Hanna Instruments HI 99141 User manual

HI99141
Portable Waterproof
pH Meter for Boilers and Cooling
Towers
INSTRUCTION MANUAL

Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before
using this meter.
This manual will provide you with the necessary
information for correct use of this meter, as well as
a precise idea of its versatility.
If you need additional technical information, do not
hesitate to e‑mail us at [email protected] or view
our worldwide contact list at www.hannainst.com.
Dear
Customer,
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.

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TABLE OF CONTENTS
Table of Contents......................................................
Preliminary Examination ...........................................
General Description and Intended Use........................
Main Features..........................................................
Specifications...........................................................
Display Description...................................................
Operational Guide ....................................................
Meter Setup.............................................................
Battery Replacement.................................................
Accessories...............................................................
Electrode Maintenance..............................................
Certification..............................................................
Recommendations for Users ......................................
Warranty .................................................................
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PRELIMINARY EXAMINATION
Remove the meter from the packing material and examine
it carefully to make sure that no damage has occurred
during shipment. If noticeable damage is evident, contact
your local Hanna Instruments Office.
Each meter is supplied complete with:
• HI729113 preamplified pH probe with built‑in tem‑
perature sensor and matching pin, DIN connector with
1m (3.3’) cable
• pH 4.01 & 7.01 Buffer sachet
• HI700601 Electrode cleaning solution (2 sachets)
• 100 mL beaker (1 pc.)
• Alkaline batteries: 1.5V AAA (3 pcs.)
• Rugged carrying case
• Calibration certificate of meter
• Calibration certificate of probe
• Instruction manual
Note: Save all packing material until you are sure that
the meter functions correctly. All defective items must
be returned in the original packing together with the
supplied accessories.

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GENERAL DESCRIPTION and INTENDED USE
HI99141 is a portable, microprocessor‑based pH and
temperature meter specifically designed for boiler water or
cooling tower water measurements.
HI729113 is a rugged double junction pH electrode with a
flat pH sensor and titanium body.
The electrode has a peripheral Teflon®junction for maxi‑
mum surface contact and that flat pH tip is easy to clean and
prevents solids from collecting on the sensor. Chemicals
used to minimize scale, corrosion and foaming require an
optimum pH. Measuring and controlling water quality helps
minimize these effects.
The HI99141 pH meter is a portable, lightweight meter with
two button operation that is simple to use. It is delivered with
a rugged pH electrode protected by a titanium body that is
perfect for the pH measurement of treated boiler, feed water
and steam condensate.
A built‑in temperature sensor allows simultaneous tem‑
perature compensated pH and temperature readings and
an integral pH sensor preamplifier provides measurements
impervious to noise and electrical interferences.

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MAIN FEATURES
Main features:
• Simultaneous pH and temperature measurements on a
large dual‑line LCD display
• Automatic pH calibration at one or two points within
two memorized buffer sets (standard or NIST)
• Selectable temperature unit (°C or °F)
• Electrode condition indicator
• mV of pH measurement for electrode check
• HI729113 dedicated pH with integral temperature
sensor
• Probe quick connect system
• Battery life indication and low battery detection
• Keystroke confirmation tone
• Auto‑off function
• Waterproof casing IP67
Cooling towers
pH meter

