Morris 59151 User manual

Cat# 59151
Multi-functional LED
Light Meter
USERMANUAL
Morris Products Inc www.morrisproducts.com 1-888-777-66788
Cat# 59151 Multi Function LED Light Meter
Table of Contents
TABLE OF CONTENTS ...................................................................................... 2
INTRODUCTION................................................................................................. 4
LIMITED WARRANTY, RIGHTS AND RESPONSIBILITIES ......................... 4
OPEN-PACKAGE INSPECTION ........................................................................ 4
SAFETY INFORMATION ................................................................................... 5
1 INTRODUCTION.............................................................................................. 9
1.1 PRODUCT DESCRIPTION ...........................................................ERROR!BOOKMARK NOT DEFINED.
1.2 OUTSTANDING FEATURES OF MULTI-FUNCTION LED LIGHT METER ................................................ 9
1.3 NAME AND FUNCTION OF COMPONENTS ........................................................................................ 10
1.3.1 Plan view............................................................................................................................... 10
1.3.2 LCD display interface........................................................................................................... 21
2 MEASUREMENT METHODS ....................................................................... 22
2.1 NOTICES PRIOR TO MEASUREMENT................................................................................................ 22
2.2 ACTION PRINCIPLES .................................................................ERROR!BOOKMARK NOT DEFINED.

2.2.1 Concepts of illuminance scales............................................................................................. 23
2.2.2 Unit conversion for illuminance scales................................................................................. 23
2.2.3 Conversion formula for illuminance and light intensity ....................................................... 23
2.3 TYPICAL PRACTICE CASES ............................................................................................................. 24
3 SPECIFIC APPLICATION .............................................................................. 27
3.1 APPLICATION OF MANUAL SWITCHOVER OF RANGE MEASUREMENT MODE ................................... 27
3.2 APPLICATION OF RELATIVE/PEAK VALUE MEASUREMENT MODE.................................................... 29
3.3 APPLICATION OF MAXIMUM/MINIMUM VALUE INQUIRY MODE....................................................... 30
3.4 APPLICATION OF DATA HOLD AND ZERO CALIBRATION MODE ........................................................ 31
4 OTHER FUNCTIONS ..................ERROR! BOOKMARK NOT DEFINED.
4.1 AUTO POWER-OFF.......................................................................................................................... 32
5 TECHNICAL DATA ........................................................................................ 33
6 MAINTENANCE AND SERVICE.................................................................. 35
6.1 SERVICE......................................................................................................................................... 35
6.2 CLEANING ..................................................................................................................................... 35
6.3 BATTERY REPLACEMENT ............................................................................................................... 36
6.4 CALIBRATION INTERVAL ................................................................................................................ 37
7 REFERENCE TABLE FOR ILLUMINATION STANDARD
OF VARIOUS LOCATIONS .............................................................................. 38
Cat# 59151 Multi Function LED Light Meter
Introduction
Thank you for your purchase of the multi-functional LED light meter. This meter will, with proper use,
provide years of reliable service; therefore, it is recommended that the user read carefully the user’s manual
before using the light meter and keep for reference.
Limited Warranty, Rights and Responsibilities
The product is guaranteed for one year from date of purchase against defects in material or workmanship.
This warranty does not extend to damage caused by fire (fusing), disposable battery (exhausted), accidents,
negligence, misuse, modification, pollution and abnormal operation.
Open-package inspection
Upon reception of the light meter, inspect it to ensure no damage during shipping.
If the user finds obvious damage or malfunction in operation, please contact MORRIS.
Included in Carton:
Light Meter
Instruction Manual
One 9 V alkaline cell, GL6F22A 1604A

Safety information
Warning
Do not use the light meter in the environment full of dust or
flammable gas and steam!
Safety mark description
This manual contains basic information for Multi
Functioanl LED Light Meter safe operation and
maintenance. Please read carefully the following
safety information before use.
Table 1: Safety information
Important information which the user must read before using the light
meter
Mark of conformity
Cat# 59151 Multi Function LED Light Meter
Table 2: Warning message
Warning
It indicates that incorrect operation will lead to serious injury or even
fatal accidents
Notice
It indicates that incorrect operation or negligence will lead to meter
damage or wrong measurement results, etc.
Tips
Operation suggestions or prompts
Operation considerations
User should observe the following notices to guarantee safe operation
and obtain optimum performance.
1: Preliminary check
Before initial use, please check if the light meter operates normally and if it is damaged during
storage and transportation. In case of any damage please contact MORRIS.

