AEMC INSTRUMENTS CA811 Digital Light Meter User Manual
- June 13, 2024
- AEMC INSTRUMENTS
Table of Contents
LIGHTMETERS
User Manual
CA811
CA813
CA811 Digital Light Meter
Statement of Compliance
Chauvin Arnoux® , Inc. d.b.a. AEMC® Instruments certifies that this instrument
has been calibrated using standards and instruments traceable to international
standards.
We guarantee that at the time of shipping your instrument has met its
published specifications.
An NIST traceable certificate may be requested at the time of purchase, or
obtained by returning the instrument to our repair and calibration facility,
for a nominal charge.
The recommended calibration interval for this instrument is 12 months and
begins on the date of receipt by the customer. For recalibration, please use
our calibration services. Refer to our repair and calibration section at
www.aemc.com.
Serial #: ____
Catalog #: 2121.20 / 2121.21
Model #: CA811 / CA813
Please fill in the appropriate date as indicated:
Date Received: ___
Date Calibration Due: _
INTRODUCTION
WARNING
- Do not connect to, or touch, any electrical circuit with the Lightmeter.
- Do not operate the Lightmeter in wet or excessively damp environments.
- To avoid injury or fire hazard, do not operate this product in an explosive atmosphere or environment.
- To avoid eye injury, wear eye protection if there is a possibility of hazardous or dangerous exposure to high-intensity light rays.
- Do not immerse in liquids. Clean the sensor head only using a damp cloth.
- Place the protective cover on the sensor when not in use (protects the sensor and extends useful cell life).
- Comply with the safety and environmental specifications.
1.1 International Electrical Symbols
|
This symbol signifies that the instrument is protected by double or reinforced
insulation.
---|---
| This symbol on the instrument indicates a WARNING and that the operator must
refer to the user manual for instructions before operating the instrument. In
this manual, the symbol preceding instructions indicates that if the
instructions are not followed, bodily injury, installation/sample and product
damage may result.
| Risk of electric shock. The voltage at the parts marked with this symbol may
be dangerous.
| This symbol refers to a type A current sensor. This symbol signifies that
application around and removal from HAZARDOUS LIVE conductors is permitted.
****| In conformity with WEEE 2002/96/EC
1.2 Definition of Measurement Categories
CAT IV: For measurements performed at the primary electrical supply (<1000V)
such as on primary overcurrent protection devices, ripple control units, or
meters.
CAT III: For measurements performed in the building installation at the
distribution level such as on hardwired equipment in fixed installation and
circuit breakers.
CAT II: For measurements performed on circuits directly connected to the
electrical distribution system. Examples are measurements on household
appliances or portable tools.
1.3 Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are consistent with
the packing list. Notify your distributor of any missing items. If the
equipment appears to be damaged, file a claim immediately with the carrier and
notify your distributor at once, giving a detailed description of any damage.
Save the damaged packing container to substantiate your claim.
1.4 Ordering Information
Lightmeter Model CA811……………………………………………Cat. #2121.20
Includes 9V alkaline battery, rugged, shockproof, protective holster and user
manual.
Lightmeter Model CA813 …………………………………………..Cat. #2121.21
Includes 9V alkaline battery, rugged, shockproof, protective holster and user
manual.
PRODUCT FEATURES
2.1 Description
The Lightmeter Models CA811 and CA813 are portable, easy-to-use instruments
featuring optical sensors that are designed to match the response of the human
eye, making them ideal instruments for workspace analysis and planning. The
ergonomically designed case, large display and intuitive function selection
make these instruments the right choice for any application.
The Lightmeter Models CA811 and CA813 are designed for simple onehand
operation. They provide selectable lux or footcandle units for display and
feature a 3½ digit backlit LCD digital display and a HOLD function.
The Model CA811 offers a MAX function, while the Model CA813 offers a PEAK
function and a broader light response.
