Hanna Instruments HI 93551 User manual

Instruction Manual
HI93551 • HI93551N
HI93551R
HI93542 • HI93552
HI93552R
K J T - Thermometers
www.hannainst.com

2
TABLE OF CONTENTS
Preliminary Examination............................................................... 3
General Description ....................................................................... 3
Specifications of HI93551 and HI93551N ..................................... 4
Specifications of HI93542 and HI93552 ....................................... 6
Specifications of HI93551R and HI93552R................................... 8
Operational Guide ..................................................................... 10
Serial Port Communication ......................................................... 15
User Calibration ......................................................................... 16
Factory Recalibration .................................................................. 16
Battery Replacement .................................................................. 17
Accessories .................................................................................. 18
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Pleasereadthisinstructionmanualcarefullybeforeusingthisinstrument.
For more information about Hanna Instruments and our products, visit
www.hannainst.com or e-mail us at [email protected].
For technical support, contact your local Hanna Instruments Office or
e-mail us at [email protected].
WARRANTY
HI93551, HI93551N, HI93542, HI93552, HI93551R ans HI93552R
are guaranteed for two years against defects in workmanship and
materials when used for their intended purpose and maintained
according to instructions. Electrodes and probes are guaranteed for six
months. This warranty is limited to repair or replacement free of
charge. Damage due to accidents, misuse, tampering or lack of
prescribed maintenance is not covered. If service is required, contact
your local Hanna Instruments Office.
If under warranty, report the model number, date of purchase, serial
number and the nature of the problem. If the repair is not covered by
thewarranty,youwillbenotifiedofthechargesincurred.Iftheinstrument
is to be returned to Hanna Instruments, first obtain a Returned Goods
Authorization number from the Technical Service department and then
senditwithshippingcostsprepaid.Whenshippinganyinstrument,make
sure it is properly packed for complete protection.

3
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it
carefully to make sure that no damage has occurred during shipping.
If there is any damage, please contact your local Hanna Instruments
Office.PC
Each instrument is supplied with:
• 3 x 1.5V AA alkaline batteries
• Instruction manual.
Note: Save all packing material until you are sure that the
instrument functions correctly. All defective items must be
returned in the original packing with the supplied accessories.
GENERAL DESCRIPTION
These instruments are powerful and flexible thermometers, which can
take measurements using different types of thermocouple probes (K, J
and T), and have been designed using the latest microprocessor
technology to provide reliable and accurate high resolution measure-
ments in a wide temperature reange.
Standard features include dual-level LCD (which allows continuous
displaying of High and Low temperature values), °C/°F selection,
HOLD function, auto-off capability, remaining battery life indication,
low battery detection, long battery life and two-year warranty.
HI93542, HI93552 and HI93552R are two-channel thermometers,
ideal for monitoring two samples at once.
HI93551N, HI93551R, HI93552 and HI93552R offer additional
features, such as calibration of meter and probe at 0°C, backlit
display, and capability to store and recall a reading.
Moreover, the HI93551R and HI93552R models are equipped with a
serial port interface.
All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner, Hanna Instruments Inc.
Hanna Instruments reserves the right to modify the design, construction or
appearance of its products without advance notice.

4
SPECIFICATIONS OF
HI93551 & HI93551N
SPECIFICATIONS
Range (*) K -200.0 to 999.9°C / 1000 to 1371°C
-328.0 to 999.9°F / 1000 to 2500°F
J-200.0 to 999.9°C
-328.0 to 999.9°F / 1000 to 1832°F
T-200.0 to 400.0°C
-328.0 to 752.0°F
Resolution K 0.1°C (-149.9 to 999.9°C)
0.2°C (-200.0 to -150.0°C) / 1°C (1000 to 1371°C)
0.1°F (-24.9 to 999.9°F) / 0.2°F (-249.9 to -25.0°F)
0.3°F (-328.0 to -250.0°F) / 1°F (1000 to 2500°F)
J0.1°C (-200.0 to 999.9°C)
0.1°F (-149.9 to 999.9°F)
0.2°F (-328.0 to -150.0°F) / 1°F (1000 to 1832°F)
T0.1°C (-149.9 to 400.0°C)
0.2°C (-200.0 to -150.0°C)
0.1°F (0.0 to 752.0°F) / 0.2°F (-270.0 to -0.1°F)
0.3°F (-328.0 to -270.1°F)
Accuracy ±0.5°C (-100.0 to 999.9°C) / ±1°C (outside)
(@20°C/68°F) ±1°F (-148.0 to 999.9°F) / ±1.5°F (outside)
for one year, excluding probe error
Battery 3x1.5V AA (IEC LR6) batteries,
approx. 500 hours of continuous use
Auto-off user selectable: 60 min or disabled
Environment -10 to 60°C (14 to 140°F); RH 100%
Dimensions 150 x 80 x 36 mm (5.9 x 3.1 x 1.4")
Weight 235 g (8.3 oz.)
(*) Range may be limited by probe.

