Hanna Instruments HI 92840 User manual

These Instruments are in Compliance with the CE Directives
Instruction Manual
HI 92710 / HI 92740
HI 92810 / HI 92840
Portable Microprocessor
Printing and Logging
Thermometers

DearCustomer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
beforeusingtheinstrument.
Thismanualwillprovideyouwithalltheneces-
sary information for the correct use of the
instrument,aswellasamorepreciseideaofits
versatilityinawiderangeofapplications.
These instruments are in compliance with the
directives.
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTSTABLE OF CONTENTS
TABLE OF CONTENTS
Preliminary Examination............................. 1
General Description .................................... 1
LCD Display Functional Description ........... 2
Functional Description HI 92710
and HI 92740 .............................................. 3
Functional Description HI 92810
and HI 92840 .............................................. 4
Specifications ............................................. 5
Initial Preparation........................................ 6
Operational Guide....................................... 8
Printing / Recording with HI 92710
and HI 92740 ............................................ 13
Printing / Logging with HI 92810
and HI 92840 ............................................ 15
Data Transfer to PC.................................. 27
Fault Functions ........................................ 28
Memory Organization ............................... 29
Printer Maintenance.................................. 30
Battery Replacement ................................ 32
Calibration................................................. 34
Temperature Probes.................................. 35
Un-Housed NTC Sensors ......................... 37
Accessories .............................................. 39
Warranty ................................................... 40
CE Declaration of Conformity ................... 41
ISO 9000 Certified
Company since 1992

1
PRELIMINARY EXAMINATION
Remove the instrument from the packing ma-
terial and examine it carefully to make sure
that no damage has occurred during ship-
ping. If there is any damage, notify your
Dealer.
In addition to this instruction manual you will
also find:
•Printing Thermometer
•HI 762BL Temperature Probe (one chan-
nel version only)
•Paper Rolls (5 pcs)
•AA size Batteries (4 pcs)
•Rugged Carrying Case
Note: Save all packing material until you are
sure that the instrument functions cor-
rectly. All defective items must be re-
turned in its original packaging together
with the supplied accessories.
The Hanna Instruments portable thermom-
eters with built-in printers are microproces-
sor-based and enable you to accurately mea-
sure temperature and record data.
The instrument housing is made of rugged
and lightweight material.
Equipped with a large, easy-to-read LCD, the
units feature an extended battery life and a
special design that enables results to be
obtained even in humid, wet or dusty condi-
tions.
Measurements can be performed with lab-
grade precision in the field as well as in the
laboratory without compromising accuracy. A
12VDC adapter can also be used to power
the unit for extended use.
GENERAL DESCRIPTION

2
HI92810 and HI92840 have a capacity of
16,000 individual temperature readings with
recording intervals selected by the user.
Using the HI9200 infrared transmitter, all the
recorded data can be fed to a PC for easy
reproduction, storage or elaboration without
the interference of cables and cords between
the meter and the receiver.
Other features include: on-board clock and
date, user-selectable recording/logging inter-
vals, automatic memorization of measured
values (HI92810 and HI92840 only), use of
pre-calibrated completely interchangeable
probes, printing on plain paper, automatic
shut-off capability, low battery warning and 2
year warranty.
Two versions are available:
HI 92710C, HI 92740C, HI 92810C and
HI 92840C perform temperature readings in
degrees Centigrade;
HI 92710F, HI 92740F, HI 92810F and
HI 92840F perform temperature readings in
degrees Fahrenheit.
LOG INTV LO BAT
TIME
DATE
°C
1
2
LCD DISPLAY FUNCTIONAL DESCRIPTION
1) PrimaryDisplay
2) SecondaryDisplay

3
FUNCTIONAL DESCRIPTION
HI92710 AND HI92740
1) Temperature Probe Connectors
2) Power adapter plug
3) LCDDisplay
4) PAPER key, to pull the paper
5) ON/OFF key, to turn the meter on or off
6) INTV key, to select the printing interval
7) 0.1/1 key, to select the resolution
8) UP key, to set up printing interval and to select
channel # (for HI92740 only)
9) DOWN key, to set up printing interval and to select
channel # (for HI92740 only)
10) PRINT key, to obtain a printout (printing accumula-
tive time and temperature)
11) LOG key, to enter and exit the recording mode
HI 92740C
ON/OFF PAPER
INTV
instrum nts
e
UP
PRINT
DOWN
0.1/1 LOG
3
4
5
6
7
8
9
10
11
MICROPROCESSOR
PRINTING THERMOMETER
RANGE
-50.0 . . . +150.0°C
1
2
°C

