REED LX-105 User manual

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Model LX-105
Illuminometer
Instruction
Manual
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/

reedinstruments
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2
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Table of Contents
Features......................................................................................... 3
Specications.............................................................................3-5
Instrument Description.................................................................. 6
Operating Instructions..............................................................7-11
Zero Adjustment ......................................................................... 7
Selecting Measuring Unit ............................................................ 7
Selecting Maximum Range.......................................................... 7
LCD Display................................................................................ 8
Data Hold ................................................................................... 8
Relative % Light Measurements .................................................. 8
Data Record (Max, Min and Average Reading) ............................ 9
Quick Measurement.................................................................... 9
Auto Power Off ........................................................................... 9
Contrast Adjustment ................................................................. 10
RS232 PC Interface .............................................................10-11
Battery Replacement................................................................... 11

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3
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Features
• Simultaneous display of Foot Candles or Lux, plus four lighting types
• Measuring Ranges: 200.0/2000/5000 Fc; 2000/20,000/50,000Lux
• Microprocessor assures maximum accuracy
• Super large 1.4” (1999 count) LCD display
• Displays % differential from reference point
• “ZERO” re-calibration
• Utilizes precision photo diode colour correction lter
• Cosine & colour corrected measurements
• 4% of full scale accuracy is enhanced by selecting lighting type
(Tungsten/Daylight, Fluorescent, Sodium, Mercury)
• Record/Recall Min, MAX & AVG readings
• Data Hold plus Auto shut-off
• Built-in RS-232 serial interface, optional software
• Optional Windows® compatible & DOS Data Acquisition software &
serial cable enables user to display & capture readings on a PC
• Optional battery powered datalogger stores over 8000 readings for later
transfer to a PC
Specifications
Circuit: Custom one-chip microprocessor LSI
Display: 13mm (0.5”) Dual function LCD display with
contrast adjustment
Lighting Type Selection: Daylight, tungsten, uorescent & mercury lamp
Ranges: LUX: 0 - 50,000 LUX, 3 ranges
Foot-candle: 0 - 5,000 Ft-cd, 3 ranges
Relativity: 0 - 1999%
Sensor: An exclusive photo diode & color correction
lter, spectrum designed to meet CIE

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4
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Memory Recall: Records maximum, minimum and average
readings with recall facilities
Sample Time: Approximately 0.4 seconds
Zero Adjustment: By push button
Power Off: Manual off by push button, or auto shut off after
10 minutes
Data Output: RS 232 PC serial interface
Overload Indication: “- - - -”
Operating Temperature: 0°C to 50°C (32°F to 122°F)
Operating Humidity: Maximum 80% RH
Power Supply: 006P DC 9V battery or equivalent
Weight: 335g/0.77lb (includes batteries)
Dimensions: Instrument: 180 x 72 x 32mm (7.1 x 2.8 x 1.3”)
Sensor probe: 85 x 55 x 12mm (3.2 x 2.2 x 0.5”)
Includes: Sensor with protective cover
Optional Accessories:
Datalogger (Model DL-9601)
Data Acquisition Software (Model SW-U801-WIN)
RS232 Cable (Model UPCB-01)
USB Cable (Model USB-01)
Soft Carrying Case (Model CA-05A)
continued ...

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5
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Electrical Specifications
Note: Accuracy tested by a standard parallel tungsten light bulb of 2856°K
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [e-mail]
Range Resolution Accuracy
2,000 Lux 1 Lux ± (4% + 2dgt)
20,000 Lux 10 Lux
50,000 Lux 100 Lux
200 Ft-cd 0.1 Ft-cd
2,000 Ft-cd 1 Ft-cd
5,000 Ft-cd 10 Ft-cd
Measurment Range Resolution
Relativity 0 to 1999% 1%
Measurement Range Max. In-Range Display
LUX 2,000 Lux 0-1,999 Lux
20,000 Lux 1,800-19,990 Lux
50,000 Lux 18,000-50,000 Lux
Foot-Candle 200 Ft-cd 0-186.0 Ft-cd
2,000 Ft-cd 167-1,860 Ft-cd
5,000 Ft-cd 1,670-5,00 Ft-cd

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6
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Instrument Description
1. Display
2. ON/OFF button
3. Data hold button
4. LUX/FC (Ft-cd) button
5. LCD contrast adjustment
6. Memory record button
7. Call button
8. Light source select button
9. Zero button
10. % button (Relativity)
11. Range switch
12. Light sensor
13. Sensor cover
14. Light sensor plug
15. Light sensor input socket
16. RS-232 output
17. Battery compartment/button cover

