Omega Engineering Thermometer HH801B User Manual

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.  
mode.  
SAFETY INFORMATION  
8. “ ” Button  
It is recommended that you read the safety and opera-  
tion instructions before using the thermometer.  
The ” ” key increases the value of the selected  
digit.(See “SET mode” later in this manual.)  
9. “TC OFFSET” Button  
2. “HOLD” Button  
WARNING  
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.)  
To avoid electrical shock, do not use this instrument  
when working voltages at the measurement surface  
over 24V AC or DC.  
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  
OPERATING INSTRUCTIONS  
MODEL HH801B  
WARNING  
DUAL INPUT J/K/T/E  
DIGITAL THERMOMETER  
To avoid damage or burns, do not make temperature  
measurement in microwave ovens.  
The “ ” key moves to the next digit on the display  
(See “SET mode” later in this manual.)  
3. ”  
/°F” Button  
CAUTION  
11.“ ” Button  
Repeated sharp flexing can break the thermocouple  
leads. To prolong lead life, avoid sharp bends in the  
leads, especially near the connector.  
Press “ ” button to toggle ON or OFF the backlight.  
The “ ” key decreases the value of the selected digit  
(See “SET mode” later in this manual.)  
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.  
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:  
The  
symbol on the instrument indicates that the opera-  
tor must refer to an explanation in this manual.  
SPECIFICATIONS  
4. “REL” Button  
Press “SET” key to enter SET mode, then Press  
“REL” button to set relative value. SET”, “REL” and  
“T1” annunciators are displayed.  
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.  
ELECTRICAL  
Temperature Scale: Celsius or Fahrenheit user-selectable  
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.  
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.  
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.  
(0.1%rdg+1°C) on -60°C to 1372°C  
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.  
(0.1%rdg+2°C) on -60°C to -220°C  
(0.1%rdg+2°F) on -76°F to 1999°F  
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.  
(0.1%rdg+4°F) on -76°F to -364°F  
ENVIRONMENTAL  
6. “MAX/MIN” Button: Record mode  
Ambient Operating Ranges:  
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  
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.  
power-off feature is disabled and “  
GENERAL  
” key and all func-  
tion keys are disabled. The beeper emits a tone when a  
new maximum or minimum value is recorded.  
Display: 3_ digit liquid crystal display (LCD) with a  
maximum reading of 1999.  
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.  
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.  
Polarity: Automatic, positive implied, negative polarity  
indication.  
Overrange: “OL” or “-OL” is displayed.  
Zero: Automatic.  
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.  
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).  
MADE IN TAIWAN  
FEATURES:  
Thermocouple offset adjustment.  
7. “Hi/Lo” Button: LIMITS mode  
Highly accurate thermometer with 0.1% basic accuracy.  
Three displays for easy observations.  
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  
Weight: approx. 265g including batteries.  
OPERATING INSTRUCTIONS  
1. “ ” Power Button  
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.  
The “ ” key turns the thermometer on or off. In the  
MAX/MIN record mode the meter cannot be powered  
 

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