Hanna Instruments hi 98143-20 User Manual

Instruction Manual

HI 98143

pH/EC isolated

Transmitter

0 to 14 pH = 4 to 20 mA

HI 98143-20

0 to 10 mS = 4 to 20 mA

http://www.hannainst.com

These Instruments are in

Compliance with the CE Directives

Hanna Instruments reserves the right to modify the design, construction

and appearance of its products without advance notice.

WARRANTY

HI 98143 is warranted for two years against defects in workman-

ship 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 pur-

chase, 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 de-

partment and then send it with shipment costs prepaid. When shipping

any instrument, make sure it is properly packaged for complete protec-

tion.

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 Instru-
ments Inc., Woonsocket, Rhode Island, 02895 , USA.

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 directives.

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.

PRELIMINARY EXAMINATION

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 wall-

mounted.
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 cali-

brated at one or two points.

GENERAL 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

SPECIFICATIONS

Range

0.0 - 14.0

0 - 10 mS

Accuracy

±0.5% f.s

(@25°C/77°F)

±2% f.s.

Typical

Typical EMC

EMC

±2% f.s.

Deviation

±2% f.s.

Output

4÷20 mA (isolated)

Temp.Compensation

Automatic from 0 to 60°C with ß=2%/°C

Calibration

Manual with two trimmers

Offset: ±2pH; Slope: 80÷110%

Slope: ±20%

pH Probes

Probes

HI1001 pH electrode (suggested) and

HI1283 Potential Matching Pins (not included)

EC Probe

Probe

HI3001 (not included) with cell constant 2.1

Power

Power supply

supply

External, 12 to 24 VDC (not included)

Dimensions

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

Weight

280 g (9.9 oz)

FUNCTIONAL DESCRIPTION

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

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 voltages vary proportionally

to the measured pH and EC values between 4 and 20
mA.

•

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.

OPERATIONAL GUIDE

CONNECTIONS