Hanna Instruments HI 99550 User Manual

OPERATIONAL GUIDE

01/00

Before using these products, make sure that they are entirely suitable for the environ-

Operation of these instruments in residential area could cause unacceptable interferences

to radio and TV equipments, requiring the operator to take all necessary steps to correct

Any variation introduced by the user to the supplied equipment may degrade the

To avoid damages or burns, do not perform any measurement in microwave ovens.

EMISSIVITY
The instrument measures the temperature of objects with an

emissivity of 0.95, which is the characteristic of most sub­stances such as organic material, water, plastic, fabrics, etc.

To measure substances that have a polished surface and are
very reflective, the emissivity needs to be compensated. It is
advisable to cover the object with black paint or black
adhesive tap to compensate for the reflectivity.

PRECAUTION
To avoid damage, do not hold the sensor too close to a

heat source, for a long period.

SENSOR CLEANING
To maintain the instrument’s accuracy, it is important that

the sensor lens is kept clean. To clean the sensor gently pass
a humid and non-abrasive cloth (HI 731318) on the lens.

WEAK BATTERY
A blinking “V” on the display, indicates a weak battery. In

this case, replace the battery with a 9V alkaline one.

BATTERY REPLACEMENT

Battery replacement must only take place in a non-hazard­ous area using a 9V alkaline battery.

Simply slide off the battery cover on the back of the meter.
Detach the battery from the terminals and attach a fresh
9V battery while paying attention to the correct polarity.
Replace the battery and the cover.

CE DECLARATION

OF CONFORMITY

ACCESSORIES

HI 710004 Soft carrying case
HI 710007 Blue shockproof rubber boot
HI 710008 Orange shockproof rubber boot
HI 721316 Rugged carrying case
HI 731318 Wiping tissue (4 pcs)
HI 740016 Battery cover
HI 740029 9 V Battery
HI 740123 Wrist-strap

Recommendations for Users

ment in which they are used.

interferences.

instruments' EMC performance.

IS99550R2

Instruction Manual

FUNCTIONAL DESCRIPTION

Infrared

Thermometers

This instrument is in

Compliance with the CE Directives

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 [e-mail].

This instrument is in compliance with directives.

GENERAL DESCRIPTION

Infrared radiation emitted from any object depends on its
temperature.

HI 99550 and HI 99551 are thermometers based on the
infrared radiation technology.

The most evident advantage of infrared thermometry is the
non contact nature of measurement.
With HI 99550 and HI 99551, the temperature measure­ment is simple: simply aim the thermometer at the object
and then press and hold down the ON/OFF button.
These instruments are equipped with a “HOLD” function,
which freezes the display, making it easy for the user to
read the measurement.
The different models are:

HI 99550-00 measures in Celsius,
HI 99551-00 measures in Celsius,
HI 99550-01 measures in Fahrenheit,
HI 99551-01 measures in Fahrenheit,
HI 99551-10 measures in Celsius.

The thermometers also provide for a low battery indication.

WARRANTY

against

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and
examine it carefully to make sure that no damage has
occurred during shipment. If there is any damage, notify
your Dealer.

The instrument is supplied complete with

• 9V Battery

• Instruction manual

Note: Conserve all packing material until the instrument

has been observed to function correctly. Any defective
item must be returned in its original packing.

SPECIFICATIONS

HI 99550-00 HI 99550-01
HI 99551-00 HI 99551-01 HI99551-10
Range -10 to 300 °C 14 to 572 °F -20.0 to199.9°C
Resolution 1 °C 1 °F 0.1°C
Accuracy ±2% of reading

(@ 20°C/68°F) or ±2°C/±3°F

Typical EMC Deviation ±2 °C/±4 °F
Emissivity 0.95 (fixed)
Wave length 6 to 14 µm
Typical response time 1 second
Optic coefficient 3 : 1

(ratio of distance to diameter of target)

Battery type 1 x 9V
Environement 0 to 50 °C (32 to 122 °F)

0 to 95% RH non-condensing

Dimensions 143 x 80 x 38 mm (5.6x3.2x1.5”)
Weight 320 g (11.3 oz.)

1. Infrared sensor

2. Liquid Crystal Display (LCD)

3. ON/OFF and hold button

4. Wrist-strap