background image

BT-66

IR THERMOMETER WITH EXTERNAL PROBE AND CARD STORAGE 

FUNCTION

OPERATION MANUAL

          1.     SAFETY RULES

To ensure that the meter is used safely, follow all safety and operating instructions in 

this operation manual. If the meter is not used as described in this operation manual, 

the safety features of this meter might be impaired.

Do not look directly into the laser beam when the device is in use–permanent eye 

damage may result.

Use extreme caution when operating the laser.

Never point the device towards anyone’s eyes.

Keep out of reach of children.

          2.     INTERNATIONAL SYMBOLS

          3.     SPECIFICATIONS

Important information

see manual

Laser device. Avoid towards 

anyone’s eyes

Item

Non-contact Infrared Scan 

Function

Thermocouple Probe Scan function

(K type; probe not included.)

100 to 2000°C

(212 to 3632°F)

-64 to +1400°C

(-83.2 to +2552°F)

Measurement 

Range

0 to +50°C (32 to 122°F)

±1% of reading or 1°C (1.8°F) 

whichever is greater (Test under 

Tamb.=23±6°C)

0.95 default – adjustable 0.1 to 1 step .01
0.1°C/0.1°F at -83.2 to +999.9(°C/°F), otherwise 1°C/1°F
2.3µm

1sec

Operating Range

Accuracy (Tamb. = 

23±3°C)

±2% of reading

Emissivity Range
Resolution
Spectral Range
Response Time 

(90%)

75:1 (90% energy covered)

Distance: Spot
Internal Memory
External Memory 

Type

Detailed 24 Memories with Temperature & Emissivity
Support Micro SD card (Recommend to use the attached Micro SD 

card). If the SD card data logger is failed, please reset switch (11)

USB Function

Please download the program from CD. (CD & USB cable are 

enclosed with the package)

Output Interface

SPI, USB, SD card

Battery Life

Typical 14 hours, minimum 10 hours continuous use (Alkaline 

battery, with laser and backlight)

Typical 20 hours, minimum 16 hours continuous use (Alkaline 

battery, with backlight but without laser)

203 x 176 x 58.3 mm (8 x 7 x 2.3 inch)
~400 g (14.1 oz) including batteries (AA*2pcs)

Dimensions

Note: Under the electromagnetic field of 3V/m from 180 to 600 MHz, the maximum error is

         10°C (18°F)

         Not recommend using external K-type thermocouple for long time measurement

         above 1000°C (1832°F)

         Max. support 128GB SDHC Card. If using SDHC memory card other than supplied,

         recommend do test before use.

          4.     THERMOMETER DESCRIPTIONS

5.     OPERATION

WARNING

The measurement range is for thermometers only. Users should choose proper probe 

types for different kinds of applications. Please make sure the target to be measured 

will not exceed the temperature range of the probe to avoid permanent damage to the 

thermocouple probe.
Caution: To avoid electric shock and thermometer damage, do not measure the live 

circuit with the thermocouple probe voltage exceeding 24V AC RMS or 60V DC.
EMC/RFI: Readings may be affected if the unit is operated within radiofrequency 

electromagnetic field strength of approximately 3 volts per meter, but the instrument's 

performance will not be permanently affected.

5.1     Function Selection
1.     Press Mode Key (2) for scrolling display functions as follows:

Display

Function

Here will show the emissivity data. (The default emissivity is 

0.95.)
Press Mode key (2), then press Up key (4) or Down key (3) to 

set the emissivity

, then press Mode key (2) to confirm it. The 

emissivity can be changed from 0.10 (10E) to 1 (100E).

Press Mode key (2) for the 

Maximum (MAX), Minimum (MIN). 

Differences between MAX & MIN (DIF) and Average (AVG) 

modes. The special modes reading will be displayed beside 

the mode icon during the measurement.

Press Up key (4) or Down key (3) to change the 

High Alarm 

(HAL)

 or 

Lo Alarm (LAL)

, then press Meas. Key (6) to confirm 

it. For example: When reading 26.9 °C < LAL 27 °C, the Low 

icon will flash, and you will hear a beep sound.

Connect the thermocouple with the thermocouple socket (5) and 

put the probe in/on the target. The Thermometer will display the 

temperature automatically without pressing any button. To see 

the minimum or maximum data during the probe measurement, 

please hold down the Up key (4) or Down key (3).

After measuring high temp, the probe may remain HOT for 

a while.

After taking the temperature, press Mode key (2) for the 

Memory 

(M00)

, then press Meas. key (6) to save the measurement. 

Under the 

Memory (M00)

, press the Up key (4) or Down key (3) 

to display the record.

** The Thermometer will automatically shut off if left idle for more than 60sec. unless in PRB 

mode. (In PRB mode, it will shut off if left idle for more than 12 minutes.)

5.2     Other Function Selection

In E, MAX, MIN, DIF, 

AVG mode:

In MAX, MIN mode: Hold 

the Meas. key (6)

In all modes: First, hold 

the Meas. key (6)

Press Up key (4) for LOCK mode ON/OFF. The lock mode is 

handy for continuous monitoring of temperatures for up to 60 

minutes.
Press Down key (3) for 

°C

 or 

°F transferred.

It shows 

RED

 colour when 

the reading is close to the 

maximum value and 

BLUE

 

when close to the minimum. 

While the temperature is 

between the maximum and 

minimum, the bar will display 

YELLOW

.

A.LCD Backlight: always on.

B.Press Down key (3) for laser pointer function ON/OFF.

5.3     Temperature Measurement

1.   Aim the Thermometer at the measured target with Lens (7) and press Meas. key (6) to 

      display the surface temperature. The Distance: Spot is 75:1. Please make sure the target 

      area is within the field of view.

** Data logger function (SD Card,USB): Recommend to clamp “Micro SD Card Switch” (11) 

with tweezers and pull it up to enable the function. Do not push the switch too hard.

1)

2)

3)


5.4     LCD Error Messages

The Thermometer incorporates visual diagnostic messages as follows:

‘Hi’ or ’Lo’ is displayed when the temperature is measured 

outside the HAL and LAL settings.

‘Er2’ is displayed when the Thermometer is exposed to rapid 

changes in the ambient temperature. ‘Er3’ is displayed when 

the ambient temperature exceeds the range of 0°C (32°F) ~ 

50°C (122°F). The Thermometer should be allowed plenty of 

time (minimum 30 minutes) to stabilize to the working/room 

temperature.

Error 5~9 is necessary to reset the Thermometer for all 

other error messages. To reset it, turn the instrument off, 

remove the battery and wait for a minimum of one minute, 

reinsert the battery and turn it on. If the error message 

remains, please contact the Service Department for further 

assistance.

‘Hi’ or ’Lo’ is displayed when the temperature being 

measured is outside of the measurement range.

A.     Body and Function Keys

B.     Default Screen

 
 

Laser

Class II Laser

Weight

Auto Power Off

12mins

Reviews: