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OPERATING INSTRUCTIONS
MODEL HH801B
DUAL INPUT J/K/T/E
DIGITAL THERMOMETER
MADE IN TAIWAN
FEATURES:
Highly accurate thermometer with 0.1% basic accuracy.
Three displays for easy observations.
Thermocouple offset adjustment.
Four thermocouple types K/J/T/E for common use.
Robust protective holster.
Auto-Power Off and Backlight functions.
MIN/MAX/AVG/REL/HOLD/ functions.
SAFETY INFORMATION
It is recommended that you read the safety and opera-
tion instructions before using the thermometer.
WARNING
To avoid electrical shock, do not use this instrument
when working voltages at the measurement surface
over 24V AC or 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 opera-
tor must refer to an explanation in this manual.
SPECIFICATIONS
ELECTRICAL
Temperature Scale: Celsius or Fahrenheit user-selectable
Measurement Range:
Thermocouple Range
K-TYPE(0.1°C) -200°C to 1372°C, -328°F to 1999°F
J-TYPE(0.1°C) -210°C to 1200°C, -346°F to 1999°F
T-TYPE(0.1°C) -200°C to 400°C, -328°F to 752°F
E-TYPE(0.1°C) -220°C to 1000°C, -364°F to 1832°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+1°C) on -60°C to 1372°C
±(0.1%rdg+2°C) on -60°C to -220°C
±(0.1%rdg+2°F) on -76°F to 1999°F
±(0.1%rdg+4°F) on -76°F to -364°F
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: 3_digit liquid crystal display (LCD) with a
maximum reading of 1999.
Polarity: Automatic, positive implied, negative polarity
indication.
Overrange: “OL” or “-OL” is displayed.
Zero: Automatic.
Low battery indication: The “
” is displayed when the
battery voltage drops below the operating level.
Measurement rate: 1 sample/second.
Accuracy: Stated accuracy at 23°C±5°C, <75% R.H.
Dimensions: 160mm (H) x 83mm (W) x 38mm(D).
Weight: approx. 265g including batteries.
OPERATING INSTRUCTIONS
1. “ ” Power Button
The “
” key turns the thermometer on or off. In the
MAX/MIN record mode the meter cannot be powered
off. With the power off, push and hold this key for more
than 4 seconds to disable auto power-off and turn the
meter on.
2. “HOLD” Button
Press the “HOLD” key to enter the Data Hold mode,
the “HOLD” annunciator is displayed. When HOLD
mode is selected, the thermometer holds the present
readings and stops all further measurements.
Press the “HOLD” key again to cancel HOLD mode
and allow the thermometer to resume taking measure-
ments. In the MAX/MIN recording mode, press the
“HOLD” key to stop the recording. Press “HOLD” key
again to resume recording. (Previously recorded read-
ings are not erased.)
3. ”
/°F” Button
Press “
” button to toggle ON or OFF the backlight.
The backlight will switch-off automatically after 30 sec-
onds. Readings are displayed in either degrees Celsius
(°C) or degrees Fahrenheit (°C). 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 “
/°F” button
for more than 2 seconds.
4. “REL” Button
Press the “REL” key to enter the Relative mode, zero
the display, and store the displayed reading as a refer-
ence value. The annunciator REL will appear on the
LCD. Press the “REL” key for more than 2 seconds to
exit the relative mode. The relative value can also be
entered by the user. (See “SET mode” later in this man-
ual). When the desired Relative value has been entered,
press the “SET” key to set Relative value as a reference
value. Press “REL” key again to exit the relative mode.
In the Relative mode, the value (can not be greater
than ±2,000 counts) shown on the LCD is always the
difference between the stored reference and the present
reading.
5. “Type” Button: K/J/T/E Thermocouple Type
The “TYPE” key selects the thermocouple type to be
used as an input. When the thermometer is turned on, it
is set to the type that was in use when the thermometer
was last turned off.
