Omega HH81A User manual

©
Instruction
HH81A,
HH82A
C
€
Manual
Digital
Thermometers
Thank you for purchasing this instrument.
For
proper
use,
please
read
through
this
instruction
manual
prior
to
operation.
M3599/0600
Made in Japan
Shop online at | 0omega.com”
This
instruction
manual
describes
the
Model
HH82A,
which
has
more
functions
than
the
Model
HH81A.
However,
with
the
exception
of
the
CEW
key,
operation
of
the
Model
HH81A
is
performed
in
the
same
way.
1. Cautionary Notes for Safe Use of the Product
E
The
following
safety
symbols
are
used
on
this
instrument
and
instruction
manual
to
ensure
safe
use.
WARNING
This
symbol
found
on
the
back
of
the
instrument,
calls
attention
to
a
potential
danger or hazard capable of resulting in a serious injury or Joss of life, and the
operator must refer to this instruction manual to avoid the danger or hazard.
A
WARNING:
This
symbol
in
this
manual
indicates
a
potential
danger
or
hazard
capable
of
resulting
in
a
serious
injury
or
loss of
life.
A
CAUTION:
This
symbol
in
this
manual
indicates
a
potential
danger
or
hazard
capable
of
resulting
in
severe
but
not
irreversible
injury
or
damage.
In
some
instances.
the
hazards
may
be
those
associated
with
WARNING
symbols
but
are
of
significantly
less
magnitude.
A
NOTE:
This
symbol
draws
attention
to
information
that
is
essential
for
understanding
how
to
operate
the
instrument
and/or
instrument
features.
TIP:
Gives
information
that
complements
the
present
topic.
To
avoid
accidents,
such
as an
electrical
shock,
which
may
lead
to
injury
or
loss
of
life
to
the
operator,
or
damage
to
the
equipment,
be
sure
to
observe
the
following
precautions.
À WARNING
*
Do
not
use
the
instrument
to
measure
where
there
is
the
risk
of
electrical
shock.
Also,
when
using
the
2-
channel
model,
always
keep
the probe-to-probe
potential
below
1
V.
*
When
handling
a
needle-type
probe,
be
careful
not
to
point
the
tip
in
the
direction
of
any
person
as
doing
so
may
result
in
an
injury.
e
—
After
measuring
anything
with
a
high
temperature,
do
not
touch
the
metal
part
of
the
measuring
probe
as
this
may
result
in
a
burn.
Z\ CAUTION
*
When
the
instrument
is
stored
for
a
long
period
of
time.
be
sure
to
remove
the
batteries.
Not
doing
so
may
tesult
in
a
failure
or
malfunctioning
of
the
instrument
due
to
a
leakage
in
battery
liquid.
*
Do
not
use
deteriorated
or
damaged
probes,
as
doing
so
will
effect
the
Precision
of
measurements.
*
Before
you
detach
the
probe
from
the
instrument,
always
remove
the
probe
from
the
object
being
measured.
*
When
using
a
needle-type
probe,
do
not
insert
the
metal
part
of
the
measuring
probe
more
than
half
its
length
into
the
object
to
be
measured,
as
doing
so
may
result
in
a
burn
or
damage
to
the
probe
due
to
the
handle
of
the
probe
heating
up.
*
Keep
the
handle
of
the
probe
and
the
cable
that
connects
the
probe
to
the
instrument
within
a
temperature
range
of
-20°C
to
50°C,
as
they
are
less
resistant
to
heat
than
the
metal
part
of
the
measuring
probe.
E Regarding Disassembling and Modification
Do
not
disassemble
or
modify
the
instrument
in
any
way.
The
instrument
should
only
be
disassembled
by
a
service engineer of omega.com.

2. Functional Description
fT Display Maan ininum ‘Gare
Data hold status a - Ato power-off status
va Displayed when max. or _
min. value is shown.
Displayed when stored ._
data is shown.
Displayed in simplified
‘correction mode.
Selected channel = -
Data hold key
Resolution select key
: Power ON/OFF key
Maximum and minimum
value record key
Data record key
Thermocouple type select key (Type K//E/T)
Maximum, minimum,
Input channel select key
and stored data read key
Relative display select key d }
Simplitied correction mode key Cae
Data call-up key
Key Operation and description Display
Using the | To users who use Fahrenheit as the temperature unit:
unit °F To use the unit “F, follow the instructions below. °F
POWER)ser | When turning on the power, keep the @owemser key held down.
¢ Verity that the display shows the °F symbol, and then release the key
* After completing this step. you can switch between “C and °F
whenever you set the type of thermocouple.
