Hanna Instruments HI 98143-22 User Manual

Instruction Manual

HI 98143

pH/EC isolated

Transmitter

0 to 14 pH = 4 to 20 mA HI 98143-22 0 to 10 mS = 4 to 20 mA

These Instruments are in

http://www.hannainst.com

WARRANTYWARRANTY

WARRANTY

WARRANTYWARRANTY

HI 98143 is warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The electrode and the probe are war- ranted 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 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 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.

Compliance with the CE Directives

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

provide you with the necessary information for the correct operation of the meter. 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.

This instrument is in compliance with the

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

PRELIMINARY EXAMINATIONPRELIMINARY 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.

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 DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

GENERAL DESCRIPTIONGENERAL DESCRIPTION

HI 98143 is a pH/EC transmitter specially designed for long distance measurements of pH and Electrical Conductivity in industrial applications. It can be either panel- or wallmounted.

The pH and EC signals are isolated to avoid any interference with the receiving device.

Probes connectors, power supply, contacts and calibration trimmers are easy to reach directly on the front panel. For in-line applications the recommended pH electrode is the HI1001 while the conductivity probe is the HI3001. HI1001 is a combined double junction pH electrode with BNC and 3m cable; HI3001 is a 4-ring conductivity probe with platinum sensors and an internal temperature sensor to compensate reading for temperature changes. Both probes have external threads for easy installation in continuous flow-thru monitoring, for either in-line or tank applications.

They can resist up to 80C (176F) and 6 bar (87 psi). The instrument is supplied with a differential input. An

HI1283 stainless steel probe can be connected to prevent potential grounding problems and ensure longer life to the electrode.

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

directives.

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTIONFUNCTIONAL DESCRIPTION

1. pH Offset Calibration Trimmer

2. pH Slope Calibration Trimmer

3. BNC connector for pH Electrode

4. pH electrode (not included)

5. Potential Matching Pin (not included)

6. EC Probe (not included)

7. 1224 VDC power adapter (not included)

8. pH Output Terminals

9. EC Output Terminals

10. Power Supply Terminals

11. EC Slope Calibration Trimmer

12. EC Offset Calibration Trimmer

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONSSPECIFICATIONS

RangeRange

Range pH 0 - 14

RangeRange

AccuracyAccuracy

Accuracy pH ±0.5% f.s

AccuracyAccuracy

(@25C/77F)(@25C/77F)

(@25C/77F)

(@25C/77F)(@25C/77F)

TypicalTypical

EMCEMC

Typical

EMC pH ±2% f.s.

TypicalTypical

EMCEMC

DeviationDeviation

Deviation EC ±2% f.s.

DeviationDeviation Active OutputActive Output

Active Output pH 420 mA (isolated)

Active OutputActive Output

Temp.CompensationTemp.Compensation

Temp.Compensation Automatic from 0 to 60C with ß=2%/C

Temp.CompensationTemp.Compensation CalibrationCalibration

Calibration Manual with two trimmers

CalibrationCalibration

pH ProbespH Probes

pH Probes

pH ProbespH Probes

EC ProbeEC Probe

EC Probe HI3001 (not included) with cell constant 2.1

EC ProbeEC Probe Power supplyPower supply

Power supply External, 12 to 24 VDC (not included)

Power supplyPower supply DimensionsDimensions

Dimensions 160 x 105 x 31mm (6.2 x 4.1 x 1.2”)

DimensionsDimensions WeightWeight

Weight 280 g (9.9 oz)

WeightWeight

EC 0 - 10 mS/cm

EC ±2% f.s.

EC 420 mA (isolated)

Offset: ±2pH; Slope: 80110%

pH EC Slope: ±20%

HI1001 pH electrode (suggested) and HI1283 Potential Matching Pins (not included)

CONNECTIONSCONNECTIONS

CONNECTIONS

CONNECTIONSCONNECTIONS

pH ELECTRODE CONNECTION

• Connect the pH electrode to the BNC connector and the Potential Matching Pin to the PM terminal.

EC PROBE CONNECTION

• Probe wires are color coded for an easy operating. Follow the table below for proper installation.

Terminal # Probe Wire Color

Cond.Probe 1 green Cond.Probe 2 white Cond.Probe 3 red Cond.Probe 4 blue Temp.Sens. 1 brown Temp.Sens. 2 grey

SH yellow-green

POWER CONNECTION

• Connect a 2-wire cable to the 1224 VDC power source paying attention to its polarity.

OUTPUT CONNECTION

• Connect the pH output terminals to the pH receiver with a 2-wire cable, and the EC output terminals to the EC receiver with a second 2-wire cable. Pay attention to the polarity. At these contacts currents vary proportionally to the measured pH and EC values between 4 and 20 mA.

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

OPERATIONAL GUIDEOPERATIONAL GUIDE

• To minimize thermal drifts due to extreme temperature

fluctuations and in case of outdoors measurements, it is recommended to protect the transmitter with a proper casing.

• Connect pH electrode, EC probe, power supply and receiving devices to the transmitter by following the previous instructions.

