Input Protection:
INTRODUCTION
24V dc or 24V ac rms maximum input voltage on any combination of input
This instrument is a 5 digit, compact-sized portable digital thermometer de-
signed to use external K type and J type thermocouples. Temperature indica-
tion follows Reference Temperature/Voltage Tables (N.I.S.T. Monograph 175
Revised to ITS-90) for K-type and J-type thermocouples. One K-type thermo-
couple is supplied with the thermometer.
pins.
Maximum Differential Common Mode Voltage (Maximum Voltage T1
during measurement): 1volt.
Reading Rate: 1 sample/second.
SAFETY INFORMATION
OPERATING INSTRUCTIONS
It is recommended that you read the safety and operation instructions before
using the thermometer.
OPERATING INSTRUCTIONS
1.
Power Switch
The
key turns the thermometer on or off. In the SET mode the unit can-
MODEL HH803U
WARNING
not be powered off. Exit SET mode to power off.
To avoid electrical shock, do not use this instrument when working voltages
at the measurement surface over 24V AC or DC.
P
SINGLE IN UT K/J
APO function mode
DIGITAL THERMOMETER
Press
power key for more than 6 seconds to disable the auto power off
function. The display will show “APO OFF”.
WARNING
To avoid damage or burns, do not make temperature measurement in mi-
crowave ovens.
2. °C/°F Selecting the Temperature Scale
Readings are displayed in either degrees Celsius(°C) or degrees Fahren-
heit(°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. To change
the temperature scale, press the °C/°F key.
CAUTION
Repeated sharp flexing can break the thermocouple leads. To prolong lead
life, avoid sharp bends in the leads, especially near the connector.
3.
Button (only Main display)
Press this key to enter the Data Hold mode, the “HOLD” annunciator is dis-
played. When HOLD mode is selected, the thermometer holds the present
®
HH803U
Input Connector:
Accepts standard miniature thermocouple connectors (flat blades spaced
7.9mm, center to center).
readings and stops all further measurements. Press the
cancel HOLD mode and resume measurement. In the MIN/MAX recording
key again to
mode, press
key to stop recording. Press
key again to resume
ENVIRONMENTAL
cording. (Previously recorded readings are not erased).
Ambient Operating Ranges:
Backlight function mode
0°C to 50°C (32°F to 122°F) <70% R.H.
Storage Temperature:
-20°C to 60°C (-4°F to 140°F) <80% R.H.
Press the
button for more than two seconds to turn on the backlight
Press the button again for more than two seconds to turn off the backlight
The backlight will switch-off automatically after 30 seconds.
4. Cold Junction Temperature Display mode (second display)
Press C.J. TEMP key to display the thermocouple input connector cold
junction temperature on the second display. Press C.J. TEMP key again to
exit this mode.
GENERAL
Display: 5 digit liquid crystal display (LCD).
Overload: “----.-“ or “OL” is display.
5. K/J Input Type Selection
Battery: 1.5V x 4 PCS (AAA SIZE) UM-4 R03.
Battery Life: 200 hours typical with carbon zinc battery.
Auto power off: 30 minutes
Dimensions: 160mm(H) x 83mm(W) x 38mm(D)
Weight: Approx. 270g including batteries.
The K/J key selects the thermocouple type. When the thermometer is turned
on, it is set to the type selected when the thermometer was last turned off.
6. MIN MAX with Elapsed Time Mode
Press MIN MAX key to enter the MIN MAX Recording mode, (displays the
Maximum reading with time, Minimum reading with time and Average
reading stored in record mode). In the this mode the automatic power-off
Supplied Thermocouples (1 per input):
feature is disabled and
key, °C/°F key, REL key, SET key, Hi/Lo Limits
1 meter (40”) type K insulated beaded wire thermocouple. Maximum insula-
tion temperature is 482°C (900°F). Thermocouple accuracy is 1.1°C or 0.4%
of reading (whichever is greater) from 0°C to 1250°C.
key, K/J, C.J. TEMP and Recall keys are disabled. The beeper emits a tone
when a new minimum or maximum value is recorded. The current tem-
perature reading displayed on second display. Push the MIN MAX key to
cycle through the MAX, MIN and AVG readings. If an overload is re-
corded, the averaging function is stopped. In this mode, press the HOLD
key to stop the recording of readings, all values are held, press again to re-
start recording.
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable.
To prevent accidental loss of MIN, MAX and AVG data, this mode can
only be cancelled by pressing and holding the MIN MAX key for 2 seconds.
All recorded readings are erased.
Measurement Range:
J-TYPE -200°C to 1050°C, (-328°F to 1922°F)
K-TYPE -200°C to 1370°C, (-328°F to 2498°F)
Resolution: 0.1°C or 0.2°F
7. REL Relative mode
Press the REL key to enter the Relative mode, zero the display, and store
the displayed Reading as a reference value. The REL annunciator is dis-
played. The current temperature reading displayed on the second display
Press REL key again to exit the relative mode. The relative value can also
be entered by the user. (See "SET mode" later in this manual.) When the de-
sired Relative value has been entered, press REL key to enter the Relative
mode, press SET key use the set Relative value as a reference value. Press
REL key again to exit the relative mode. In the Relative mode, the val
(can not > 3000.0 counts) shown on the LCD is always the difference be-
Accuracy: Accuracy is specified for operating temperatures over the range of
18°C to 28°C (64°F to 82°F), for 1 year, not including thermocouple error.
(0.05% rdg + 0.3°C) -50°C to 1370°C
MADE IN TAIWAN
(0.05% rdg + 0.7°C) -50°C to -200°C
(0.05% rdg + 0.6°F) -58°F to 2498°F
(0.05% rdg + 1.4°F) -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).
tween the stored reference and the present readin
g.
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