2: Storage & Operating Environment
Operational temperature
and humidity range
-10～50℃(14～122°F)
<80%RH (non-condensed)
Storage temperature and
humidity range
-10～+50℃(14～122°F)
<70%RH (non-condensed)
To avoid faults, please DO NOT place the light meter in following environments:
Direct sunlight
High temperature
Corrosive/
explosive gas
Mist /splash
High temperature/condensation Intensive
electromagnetic
environment
Dust Mechanical
vibration
Cat# 59151 Multi Function LED Light Meter
3: Use
Notice
1: The operation temperature range for the light meter is -10-50℃(14-122°F).
2: In order to avoid damage, especially falling accidents, handling and use should be avoided
during severe mechanical vibration.
3: The light meter can only be calibrated and repaired by professional personnel.
4: Before each use, the opto-sensor of light meter should be checked for damage and dust. Make
sure the meter is in good and clean condition. If one or more functions of the light meter are
irregular or not ready for operation, avoid using the meter.
5: During the operation of the light meter, the meter measurement value should not be at OL for
long time.
6: Keep the meter out of direct sunlight to guarantee its normal operation and long-term service
life.
7: If the meter is subject to intensive electromagnetic field, its function will be affected.
8: Only use batteries specified in technical data.
9: Batteries should not be stored in damp or cold locations. If the low battery symbol appears on
the display, the user should replace the batteries.

Tips
1: The accuracy of the optical detector will be reduced due to operating conditions or time.
Periodic calibration is required to maintain the basic accuracy.
1 Introduction
1.1 Outstanding features of the multi-function LED light meter
Automatic and manual range switching
Inquiry function for maximum and minimum values
Data hold function
Peak value measurement function
Relative value measurement function
Zero calibration function
3 1/2 bit LCD display, with analog bar display
Fc/Lux unit conversion function
Outrange indication (When the measured value exceeds the current range, LCD will display the signal
“OL” to indicate that the range is not adequate)
High precision. Measurement range (0.00～200000Lux)
Low battery indicator
Touch tone and mute function
Auto power-off function
(The machine will be powered off automatically keys are not operated for more than 10 minutes)
Compact design, durable, and portable.
Cat# 59151 Multi Function LED Light Meter
1.2 Name and Function of Components
1.21Plan view
①Opto-sensor protection cover
②Opto-sensor
③LCD display screen
④Compound key for main power and touch tone:
Power on/off: Briefly press the key to activate the machine and hold button down for 1 second to shut
it down. Touch tone on/off: With unit on, briefly press the key to turn on and off the touch tone.
⑤max and min values inquiry key
⑥Lux/Fc unit conversion key
⑦Compound key for data hold and zero calibration:
Data hold: Briefly press the key to enter/exit data hold mode.
Zero calibration: Press & hold button for 1 second to perform zero calibration function.
⑧Compound key for relative value and peak value measurement:
Relative value measurement: Briefly press the key to enter/exit relative value measurement mode.
Peak value measurement: Press & hold button for 1 second to enter/exit peak value measurement
mode.
⑨Key for manual range switching: Briefly press the key for 20.00Lux 200.0Lux 2000Lux 
20000Lux 200000Lux (or 20.00Fc 200.0Fc 2000Fc 20000Fc) range
Press & hold for 1 second to exit manual range switching mode.