+ By following the same procedure as above, you can revert to the
condition in which onty the unit °C ts available.
Power on | @ Press this key to turn on the power. After the power
+ The auto power-off function turns off the power automatically about 10
minutes after the last key operation of any key other than the Goweh)eer
key.
* To disable the auto power-off function, simultaneously press the
Commer key and arara key. With this function disabled, the
has been turned
on. all the
elements of the
display light up.
i
SET
Power off instrument will stay powered continuously. AUTO OFF
(POWER)ser @ To turn off the power, press this key for 1 second or longer.
Select To select a thermocouple type from K, J, E, and T:
thermo- If the power is already turned on, turn it off.
couple type
@ Press and hold down the key while pressing the @owtaser key K, J, E,T
to turn on the power. The thermocouple type and unit on the display
flash, indicating that the instrument is ready for changing thermocouple
type.
E Every time the key is pressed the thermocouple type and unit
(°C/°F) changes.
@ Press the Goweeer key to accept the setting.
TIP: The factory-set default is type K.

To read maximum and minimum values and stored data
maximum | values from memory:
and minimum | E When the (aeao) key is pressed, the display changes
values in the sequence shown in the figure on the right.
Read E For stored data, select the memory number using the
stored data
or (¥) key. After the memory number has been
isplayed for a few seconds, the value stored in that
memory is displayed.
NOTE:
e This data reading is disabled during thermo-
couple type selecting or correction value setting.
+ If you press the (Read) key when the REL mode
is active, each of the MIN, MAX and MEM
values is shown as a relative value based on the
reference value (D1).
© The number of display digits of maximum and minimum/stored
data depends on the current resolution setting, not the number of
display digits at the time when the data was measured.
Channel switching and display when data is being read (TX10-
03 only):
E Data while measuring values from a single channel (either channel A or B)
Using the key, display the channel used when the data was
measured. All of the maximum, minimum, and stored data values can
be displayed.
E Data when measuring the difference between values of two channels
(channel A and B measurement)
Pressing the key to select channel A or B shows the minimum
and maximum values, as well as the memory value, measured on that
channel.
Pressing the key to select ‘chA-chB' displays the stored values
of the difference between channels A and B as well as the maximum or
minimum difference values.
When the probe is not connected to the input connector (or the sensor
opens), a burnout mark is displayed.
For the 2-channel mode, the burnout mark is displayed when the probe is
not connected to the selected channel (channel A and B, or channel A-B)
Burnout
To clear the recording memory:
DO
@ Press the (READ) key to display stored data.
@ Select the memory number you wish to clear.
E Press the key to clear the data.
To clear all the stored data in the memory at one time, press and hold
the key for 1 to 2 seconds.
TIP: This operation does not affect the maximum and minimum values.

Select
channel
CEND
(HH82A
oniy)
Hold
QUA HOD
Release hold
ATA HOLD)
Select
resolution
Relative
display
REL sAD
Cancel
relative
display
To
select
the
input
channel
from
channel
A,
B,
or
A-B:
@
Press
this
key.
With
each
press,
the
display
changes
between
A,
B,
and
A-B,
allowing
you
to
select
the
input
channel
for
measurement.
Ay
NOTE:
*
Channel
switching
is
disabled
during
the
RCD
mode.
*
By
switching
the
channels
when
data
is
being
tead,
you
can
display
the
data
of
each
channel:
maximum
and
minimum
values
and
measured
data
saved
using
the
Memory-in
function.
Use this key to hold the measured value on LCD.
W To hold, press this key.
E To cancel holding, press this key again.
To select a display resolution:
B Press this key.
Every time this key is pressed, the display resolution alternates
between
0.1°C
and
1°C
(within
the
range
of
-200.0°C
to
199.9°C).
If
0.1°C
is
selected,
a
resolution
of
0.1°C
is
achieved
when
the
display
value
is
199.9°C
or
below;
when
it
goes
over
200°C,
the
resolution
changes
to
1°C,
and
the
number
of
display
digits
is
switched
automati-
cally.
When
“chA-B™
is
selected,
the
display
is
switched
to
the
input
value
of
channel
A
or
B,
whichever
is
greater.
TIP:
*
The
resolution
setting
is
maintained
even
after
the
power
is
turned
off.
The
next
time
the
power
is
turned
on,
the
instrument
starts
up
with
the
setting
that
was
set
before
the
power
was
turned
off.
* Factory-set resolution is 0. 1°C.
To select relative display:
@ Press this key to select a relative display.
