Hanna Instruments HI 99141 User manual

HI99141
Waterproof
pH & Temperature Meter
for Boilers & 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.

3
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 .................................................................
5
6
8
14
16
7
9
17
15
4
18
19
19

4
PRELIMINARY EXAMINATION
PRELIMINARY EXAMINATION
Remove the instrument and accessories from the packaging
and examine it carefully to make sure that no damage
has occurred during shipping. Notify your nearest Hanna
Instruments Customer Service Center if damage is observed.
Each HI99141 is delivered in a rugged carrying case and
is supplied with:
• HI729113 pH/temperature probe with titanium body,
DIN connector and 1m (3.3’) cable
• HI70004 pH 4.01 buffer (1 sachet)
• HI70007 pH 7.01 buffer (1 sachet)
• HI700601 pH and ORP electrode cleaning solution
(2 sachets)
• 100 mL beaker (1 pc.)
• 1.5V AAA alkaline batteries
• Instrument quality certificate
• Electrode quality certificate
• Instruction manual
Note: Save all packing material until you are sure that
the instrument works correctly. Any damaged or defective
item must be returned in its original packing material
with the supplied accessories.

5
GENERAL DESCRIPTION AND INTENDED USE
GENERAL DESCRIPTION AND INTENDED USE
The HI99141 portable pH meter together with HI729113
double junction pH electrode is designed to measure boiler
and cooling tower water.
The HI99141 is a lightweight, portable, pH and temperature
meter. It features a two button operation system and is easy
to use. It has a waterproof and compact casing, large dual‑
line display, and automatic pH calibration at one or two
points.
The HI729113 has a large annular polytetrafluoroethylene
(PTFE) junction and a flat tip that prevents solids from
clogging the sensor. It has a built‑in temperature sensor for
temperature compensated pH readings and an integrated
preamplifier to provide measurements impervious to noise
and electrical interferences.

6
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 probe with integrated
temperature sensor
• Probe quick connect system
• Battery life indication and low battery detection
• Keystroke confirmation tone
• Auto‑off function
• Waterproof casing IP67

7
SPECIFICATIONS
SPECIFICATIONS
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
@ 25 °C / 77 °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/temperature
probe with titanium body, DIN connector
and 1 m (3.3’) cable
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”)
Weight
(with batteries) 196 g (6.91 oz.)
Case ingress
protection rating IP67
* the HI729113 is limited to be used from 0 to 13 pH and from 0 to
80 °C temperature (32 to 176 °F).

8
DISPLAY DESCRIPTION
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

9
OPERATIONAL GUIDE
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“).
CONNECTING 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.
TURNING 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.
Battery life
Measurement
mode
LCD check
up
→ →
→
Electrode
check
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).

10
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 soiled, 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.
SELECTING MEASUREMENT RANGE
While in measurement mode, press the SET button to select
pH or pH‑mV measurement on the first LCD line.
FREEZING 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.
ENTERING CALIBRATION MODE
Press and hold the button until ”POWER” and tag
is replaced by “STD“ and tag. Release the button.
ENTERING SETUP MODE
Press and hold button until “STD“ and tag is
replaced by “SETUP“ and tag. Release the button.
TURNING THE METER OFF
Whileinmeasurement mode,pressthe button.”POWER”
and tag will appear. Release the button.