6. “MAX/MIN” Button: Record mode
Press “MAX/MIN” key to enter the MAX/MIN Re-
cording mode, (displays the Maximum reading, Mini-
mum reading, “MAX-MIN” reading and Average read-
ing stored in record mode). In this mode the automatic
power-off feature is disabled and “
” key and all func-
tion keys are disabled. The beeper emits a tone when a
new maximum or minimum value is recorded.
Push “MAX/MIN” key to cycle through the MAX,
MIN, MAX-MIN and AVG readings. If overload is re-
corded, the averaging function is stopped and average
value displays “-OL”. In this mode, press the “HOLD”
key to stop the recording of readings, all values are held,
press again to resume recording. To prevent accidental
loss of MAX, MIN, “MAX-MIN” and AVG data, this
mode can only be cancelled by pressing and holding the
MAX/MIN key for 2 seconds to exit and erase recorded
readings.
7. “Hi/Lo” Button: LIMITS mode
Press the “Hi/Lo” key to enter the Hi/Lo LIMITS
comparative mode, “LIMIT” is displayed. When the in-
put temperature value is above the Hi value, the beeper
emits a continuous tone and “Hi” is displayed. When in-
put temperature value is below the Lo value, the beeper
emits a pulsed tone and “Lo” is displayed. Press the
“Hi/Lo” LIMIT key again to exit the Hi/Lo LIMIT
mode.
8. “ ” Button
The ” ” key increases the value of the selected
digit.(See “SET mode” later in this manual.)
9. “TC OFFSET” Button
This button allows the user to adjust the Cold Junc-
tion Compensation offset up to ±5.0 counts. This value
is used to compensate for thermocouple sensor error.
When a value is entered, the readings displayed on the
LCD will be automatically adjusted to include this off-
set. (See “SET mode” later in this manual.)
10. “ ” Button
The “ ” key moves to the next digit on the display
(See “SET mode” later in this manual.)
11.“ ” Button
The “ ” key decreases the value of the selected digit
(See “SET mode” later in this manual.)
12. “SET” Button
Allows user to set the Relative value, Hi/Lo Limits
value and Cold Junction Compensation value. Press
“SET” key to enter SET mode. The LCD displays“SET”
and set annunciator is show in the upper right.
Set Relative value:
Press “SET” key to enter SET mode, then Press
“REL” button to set relative value. SET”, “REL” and
“T1” annunciators are displayed.
Press “_” or ” ”to increase or decrease the value of
the flashing digit, press “ ”to advance to the next digit
Use “_” or ” ”to set positive or negative for this rela-
tive value. Then press the ”ENTER” key to set the rela-
tive value for T1. Follow the same procedure for T2. In
this Relative SET mode, the value can not be greater
than ±1999.9 counts. If this value more than ±1999.9
counts, “Err” displayed and a valid offset must be en-
tered.
Set Hi/Lo Limit value:
Press “SET” key to enter SET mode, then Press Hi/Lo
button to set Hi/Lo Limit value. “SET”, “LIMIT”, “Hi”
and “T1” annunciator are displayed.
Press “_” or ” ”to increase or decrease the value of
the flashing digit, press “ ”to advance to the next digit
Use “ ” or ” ”to set positive or negative for this Hi/Lo
Limit value. Then press the “ENTER” key to store the
Hi limit value for T1. Follow the same procedure for T2
In this Hi/Lo Limit SET mode, the value can not be
greater than ±1999.9 counts. If this value more than
±1999.9 counts, “Err” displayed and a valid limit must
be entered.
Set Cold Junction Compensation (TC OFFSET):
Press SET key to enter SET mode, then Press TC
OFFSET button to set TC OFFSET value. First, “CJC”
is displayed on LCD. The meter will then enter SET
TC OFFSET mode. “SET” and “T1” annunciator are
displayed.
Press “ ” or ” ”to increase or decrease the value of
the flashing digit, press “ ” to advance to the next digit
Press “ ” or ” ”to set positive or negative for this TC
OFFSET value. Then press the “ENTER” key to store
the TC OFFSET value for T1, next enter the TC
OFFSET value for T2. In this TC OFFSET SET mode,
the value can not be greater than ±5.0 counts. If this
value more than ±5.0 counts, “Err” displayed and a
valid offset must be entered.