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MTP
INSTRUCTION MANUAL
DIGITAL ILLUMINANCE METER
MODEL MTP-1210
MTP Instruments
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Ⅰ INSTRUCTION
Congratulations on the purchase of your digital
illuminance meter model MTP-1210. Proper use
and care of this meter will provide many years of
reliable service.
The digital illuminance meter is a precision
instrument used to measure illuminance (lux,
footcandle) in the field.
It meets CIE photopic spectral response.
It is fully cosine corrected for the angular
incidence of light.
The illuminance meter is compact, tough and
easy to handle owing to its construction.
The light sensitive component used in the
meter is a very stable, long-life silicon photo
diode and spectral response filter
.
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Ⅱ FEATURES
Light-measuring levels ranging form from:
0.01lux~0.1klux/0.01fc~0.01kfc,repeatedly.
High accuracy and fast response.
Data-hold function for holding measuring values.
Unit and sign display for easy reading.
Automatic zeroing.
Meter corrected for spectral relative efficiency.
Correction factor does not need to be manually
calculated for non-standard light sources.
Short rise and fall times.
Peak-hold function for tracing the peak signal of light
pulse with least duration 10μs and keep it.
Capable of selecting measuring mode in lux or fc scale
alternatively.
Auto power off 30 minutes.
Maximum and minimum measurements.
Relative reading & Reset function.
Easy to read large backlit display
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Ⅲ SPECIFICATIONS
Display : 3-3/4 digit LCD with high speed 42 segment
bargraph.
Measuring Range: 40.00 lux,400.0 lux,4000 lux,40.00
Kkux and 300.0 klux /40.00 fc,400.0 fc,4000 fc,30.00
kfc.
NOTE: 1fc=10.76lux, 1Klux=1000lux,1Kfc=1000fc
Overrange Display: LCD will show “OL” symbol.
Spectral Response: CIE Photopic. (CIE human eye
response curve).
Spectral Accuracy: CIE Vλ function f1’≦6%
Cosine Response: f2’ ≦2%
Accuracy: ±5% rdg±0.5% f.s.
Repeatability: ±3%
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Sampling Rate: 13.3 times/sec of analog bar-graph
indication; 1.3times/sec of digital display.
Photo Detector: One silicon photo diode and spectral
response filter.
Operating temperature & Humidity :
0℃ to 40℃ (32℉to 104℉) & 0% to 80% RH.
Storage Temperature & Humidity :
-10℃ to 50℃ (14℉ to 140℉) & 0% to 70% RH.
Power Source: 1 piece 9V battery.
Photo detector Lead Length: 150cm (approx.);
Photo detector Dimensions: 115L×60W×20H(mm);
Meter Dimensions: 170L x 80W x 45 H
Weight: 390g.
Accessories: Carry case, instruction manual, battery.
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Ⅳ NAME OF PARTS AND POSITIONS
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1. LCD Display: 3-3/4 digit displays with a maximum
reading of 3999, and the indicating signs of measured
values, unit function symbols and decimal points etc.,
are displayed.
2. Range Selector key: It indicates 40.00 lux, 400.0 lux,
4000 lux, 40.00 Klux and 300.0 Klux /40.00 fc,400.0
fc,4000 fc,30.00 Kfc total 5 ranges for lux and 4 ranges
for fc.
3. Power Control key: The power switch key turns the
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illuminance meter ON or OFF.
4. MAX/MIN key: Maximum and minimum reading recorder
control key.
5. RESET key: Push function reset control key.
6. BACKLIGHT key: Back ight control key.
7. REL key: Relative reading control key.
8. Data-Hold key: Data Hold control key.
9. Peak Hold key: Peak Hold recorder control key.
10. FC key: Pressing the fc key selects taking measurement
of illuminance in footcandle scale and, 1 footcandle =
10.76 lux.
11. Lux key: Pressing the lux key selects taking
measurement of illuminance in lux scale.
12. Photo detector.
Ⅴ OPERATING INSTRUCTIONS
1. Power-up: Press the power key to turn the meter ON or
OFF.
2. Selecting the lux or fc scale: Set the range selection
switch to desired lux or fc range.
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3. Remove the photo detector cap and face it light source
in a horizontal position.
4. Read the illuminance nominal from the LCD display.
5. Overrange: If the instrument only displays “OL”, the
input signal is too strong, and a higher range should be
selected.