- Photodiode sensor
- 3½ digit display
- RANGE selector
- MAX (CA811) or PEAK (CA813)
- Removable light sensor
- HOLD button
- Power/mode selector
2.2 Button Functions
2.2.1 Center (Yellow) Function Switch
Turns the Lightmeter ON and selects the lux or fc (foot-candles) setting.
Slide the switch to OFF after use.
2.2.2 RANGE Button
The RANGE button changes the measurement range. At power-up, the selected
range is 2000 fc or 2000 lux.
Press the RANGE button until the desired lux or fc range is selected. Each
time you press the RANGE button, the range will increase by a factor of ten
(x10), and a new value is displayed. The scale factor (fc, kfc, lux, klux) is
displayed in the lower left hand corner of the display.
2.2.3 HOLD Button
The HOLD button “freezes” the reading on the display.
Press the HOLD button to activate the HOLD function. In the HOLD mode, the
HOLD annunciator is displayed in the upper part of the LCD display and the
last reading is displayed until the HOLD button is released.
2.2.4 Back-light Button
Press the
button to turn the Back-light ON. Press again to turn OFF.
2.2.5 MAX Button (Model CA811)
Press the button for 2 seconds to enter or exit the MAX mode. When enabled,
MAX is displayed in the upper right hand corner of the display.
The Lightmeter then records and displays the maximum absolute value. It is
only updated when a new MAX is reached.
2.2.6 PEAK Button (Model CA813)
Press the button for 2 seconds to enter or exit the PEAK mode. When enabled,
PEAK is displayed in the upper left hand corner of the display.
In the PEAK mode, the Lightmeter records and displays the maximum absolute
value over a 50ms period and is updated when a new PEAK is reached.
SPECIFICATIONS
Light Conversion Formulas 1 foot-candle (lumens/foot2 ) = 10.764 lux
1 lux (lumens/meter 2 ) = 0.0929 foot-candles
The Inverse-square Law
The inverse-square law states that the illuminant E at a point on a surface
varies directly with the intensity I of a point source, and inversely as the
square of the distance d between the source and the point. If the surface at
the point is normal to the direction of the incident light, the law is
expressed by E=I/d 2.
Cosine Law
The cosine law states that the illuminant on any surface varies with the
cosine of the angle of incidence. The angle of incidence q is the angle
between the normal to the surface and the direction of the incident light. The
inverse-square low and the cosine law can be combined as E=(I cos q) /d2.
3.1 Environmental Specifications
Range (CA811): 20 lux, 200 lux, 2000 lux, 20k lux 20 fc, 200 fc, 2000 fc, 20k
fc
Range (CA813): 20 lux, 200 lux, 2000 lux, 20k lux, 200k lux 20 fc, 200 fc,
2000 fc, 20k fc
Resolution: 0.01 lux, 0.01 fc
Accuracy (Type A 2856K light source): ±5% ± 10cts
Accuracy for Common Light Sources (CA811): ±18% ± 2cts
Accuracy for Common Light Sources (CA813): ±11% ± 2cts
Cosine Angle: ƒ’2 <2% cosine corrected (150°)
Spectral Response: CIE photopic curve
Spectral Accuracy (CA811): ƒ’1 <15%
Spectral Accuracy (CA813): ƒ’1 <8%
Temperature Coefficient:0.1timestheapplicableaccuracyspecification per °C from
0° to 18°C and 28° to 50°C (32° to 64°F and 82° to 122°F) PEAK Hold Response
Time (CA813): > 50ms light pulse
Note: TheCIEstandardilluminanttypeAmaybeobtainedbymeansofCIE standard
type A light source, which is defined as type A gas type filled tungsten-
filament lamp operating at a correlated color temperature of 2856K.