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SPECIFICATIONS
* the HI729113 is limited to be used from 0 to 13 pH and from 0 to
80 °C temperature (32 to 176 °F).
Range*
‑2.00 to 16.00 pH / ‑2.0 to 16.0 pH
±825 mV (pH‑mV)
‑5.0 to 105.0 °C/23.0 to 221.0 °F
Resolution
0.01 pH / 0.1 pH
1 mV
0.1 °C/0.1 °F
Accuracy
@ 20 °C / 68 °F
±0.02 pH / ±0.1 pH
±1 mV (pH‑mV)
±0.5 °C up to 60 °C; ±1.0 °C outside
±1.0 °F up to 140 °F; ±2.0 °F outside
Temperature
compensation
Automatic
‑5.0 to 105.0 °C/23.0 to 221.0 °F
pH Calibration
Automatic, 1 or 2 point selectable buffer
set Standard: 4.01;7.01;10.01 or
NIST: 4.01;6.86;9.18
Probe (included)
HI729113, preamplified pH probe
with built‑in temperature sensor and
matching pin
Battery type / life 1.5V AAA (3 pcs.)
approx. 1400 hours of continuous use
Auto‑Off user selectable: after 8 min, 60 min or
disabled
Environment 0 to 50 °C (32 to 122 °F)
RH max. 100%
Meter Dimensions 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
Meter Mass
(with batteries) 196 g (6.91 oz.)
Case Ingress
Protection Rating IP67

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DISPLAY DESCRIPTION
1 Automatic Temperature Compensation indicator
2 Stability indicator
3 Battery percentage
4 Electrode condition indicator
5 Low battery indicator
6 Measurement unit
7 Primary LCD
8 Temperature unit
9 Secondary LCD
10 Meter modes indicator
11 pH calibration buffer(s) used

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OPERATIONAL GUIDE
Each meter is supplied with batteries. Before using the
meter for the first time, open the battery compartment
and insert batteries, observing the polarity (see “Battery
Replacement“).
TO CONNECT THE ELECTRODE
With the meter turned off, connect the HI729113 probe to
the DIN socket on the bottom of the meter by aligning the
pins and pushing in the plug firmly. Remove the protective
cap from the probe before taking any measurements.
TO TURN THE METER ON
To turn the meter ON, press the button on the front of the
meter. If it does not turn on, make sure that the batteries are
properly installed in their place. The meter is provided with
an active acoustic signal when a key is pressed. At start‑up
the meter displays all LCD segments for a few seconds,
followed by the percentage indication of the remaining
battery life, displaying “WAIT“ until electrode check is in
process then the meter enters the normal measurement
mode.
Note: The meter detects the presence and the type of
the probe at its input.
- If the probe is not connected the message “NO”
”PROBE“ appears alternatively on the secondary LCD
with “---“ blinking on the first LCD line.
- If the probe is not compatible “WRONG” ”PROBE“
message appears alternatively on the secondary LCD
with “---“ blinking on the first LCD line.
- If the readings are out of range, the nearest range
limits are displayed blinking (E.g. -2.00 pH -5.0 °C).
Battery life
Measurement
mode
LCD
check up
→ →
→
Electrode
check

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OPERATIONAL GUIDE
pH MEASUREMENT & CALIBRATION
Make sure the meter has been calibrated before use.
If the probe is dry, soak it in HI70300 storage solution for
30 minutes to reactivate it. If fouled, clean the electrode
by soaking in cleaning solution for 20 minutes, then rinse
the tip and soak in storage solution at least 30 minutes
before use.
Rinse the electrode off well and shake off excess droplets.
Recalibrate before using.
Submerge the probe in the sample to
be tested while stirring it gently. Wait
until the tag on the LCD disappears.
→
TO SELECT THE MEASUREMENT RANGE
While in measurement mode, press the SET button to select
pH or pH‑mV measurement on the first LCD line.
TO FREEZE THE MEASUREMENT VALUES
While in measurement mode, press and hold the SET
button until “HOLD“ appears on the secondary LCD. The
“HOLD“ remains for 1 second and reading of pH, mV
and temperature will be frozen on the LCD with“H” blinking.
Press any button to resume active measurements.
TO ENTER CALIBRATION MODE
Press and hold the button until ”POWER” and tag
is replaced by “STD“ and tag. Release the button.
TO ENTER SETUP MODE
Press and hold button until “STD“ and tag is re‑
placed by “SETUP“ and tag. Release the button.
TO TURN THE METER OFF
Whileinmeasurementmode,press the button.”POWER”
and tag will appear. Release the button.