HI98192
USP Compliant
EC, TDS, NaCl, Resistivity,
Temperature Meter
INSTRUCTION MANUAL
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instrument.
This manual will provide you with the necessary information for correct
use of the instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e‑mail
us at tech@hannainst.com or view our worldwide contact list at
www.hannainst.com.
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.
PRELIMINARY EXAMINATION ............................................................................................
GENERAL DESCRIPTION ....................................................................................................
FUNCTIONAL DESCRIPTION ...............................................................................................
SPECIFICATIONS ..............................................................................................................
OPERATIONAL GUIDE .......................................................................................................
AUTORANGING ................................................................................................................
TEMPERATURE COMPENSATION ........................................................................................
CONDUCTIVITY VERSUS TEMPERATURE CHART....................................................................
USP MEASUREMENT ........................................................................................................
USP MODE PROCEDURES .................................................................................................
USER CALIBRATION ..........................................................................................................
EC CALIBRATION ..............................................................................................................
GOOD LABORATORY PRACTICE (GLP) ..................................................................................
SETUP ............................................................................................................................
LOG ON DEMAND .............................................................................................................
AUTOLOG ........................................................................................................................
AutoEnd ..........................................................................................................................
TEMPERATURE CALIBRATION (for technical personnel only) .................................................
PC INTERFACE ................................................................................................................
BATTERIES REPLACEMENT ................................................................................................
TROUBLESHOOTING GUIDE ...............................................................................................
PROBE MAINTENANCE ......................................................................................................
ACCESSORIES ...................................................................................................................
TABLE OF CONTENTS
4
5
6
7
9
14
15
16
17
21
25
26
33
35
47
50
52
53
56
63
64
65
66
3
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:
• HI763133 four‑ring conductivity/TDS probe with temperature sensor (1.5 m cable)
• HI7031M 1413 µS/cm calibration solution (230 ml)
• HI7035M 111.8 mS/cm calibration solution (230 ml)
• HI920015 Micro USB cable
• HI92000 PC Software
• 100 mL Plastic Beaker (2 pcs.)
PRELIMINARY EXAMINATION
• 1.5 V AA Batteries (4 pcs.)
• Instruction Manual and Quick Reference Guide
• Certificate
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.
4
The HI98192 instrument is state‑of‑the‑art, heavy‑duty conductivity meter, designed to provide
laboratory results and accuracy under harsh industrial conditions.
The USP standard compliance makes the instrument useful for pure water determination.
It is provided with a series of new diagnostic features which add an entirely new dimension to the
measurement of conductivity, by allowing the user to dramatically improve the reliability of the
measurement:
• 7 memorized standards (0.00 µS/cm, 84.0 µS/cm, 1.413 mS/cm, 5.00 mS/cm,
12.88 mS/cm, 80.0 mS/cm and 111.8 mS/cm) for calibration.
• EC calibration up to five calibration points.
• Messages on the graphic LCD for an easy and accurate calibration.
• Diagnostic features to alert the user when the electrode needs cleaning.
• User‑selectable “Outside Calibration Range” warning.
• User‑selectable “calibration time out” to remind when a new calibration is necessary.
Moreover, they offer an extended temperature range from ‑20.0 to 120.0 °C (‑4.0 to 248.0 °F),
using temperature sensor inside EC electrode.
This instrument can also measure in Resistivity, TDS and Salinity ranges. Three salinity modes are
available: % NaCl, Practical salinity and Natural seawater scale.
Other features include:
• Temperature source selection
• Temperature automatic compensation, linear or non linear user selectable
• Temperature reference selection 15 °C, 20 °C or 25 °C.
• Temperature coefficient set
• Log on demand up to 400 samples
• Auto Log feature up to 1000 records
• Auto Hold feature, to freeze first stable reading on the LCD
• Lock and user setup Fixed range selection
• GLP feature, to view last calibration data for EC, NaCl
• Probe change recognition
• PC interface
• Probe replatinization
GENERAL DESCRIPTION
5
FRONT VIEW
FUNCTIONAL DESCRIPTION
1) Liquid Crystal Display (LCD).
