HH12C
DIGITAL THERMOMETER
Servicing North America:
U.S.A. Omega Engineering, Inc.
Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)
Customer Service: 1-800-622-2378 (USA & Canada only)
Engineering Service: 1-800-872-9436 (USA & Canada only)
Tel: (203) 359-1660 Fax: (203) 359-7700
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide
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.
INTRODUCTION
This instrument is a portable 4½ digit, compact-sized
digital thermometer designed to use external K-type
thermocouples as temperature sensor. Temperature
indication follows National Bureau of Standards and
IEC 584 temperature/voltage tables for K-type
thermocouples.
Two K-type thermocouple are
supplied with the thermometer.
SAFETY INFORMATION
It is recommended that you read the safety and
operation instructions before using this thermometer.
WARNING
To avoid electrical shock, do not use this
instrument when working voltages at the
measurement surface over 24V AC or 60V DC.
WARNING
To avoid damage or burns, do not make temperature
measurement in microwave ovens.
CAUTION
Repeated sharp flexing can break the thermocouple
leads. To prolong lead life, avoid sharp bends in the
leads, especially near the connector.
The
symbol on the instrument indicates that the
operator must refer to an explanation in this manual.
SPECIFICATIONS
ELECTRICAL
Temperature Scale:
Celsius or Fahrenheit user-selectable
Measurement Range:
-200°C to 1372°C, -328°F to 2501°F
Auto range:
0.1°C/1°C, 0.1°F/1°F
Accuracy:
Accuracy is specified for operating tempera-
tures over the range of 18°C to 28°C (64°F to 82°F), for
1 year, not including thermocouple error.
±(0.1%rdg+0.5°C) on -50°C to 1372°C
±(0.1%rdg+2°C) on -50°C to -200°C
±(0.1%rdg+1°F) on -58°F to 2501°F
±(0.1%rdg+4°F) on -58°F to -328°F
Temperature Coefficient:
0.1 times the applicable accuracy specification per °C
from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and
82°F to122°F).
Input Protection:
60V dc or 24V ac rms maximum input voltage on any
combination of input pins.
Input Connector:
Accepts standard miniature thermocouple connectors
(flat blades spaced 7.9mm, center to center).
ENVIRONMENTAL
Ambient Operating Ranges:
0°C to 50°C (32°F to 122°F) <80% R.H.
Storage Temperature:
-20°C to 60°C (-4°F to 140°F) <70% R.H.
GENERAL
Display:
4½ digit liquid crystal display (LCD) with max-
imum reading of 19999.
Low battery indication:
The “
” is displayed when the
battery voltage drops below the operating level.
Measurement rate:
1 time/second.
Operating environment:
0°C to 50°C at<70% R.H.
Storage temperature:
-20°C to 60°C, 0 to 80% R.H. with
battery removed from meter.
Accuracy:
Stated accuracy at 23°C±5°C, <75% R.H.
Battery:
Standard 9V battery (NEDA 1604, IEC 6F22).
Battery Life:
100 hours typical with carbon zinc battery.
Dimensions:
210mm(H) x 65mm(W) x 35mm(D).
Weight:
approx. 292g including battery.
Supplied Wire:
4 feet type “K” thermocouple bead wire
(
PTFE
tape insulated). Maximum insulation tempera-
ture 260°C (500°F). Wire accuracy ±2.2°C or ±0.75%
of reading (whichever is greater) from 0°C to 800°C.
OPERATING INSTRUCTIONS
1.
“°C/°F” Button: Selecting the Temperature Scale
Reading are displayed in either degrees Celsius(°C)
or
degrees Fahrenheit(°F). When the thermometer is
turned on, it is set to the temperature scale that was in
use when the thermometer was last turned off.
2.
Single-Thermocouple Temperature
Measure-
ment
The thermometer displays the temperature of the
thermocouple that is connected to the selected input.
Press the “T2” key to display the temperature of the
thermocouple connected to the T2 input. Press the “T1”
key to display the temperature of the thermocouple
connected to the T1 input. The input selection cursor
indicates which input is selected.
3.
T2 or Differential Temperature Measurement
T2 thermocouple or Differential temperature
measurement is selected by pressing the “T2/T1-T2”
key.
This causes the thermometer to display the
temperature
difference between the two thermocouples
(the temperature of thermocouple T1 minus the
temperature of
thermocouple T2). The selection is
indicated by the input selection cursor.
4.
“HOLD” Button
Press the “HOLD” key to enter the Data Hold mode,
the “HOLD” annunciator is displayed. When HOLD
mode is selected, the thermometer held the present
readings and stops all further measurements. Press the
“HOLD” key again cancels HOLD mode, causing the
thermometer to resume taking measurements.
5.
“REL” Button
Press “REL” key to enter Relative mode, zero the
display, and store the displayed reading as a reference
value and annunciator REL is displayed. Pressing
“REL” key over 2 seconds to exit the relative mode.
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INSTRUCTION
SHEET
M5604/0917