5
HI93551 HI93551N
Keyboard Functions:
ON/OFF : turn the meter ON and OFF.
HOLD : freeze the reading on display.
°C/°F : change reading unit (°C or °F).
KJT : select the thermocouple type.
CLR : clear the HI and LO values.
CAL (HI93551N only) : press and hold for about 5 seconds to
enter the Calibration mode (with reading within ±3°C
range); press to abort the Calibration mode.

6
SPECIFICATIONS OF
HI93542 & HI93552
SPECIFICATIONS
Range (*) K -200.0 to 999.9°C / 1000 to 1371°C
-328.0 to 999.9°F / 1000 to 2500°F
J-200.0 to 999.9°C
-328.0 to 999.9°F / 1000 to 1832°F
T-200.0 to 400.0°C
-328.0 to 752.0°F
Resolution K 0.1°C (-149.9 to 999.9°C)
0.2°C (-200.0 to -150.0°C) / 1°C (1000 to 1371°C)
0.1°F (-24.9 to 999.9°F) / 0.2°F (-249.9 to -25.0°F)
0.3°F (-328.0 to -250.0°F) / 1°F (1000 to 2500°F)
J0.1°C (-200.0 to 999.9°C)
0.1°F (-149.9 to 999.9°F)
0.2°F (-328.0 to -150.0°F) / 1°F (1000 to 1832°F)
T0.1°C (-149.9 to 400.0°C)
0.2°C (-200.0 to -150.0°C)
0.1°F (0.0 to 752.0°F) / 0.2°F (-270.0 to -0.1°F)
0.3°F (-328.0 to -270.1°F)
Accuracy ±0.5°C (-100.0 to 999.9°C) / ±1°C (outside)
(@20°C/68°F) ±1°F (-148.0 to 999.9°F) / ±1.5°F (outside)
for one year, excluding probe error
Battery 3x1.5V AA (IEC LR6) batteries,
approx. 500 hours of continuous use (BL off)
Auto-off user selectable: 60 min or disabled (HI 93542)
user selectable: 8 min, 60 min, disabled (HI 93552)
Environment -10 to 60°C (14 to 140°F); RH 100%
Dimensions 150 x 80 x 36 mm (5.9 x 3.1 x 1.4")
Weight 235 g (8.3 oz.)
(*) Range may be limited by probe.

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HI93542 HI93552
Keyboard Functions:
ON/OFF : turn the meter ON and OFF.
T1/T2 : select the reading channel (T1, T2 or T1-T2).
HOLD : freeze the reading on display. In HI93552, the frozen value
is also stored in non-volatile memory.
CLR : clear the HI and LO values, reset the relative or average
measurement.
DISP : select Normal, Relative, Average or T1/T2 measuring mode.
KJT : select the thermocouple type.
ALT (HI93552 only) : enable the second function keys; the "ALT" tag
turns on to indicate that the second functions are enabled.
Note: The ALT key can be released before pressing the second
function key for 1-hand operation.
ALT/uCAL : press and hold for about 5 seconds to enter the
Calibration mode (with reading within ±3°C range).
(ALT +) AOFF : set auto-off delay (8min, 60min, disabled).
(ALT +) °C/°F : change reading units (°C or °F).
(ALT +) MR : recall memorized value.
(ALT +) KJT : select the thermocouple type.
(ALT +) BL : toggle the backlight ON and OFF.

