Extech Instruments VIR50-NISTL User manual

User’s Manual
Dual Laser Video IR Video Thermometer
MODEL VIR50

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Introduction
Congratulations on your purchase of the Video IR Thermometer. This meter is capable of making
non-contact (infrared) and contact (thermocouple) temperature measurements. The built-in camera
offers still image and video capturing functionality for documenting measurement locations. The
meter includes a micro SD card slot for offloading still images and video.
The built-in laser pointer increases target accuracy while the backlit LCD and handy push-buttons
combine for convenient, ergonomic operation. This meter is shipped fully tested and calibrated and,
with proper use, will provide years of reliable service.
Features
2.2” TFT LCD display
640 x 480 pixels Digital Camera
Micro SD memory card
Image (JPEG) and video (3gp)
Humidity and Air Temperature Measurements
Dual laser targeting
Type-K thermocouple probe for contact measurements
Adjustable emissivity
High accuracy
Fast response time
Dew-point temperature and Wet bulb temperature functions
Safety
Use extreme caution when the laser pointer beam is on
Do not point the beam toward anyone's eye or allow the beam to
strike the eye from a reflective surface
Do not use the laser near explosive gases or in other potentially
explosive areas

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Meter Description
1. LCD Display
2. Push-buttons (UP/Picture, ESC, and DOWN/VIDEO)
3. Measurement Trigger
4. Retractable Lens Cover
5. Camera, Lasers, and IR sensor
6. Compartment for Type-K jack, USB jack, Reset button
7. Handle Grip and cover for Micro SD memory card slot and
Rechargeable Battery
Rear Panel
1 Display
2 ▲and Camera button
3 Power and ESC button
4 ENTER button
5 ▼and Video button
Front View
1 Camera lens
2 IR thermometer lens
3 Measurement trigger
4 Battery
5 Battery cover
6 Laser pointers
7 Micro SD card port
Note: A tripod mount is located on the bottom of the handle
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Operation
Power ON and OFF
1. The instrument is powered by one (1) rechargeable battery (3.7V). The battery is housed in the
compartment in the meter’s handle.
2. The supplied battery charger connects to the USB port on the instrument (in the compartment
above the measurement trigger).
3. Once the battery is charged, Press and Hold the button for 5 seconds to switch the
instrument ON.
4. Press and Hold the button to switch the unit OFF.
5. In the event that the instrument freezes operation (no reaction when pressing any button), insert
a paper clip into the Reset opening to trigger the RESET function.
6. For accurate readings, wait 30 seconds after powering on to allow the meter to stabilize.
Measurement Modes
The meter has four (4) measurement modes: Video + Infrared, Infrared-only, Dew Point, and
Datalogging mode. When the meter is switched ON, the first screen that appears is the mode
selection screen. Use the ▲/▼buttons to highlight the desired mode and then press the ENTER
button to access the mode.
Video + Infrared mode: the meter functions as an IR meter with the
camera capabilities;
Infrared-only mode: the meter functions as an IR meter only;
Dew Point mode: the meter shows the Dew Point temperature value;
Datalogging mode: the meter functions as a measurement
storage/retrieval device.
Display Symbols
Symbol Description Symbol Description
Video + IR mode High alarm
IR-only mode High alarm triggering
Dew Point mode Low alarm
Laser Low alarm triggering
Scan Hold

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Video + IR mode
In the Video + IR Mode the meter can measure IR temperature, air temperature, humidity, dew-point
temperature, and wet bulb temperature, along with full use of the video camera capabilities. The IR
Maximum (MAX) Temperature, IR Minimum (MIN) Temperature, IR Differential (DIF) Temperature,
and the IR Average (AVG) Temperature can also be displayed. Press and hold trigger to measure
the temperature.
Capturing Still Images (Photographs)
In the Video + IR mode, press the button to take a photograph. Press the button again to
save the photo (the SAVE soft-key will appear above the up arrow button after the photograph is
taken). Press the ▼button to cancel the photo
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Capturing Video
In the Video + IR mode, press the button to enter the video capture mode and then press the
button again to begin recording video. Press the ESC button to exit. Use the ▼button to stop
the video.