2) F1, F2, F3 functional keys.
3) / keys to manually increase/decrease the parameters or to scroll between the parameter
list.
4) ON/OFF ( ) key, to turn the instrument ON and OFF.
5) LIGHT ( ) key to toggle display backlighting.
6) GLP key, to display Good Laboratory Practice information.
7) CAL key, to enter/exit calibration mode.
8) SETUP key, to enter/exit SETUP mode.
9) RCL key, to enter/exit view logged data mode.
10) MODE key to toggle between EC, USP and Salinity ranges.
11) RANGE key, to switch between EC, Resistivity, TDS, NaCl.
12) HELP key to enter/exit contextual help.
13) ESC to leave current mode, exit calibration, setup, help. etc.
TOP VIEW
14) Electrode DIN connector.
15) USB connector.
6
EC
Resistivity
SPECIFICATION
Range 0 to 400 mS/cm
(shows values up to 1000 mS/cm)
Actual conductivity 1000 mS/cm
0.001 to 9.999 µS/cm*
10.00 to 99.99 µS/cm
100.0 to 999.9 µS/cm
1.000 to 9.999 mS/cm
10.00 to 99.99 mS/cm
100.0 to 1000.0 mS/cm (autoranging)
Resolution 0.001 µS/cm* / 0.01 µS/cm / 0.1 µS/cm
0.001 mS/cm / 0.01 mS/cm / 0.1 mS/cm
Accuracy ±1% of reading (±0.01 µS/cm or 1 digit whichever greater)
Range 1.0 to 99.9 Ω•cm
100 to 999 Ω•cm
1.00 to 9.99 KΩ•cm
10.0 to 99.9 KΩ•cm
100 to 999 KΩ•cm
1.00 to 9.99 MΩ•cm
10.0 to 100.0 MΩ•cm* (autoranging)
Resolution 0.1 Ω•cm / 1 Ω•cm / 0.01 KΩ•cm / 0.1 KΩ•cm /
1 KΩ•cm
0.01 MΩ•cm / 0.1 MΩ•cm*
Accuracy ±1% of reading (±10 Ω•cm or 1 digit whichever greater)
Range 0.00 to 99.99 ppm
100.0 to 999.9 ppm
1.000 to 9.999 g/L
10.00 to 99.99 g/L
TDS
Resolution 0.01 ppm / 0.1 ppm / 0.001 g/L / 0.01 g/L / 0.1 g/L
Accuracy ±1% of reading (±0.05 ppm or 1 digit whichever greater)
* The 0.001 µS/cm EC range and 0.1 MΩ•cm Resistivity range are not available with the
1.5 m cable probe.
100.0 to 400.0 g/L (autoranging)
7
Salinity
Temperature Range ‑20.0 to 120.0 °C (‑4.0 to 248.0 °F)
SPECIFICATION
Range % NaCl: 0.0 to 400.0 %
Seawater scale: 0.00 to 80.00 (ppt)
Practical salinity: 0.01 to 42.00 (PSU)
Resolution 0.1 % / 0.01 ppt / 0.01 PSU
Accuracy ±1% of reading
Resolution 0.1 °C (0.1 °F)
Accuracy ±0.2 °C (±0.4 °F) (excluding probe error)
EC Calibration
Cell Constant Setup 0.010 to 10.000
NaCl Calibration
Implemented Standards USP compliant
EC Probe HI763133 (8 pin DIN, 1.5 m cable)
Temperature Source Automatic from sensor inside the probe; Manual entry
Temperature Compensation NoTC, Linear, Non Linear ISO/DIS 7888 std
Reference Temperature 15, 20, 25 °C
Temperature Coeficient 0.00 to 10.00 %/°C
TDS Factor 0.40 to 1.00
Log on Demand 400 samples
Lot Logging
Memorized Profiles Up to 10
Measurement Modes Autorange, AutoEnd, LOCK and Fixed range
Battery Type / Life 1.5V AA batteries (4 pcs.) / 100h no backlight 25h with backlight
Auto Power Off User selectable: 5, 10, 30, 60 minutes or disabled
PC Connectivity Opto‑isolated USB
Dimensions 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)
Weight 400 g (14.2 oz)
Environment 0 to 50 °C (32 to 122 °F) max. RH 100% IP67
Automatic up to five points with seven memorized standards
(0.00 µS/cm, 84.0 µS/cm, 1.413 mS/cm, 5.00 mS/cm,
12.88 mS/cm, 80.0 mS/cm, 111.8 mS/cm)
Max. one point only in % range (with HI7037 standard);
use conductivity calibration for other ranges
5, 10, 30 sec, 1, 2, 5, 10, 15, 30, 60, 120, 180 min
(max 1000 samples)
8
INITIAL PREPARATION
The instrument is supplied complete with batteries. See Batteries Replacement for details, page 63.
To prepare the instrument for field measurements close the serial communication socket with proper
stopper (to ensure waterproof protection).
Connect the EC probe to the DIN connector on the top of the instrument. Tighten the thread ring. Make
sure the probe sleeve is properly inserted.
Turn the instrument ON by pressing ON/OFF key.
At start‑up the display will show the Hanna logo for a few seconds followed by the percentage indication
of the remaining battery life and the “Loading Log...” message, then enters the measurement mode.
The Auto Power Off feature turns the instrument off after a set period (default 30 min) with no button
pressed to save battery life. To set another period or to disable this feature, see SETUP menu on
page 35. The instrument continues to monitor the inputs and memorize readings if the automatic
logging is enabled and started. To stop autologging press StopLog key or simply power off the
instrument by pressing the ON/OFF key.
The Auto Light 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 35.
OPERATIONAL GUIDE
MEASUREMENTS
Immerse the probe into the solution to be tested. The sleeve holes must be completely submerged. Tap
the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve.
If needed, press RANGE repeatedly until the desired range (EC, Resistivity, TDS, Salinity) is selected
on the LCD.
Allow for the reading to stabilize. The main LCD line displays the measurement in the selected range,
while the temperature is displayed on the lower LCD line.
9
EC range
The conductivity range is from 0 to 400 mS/cm. The actual conductivity range (the uncompen‑
sated conductivity) is up to 1000 mS/cm. The instrument will display conductivity readings up to
1000 mS/cm.
OPERATIONAL GUIDE
Note: The symbol in front of the temperature reading means that the temperature can be
entered by the user (Manual option selected in SETUP, or temperature out of range).
Resistivity range
The reciprocal of the conductivity of a material is the resistivity.
TDS range
A conductivity measured value can be corrected to a total dissolved solids value using the TDS factor.
Salinity
The salinity is derived from the conductivity of a sample.
Salt % range
The percent of salinity in a sample is dependent on the sample and the salinity coefficient.
10
For practical reasons, the salinity of a solution is derived from the salinity of the seawater. Two methods
of calculating the salinity from the conductivity are supported:
• Natural seawater scale
• Practical salinity scale
Natural seawater scale (UNESCO 1966)
According to the definition, salinity of a sample in ppt is calculated using the following formula:
CT(sample)
RT=
C(35;15)·r
rT=1.0031·10
R=RT+10‑5RT(RT–1.0)(T–15.0)[96.7‑72.0RT+37.3R
S=‑0.08996+28.2929729R+12.80832R2–10.67869R3+5.98624R4–1.32311R
T
‑9 T4
–6.9698·10
‑7 T3
+1.104259·10
‑4 T2
+2.00564·10
2
–(0.63+0.21R
T
‑2
T+6.766097·10
2
)(T–15.0)]
T
‑1
5
where:
RT ‑ coefficient;
CT(sample) ‑ uncompensated conductivity at T °C;
C(35;15)= 42.914 mS/cm ‑ the corresponding conductivity of KCl solution
containing a mass of 32.4356 g KCl / 1 Kg solution;
rT ‑ temperature compensation polynom.
Note: The formula can be applied for temperatures between 10 °C and 31 °C.
To access this range press Mode while in Salinity range until the seawater scale [SW] is
displayed.