8
SPECIFICATIONS OF
HI93551R & HI93552R
SPECIFICATIONS
Range (*) K -200.0 to 999.9°C / 1000 to 1371°C
-328.0 to 999.9°F / 1000 to 2500°F
J-200.0 to 999.9°C
-328.0 to 999.9°F / 1000 to 1832°F
T-200.0 to 400.0°C
-328.0 to 752.0°F
Resolution K 0.1°C (-149.9 to 999.9°C)
0.2°C (-200.0 to -150.0°C) / 1°C (1000 to 1371°C)
0.1°F (-24.9 to 999.9°F) / 0.2°F (-249.9 to -25.0°F)
0.3°F (-328.0 to -250.0°F) / 1°F (1000 to 2500°F)
J0.1°C (-200.0 to 999.9°C)
0.1°F (-149.9 to 999.9°F)
0.2°F (-328.0 to -150.0°F) / 1°F (1000 to 1832°F)
T0.1°C (-149.9 to 400.0°C)
0.2°C (-200.0 to -150.0°C)
0.1°F (0.0 to 752.0°F) / 0.2°F (-270.0 to -0.1°F)
0.3°F (-328.0 to -270.1°F)
Accuracy ±0.5°C (-100.0 to 999.9°C) / ±1°C (outside)
(@20°C/68°F) ±1°F (-148.0 to 999.9°F) / ±1.5°F (outside)
for one year, excluding probe error
Battery 3x1.5V AA (IEC LR6) batteries,
approx. 500 hours of continuous use (BL off)
Auto-off user selectable: 8 min, 60 min, disabled
Serial Port unidirectional, 8-bit data, 1200 baud
Communication (see "Serial Communication" section)
Environment -10 to 60°C (14 to 140°F); RH 100%
Dimensions 150 x 80 x 36 mm (5.9 x 3.1 x 1.4")
Weight 235 g (8.3 oz.)
(*) Range may be limited by probe.

9
HI93551R HI93552R
Keyboard Functions:
ON/OFF : turn the meter ON and OFF.
T1/T2 : select the reading channel (T1, T2 or T1-T2).
HOLD : freeze the reading on display. The frozen value is also stored
in non-volatile memory.
CLR : clear the HI and LO values, reset the relative or average
measurement.
DISP : select Normal, Relative, Average or T1/T2 measuring mode.
ALT : enable the second function keys; the "ALT" tag turns on to
indicate that the second functions are enabled.
Note: The ALT key can be released before pressing the second
function key for 1-hand operation.
ALT/uCAL : press and hold for about 5 seconds to enter the
Calibration mode (with reading within ±3°C range).
(ALT +) AOFF : set auto-off delay (8 min, 60 min, disabled).
(ALT +) °C/°F : change reading units (°C or °F).
(ALT +) MR : recall memorized value.
(ALT +) KJT : select the thermocouple type.
(ALT +) BL : toggle the backlight ON and OFF.

10
OPERATIONAL GUIDE
To switch the instrument ON, press the ON/OFF key.
The thermometer will carry out a self diagnostic test routine, the LCD will
show all segments for a few seconds (or as long as ON/OFF is held),
followed by the percentage indication of the remaining battery life.
The thermometer then enters normal measurement mode.
If a temperature probe is plugged in, the meter displays the
measured temperature.
If no probe is plugged in, or if the reading is
over-range, the display shows flashing dashes.
If a measurement is slightly over the range of
the meter specifications, the display will flash
the closest full-scale value.
To switch the meter OFF, press the ON/OFF key.
Note: The meters are provided with an acoustic signal feature activated
when buttons are pressed, which can be disabled using a switch
located in the battery compartment (see figure on page 10).
°C/°F SELECTION
Measurements can be displayed in either degrees Celsius or Fahren-
heit. The meter is factory set to °C scale; to change the scale, press
°C/°F key (HI93551, HI93551N and HI93551R) or (ALT+)°C/°F
keys (HI93552 and HI93552R), or set the switch located in the battery
compartment (HI93542, see figure on page 10).
THERMOCOUPLE TYPE SELECTION, KJT
By pressing KJT (HI93551, HI93551N and HI93542) or (ALT+)KJT
keys (HI93551R, HI93552 and HI93552R), the thermometer is set
according to the connected thermocouple type. The corresponding
symbol will be displayed, i.e. K for K-type, J for J-type, T for T-type.
Note: Changing thermocouple type resets the HI and LO values.