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IR-only mode
In the IR-only Mode the meter can measure IR temperature, air temperature, air humidity, dew-point
temperature, and wet bulb temperature but without the video camera capabilities. The IR Maximum
(MAX) Temperature, IR Minimum (MIN) Temperature, IR Differential (DIF) Temperature, and the IR
Average (AVG) Temperature can also be displayed. Press and hold trigger to measure the
temperature.
Dew Point Temperature Mode
In the Dew Point mode the meter displays the Dew Point temperature measurement along with the
IR temperature value. Press and hold the measurement trigger to take a measurement.
In the Dew Point mode the percentage bargraph
indicates how close the IR temperature is to the Dew
Point temperature. At 100%, the two values are identical.

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Datalogging Mode
The datalogger automatically records readings to memory at a programmed interval. In the
Datalogging mode, the high/low alarm values, low alarm value, datalogging interval sampling rate
(time), can be configured.
Once configured, press the trigger to start logging. The unit will automatically record data at the
specified sampling time. Press the ESC buttom to exit the DATALOG mode, the meter will
automatically save the data to a file.
Set the high and low alarm values for the datalogger
From the Datalogger screen (shown above) use the arrow keys to select the HIGH or the LOW
alarm value parameter and then press the ENTER button. Use the ▲and ▼buttons to adjust the
alarm value, then press the ENTER button to confirm.
Set interval time for the datalogger
From the Datalogger screen use the arrow keys to select the interval TIME parameter and then
press the ENTER button. Use the ▲and ▼buttons to adjust the time value (logger sampling rate)
in seconds and then press the ENTER button to confirm.
Select the line color for the datalogger
From the Datalogger screen use the arrow keys to select the COLOR parameter and then press the
ENTER button. Use the ▲and ▼buttons to select a line color and then press the ENTER button to
confirm.

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System Tools Settings
From the Video + IR, IR-only, or Dew Point modes, press the ENTER button to access the soft-key
screen. The System Tools is the icon on the left. Use the arrow buttons to scroll over to the System
Tools icon if it is not already highlighted.
Press the ENTER button again when the System Tools icon is highlighted to access the System
Tools settings mode. From the datalogger mode scroll down to the Measure Set parameter and press
ENTER to access to the System Tools setting menu.
Use the ▲and ▼buttons to select an item and then press the ENTER button to access it.
Item Description
Languages Set the language
Date/Format Set the date and format of the date
Time/Format Set the time and format of the time
Units Select the temperature unit of measure
Memory Display the memory and SD card capacity
Buzzer Set the buzzer on or off
Auto screen-off Select the time before the screen automatically turns
off
Auto power-off Select the time before the VIR50 automatically
powers off.
System Default Setting Restores the VIR50 to its default settings
System Upgrade Upgrades the system via the SD card

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Setting the Language
Use the ▲and ▼buttons to select the desired language, and
press the ENTER button to confirm.
Setting the Date
Use the ▲and ▼buttons to select the desired format for the
date, and press the ENTER button to confirm. Once the format
has been chosen, use the ▲and ▼buttons to select the day,
month, and year.
Setting the Time
Use the ▲and ▼buttons to select the desired format for the
time, and press the ENTER button to confirm. Once the format
has been chosen, use the ▲and ▼buttons to select the
minute, hour, and AM/PM (where applicable).

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Setting the temperature units (C/F)
Use the ▲and ▼buttons to select the desired unit of measure, press the ESC button to exit and
save.
Memory
Use the ▲and ▼buttons to select either FLASH or SD CARD, and press the ENTER button to
confirm. Then select either WORKING SPACE or FORMAT, and press the ENTER button to confirm.
If FORMAT was pressed, click YES or NO to confirm.