www.hannainst.com
Instruction Manual
HI99551 • HI99556
Infrared Thermometers
for the Food Industry
Dear Customer,
Thank you for choosing a Hanna Instruments product.
This manual will provide you with the necessary information
for the correct operation of the meter.
If you need additional technical information, do not hesitate to
e-mail us at tech@hannainst.com.
Remove the instrument from the packing material and ex-
amine it carefully to make sure that no damage has occurred
during shipment. If there is any damage, contact your local
Hanna Instruments Office.
Each meter is supplied complete with:
•
HI765PW
temperature probe (
HI99556
only)
• 9V battery
• instruction manual
• quality certificate
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
FUNCTIONAL DESCRIPTION
1. Infrared sensor
2. Temperature probe connector (
HI99556
only)
3. Liquid Crystal Display (LCD)
4. ON/OFF button
5. IR/CONTACT button to select infrared sensor or external
probe (
HI99556
only)
6. Wrist-strap
GENERAL DESCRIPTION
HI99551
and
HI99556
thermometers employ infrared technol-
ogy to measure the surface temperature.
Infrared measurements are extremely practical with a fast
response time, typically around 1 second.
Another main advantage is the non-intrusive nature of the
measurement, which is particularly attractive in the food
industry since it translates itself into substantial savings by
leaving products intact, especially those sealed or pre-wrapped.
This type of non-intrusive measurement is also useful when the
surface temperature is high, for difficult-to-reach places or due
to hygiene requirements.
Simply point to the product or the spot and hold down the
measurement key. The measured value will be immediately
displayed on the LCD.
If in addition to surface measurement, you must check the core
temperature too, then
HI99556
is the ideal solution: simply
attach the external probe to the meter and you will have a 2-in-1
infrared-thermistor thermometer.
Different models are available, with different temperature ranges.
Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance notice.
SPECIFICATIONS
HI99551-00
HI99556-00
HI99551-01
HI99556-01
HI99551-10
HI99556-10
Range IR Sensor
-10 to 300 °C 14 to 572 °F -20 to 199.9 °C
Range Probe
(HI99556 only)
-40 a 150 °C -40 a 302 °C -40 to 150 °C
Resolution IR
Sensor
1 °C
1 °F
0.1 °C
Resolution Probe
(HI99556 only)
0.1 °C
1 °F
0.1 °C
Accuracy IR
Sensor
±2% of reading or ±2 °C (-00 and -10 models);
±2% of reading or ±3 °F (-01 models)
Accuracy Probe
(HI99556 only)
±0.5 °C (-20 to 120 °C)/ ±1 °F (0 to 250 °F)
±0.5 °C/ ±1 °F +1% reading (outside)
Typical EMC
Deviation IR
Sensor
±1 °C
±2 °F
±1 °C
Typical EMC
Deviation Probe
(HI99556 only)
±0.5 °C
±1 °F
±0.5 °C
IR Sensor
Response Time
1 second
Optic Coefficient
3:1 (ratio of distance to target diameter)
Minimum
Distance
30 mm (1.2’’)
Emissivity
0.95 (fixed)
Wave Length
6 - 14 µm
Probe
HI765W (included) (HI99556 only)
Battery Type
1 x 9V alkaline (IEC 6LR61)
Battery Life
approx. 150 hours of continuous use
Environment
0 to 50 °C (32 to 122 °F); RH max 95%
Demensions
143 x 80 x 38 mm (5.6 x 3.2 x 1.5’’)
Weight
320 g (11.3 oz.)
