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OMEGAETTE
®
HH306A
Thermometer/Data Logger

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FAX: (514) 856-6886
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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

CONTENTS
TITLE PAGE
I. Introduction
II. Specifications
III. Symbol Definition and Button Location
IV. Operation Instructions
4.1 Power-Up………………………………………………………………………………….... 3
4.2 Connection the Thermocouples………………………………………………………...
4.3 Selecting the Temperature Scale……………………………………………………….
4.4 Data-Hold Operation………………………………………………………………………
4.5 DataLogger…………………………………………………………………………………
4.6 Clock Setup ………………………………………………………………………………..
4.7 Recording Interval Setup……..………………………………………………………….
4.8 Time Operation…………………………………………………………………………….
4.9 MAX/MIN Operation……………………………………………………………………….
4.10 Auto Power Off……………………………………………………………………………
4.11 Low Battery Condition ………………………………………………………………….
4.12 Calibration Point…………………………………………………………………………
4.13 Digital Output……………………………………………………………………………..
V. Setup SE-305 (Thermo DataLogger)—RS232 interface
software
…………………………………………………………………………….….. 1
…………………………………………………………………………… 1
………………………………. 2
…………………………………………….……………… 3
3
3
3
3
4
4
4
4
4
5
……………………………………………………………………………………… 7
3
4

HH306A
I. Introduction:
This instrument is a digital thermometer for use with any K-type thermocouple as temperature
sensor. Temperature indication follows National Bureau of Standards and IEC584
temperature/voltage table for K-type thermocouples. Its internal memory can keep up to 16312
records.(note1.) It uses RS232 interface to perform bi-directional communication with PC.
II. Specifications:
Numerical Display: 4 digital Liquid Crystal Display
Measurement Range: -200°C ~ 1370°C ; -328°F ~ 2498°F
Resolution: -200°C~ 200°C 0.1°C; 200°C ~1370°C 1°C
Input Protection at Thermocouple Input: 60V DC, or 24Vrms AC
Environmental:
R Operating Temperature and Humidity: 0°C ~50°C (32°F ~ 122°F); 0 ~ 80% RH
R Storage Temperature and Humidity: -10°C to 60°C (14°F ~ 140°F); 0 ~ 80% RH
R Altitude up to 2000 meters.
Accuracy: at ( 23 ± 5°C )
-200°C ~ 200°C ±(0.2% reading + 1°C)
200°C ~ 400°C ±(0.5% reading + 1°C)
400°C~1370°C ±(0.2% reading + 1°C)
-328°F ~ -200°F ±(0.5% reading + 2°F)
-200°F ~ 200°F ±(0.2% reading + 2°F)
200°F ~ 2498°F ±(0.3% reading + 2°F)
The basic accuracy Specification does not include the error of the probe. Please refer to the
probe accuracy specification for additional details.
Sample Rate: 1.25 times per second
Dimension: 184×64×30mm
Weight: 210g Approx.
Accessory: K Type Bead Probe, Battery, Carrying Case, Instruction Menu, Software program,
Power requirement: 9 Volt Battery
Battery Life: Approx. 100hrs with alkaline battery
AC Adapter: 9VDC ±15% 100mA
Plug Diameter: 3.5mm×1.35mm
Option : AC Adapter
-200°F~ 200°F 0.1°F; else 1°F
Range Accuracy
Temperature Coefficient:
For ambient temperatures from 0°C ~ 18°C and 28°C
~ 50°C, for each °C ambient below 18°C or above
28°C add the following tolerance into the accuracy
spec.
Note:
RS-232 & USB Connection Cable.
0.01% of reading + 0.03°C
( 0.01% of reading + 0.06°F )
note1:
Every time you press "REC" button to start recording data and press "REC" button again to stop
recording, there will be a data set in memory, you can store as many data sets as you want until memory
is full.
1

HH306A
III. Symbol Definition and Button Location:
: This indicates that the minus temperature is sensed.
°C°F
: Centigrade and Fahrenheit indication.
K
: Thermocouple Type Indication
MAX
: The Maximum value is now being displayed
MIN
: The Minimum value is now being displayed
: This indicates auto power off is enabled.
: This indicates that the display data is being held.
m-d
: it indicates the value below is month and day
h:m
: it indicates the value below is hour and minute
m:s
: it indicates the value below is minute and second
y
: it indicates year is displayed in the main window.
: The Battery is not sufficient for proper operation.
REC
: This indicates that the tester is recording. If it blinks, it indicates the memory is full.
2
2
3
4
5
6
SETUP
TIME
CLOCK
REC
200
RANGE:
328
POWER-UP OPTIONS
REC
C
F 2498
1
T1T
T1T2
7
8
HOLD
INTV
9
F
C
1370
C
F
10
L
A
C
T
U
P
T
U
O
V
9
C
D
9V BATTERY
NEDA 1604 6F22 006P
PLEASE READ
MANUAL FOR SAFETY
OPEN
2
Button Location:
1
K type temperature sensor T1 input
○
connector
2
K type temperature sensor T2 input
○
connector
3
○
LCD display
4
ON/OFF button
○
5
Time display button
○
6
Record button
○
7
MAX MIN function control button
○
8
HOLD button
○
9
°C, °F control button
○
10
Offset calibration screw
○
11
Digital output connector
○
12
AC power adapter connector
○
13
Tripod connector
○
14
○
Battery cabinet cover