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7
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Operating Instructions
Press the ON/OFF button to turn the instrument on.
Zero Adjustment
• Cover the light sensor using the sensor cover provided
• Slide the range switch to the 2000 LUX position
• Press the zero button and the display will show a value of zero
• When completed remove the sensor cover
Selecting Measuring Unit
Select the desired measuring unit by pressing the LUX/FC button. The
display will indicate the selected unit of either LUX or ft-cd. Determine
the lighting type (Daylight, Tungsten, Fluorescent or Mercury lamp) by
pressing the light source select button. The LCD will indicate the selected
lighting type by displaying the following symbols:
L = Tungsten F = Fluorescent
S = Daylight C = Mercury
Selecting Maximum Range
Select the maximum range by using the range switch and position the
light sensor directly under the light source
• Overload conditions will be indicated by “- - - -” on the display and
you will need to select the next higher range
• Out of range conditions will be indicated by “_ _ _ _” on the display
and you will need to select the next lower range

reedinstruments
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8
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
LCD Display
On the 20000 LUX range the last digit will be shown on the lower line of
LCD display. On the 50000 LUX range the last two digits will show on the
lower line of LCD display.
For example: On the 20000 range, if the display shows the above it means
the real display is 15620 LUX
Note: The digits on the lower display are multipliers only (i.e. x10 and
x100 respectively). These digits will not change, and will only be
indicated by a 0.
Data Hold
While taking a measurement, press the data hold button and the meter
will hold the displayed values. A DH symbol will appear to indicate that
data hold had been activated. To cancel the data hold function, press the
data hold button once more.
Relative % Light Measurements
While taking a measurement, press the % button and the current value will
be indicated as 100%. All the subsequent measurements will be indicated
as a percentage, relative to the value from when the button was pressed.
The formula used is as shown below:
To deactivate this feature, press the % button again.
New light values x100
Light value when % button was pressed
1562 LUX
0

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9
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Data Record (Max, Min and Average Reading)
The data record function displays the maximum, minimum and average
readings. To start the data record function, press the record button once.
A REC symbol will appear on the LCD display.
With the “REC” symbol indicated on the display:
• To display the maximum recorded value, press the call button once.
A MAX symbol will appear on the display.
• To display the minimum recorded value, press the call button again.
A MIN symbol will appear on the display.
• To display the average recorded value, press the call button again.
An AVG symbol will appear on the display.
• To deactivate the data record function, press the record button.
All associated indicators will disappear from the display.
Quick Measurement
Main procedures:
Power ON – Zero Adjustment – Select Measuring Unit – Select Range
Optional measuring procedures:
Data Hold – Memory Record – RS232 Output
Power Management:
Auto Power Off or Manual Power Off
Note: Auto Power Off is not active during the data record function
Auto Power Off
The instrument has built-in auto power off in order to prolong battery
life. The meter will switch off automatically if no buttons are pressed within
10 min. To deactivate this feature, press the record button during
a measurement.

reedinstruments
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10
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Contrast Adjustment
The instrument features the ability to adjust the contrast of the display.
This is achieved by controlling the LCD contrast adjustment.
RS232 PC Interface
The instrument features an RS232 output via 3.5mm terminal.
The connector output is a 16 digit data stream which can be utilized to the
user’s specic application. An RS232 lead with the following connection
will be required to link the instrument with the PC serial input.
The 16 digit data stream will be displayed in the following format:
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Each digit indicates the following status:
D0 End word
D1 to D4 Upper display reading, D1=LSD, D4=MSD
D5 to D8 Lower display reading, D5=LSD, D8=MSD
D9 Decimal point (DP) for upper display.
D10 0=No DP, 1=1 DP, 2=2 DP, 3=3 DP, ect…
Decimal point (DP) for lower display.
0=No DP, 1=1 DP, 2=2 DP, 3=3 DP, ect…
D11 & D12 Indicator for upper display
00=No symbol 07=mg/L 14=mS
01=°C 08=m/s 15=Lux
02=°F 09=Knots 16=Ft-cd
03=% 10=Km/h 17=bD
04=%RH 11=Ft/min 18=mV
05=%PH 12=mile/h
06=%O2 13=uS
Meter (3.5mm jack plug) PC (9W D connector)
Center Pin Pin 2
Ground/shield Pin 5
continued ...

reedinstruments
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11
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Battery Replacement
1) When the left corner of LCD display shows LBT you will need to replace
the battery
2) Slide the battery cover away from the instrument and remove the
battery
3) Install a 9V battery and replace the cover
Notes _________________________________________
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D13 Indicator for lower display
0=No symbol 1=°C 2=°F
D14 Reading polarity for the display
0=Both upper & lower display values are +
1=Upper -, lower +
2=Upper +, lower -
3=Both upper & lower display values are -
D15 Start word

reedinstruments
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12
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
Notes _________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
________________________________________________
For service on this or any other REED product or information on other
REED products, contact REED Instruments at [e-mail]