Practical salinity scale
OPERATIONAL GUIDE
This is a practical scale based on the precise measurement of the electrical conductivity of a solution
with a known salinity range.
The relationship derived from the scale relates salinity, conductivity, temperature and pressure
and use a solution with a salinity of 35 ‰ as datum point. This is taken to have a conductivity
of 42.914 mS/cm of 15 °C at standard atmospheric pressure.
11
According to the definition, salinity of a sample in PSU (practical salinity units) is calculated using
the following formula:
OPERATIONAL GUIDE
RT ‑ coefficient;
CT(sample) ‑ uncompensated conductivity at T °C;
C(35;15)= 42.914 mS/cm ‑ the corresponding conductivity of KCl solution
containing a mass of 32.4356 g KCl/1 Kg solution;
rT ‑ temperature compensation polynom
a0 = 0.008 b0= 0.0005
a1 = ‑0.1692 b1= ‑0.0056
a2 = 25.3851 b2= ‑0.0066
a
= 14.0941 b3= ‑0.0375
3
a
= ‑7.0261 b4= 0.0636
4
a
= 2.7081 b5= ‑0.0144
5
c
= 0.008
0
c
= 0.0005
1
X = 400R
Y = 100R
f (T)= (T‑15)/[1+0.0162(T‑15)]
T
T
12
Notes: The formula can be applied for salinity values between 0 and 42 PSU.
The formula can be applied for temperatures between -2 °C and 35 °C.
To reach this range press Mode while in Salinity range until the practical salinity scale [PSU] is
displayed.
Notes: If the meter displays the top of the range blinking, the reading is out of range.
If the stability indicator “ ” blinks, the reading is unstable.
Make sure the meter is calibrated before taking measurements.
If measurements are taken successively in different samples, for accurate readings it is recommend-
ed to rinse the probe thoroughly with deionized water before immersing it into the samples.
TDS reading is obtained by multiplying the EC reading by the TDS factor, which has a default
value of 0.50. It is possible to change the TDS factor in the 0.40 to 1.00 range by entering
SETUP mode.
The probes designed to work with this instrument have an internal ID identification. Every time the
instrument detects probe changing, it reminds the user to update the cell constant of the new probe
being used and to calibrate in the appropriate EC range.
OPERATIONAL GUIDE
13
The EC, Resistivity and TDS scales are autoranging. The meter automatically sets the scale with the
highest possible resolution.
By pressing Lock, the autoranging feature is disabled and the current range is frozen on the LCD.
The “Range: Locked” message is displayed. To restore the autoranging option press “AutoRng”
functional key again.
AUTORANGING
The autoranging mode is also disabled by selecting a fixed range in the SETUP menu. While in fixed
range mode the instrument will display the readings with the fixed resolution. A maximum of 6 digits
can be displayed. The top of the fixed range is displayed blinking when the reading exceeds this value.
To disable fixed range mode enter SETUP and select autoranging mode.
Note: Autoranging is automatically restored if the range is changed, if the calibration mode
is entered, or if the meter is turned off and back on again.
14
Two selectable temparature sources are available: reading directly from the sensor inside the probe
or manual entry.
Three options of compensating temperature are available:
Linear Temperature Compensation: The conductivity of a solution with a specific electrolyte
concentration changes with temperature. The relationship of the change in conductivity as a function
of temperature is described by a solution’s temperature coefficient. This coefficient varies with each
solution and is user selectable (see SETUP mode).
Non Linear Temperature Compensation: for natural water measurements.
The conductivity of natural water shows strong non linear temperature behavior.
A polynomial relationship is used to improve the accuracy of the calculated results.
TEMPERATURE COMPENSATION
Note: Conductivity measurements of natural water can only be performed at temperatures
ranging from 0 to 36 °C. Otherwise the “Out T range” message will be displayed blinking.
No Temperature Compensation (No TC): The temperature shown on the LCD is not taken into
account.
To select the desired option enter Setup menu (see page 35).
If the temperature is out of the ‑20 °C ‑ 120 °C range the instrument will do no temperature
compensation.