6. Data-Hold mode: Press the hold key to select Data-Hold
mode. When HOLD mode is selected, the illuminance
meter stops all further measurements. Press the HOLD
key again to exit Data-Hold mode. Then it resumes
normal operation.
7. Peak-Hold recorder mode: Press and hold down PEAK
key until display shows the “CAL” letter, then press
PEAK key cycle through Pmax and Pmin recorder mode,
and expose the photo detector to light pulse measuring
field. Press and hold down PEAK key 2 seconds to exit
PEAK recorder mode, then the meter will resume
normal operation.
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8. Maximum and Minimum recorder mode: Press
MAX/MIN key to cycle through Maximum(MAX) reading,
Minimum(MIN) reading and current reading(MAX/MIN
blink) recorder mode. Press MAX/MIN key two seconds
to exit this mode.
9. Relative reading mode: Press REL key to enter Relative
mode. The display shows zero value and the current
reading will be stored as a zero-in value. Press again to
exit this mode.
10. Reset mode: Every time this key is pressed, the
selected function (HOLD, MAX/MIN,REL,PEAK except
BACK-LIGHT) ,auto-power-off function and counter will
be reset.
11. Backlight function: Press the backlight key to turn on.
Press again to turn off.
12. When the measurement is completed, replace the photo
detector cap and turn the meter off.
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Ⅵ BATTERY CHECK-UP & REPLACEMENT
1. When the battery power is not sufficient, LCD will
display low battery, and replacement of one new battery
is required.
2. After turning off the meter, remove the battery cover with
a screwier.
3. Disconnect the battery from the instrument and replace
it with a standard 9V battery and replace the cover.
Ⅶ SPECTRAL SENSITIVITY CHARACTERISTIC
To the detector, the applied photo diode with filters
makes the spectral sensitivity characteristic
almost meet C.I.E. (INTERNATIONAL
COMMISSION ON ILLUMINATION) Photopic
curve V (λ) as the following chart described.
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Ⅷ MAINTENANCE
1. The white plastic disc on the top of the detector should
be cleaned with a damp cloth when necessary.
2. Do not store the instrument where temperature or
humidity is excessively high.
3. The reference level, as marker on the face plate, is the
tip of the photo detector globe.
4. The calibration interval for the photo detector will vary
according to operational conditions, but generally the
sensitivity decreases in direct proportion to the product
of luminous intensity by the operational time. In order to
maintain the basic accuracy of the instrument, periodic
calibration is recommended.
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Ⅸ RECOMMENDED ILLUMINATION
1fc=10.76Lux
LOCATIONS Lux fc
OFFICE
FACTORY
Conference,
200~750 18~70
Reception room
Clerical work 700~1,500 65~140
Typing drafting 1,000~2,000 93~186
Visual work at
300~750 28~70
production line
Inspection work 750~1,500 70~140
Electronic parts
1,500~3,000 140~279
assembly line
Packing work,
150~300 14~28
Entrance passage
HOTEL
Public room,
100~200 9~18
Cloakroom
Reception 200~500 18~47
Cashier 750~1,000 70~93
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STORE
Indoors Stairs
Corridor
150~200 14~18
HOSPITAL
Show window,
Packing table
Forefront of show
window
Sickroom,
Warehouse
Medical Examination
Room
Operating room,
emergency
750~1,500 70~140
1,500~3,000 140~279
100~200 9~18
300~750 28~70
750~1,500 70~140
SCHOOL
treatment
Auditorium, Indoor
Gymnasium
Class room 200~750 18~70
Laboratory, Library,
Drafting, room
100~300 9~28
500~1,500 47~140
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Warranty Clause
MTP Instruments warrants this instrument to be free
of defects in parts and workmanship for one (1) year
from date of shipment. This warranty does not apply
to defects resulting from action of the user such as
misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or
unauthorized modification. MTP Instruments
specifically disclaims any implied warranties or
merchantability or fitness for a specific purpose and
will not be held liable for any direct, indirect, incidental
or consequential damages. MTP Instruments total
liability is limited to repair or replacement of the
product.
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Les Instruments
MTP
Instruments
Head Office
4409, Charleroi street
Montreal-North, Quebec
H1H 1T6
Telephone: (514) 326-7167 Fax: (514) 326-7835
Toll free number: 1-888-326-7167
Website: www.mtpinc.com
E-mail: info@,mtpinc.com
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