Hanna Instruments HI 98143-01 User Manual
Instruction Manual
HI 98143
pH/EC isolated
Transmitter
0 to 14 pH = 0 to 1 VDC0 to 14 pH = 0 to 1 VDC
0 to 14 pH = 0 to 1 VDC
HI 98143-01HI 98143-01
HI 98143-01
HI 98143-01HI 98143-01
http://www.hannainst.com
HI 98143 is warranted for two years against defects in workmanship and materials when used for its 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.
0 to 14 pH = 0 to 1 VDC0 to 14 pH = 0 to 1 VDC
0 to 10 mS = 0 to 1 VDC0 to 10 mS = 0 to 1 VDC
0 to 10 mS = 0 to 1 VDC
0 to 10 mS = 0 to 1 VDC0 to 10 mS = 0 to 1 VDC
This Instrument is in
Compliance with the CE Directives
WARRANTYWARRANTY
WARRANTY
WARRANTYWARRANTY
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.
These instruments are in compliance with the
EN 50081-1 and EN 50082-1.
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 panel mounted pH/EC transmitter specially
designed for long distance measurement of pH and Electrical
Conductivity in industrial applications.
The pH and EC signals are transmitted through two wires.
Inputs 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 pH electrode should be HI1001
and conductivity probe should be HI3001. HI1001 is a
combined double junction pH electrode with BNC and 3 m
(10’) cable. HI3001 is a 4-ring conductivity probe with
platinum sensors and internal temperature sensor to compensate reading for temperature changes. Both the probes
have external threads for easy installation in continuous
flow-thru monitoring, either in-line or tank applications.
They can resist up to 80C (176F) and 6 bar (87 psi).
The HI 98143 is supplied with a differential input. An HI
1283 stainless steel probe to prevent potential grounding
problems can be connected thus ensuring longer life for your
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. 1224 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
Range
Accuracy(@ 25°C/77°F)
Typical EMC Deviation
Output pH 01 V (isolated)
Temperature Compensation
Calibration Manual with two trimmers
pH 0 to 14 pH
EC 0 to 10 mS/cm
pH ±0.5% f.s.
EC ±2% f.s.
pH ±2% f.s.
EC ±2% f.s
EC 01 V (isolated)
EC Automatic from 0 to 60C with ß=2%/ºC
pH Offset: ±2pH; Slope: 80110%
EC Slope ±20%
pH Probes HI1001 pH electrode (suggested) and
EC Probe HI3001(not included) with cell constant 2.1
Casing IP54
Power supply External 12 to 24 VDC (not included)
Dimensions 160x105x31mm (6.2x4.1x1.2”)
Weight 280 g (9.9 oz.)
HI1283 Potential Matching Pin (not included)
CONNECTIONSCONNECTIONS
CONNECTIONS
CONNECTIONSCONNECTIONS
pH ELECTRODE CONNECTION
• Connect the pH electrode to the BNC connector (#3)
and the Potential Matching Pin to the PM terminal.
EC PROBE CONNECTION
• Probe wires are color coded for an easy installation. See
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 1224 VDC power source
paying careful attention to its polarity.
OUTPUT CONNECTION
• Connect a 2-wire cable from the pH output terminals
(#8) to the pH receiver and another 2-wire cable from
the EC output terminals to the EC receiver paying
attention to the polarity. Voltages at these contacts vary
proportionally to the measured pH and EC values in the
range of 01 V.
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
• HI 98143 may be wall-mounted at any convenient
location close to the measurement site. To minimize
thermal drifts due to extreme temperature fluctuations,
particularly if measurements are conducted outdoors, it
is recommended that the transmitter is protected in a
casing.
• Connect pH electrode, EC probe, power supply and
receiving devices to the HI98143 according to previous
instructions.
• Remove the protective cap from the pH electrode and
immerse it into the sample, at least 4 cm.
• When the matching pin is used dip it together
with the pH electrode, if matching pin is not in
use, connect the matching pin terminal to the
Reference
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. The instrument should 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 (HI 7007)
and pH 4.0 (HI 7004) solution into two
clean beakers.
Calibration with pH 4.0 (HI 7004) solution is recommended
for measuring acidic samples. Use pH 10.0 (HI 7010)
solution if subsequent samples are alkaline.
• Connect a multimeter to the pH output terminals and
set it to Voltage readings.
• Turn the transmitter on.
• Rinse the electrode and immerse it in a pH
7.0 buffer with the grounding probe. Stir
gently and then wait for the reading to
stabilize.
better simulate the installation ambient,
the probe tip should be close to the
beaker bottom edge.
• Allow the reading to stabilize and then
adjust the EC Slope Calibration Trimmer
to read 500 mV on the multimeter LCD.
ACCESSORIESACCESSORIES
ACCESSORIES
ACCESSORIESACCESSORIES
HI 1283 Stainless steel grounding probe with 2 m
(6.6’) cable
HI 1001 “flow-thru” double junction pH electrode with3
m (6.6’) cable and BNC connector
HI 3001 “flow-thru” 4-platinum ring EC probe with 3
Matching Pin
• Adjust the pH Offset Calibration Trimmer with a small
screwdriver until the multimeter displays 500 mV.
HI 7004M pH 4.01 buffer solution, 230 mL bottle
HI 7007M pH 7.01 buffer solution, 230 mL bottle
m (6.6’) cable and temperature sensor
HI 7039M 5.00 mS/cm (EC) calibration solution, 230
mL bottle
OUTPUTOUTPUT
OUTPUT
OUTPUTOUTPUT
NOTE: The input is isolated from
output and power supply. The outputs aren’t isolated from power supply.
• Rinse and immerse the pH electrode and
the grounding probe in pH 4.0 (or pH 10.0)
buffer and stir gently.
• Wait a couple of minutes and then adjust the pH Slope
Trimmer until the multimeter shows the value of the
second buffer expressed in mV (286mV for pH4 and
714mV for pH10 solution).
The EC calibration is now complete.
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.
HI 7061M Electrode cleaning solution, 230 mL bottle
HI 710005 115 to 12 VDC power adapter
HI 710006 230 to 12 VDC power adapter
HI 77400P pH 4 & 7 solutions, 20 mL sachet (5 each)
• 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. Im-
The pH calibration is now complete.
EC CALIBRATION
• Connect a multimeter to the EC output terminals and set
it to Voltage readings.
• Turn the transmitter on.
• Leave the HI3001 EC probe in air (dry probe).
• Adjust the EC Offset Calibration Trimmer with the calibration screwdriver until the multimeter displays 0 mV.
• Pour a small quantity of 5.00 mS/cm calibration solution in a beaker.
• Immerse completely the tip of the EC probe into the
beaker with the conductivity solution.
• Tap the probe repeatedly on the bottom of the beaker
and stir it to ensure that
inside the sleeve. In the case of in-line applications, to
no air bubbles are trapped
merse the tip of the electrode in HI 7061 for one hour
and then rinse it with tap water.
EC PROBE MAINTENANCE
• When calibration can no longer be achieved, remove
conductivity probe from the system for maintenance.
Rinse the probe with tap water. If a more thorough
cleaning is desired, remove the plastic protective sleeve
and clean the platinum sensors with a nonabrasive
cloth or HI 7061 cleaning solution.
Reinsert the sleeve in the same direction as before, paying attention
the sleeve hole touches the threaded
edge.
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.
ISTR98143-01R1 02/01
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