15
The conductivity of an aqueous solution is the measure of its ability to carry an electrical current by
means of ionic motion.
The conductivity invariably increases as the temperature rises.
It is affected by the type and number of ions in the solution and by the viscosity of the solution itself.
Both parameters are temperature dependent. The dependency of conductivity on temperature is
expressed as a relative change per Celsius degree at a particular temperature, commonly as percent
per °C (%/°C).
The following table lists the temperature dependence of the HANNA calibration buffers.
°C °F
0
5
10
15
16
17
CONDUCTIVITY VERSUS TEMPERATURE CHART
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32.0
41.0
50.0
59.0
60.8
62.6
64.4
66.2
68.0
69.8
71.6
73.4
75.2
77.0
78.8
80.6
82.4
84.2
86.0
87.8
HI7030
HI8030
(µS/cm)
7150
8220
9330
10480
10720
10950
11190
11430
11670
11910
12150
12390
12640
12880
13130
13370
13620
13870
14120
14370
HI7031
HI8031
(µS/cm)
776
896
1020
1147
1173
1199
1225
1251
1278
1305
1332
1359
1386
1413
1440
1467
1494
1521
1548
1575
HI7033
HI8033
(µS/cm)
64
65
67
68
70
71
73
74
76
78
79
81
82
84
86
87
89
90
92
94
HI7034
HI8034
(µS/cm)
48300
53500
59600
65400
67200
68500
69800
71300
72400
74000
75200
76500
78300
80000
81300
83000
84900
86300
88200
90000
HI7035
HI8035
(µS/cm)
65400
74100
83200
92500
94400
96300
98200
100200
102100
104000
105900
107900
109800
111800
113800
115700
117700
119700
121800
123900
HI7039
HI8039
(µS/cm)
2760
3180
3615
4063
4155
4245
4337
4429
4523
4617
4711
4805
4902
5000
5096
5190
5286
5383
5479
5575
16
Pharmaceutical laboratories working in the US market are obliged to respect the regulations set down
by the US Pharmacopoeia (USP). The 5th supplement of USP24‑NF19 lays down the rules for checking
the quality of pure or fully deionized water used for the production of injection products.
The conductivity of water provides information on its chemical composition. It is therefore logical that
conductivity is the main parameter to measure.
The conductivity of water is a measure of the ion mobility through this water. The conductivity partly
depends on the pH, the temperature and the amount of atmospheric carbon dioxide, which has been
dissolved in water to form ions (intrinsic conductivity). The conductivity also depends on the chloride,
sodium and ammonium ions initially present in water (extraneous conductivity).
The conductivity (intrinsic and extraneous) of the water is measured at Stage 1 and compared to
values listed in a table to evaluate if the studied water is suitable or not for use in pharmaceutical
applications. If the sample fails Stage 1, additional tests have to be performed (Stage 2 and 3) in
order to determine if the excessive conductivity value is due to intrinsic factors or extraneous ions.
USP Requirements
Automatic temperature correction must not be used.
Instrument specifications
Minimum resolution of 0.1 µS/cm on the lowest range. Excluding the cell accuracy, the instrument
accuracy must be ±0.1 µS/cm.
Meter calibration
It is accomplished by replacing the conductivity cell with precision resolution traceable to primary
standards (accurate to ±0.1% of the stated value) or an equivalently accurate resistance device.
Cell calibration
Meter conductivity must be measured accurately using calibrated instrumentation. The conductivity
cell constant must be known in ±2%.
Before starting water analysis calibrate in the lowest EC range or set the probe cell constant (enter
the value written in the calibration certificate delivered with the probe).
Stage 1
Determine the temperature and conductivity of the water.
• Rinse the probe carefully with deionized water. Check that the 4 rings, sleeve holes and the
temperature sensor are immersed in the sample and that no air bubbles are trapped. Connect
the probe to the meter, enter USP mode and press the Stage 1 key. The instrument will perform
a temperature and conductivity measurement (using a non‑temperature corrected conductivity
reading).