4
FUNCTIONAL DESCRIPTION
HI 92810 AND HI 92840
1) Temperature Probe Connectors
2) Power adapter plug
3) LCDDisplay
4) PAPER key, to pull the paper
5) PRINTkey,toobtainaprintout(printingpresenttime
and temperature)
6) ALT key, alternate function key
7) TEMPkey,toreadtemperatureandtoreactivatethe
meter when in stand-by
8) UP key, to set up date, time, printing interval and to
select channel # (for HI92840 only)
9) DOWNkey,tosetupdate,time,printingintervaland
to select channel # (for HI92840 only)
10) TIME key, to display present time and printing
interval
11) LOGkey,toenterandexittheloggingandrecording
mode.
HI 92840C
PRINT
PAPER
ALT
instrum nts
e
UP
TIME
DOWN
TEMP LOG
3
4
5
6
7
8
9
10
11
MICROPROCESSOR
LOGGING THERMOMETER
RANGE
-50.0 . . . +150.0°C
1
2
°C

5
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
HI92710C/HI92810C HI92710F/HI92810F
HI92740C/HI92840C HI92740F/HI92840F
Range -50.0 to 150.0°C -55.0 to 300.0°F
Resolution 0.1°C0.1°F
Accuracy From -20 to +120°C: From -4 to +248°F:
(@25°C/77°F) ±0.4°C ±0.8°F
Outside: ±0.7°C Outside: ±1.3°F
for one year, excluding probe error
Typical EMC ±0.6°C ±1.2°F
Deviation
Battery 4x1.5V AA size, life of 500 hours
Type/Life with 60' printing interval
Socket for 12VDC adapter
Auto Shut-off After 5 minutes of non-use
Channels HI92710/HI92810:1;HI92740/HI92840:4
Printer Low-power impact belt type,
14 characters per line using
38 mm plain paper
Printing 1, 2, 5, 10, 15, 30, 60,
Intervals 120 and 180 minutes
Environment 0 to 50 °C (32 to 122°F)
Max. 95% RH
Dimensions 220x82x66mm (8.7x3.2x2.6")
Shipping Instrument: 500g (18 oz.)
Weight Kit: 1.4 kg (3.1 lb.)

6
INITIAL PREPARATIONINITIAL PREPARATION
INITIAL PREPARATIONINITIAL PREPARATION
INITIAL PREPARATION
Each meter is supplied complete with batter-
ies. Remove the back cover, unwrap the bat-
teries and install them while paying attention
to the polarity.
To prepare the instrument for use, connect
the temperature probe to the connector lo-
cated on the top of the instrument.
To switch the HI 92710 and the HI 92740
"ON", press the ON/OFF key.
To switch the HI 92810 and the HI 92840
"ON" press the TEMP key.
Choose the most appropriate temperature
probe(s) for your application (see page 35)
and connect it (them) to the meter.
All the probes have been precalibrated at the
factory and no calibration is needed.
HI 92710 and HI 92810 have a single probe
connector.
HI 92740 and HI 92840 have four probe con-
nectors.
With the meter facing you, channel #1 is the
first connector on the top left hand side.
TEMP
ON/OFF

7
If the temperature probe or a calibration test
plugs is not connected to the channel input,
the meter will display and print "----" to alert
the user.
This also indicates the possibility of a broken
probe cable. The channel is displayed with
"CH" and the number of channel (four chan-
nels versions only).
Note: To ensure accurate readings it is rec-
ommended that the temperature probes
be connected to consecutive channels
beginning with channel #1. For ex-
ample, if only one probe is to be used,
it must be connected to channel #1. If
2, 3 or 4 probes are to be used, they
must be connected to channels 1, 2,
3, and 4 in ascending order.
To maximize battery life, the display is auto-
matically switched off after 5 minutes of non-
use. However, the meter will continue to monitor
temperature (if in the logging mode) .
CH
°C

8
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDEOPERATIONAL GUIDE
OPERATIONAL GUIDE
SETTING THE PRINTING INTERVAL (for
HI92710 and HI92740 only)
Turn the instrument on by
pressing the ON/OFF key.
Press the INTV and the UP or DOWN keys
simultaneously.
The display will show the
log number. At the bottom
of the display the printing
interval will be flashing.
Keep the INTV key pressed and set the print-
ing interval by pressing the UP or DOWN
key. Select between 1, 2, 5, 10, 15, 30, 60,
120 and 180 minutes.
SETTING THE MEASUREMENT RESOLU-
TION (for HI92710 and HI92740 only)
Press the 0.1/1 key to select the 0.1°or 1°
resolution.
With four channels versions, all four channels
readings automatically change by pressing
this key.
To return the reading to the previous resolu-
tion, simply press the 0.1/1 key.
ON/OFF
CH
°C
0.1/1
DOWN
INTV
UP
OR
INTV