The
display
shows
the
difference
(relative
value)
of
a
subsequent
measured
value
(Dx)
from
the
reading
given
as
a
reference
value
(D1)
when
this
key
was
pressed.
Relative display value = Dx-D1
The
reference
value
affects
measurements
on
all
channels
(channel
A,
channel
B
and
channel
A-B).
Any
value
among
MAX,
MIN
and
MEM
can
also
be
used
as
the
reference
value.
B To cancel relative display, press this key again.
REL
Set
correction
value
REL/ADJ
@®
POWER)SET
To set the correction value for simplified correction:
The
current
temperature
reading
can
be
corrected
to
a
value
based
on
the
reference
thermometer.
By
thus
eliminating
probe-specific
errors,
you
can
take
precision
measurements
over
a
frequently
used
temperature
range
As
NOTE:
When
you
change
the
measurement
probe,
the
correction
value
must
be
set
again
regardless
of
the
thermocouple
type.
E Press and hold this key for 3 seconds.
The
ADJ
on
the
display
flashes,
indicating
that
the
instrument
ts
ready
for
setting.
@
While
measuring
the
reference
temperature,
correct
the
display
value
to
an
optional
value
using
the
@
and
(Q)
keys.
(The
correction
range
is
+20°C
of
the
measured
value’
Resolution
of
the
correction
value
is
determined
according
to
the
resolution
setting.)
TIP:
Holding
down
the
®
or
(P)
key
increases
the
speed
with
which
the
display
value
changes.
@ Press the Comer key to accept the setting.
ADJ flashes.

Simplified | Use this key to enter and exit the simplified correction mode:
correction
mode
RELAI M To enier, press this key for | tu 2 seconds.
ADJ
Cancel
simplified
correction
mode
f
E To exit, press this key for | to 2 seconds again.
Recording of the maximum and minimum values:
maximum | Detection and recording of the max./min. values starts when this key is
and minimum | Pressed and continues until this key is pressed again or the power is
values tumed off.
@ To start recording, press this key.
AX NOTE: Enable the RCD mode after selecting the channel.
@ To stop the recording, press this key again.
e Measurement on channel A-B is done as described below.
Press the (ReaD) key to read the minimum and maximum values. With
the CoR) key, select channel A or B. The display shows the MIN
and MAX values for each channel.
i
Cancel
recording
i
{Start of MIN/MAX recording) {End of MIN/MAX recording)
A&A NOTE:
* The maximum and minimum values are stored in internal memory
even after recording is cancelled. The data will be updated when
the RCD mode is enabled again.
+ 1f you enable the RCD mode when the REL mode is active, the
reading changes to a relative value. Nevertheless, the minimum and
maximum of measured values (Dx) are stored in internal memory.
e Recorded maximum and minimum values can be referenced even
after the power is turned off and on again because they are stored
in memory antil the ROD mode ts enabled next time.
* Auto power-off is cancelled during the RCD mode.
Memory-in | To store data in internal memory (maximum of 10 data items):
(GATA HOLD) E Press the GHD key to hold the measured value. HOLD
RECORD ) | W Press the key.
The display automatically shows the smallest memory number under
which no data has been recorded. At this point, the MEM symbol turns
(a) (v) on to indicate that the thermometer is in the “Memory-in” mode.
B Use these keys to select a desired memory number under which yor want
1 to record data. In this step, you can also check the existing data value.
TIP: Pressing the @aana key while a memory number is being
displayed cancels the memory-in function (returns to measurement
mode).
@ Press the key to store the data.
TIP: The and (EM) symbols indicate that the value recorded
with the memory-in function ts being held and shown. Press the
Gaa noD key to return to normal measurement mode.

3. Measurement
This instrument can connect any of the 4 types of thermocouples: Type K, J, E, or T (it is set to Type K at shipment
from the factory). Use an OMEGA-type connector corresponding to the TC type for the probe.
(1) Load the batteries (see section 5, Battery Replacement).
(2) Press the Gowsiser key to turn on the power.
When the power has been tumed on, all indications on the display light up for about 2 seconds, then a measured
value appears.
(3) Check the thermocouple type.
If you wish to change the current setting, tum off the power and follow the instructions in the section Sctect
thermocouple type on the previous page.
(4) Select the Input channel. (HH82A only)
Press the (GH _) key and select one channel from channel A, B, and A-B (see Select channel on the previous
page).
(5) Connect the probe to the input connector.
If you are using the 2-channel model (HH82A), connect the probe(s) to the channel(s) you are using.
(6) When you have finished measurement, turn off the power by pressing the Gowen)cer key.
