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 operation 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 operator 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 temperatures 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 measurements. In the MAX/MIN recording mode, press the “HOLD” key to stop the recording. Press “HOLD” key again to resume recording. (Previously recorded readings are not erased.)
3. ” /°F” Button
Press “ ” button to toggle ON or OFF the backlight. The backlight will switch-off automatically after 30 seconds. 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 reference 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 manual). 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 Recording mode, (displays the Maximum reading, Minimum reading, “MAX-MIN” reading and Average reading stored in record mode). In this mode the automatic
power-off feature is disabled and “ ” key and all function 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 recorded, 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 input temperature value is above the Hi value, the beeper emits a continuous tone and “Hi” is displayed. When input 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 Junction 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 offset. (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 relative value. Then press the ”ENTER” key to set the relative 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 entered.
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.
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