Hanna Instruments hi 99556-00 User Manual

OPERATIONAL GUIDE

INFRARED SENSOR MEASUREMENT
Switch on the instrument and be sure
that it is in the IR (infrared) mode.

Note: If a “P” appears on the LCD, it means that the

thermometer is in the external probe mode. Press the
IR/CONTACT button to switch to IR (infrared) mea-
surement mode.

To obtain the temperature
of an object, simply aim
the sensor in the direction
of the object.

Reading Distance
The distance between the sensor and the object is an
important factor in infrared measurement.
The relation between “distance/object area” is 3:1. This
means that the diameter of the measured area is one third
of the distance between the sensor and the object.

For example, if the sensor is 15 cm away from the object,
the instrument measures the temperature of an area with a
5cm diameter.

BATTERY REPLACEMENT

Battery replacement must only take place in a non-hazard-
ous 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.

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
HI 765PWL Reinforced penetration thermistor probe

CE DECLARATION

OF CONFORMITY

IST99556R2

02/00

PRINTED IN PORTUGAL

Recommendations for Users
Before using these products, make sure that they are entirely suitable for the environ-
ment in which they are used.
Operation of these instruments in residential area could cause unacceptable interference
to radio and TV equipment, requiring the operator to take all necessary steps to correct
interferences.
Any variation introduced by the user to the supplied equipment may degrade the
instruments' EMC performance.
To avoid damage or burns, do not perform any measurement in microwave ovens.

EMISSIVITY
The instrument measures the temperature of objects contain-
ing 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 tape to compensate for the reflectivity.

WARNING
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.

EXTERNAL PROBE

Connect the temperature probe
HI 765PWL to the connector
on top of the instrument.

MEASUREMENT MODE
Press the IR/CONTACT button to select measurement mode.
“P” on the LCD indicates external probe.

Dip the probe in the substance which you intend to measure
(4cm immersion level is recommended) and wait for the
reading to stabilize.

OFF

CONT

ACT

WEAK BATTERY
HI 99556

HI 99556

HI 99556 continuously checks the battery status. If the
battery level is too low to guarantee the stated accuracy, it
shuts off the LCD completely. If the meter cannot be switch
on, or switches itself off after being switched on, replace the
battery.

HI 99556