+ The power may be turned off by the auto power-off function during measurement. In this case, press the
key to restart the instrument and continue measurement.
* If the power is turned off and then on again, the instrument restarts with the same settings of the resolution
(0.1°C or 1°C), input channel (channel A, B or A-B) and thermocouple type (K, J, E or T) as before it was
tumed off.
(7) Other operations
For other operations such as display hold, relative display, and maximum and minimum record/readout, see the
key operation list on the previous page.
Ay NOTE
eS
Key operation of this instrument is comparatively easy. However, it is necessary to make sure that the instru-
ment is not mistakenly set to a state other than that intended. Note that, under normal measurement, “HOLD,”
“RCD,” “REL,” “MAX,” “MIN,” and “MEM” are not displayed.
4. Precautionary Notes
AS NOTE
¢ Each probe has its own maximum and minimum operating temperatures, so ensure that its temperature does
not fall outside the specified range.
* As the probe is susceptible to corrosion, do not use the instrument for the measurement of gas or liquid, and
refrain from measuring semi-solid particles and semi-viscous substances. After measurement, wipe the
probe with a dry cloth.
* Do not apply a strong force to the upper and lower parts of the probe as doing so may result in the bending
of the probe connector.
* When using the instrument be careful not to bend, drop, or strike the measurement probe.
¢ When measuring surface temperature using a surface-type probe, position the probe perpendicular to the
surface of the object. Also note that the application of oil to the probe for the means of providing better
contact can improve measurement accuracy.
° When measuring non-metallic surface temperature, make sure the measurement time is long enough to
compensate for poor thermal conductivity.
* To ensure stable measurement, the instrument should not be subjected to a sudden temperature change.
* This instrument, with the exception of the connector section, is water-resistant but not waterproof. There-
fore the instrument should not be immersed in water. If it is mistakenly immersed in water, remove it
immediately and check to ensure that no water has penetrated inside the case. Although this instrument is
designed so that any water penetrating into the connector does not permeate into the circuit inside the case,
try to prevent any water entering the connector. If water does enter the connector, the burnout display may
be unavailable.
5. Battery Replacement
When the batteries approach the end of their lives, the <_— =] mark appears on the display. If this mark is displayed,
teplace the batteries.
To replace the batteries:
(1) Remove the battery box cover from the back of the instrument. Then replace the two AA alkaline dry batteries
{LR6).
(2) Refit the cover to the battery box.
A\ NOTE
¢ When inserting batteries, be careful not to mistake the polarity as this can damage the instrument.
¢ When the instrument is to be stored for a long period of time, remove the batteries.

* Do not leave dead batteries in the instrument as doing so may result in a failure or malfunction of the
instrument due to a leakage in battery liquid.
* Both batteries should be replaced with new ones at the same time as replacing only one of the batteries may
tesult in the charge leaking from the new battery to the old.
6. Cleaning
< If the instrument becomes dirty, wipe the instrument with a cloth that has been dampened with water and well wrung.
< If the instrument is very dirty, use a cloth that has been dampened with a diluted neutral detergent. Do not use
other detergents, solvents, or chemicals. Doing so may cause a failure of the instrument.
+ Avoid any water or other liquids from splashing onto the connector, as this may cause a failure of the instrument.
7. Maintenance Service
For maintenance or repairs, contact OMEGA Engineering, Inc., Customer Service Dept. at 1-800-622-2378.
8. Specifications
Performance Specifications
Thermocouple type
Measurement channels
Measuring range
Measurement resolution
Accuracy (instrument)
Temperature coefficient
Measurement cycle
Operating environment
Storage environment
Power requirements
Battery life
General Functions
Display
Computing function
Battery alarm
Key operation sound
Auto power-off
Range hold function
Simple memory function
Drip-proof construction
Simplified correction function
Dimensions and Weight
External dimensions
Weight
Compliance with Standards
EMC standards
Emission immunity
Accessories
Instruction manual
K,J,E,T
Ich or 2ch (2ch, multi-function mode! only)
Type K: -200°C to 1372°C [-328°F to 2501 .6°F}
Type J: -200°C to 1000°C [-328°F to 1832°F]
Type E: -200°C to 700°C [-328°F to 1292°F]}
Type T: -200°C to 400°C [-328°F to 752°F]
-200.0°C to 199.9°C: 0.1°C or 1°C (when 1°C resolution is set)
200°C or higher: 1°C
-200.0°C to -100.1°C: 0.1% of rdg + 1.0°C
-100.0°C to 199.9°C: 0.1% of rdg + 0.7°C
200°C or higher, or when 1°C resolution is set: 0.2% of rdg + 1°C
+(0.015% of rdg +0.06°C)/°C
Approx. | second (Ich model; 2ch model when performing Ich measurement)
Approx. 2 seconds (2ch model when performing 2ch measurement; with no
range switching)
0°C to 50°C, 20 to 80% RH (no condensation)
-10°C to 60°C, 5 to 95% RH (no condensation)
Two AA alkaline dry batteries (LR6)
Approx. 450 hours
Reflective LCD; 7-segment, 4-digit display and 30 character segments
MAX/MIN, REL
Difference between 2 channels (2ch model only)
Displayed on LCD
Internal buzzer sounds during key operation
Turns off the power 10 minutes after the last key operation (can be disabled)
Controls the range switching between -200.0°C to £99.9°C (0.1°C resolution),
and 200°C or higher (1°C resolution).