LCD Display interface
①Prompt for manual range switching mode
②Prompt for data hold mode
③The analog bar shows the current measurement value information.
④The digit shows the current measurement value information.
⑤Lux unit
⑥FC unit
⑦Prompt for auto measurement mode
⑧Prompt for peak value measurement mode
⑨Prompt for low battery
⑩Prompt for relative value measurement mode
11.12Promptformaxandminvaluesinquiry
Cat# 59151 Multi Function LED Light Meter
Measurement Methods
1.3 Notices Prior to Measurement
Warning
1: Do not use the light meter in environments full of dusts or having gas substances and
flammable steam substances!
2: Do not use the light meter for measurement in the place with high temperature and high
humidity.
3: Do not use the light meter in environments with intense infrared or ultraviolet rays!
Tips
1: The opto-sensor of this meter is designed by simulating the sensitive curve of light obtained
through human eyes. The spectral coverage is between 320mm and 730mm. When it is used
for measurement within the infrared range, there will be a large data deviation.
2: The opto-sensor is calibrated by common electric incandescent lamp required by CIE under
the color temperature of 2854°K; the provided reading number may be different for the
spectrum of other lamps.
3: The reference level of light source test is at the top of the spherical surface illuminated.
4: The optical detector should be exposed to light for 2 minutes before measurement.
5: Shadows and other factors that might affect the optical detector should be avoided.

1.4 Measurement Values
1.4.1 Concepts of illuminance scales
One lux (lumen) indicates the illuminance on a surface of one square meter, all points of which are
one meter from a uniform source of one candela.
One foot-candle (Fc) indicates the illuminance on a surface of one square foot, all points of which are
one foot from a uniform source of one candela.
1.4.2 Unit conversion for illuminance scales
1 Fc = 10.764 lux 1 lux = 0.09290 Fc
1.4.3 Conversion formula for illuminance and light intensity
E = I / r 2
Wherein E --- illumination value (Unit: Lux)；
I --- Light intensity of the light source（Unit: cd）；
r --- Distance from the luminous surface of light source to the optical detector
(Unit: m）.
During measurement, the minimum distance between the luminous surface of light source and the
opto-sensor should be more than 15 times greater than maximum size of the luminous surface (or opto-sensor).
Cat# 59151 Multi Function LED Light Meter
1.5 Typical practice cases
In the following practice cases, the user stands under a light source.
Remove the protection cover of the 59151 multi-functional light meter and place it at right angle to the light
source, as shown in figure 2-1.
Press and hold the 59151 power key ④for a short time to power on the light meter. The LCD screen will
illuminate（about 5 seconds）with the buzzer beeping twice and “AUTO” will appear on the middle of LCD
display. This indicates that the auto measurement mode is ON.
Press and hold the manual range switching key ⑨of the 59151 for a short time, “MANU” will appear on the
top left position of the LCD display, indicating that the manual range switching mode has been activated. In this
mode, each time press and hold the key for a short time, the meter will switch to
20.00Lux—>200.0Lux—>2000Lux—>20000Lux—>200000Lux (or 20.00Fc—>200.0 Fc—>2000 Fc—>20000
Fc) in sequence; pressing the key for one second will result in the inscription “MANU” disappearing from top
left position of LCD display, replaced by “AUTO” appearing in the middle, to indicate that the meter has
switched the manual range switching mode to the auto range switchover.

Cat# 59151 Multi Function LED Light Meter
Press and hold the REL/PEAK key ⑧of the 59151 for a short time, “REL” will appear on the top left position
of the LCD interface, indicating the activation of the relative value measurement mode. Press and hold the key
⑧for a short time again, the device will exit the relative value measurement mode and return to the original
measurement mode, and “REL” on the top left position of the LCD interface will disappear; pressing the key for
one second will lead to the peak measurement mode, “PEAK” and “MANU” will appear on top right position of
LCD display; press and hold the key for one second once again, “PEAK” will disappear from the top right
position of the LCD interface, and “AUTO” will appear in the middle of LCD, and the mode will return to auto
measurement mode.
Press and hold max/min value inquiry key ⑤for a short time, “MAX” will appear on top position of LCD
interface, switching the device to the max/min value inquiry mode; in this mode, each short press of the key
causes the mode to change from MAX to MIN or from MIN to MAX; press and hold the “MAX/MIN” key ⑤
for one second, “MAX/MIN” on top position of the LCD interface will disappear, and the mode will exit.
Press and hold the data hold/zero calibration key ⑦of the 59151 for a short time to enter the data hold mode,
which will be indicated by the apparition of “HOLD” on the top left position of the LCD interface; press and
hold the key for a short time once again, “HOLD” will disappear from the top left position of the LCD interface,
and the device will exit the data hold mode. In any mode with sensor covered, press and hold data hold/zero
calibration key ⑦for one second, “ADJ” will appear on the LCD interface, and the device will enter the zero
calibration mode: several seconds later “ADJ” will disappear from the LCD interface, and the device will exit
the data hold mode and return to auto measurement mode.
Cat# 59151 Multi Function LED Light Meter
Figure2-1
Tips
1: The reference position of light source test is at the top of sphere surface under light.
2: In various measurement modes, analog bar in the middle of the LCD screen will change with
figures.
3: When reading, existing data can be locked in by pressing and holding “HOLD/ZERO” key
for a short time
4: In zero calibration modes, the opto-sensor must be covered by opto-sensor visor before
calibration.
5: After completing the test, the sensor protection cover should be put back to protect light filter
and sensor.