• Remove the protective cap from the pH electrode and immerse it into the sample, at least 4 cm.

• When using the matching pin, dip it together with the pH electrode; otherwise, connect its terminal to the reference with a jumper wire.

• Immerse the EC probe in the sample.

• For continuous flow-thru measurements, the probes can be easily installed in any standard ½” pipe tee. Use Teflon tape between the probe and the pipe to ensure a leak free joint. Take care not to overtighten it, as excessive pressures can cause probe damage.

Note: to prevent damage to the electrode, disconnect the

pH electrode before turning the meter off.

CALIBRATIONCALIBRATION

CALIBRATION

CALIBRATIONCALIBRATION

For better accuracy, frequent calibration of the instrument is recommended. In addition, the instrument must be recalibrated for pH:

a) Whenever the electrode is replaced.

b) After testing aggressive chemicals.

c) At least once a month.

pH CALIBRATION

Pour small quantities of pH 7.0 (HI7007) and pH 4.0 (HI7004) solution into two clean beakers.

Calibration with pH 4.0 (HI7004) solution is recommended for measuring acidic samples. Use pH 10.0 (HI7010) solution if subsequent samples are alkaline.

• Connect a multimeter to the pH output terminals and set it to current readings.

• Turn the transmitter on.

• Rinse the electrode and immerse it in a pH

7.0 buffer together with the grounding probe. Stir gently and then wait for the reading to stabilize.

• Adjust the pH Offset Calibration Trimmer with a small screwdriver until the multimeter displays 12.00 mA.

• Rinse the pH electrode and the grounding probe, and immerse them in pH 4.0 (or pH 10.0) buffer. Stir gently and wait for a couple of minutes.

• Adjust the pH Slope Trimmer until the multimeter shows the corresponding mA value of the second buffer (8.57 mA for pH 4 and 15.43 mA for pH 10 solution).

The pH calibration is now complete.

EC CALIBRATION

• Connect a multimeter to the EC output terminals and set it to current readings.

• Turn the transmitter on.

• The HI3001 EC probe must be dry.

• Adjust the EC Offset Calibration Trimmer with a small screwdriver until the multimeter displays 4.00 mA.

• Pour a small quantity of 5.00 mS/cm calibration solution in a beaker.

• Immerse completely the tip of the EC probe in the conductivity solution.

• Tap the probe and stir it to ensure that no air bubbles are trapped inside the sleeve. In the case of in-line applications, to better simulate the installation ambient, put the probe tip close to the bottom edge of the beaker.

• Allow the reading to stabilize and then adjust the EC Slope Calibration Trimmer until the multimeter displays

12.00 mA.

The EC calibration is now complete.

MAINTENANCEMAINTENANCE

MAINTENANCE

MAINTENANCEMAINTENANCE

pH ELECTRODE MAINTENANCE

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

• When not in use, rinse the electrode with tap water to minimize contamination and store it with a few drops of storage (HI 70300) or pH 7 (HI 7007) solution in the protective cap. DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES.

• If the electrode has been left dry, soak the tip in a storage (HI 70300) or pH 7 (HI 7007) solution for at least one hour to reactivate it.

• To minimize clogging and provide longer life for the pH electrode, it is recommended to clean it monthly. Immerse the tip of the electrode in HI 7061 for one hour and then rinse it with tap water.

EC PROBE MAINTENANCE

• Remove the conductivity probe and rinse it with tap water. If a more thorough cleaning is desired, remove the protective plastic sleeve and clean the platinum sensors with a nonabrasive cloth or HI 7061 cleaning solution. Reinsert the sleeve while paying attention that the hole touches the threaded edge.

OUTPUTOUTPUT

OUTPUT

OUTPUTOUTPUT

Carefully follow the below connection diagram for active current output calibration.

CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY

CE DECLARATION OF CONFORMITY

CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY

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 this glass bulb all the time. The metal band at the end of the EC electrode is sensitive to electrostatic discharges. Avoid touching this metal band all the time. 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 voltages at the measurement surface exceed 24 VAC or 60 VDC. To avoid damages or burns, do not perform any measurement in microwave ovens.

ACCESSORIESACCESSORIES

ACCESSORIES

ACCESSORIESACCESSORIES

HI 1283 Stainless steel grounding probe with 2 m

(6.6’) cable

HI 1001 “flow-thru” double junction pH electrode with

3 m (6.6’) cable and BNC connector

HI 3001 “flow-thru” 4-platinum ring EC probe with 3

m (6.6’) cable and temperature sensor

HI 7004M pH 4.01 buffer solution, 230 mL bottle HI 7007M pH 7.01 buffer solution, 230 mL bottle HI 7010M pH 10.01 buffer solution, 230 mL bottle HI 77400P pH 4 & 7 solutions, 20 mL sachet (5 each) HI 7039M 5.00 mS/cm (EC) calibration solution, 230

mL bottle

HI 7061M Electrode cleaning solution, 230 mL bottle HI 710005 115 to 12 VDC power adapter HI 710006 230 to 12 VDC power adapter

IST98143-22 11/01