a waterproof sheath.

You can select your own setpoint and be alerted through flashing LEDs when the values are outside limits and an intervention is required. The pH LED blinks when the values are higher than the setpoint. The ORP LED flashes when the measurements are below the setpoint.

Measurements are accurate and the meter can be calibrated at one or two points for pH.

You no longer need to worry about battery changes either: the unit runs without interruption on 12 VDC supplied adapter.

FUNCTIONAL DESCRIPTION

GR CHECK - COMB O

1. Liquid Crystal Displays

2. Alarm LEDs for pH and mV

3. pH 4.0/10.0 calibration trimmer

4. pH 7.0 calibration trimmer

5. BNC connectors

6. Protective sheaths

7. HI 2114P/2 pH electrode (optional)

8. HI 1283 grounding bar (included)

9. HI 3214P/2 ORP electrode (optional)

10. Power supply connector

11. 12VDC power adapter (included)

7.0

SPECIFICATIONS

HI 981406 pH/ORP COMBO

Range 0.0 to 14.0 pH ± 999 mV

690

1 0

Resolution 0.1 pH 1 mV Accuracy (@20°C/68°F) ±0.2 pH ±5mV Setpoint 5.0 to 9.0 pH 350 to 850 mV

pH Alarm LED blinks when pH reading is higher than setpoint ORP Alarm LED blinks when ORP reading is lower than setpoint pH Calibration Manual at 1 or 2 point Electrodes HI 2114P/2 replaceable pH electrode (optional)

HI 3214P/2 replaceable ORP electrode (optional)

HI 1283 grounding bar (included) Power supply External 12 VDC (adaptor included) Dimensions 165 x 110 x 35 mm (6.5 x 4.3 x 1.4’’) Weight 300 g (10.6 oz.)

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment. The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching the bulb at all times. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument’s EMC performance. To avoid electrical shock, do not use this instrument when voltage at the measurement surface exceeds 24 VAC or 60 VDC. To avoid damage or burns, do not perform any measurement in microwave ovens.

IS981406R2 06/02

OPERATIONAL GUIDE

pH and ORP Electrodes Connection

In order to protect the instrument against vapors and humidity, the BNC connectors are shielded behind waterproof sheaths.

• Slide the protective sheaths down. Connect the pH and the ORP electrodes to the BNC connectors and then slide the protective sheaths back up to the casing. For maximum waterproof protection, make sure the connectors are completely covered.

• Do not be alarmed if white crystals appear around the electrode protective cap. This is normal with pH and ORP electrodes and they dissolve when rinsed with water.

Taking Measurements

• Turn the meter on by connecting the 12VDC power adapter to the meter and the mains.

• Remove the protective cap from the pH and ORP electrodes.

• Immerse the tips (4cm/1½”) of pH, ORP electrodes and ground probe in the sample. In order not to affect the accuracy of measurements, electrodes should not touch or stand close to the vessel’s walls or bottom.

• The 2 LCDs will show the pH and ORP values. Allow the readings to stabilize.

Adjusting the Setpoint

With HI981406 you can select your own setpoints and be alerted through two independent pH and ORP alarm LEDs when an abnormal situation arises.

• Unscrew and remove the rear panel and gasket seal to access the MEASURE/SET switches and move them to the left (SET).

• With a small screwdriver adjust the setpoint trimmers to display the desired value shown on the LCD. You can choose to adjust one or both setpoints at once inside the following ranges:

pH: from 5.0 to 9.0 ORP: from 350 to 850 mV

The pH LED blinks when the pH is higher than the setpoint.

The ORP LED blinks when the ORP is lower than the setpoint.

• Move the switches back to MEASURE and secure the rear panel properly replacing the gasket.

Electrode Maintenance

• When not in use, rinse the electrodes with water to minimize contamination and store them with a few drops of storage (HI 70300) solution in the protective cap. Always replace the protective cap when not in use.

DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES.

• If the electrodes have been left dry, soak the tips in a storage (HI 70300) solution overnight to reactivate them.

• To minimize clogging and provide longer life for the electrodes, it is recommended to clean them at least once a month. Immerse the tip of the electrodes in a HI 7061 cleaning solution for half an hour and then rinse with tap water.

ORP Electrode

Check the accuracy of the meter by immersing the ORP electrode in a HI 7020 solution. The reading should be between 200 and 275 mV at 20°C (68°F). Otherwise clean the platinum tip of the electrode by rubbing it with a soft cotton or lint-free cloth soaked with HI 7061 cleaning solution, or alcohol

After cleaning, condition the ORP electrode by leaving it in a pretreatment oxidizing (HI 7092) solution for half an hour.

pH CALIBRATION

The instrument must be recalibrated whenever:

a) The pH electrode is cleaned or replaced. b) Where high accuracy is required. c) At least once a month.

pH Calibration

Pour a small quantities of pH 7.0 (HI 7007) and pH 10.0 (HI 7010) solution (or alternatively pH4.0) into two clean beakers.

For accurate calibration use two beakers for each buffer solution, the first one for rinsing the tip of the electrode and the second one for calibration.

pH 4.0 (HI 7004) is recommended for measuring acidic samples. Use pH 10.0 (HI 7010) if subsequent samples are alkaline.

• Turn the meter on and make sure that the MEASURE/SET switch is on MEASURE (inside the back cover).

• Remove the protective cap from the electrode, rinse and immerse it in the pH 7.0 buffer. Stir gently and then wait a couple of minutes for the reading to stabilize.

Note: The electrode should be submerged approximately 4 cm

(1½”) in the solution.

• Adjust the right hand trimmer (pH 7) with the calibration screwdriver until the LCD shows “pH 7.0”.

• Rinse and immerse the pH electrode in the pH 10.0 (or pH 4.0) buffer and stir gently.

• Wait a couple of minutes and then adjust the left hand trimmer (pH 4) until the LCD shows the value of the second buffer.

The pH calibration is now complete.

CE DECLARATION OF CONFORMITY

ACCESSORIES

HI 2114P/2 Double-junction, plastic body pH electrode with

2 m (6.6’) cable and BNC connector

HI 3214P/2 Double-junction, plastic body ORP electrode

with 2 m (6.6’) cable and BNC connector

HI 1283 * Stainless steel grounding bar with 2 m (6.6’)

cable

HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs) HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs) HI 70010P pH 10.01 solution, 20 mL sachet (25 pcs) HI 7004M pH 4.01 solution, 230 mL bottle HI 7007M pH 7.01 solution, 230 mL bottle HI 7010M pH 10.01 solution, 230 mL bottle HI 7020M ORP 200/275 mV solution, 230 mL HI 7092M Oxidizing solution, 230 mL HI 7061M Electrode cleaning solution, 230 mL bottle HI 710005 12 VDC power adapter, US plug HI 710006 12 VDC power adapter, European plug HI 710012 12 VDC power adapter, Australian plug HI 710013 12 VDC power adapter, Southern Africa plug HI 710014 12 VDC power adapter, UK plug

* To be replaced only by authorized service technicians