Cat# 59151 Multi Function LED Light Meter
2 Specific Applications
2.1 Application of manual switchover of range measurement mode
Press and hold the RAN key (range manual switchover key) for a short time, “MANU” will appear on
the top left position of the LCD interface, and the meter will enter the manual switchover
measurement mode (as shown in figure 3-1-1)
When entering manual switchover of range function, press RAN key for a short time each time, it will
switch to 20.00Lux—>200.0Lux—>2000Lux—>20000Lux—>200000Lux (or 20.00Fc—>200.0
Fc—>2000 Fc—>20000 Fc) in sequence
Press and hold RAN key for one second, “MANU” on the top left position of the LCD interface will
disappear, and “AUTO” will appear in middle of LCD interface, manual range switchover function
will exit and the device will return to auto range switchover mode;
Figure3-1-1
Cat# 59151 Multi Function LED Light Meter
20.00Lux interface 200.0Lux interface 2000Lux interface
20000Luxinterface 200000Luxinterface
Tips
1: In peak value measurement mode, relative value measurement mode and max/min value inquiry
mode, press RAN key for a short time.
2: In relative value measurement mode and max/min value inquiry mode, press and hold the key
for one second, it will return to auto switchover of range.
3: In peak value measurement mode, data hold mode and zero calibration modes, press and hold
RAN key.
4: In this mode, when measurement value exceeds present range, “OL” will appear on LCD
interface to indicate over-range, and the user should switch over the measurement range at this
time.

Cat# 59151 Multi Function LED Light Meter
2.2 Relative/peak value measurement mode applications
Press and hold REL/PEAK key for a short time (composite key for relative/peak value measurement),
“REL” will appear on the top left of the LCD screen (as shown in figure 3-1-2A), and the device will
enter the relative value measurement mode;
Press and hold REL/PEAK key for a short time again, “REL” on the top left of the LCD screen will
disappear, and the device will exit the relative value measurement mode and return to original
measurement mode;
Press and hold “REL/PEAK” key for one second, the device will enter the peak value measurement
mode, “PEAK” LCD will appear on the top right of the LCD screen, and at the same time, “MENU”
will appear on the top left of the LCD screen (as shown in figure 3-1-2B);
Press and hold the key once again for one second, “PEAK” on top right position of LCD screen will
disappear, and “AUTO” will appear on the middle of LCD screen, and the device will exit the peak
value measurement mode and return to auto measurement mode (as shown in 3-1-2C).
Figure3-1-2A Figure3-1-2B Figure3-1-2C
Cat# 59151 Multi Function LED Light Meter
Tips
1: In auto measurement mode, peak value measurement mode, max/min value inquiry mode and
data hold mode, press and hold REL/PEAK key for a short time.
2: In non-zero calibration mode, press and hold “REL/PEAK” for one second, the device will
enter the peak value measurement mode.
2.3 Application of maximum/minimum value inquiry mode
Press and hold “MAX/MIN” key for a short time, “MAX” will appear on top LCD interface (as shown
in figure 3-1-3);
In max/min value inquiry mode, press “MAX/MIN” key once, you will switch MAX to MIN or MIN
to MAX;
Press and hold “MAX/MIN” for one second, “MAX/MIN” on top LCD interface will disappear, and
the max/min value inquiry mode will exit.
Figure 3-1-3