Stores up to 10 data items in memory. Displays memory number and stored data
value.
Protection Class IP-54
Based on the reference value entered manually
Approx. 151(H) x 56(W) x 33(D) mm (excluding protrusions)
Approx. 180 g (including batteries)
EMI (interference signal): EN55011;1998,
EN61326-1;1998+A1 (Class B, Group H)
EMS (immunity): EN50082-1;1997,
EN61326-1;1998+A1
The accuracy ratings of all ranges are the sum of the accuracy levels in standard
applications and the accuracy tolerances shown below, where the overall length
of cable, including the probe, is assumed to be shorter than 3 m.
Accuracy tolerance of all available ranges: +5% of span (Tested at 3 V/m and
for standard applications)
Two AA alkaline dry batteries (LR6)

9. Regarding This Manual
© The contents of this manual are subject to change without prior notice.
*
This
manual
is
intended
to
describe
the
functions
of
this
instrument,
not
to
guarantee
that
the
functions
are
suited to the particular purpose of the user. `
WARRANTY/DISCLAIMER
OMEGA
ENGINEERING,
INC,
warrants
this
unit
to
be
free
of
defects
in
materials
and
workmanship
for
a
period
of
13
months
from
date
of
purchase.
OMEGA’s
WARRANTY
adds an
additional
one
(1)
month
grace
period
to
the
normal
one
(1)
year
product
warranty
to
cover
handling
and
shipping
time.
This
ensures
that
OMEGA
's
customers
reccive
maximum
coverage
on
cach
product.
Uf the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issuc an
Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found
to
be
defective,
it
wilt
be
repaired
or
replaced
at
no
charge.
OMEGA’s
WARRANTY
docs
not
apply
to
defects
resulting
from
any
action
of
the
purchaser,
including
but
nut
limited
to
mishandling,
improper
interfacing,
operation
outside
of
design
limits,
improper repair, of unauthorized modification. This WARRANTY is VOID if the unit shows cvidence of having becn tampered
with or shows evidence of having been damaged as a result of excessive corrosion; or current, heal, moisture or vibration;
improper specification; misapplication; misuse or other operating conditions outside of OMEGA'S control. Componcats which
wear arc not warranted, including but not limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responstbil-
ity for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance
with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by
it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF
ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRAN-
TIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are
exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is
based. Jn no event shall OMEGA be tiable for consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under
10 CFR 21 (NRC), uscd in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should
any Product(s) be used in or with any nuclear installation of activity, medical application, used on humans, or misused in any
way, OMEGA assumes no responsibility as set forth in uur basic WARRANTY / DISCLAIMER language, and, additionally,
purchaser will indemnity OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of
the Product(s) in such a manner.
RETURN REQUESTS / INQUIRIES
Dircct all warranty and repair requests/inquirics to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO
OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER
SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence,
The purchaser is responsible fur shipping charges, freight, insurance and proper packaging to prevent breakage in transit.
FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA:
1, Purchase Order number under which the product was PURCHASED,
2. Model and serial number of the product under warranty, and
3. Repair instructions and/or specific problems relative to the product.
FOR NON- WARRANTY REPAIRS, consult OMEGA for current repair charges. Have the following information available
BEFORE contacting OMEGA:
L. Purchase Order number to cover the COST of the repair,
2. Model and serial aumber of the product, and
3. Repair instructions and/or specific problems relative to the product.
OMEGA 's policy ix 10 make running changes, not model changes, whenever an tprovement is possible, This affords our customers the fatest in
technology and caginecring.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2000 OMEGA ENGINEERING, INC. All rights reserved. This document may aot be copied, photocopied, reproduced, translated, oF
reduced to any cloctronic medium or machine-readable form, In whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.