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Operation Instructions
Power on/off:
Press“ ” to power the meter on/off.
Data Hold:
Whilst in measurement mode, press “ ”, the LCD display will clearly
display “HOLD” which indicates the data is frozen, to release the held
reading. Press the “ ” button again the release the reading.
MAX/MIN:
Whilst in measurement mode, press“ ”，to cycle through the maximum
or minimum recorded light levels. The LCD display will clearly display
“MAX”, or “MIN” to indicate the displayed value. Press and hold “ ” to
exit MIN/MAX mode and return to normal measurement mode.
Lux / Fc:
With the meter turned on, press “ ” to toggle between measurement
units, Lux and Foot-candles.
°C / °F Mode:
Whilst the meter is turned off, press and hold “ ” and press “ ”. The
unit will power on with the temperature unit (°C/°F) toggled.
Auto Power Off
Whilst the meter is turned off, press and hold “ ” and press “ ”. The
unit will turn on with the auto power off feature toggled off.
Note: If the icon is displayed, the auto power off feature is enabled.
Additional Notes
1) Recommended recalibration cycle: 1 year.
2) Remove the battery when the meter is to be stored for long periods of time to avoid
battery leakage.
3) When the battery is low，the low battery indicator will appear.
A new battery is needed.
4) Do not store or operate the meter in high temperature or humidity.
5) Wind blowing across the microphone increases the noise measurement. Use the
supplied windscreen to cover the microphone when appliance.
6) Keep the microphone dry and avoid severe vibration.
This unit complies with EMC
ATP INSTRUMENTATION LTD
THE ONE STOP INSTRUMENT SHOP
WWW.ATP-INSTRUMENTATION.CO.UK
Sales: 01530 566800 Technical: 01530 566804
UNIT 22 Tournament Way, Ashby-De-La-Zouch, Leicestershire, LE65 2UU
MINI COLOUR LCD LIGHT METER
MT-912
USER MANUAL
Important Safety Notice
Read the following safety information carefully before attempting to operate or service the
meter. Use the meter only as specified in this manual; otherwise, the protection provided by
the meter may be impaired.
Environmental Operating Conditions
Humidity:
≤ 90% RH (Non-condensation)
Operating temperature:
-20 to 60°C / -4 to140°F
Maintenance
Repairs or servicing not covered in this manual should only be performed by qualified
personnel.
Wipe the unit with a dry soft cloth. Do not use abrasives or solvents on this instrument.
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Application
This Light Meter is designed to meet the measurement requirements of safety Engineers,
Health & Safety practices and Sound Quality Control in environments such as factories,
schools, construction, etc.
Features
• High accuracy, fast response
• Color LCD display with backlight
• Temperature measurement
• Min / Max Memory
• Data Hold
• Automatically revise parameters for
nonstandard illumination
• Selectable measurement units LUX/FC
• Enable / Disable auto power off
• Low battery indication
Specification
Display
4 digits color LCD display
Measuring range
0 Lux to 200K Lux, 0Fc to 20K Fc
Resolution
<1000 : 0.1 ； >1000:1
Spectral response
CIE photopic（CIE human eye response curve）
Over range indication
LCD displays "-OL-" or "-LO-"
Spectral accuracy
CIE Vλfunction(f1’≦6%, f2’≦ 2%)
Accuracy
±3% rdg±8 d (<10,000Lux)，±4% rdg±10d (>10,000Lux)
Sampling rate
500ms
Photo detector
Silicon photo-diode with spectral response filter
Battery life
at least 60 hours
Enable/Disable
Auto power off
The meter shuts off automatically after 15 minutes of inactivity.
Auto power off can be disabled
Operating conditions
Temperature:-20 to 60°C, -4 to 140°F Humidity: 10% to 90% RH
Storage conditions
Temperature:-20 to 60°C, -4 to 140°F Humidity: 10% to 75% RH
Power supply
3 x 1.5V “AAA” batteries
Dimension(L*W*H)
174.5 x 56 x 30.5mm
Weight
84g
Meter Description
1. Photo detector
2. LCD display
3. Hold button
4. Power ON/OFF button
5. MAX/MIN button
6. Fc/Lux button
7. Battery compartment
8. Nameplate
LCD Display Description
1. Hold icon
2. Auto power off Icon
3. Temperature readings
4. Light readings
5. Illuminance units Icon
6. Temperature unit Icon
7. Low battery indication
8. MAX/MIN icon
Accessories：
1. User Manual
2. 3 x 1.5V AAA Battery
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