3.2 General Specifications
Display: 3½ digit LCD with maximum reading of 1999
Over-Range: “ ” is displayed
Power Source: Standard 9V battery (NEDA 1604, 6LR61 or equivalent)
Battery Life: 200 hours typical with carbon zinc battery
Low Battery Indication:The is displayed when the battery voltage drops below
the required level
Sample Rate: 2.5 times per second, nominal
Operating Temperature: 32° to 122°F (0° to 50°C) at < 80% RH
Storage Temperature: -4° to 140°F (-20° to 60°C), 0 to 80% RH with battery
removed
Accuracy: Stated accuracy at 73° ± 9°F (23° ± 5°C), <75% RH
Altitude: 2000m max
Dimensions: 6.81 x 2.38 x 1.5″ (173 x 60.5 x 38mm)
Weight: Approx 7.9 oz (224g) including battery
3.3 Safety Specifications
* EN 61010-1 (1995-A2), Protection Class III
Overvoltage Category (CAT III, 24V), Pollution Degree 2 Indoor Use
All specifications are subject to change without notice
CIE PHOTOPIC CURVE**
Wavelength (nm)| VI CIE Photopic Luminous Efficiency Coefficient| Photopic
Lumen/ Watt Conversion Factor
---|---|---
380| 0.0000| 0.05
390| 0.0001| 0.13
400| 0.0004| 0.27
410| 0.0012| 0.82
420| 0.0040| 3.
430| 0.0116| 8.
440| 0.0230| 16.
450| 0.0380| 26.
460| 0.0600| 41.
470| 0.0910| 62.
480| 0.1390| 95.
490| 0.2080| 142.0
500| 0.3230| 220.0
510| 0.5030| 343.0
520| 0.7100| 484.0
530| 0.8620| 588.0
540| 0.9540| 650.0
550| 0.9950| 679.0
555| 1.0000| 683.0
560| 0.9950| 679.0
Wavelength (nm)| VI CIE Photopic Luminous Efficiency Coefficient| Photopic
Lumen/Watt Conversion Factor
---|---|---
570| 0.9520| 649.0
580| 0.8700| 593.0
590| 0.7570| 516.0
600| 0.6310| 430.0
610| 0.5030| 343.0
620| 0.3810| 260.0
630| 0.2650| 181.0
640| 0.1750| 119.0
650| 0.1070| 73.0
660| 0.0610| 41.
670| 0.0320| 22.
680| 0.0170| 12.
690| 0.0082| 6.
700| 0.0041| 3.
710| 0.0021| 1.
720| 0.0010| 0.716
730| 0.0005| 0.355
740| 0.0003| 0.170
750| 0.0001| 0.820
760| 0.0001| 0.041
OPERATION
4.1 Recommendations Before Operating
- Keep the white plastic domed cosine corrector clean and free of any scratches. It may be cleaned with a soft cloth and a little water or isopropyl alcohol.
- Avoid reflections or shadows from your body onto the sensor, when light is emitted from many directions.
- For best accuracy, repeat measurements several times to ensure that the light source is stable.
- Avoid flexing the cable excessively at either end.
4.2 Operating Instructions
- Slide the function switch to the desired lux or fc (foot-candle) setting.
- Select the appropriate range or, if in doubt, select the highest setting (klux or kfc).
- Remove the sensor head cover.
- Hold the sensor head steady and make sure that the light completely fills the cosine correction white dome.
- Move away from the sensor head to avoid shadowing it. The sensor head has a 5 ft (1.5m) extension cable to allow separation between the case and the unobstructed measurement location.
- Press the RANGE button until an optimum reading range is obtained.
- Read the illuminant value directly from the display.
- When finished, slide the function switch to OFF and cover the sensor head (extends the sensor life).
MAINTENANCE
Use only factory specified replacement parts. AEMC® will not be held
responsible for any accident, incident, or malfunction following a repair done
other than by its service center or by an approved repair center.
5.1 Replacing the Battery
The symbol appears on the display when replacement is needed.
Replace with a standard 9V battery (NEDA 1604, 6LR61).