USP MEASUREMENT
17
• Using the Stage 1 temperature and conductivity requirement table the corresponding conductivity
limit at that temperature is determined.
• If the measured conductivity is not greater than the table value the water meets the requirements
of the test for conductivity. If the conductivity is higher than the table value, proceed with Stage 2.
Stage 1 table
Temperature and conductivity requirements *
(for the non‑temperature compensated conductivity measurements only)
USP MEASUREMENT
(*) Values from USP ‑ NF Fifth Supplement
Temperature
°C
0 0.6
5 0.8
10 0.9
15 1.0
20 1.1
25 1.3
30 1.4
35 1.5
40 1.7
45 1.8
50 1.9
55 2.1
60 2.2
65 2.4
70 2.5
75 2.7
80 2.7
85 2.7
90 2.7
95 2.9
100 3.1
Conductivity
µS/cm
18
Physical Tests / Water Conductivity (645) 3465‑3467
Stage 2
Determine the influence of CO2.
Note: Stability criteria <0.5 %/min corresponds in fact to a change in conductivity <0.02 µS/cm
per minute (equivalent to 0.1 mS/cm per 5 minutes), as required in the Stage 2 USP document.
• Transfer a sufficient amount of water (100 mL or more) to a thermostatic vessel, and stir the
test specimen. Adjust the temperature and maintain it at 25±1 °C. We recommend using a
thermostatic bath.
• Rinse the cell carefully with deionized water. Place the conductivity probe in the sample and dip
it in the thermostatic vessel containing the sample. Check that the 4 rings and sleeve holes are
immersed in the solution.
• Press Stage 2.
• When the conductivity value is stable, if the conductivity is not greater than 2.1 µS/cm the water
meets the requirements of the test, for conductivity.
If the conductivity is greater than 2.1 µS/cm proceed with Stage 3.
Stage 3
Determine the combined effect of the CO2 and pH.
Use a Hanna Instruments pH meter.
Take care that the instrument is calibrated in at least two points using pH 4.01 and pH 7.01 Hanna
buffers.
Perform the following test within approximately 5 minutes of the conductivity determination while
maintaining the sample temperature at 25±1 °C.
• Add the Saturated KCl Solution to the sample (0.3 mL per 100 mL of the test specimen), and
determine the pH to the nearest 0.1 pH unit.
• Press Stage 3 key, then enter the corresponding pH reading.
• Referring to the Stage 3 pH and conductivity requirement table the instrument determines the
conductivity limit at the measured pH value. If the measured conductivity is no greater than the
conductivity requirements for the pH determined the water meets the requirements of the test for
conductivity. If the measured conductivity is greater than this value or the pH is outside of the
range of 5.0 to 7.0, the water does not meet the requirements of the test for conductivity.
USP MEASUREMENT
19
(For atmosphere and temperature equilibrated samples only)
USP MEASUREMENT
Stage 3
pH and conductivity requirements
pH Conductivity
µS/cm
5.0 4.7
5.1 4.1
5.2 3.6
5.3 3.3
5.4 3.0
5.5 2.8
5.6 2.6
5.7 2.5
5.8 2.4
5.9 2.4
6.0 2.4
6.1 2.4
20
6.2 2.5
6.3 2.4
6.4 2.3
6.5 2.2
6.6 2.1
6.7 2.6
6.8 3.1
6.9 3.8
7.0 4.6
Press Mode key while in EC range to enter USP mode.
The instrument will display USP on the main screen.
Press Stage 1 to start with first stage evaluation.
Press Stage 2 to start with second stage evaluation.
If Stage 1 is pressed, a tutorial screen is displayed.
Use the / keys to scroll the tutorial message.
Press Continue to skip the tutorial message and enter EC measuring mode.
USP MODE PROCEDURES
If the temperature source is manual entry, press USP Fact. to select USP factor to be changed
(the is displayed before the 100% value). To increase the accuracy of the analysis decrease the USP
factor value.
Wait until reading is stable.
If the sample reading meets the USP Stage 1 criteria, the “USP Met” message will be displayed.
Press Report to view report.
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