To replace the battery:
- Turn the Lightmeter OFF.
- Remove the rubber holster.
- Remove the screw from the back of the meter and lift off the battery cover.
- Replace the battery, then put the rear cover and holster back on.
5.2 Cleaning
- Use a soft cloth lightly dampened with soapy water.
- Rinse with a damp cloth and then dry with a dry cloth.
- Do not use any abrasives or solvents.
- Do not let any liquid enter the case or sensor area.
Repair and Calibration
To ensure that your instrument meets factory specifications, we recommend that
it be scheduled back to our factory Service Center at one-year intervals for
recalibration, or as required by other standards or internal procedures.
For Instrument repair and calibration:
You must contact our Service Center for a Customer Service Authorization
Number (CSA#). This will ensure that when your instrument arrives, it will be
tracked and processed promptly. Please write the CSA# on the outside of the
shipping container. If the instrument is retumed for calibration, we need to
know if you want a standard calibration, or a calibration traceable to
N.I.S.T. (Includes calibration certificate plus recorded calibration data).
Ship To: Chauvin Arnoue, Inc. d.b.a. AEMC° Instruments 15 Faraday Drive
Dover,NH 03820 USA
Phone: 800-945-2362 (Ext.360)
603-749-6434 (Ext. 360)
Fax: 603-742-2346 or
603-749-6309
E-mail: repair@aemc.com (Or contact your authorized
distributor)
Costs for repair, standard calibration, and calibration traceable to N.I.S.T.
are available.
NOTE: You must obtain a CSA# before returning any Instrument.
Technical and Sales Assistance
If you are experiencing any technical problems, or require any assistance with
the proper operation or application of your instrument, please call, fax or
e-mail our technical support team:
Contact: Chauvin Arnoux°, Inc. d.b.a. AEMC° Instruments
Phone: 800-945-2362 (Ext. 351)
603-749-6434 (Ext. 351)
Fax: (603 742-2346 E-mail: techsupport@aemc.com
Limited Warranty
The Models CA811 and CA813 are warranted to the owner for a period of two
years from the date of original purchase against defects in manufacture. This
limited warranty is given by AEMC® Instruments, not by the distributor from
whom it was purchased. This warranty is void if the unit has been tampered
with, abused or if the defect is related to service not performed by AEMCs
Instruments.
For full and detailed warranty coverage, please read the Warranty Coverage
Information, which Is attached to the Warranty Registration Card (If enclosed)
or Is available at www.aemc.com. Please keep the
Warranty Coverage information with your records.
What AEMC ® Instruments will do: If a malfunction occurs within the warranty
period, you may return the instru-iment to us for repair, provided we have
your warranty registration information on file or a proof of purchase. AEMCe
Instruments will, at its option, repair or replace the faulty material.
REGISTER ONLINE AT: www.aemc.com
Warranty Repairs
What you must do to return an Instrument for Warranty Repair:
First, request a Customer Service Authorization Number (CSA#) by phone or by
fax from our Service Department (see address below), then return the
instrument along with the signed CSA Form. Please write the CSA# on the
outside of the shipping container. Return the instrument, postage or shipment
pre-paid to:
Ship To: Chauvin Arnoux® , Inc. d.b.a. AEMC®
Instruments
15 Faraday Drive • Dover, NH 03820 USA
Phone: 800-945-2362 (Ext. 360)
603-749-6434 (Ext. 360)
Fax: 603-742-2346 or 603-749-6309
E-mail: repair@aemc.com
Caution:To protect yourself against in-transit loss,were commend you in sure your returned material.
NOTE: You must obtain a CSA# before returning any instrument.
03/18
99-MAN 100238 v13
Chauvin Arnoux® , Inc. d.b.a. AEMC®
Instruments
15 Faraday Drive • Dover, NH 03820 USA • Phone:
603-749-6434 • Fax:
603-742-2346
www.aemc.com