Tektronix J18 Instruction Manual Instruction Manual
J18
LumaColor II Photometer
Instruction Manual
070-9021-03
This document applies to firmware version 2.00
and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to the Safety Summary prior to
performing service.
Copyright E Tektronix, Inc. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
EC Declaration of Conformity
We
T ektronix Holland N.V.
Marktweg 73A
8444 AB Heerenveen
The Netherlands
declare under sole responsibility that the
J18 LumaColor Photometer
meets the intent of Directive 89/336/EEC for Electromagnetic
Compatibility . Compliance was demonstrated to the following
specifications as listed in the official Journal of the European
Communities:
EN 50081–1 Emissions:
EN 55022 Radiated, Class B
EN 55022 Conducted, Class B
EN 60555–2 Power Harmonics
EN 50082–1 Immunity:
IEC 801–2 Electrostatic Discharge
IEC 801–3 RF Radiated
IEC 801–4 Fast Transients
IEC 801–5 Surge
WARRANTY
Tektronix warrants that this product will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If any such product
proves defective during this warranty period, Tektronix, at its option, either will repair the
defective product without charge for parts and labor, or will provide a replacement in
exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect
before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to
a location within the country in which the Tektronix service center is located. Customer
shall be responsible for paying all shipping charges, duties, taxes, and any other charges for
products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or
improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; or c) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS
PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE
DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY
PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary viii. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preface ix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Product Description 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J18 LumaColor II Photometer Features 1–1. . . . . . . . . . . . . . . . .
Unpacking the J18 LumaColor II Photometer 1–2. . . . . . . . . . . .
Repackaging for Shipment 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Options 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Battery Warning 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery Installation 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Optional AC Power Adapter 1–5. . . . . . . . . . . . . . . . . . .
Functional Check 1–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Basics
Functional Overview 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J18 Front Panel 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J18 Control Descriptions and Operation 2–2. . . . . . . . . . . . . . . . . .
J18 Display 2–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J18 Side Panel Connections 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tutorial 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Conditions 2–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storing Measurements 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recalling Stored Measurements 2–7. . . . . . . . . . . . . . . . . . . . . . . .
Comparing Measurements 2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J18 Photometer Instruction Manual
i
Table of Contents
Reference
RS-232D Operation 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS-232 Pin Connections 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Syntax 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commands 3–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog Output 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 3–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Performance Verification
Maintenance
Service Strategy 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Parts
Replaceable Parts 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List 7–1. . . . . . . . . . . . . . . . . . . . . . . .
Appendices
Appendix A: Photometry and Radiometry Reference A–1. . . . .
Photometric Relationships A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Photometric Formulas A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiometric Relationships A–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiometric Formulas A–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A Note on the Relation of Photometric and Radiometric Data A–3.
Appendix B: Chromaticity Reference B–1. . . . . . . . . . . . . . . . . .
The 1931 CIE Chromaticity Diagram B–2. . . . . . . . . . . . . . . . . . . .
The 1976 CIE-UCS Chromaticity Diagram B–6. . . . . . . . . . . . . . .
Spectral Tristimulus Values B–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary and Index
ii
J18 Photometer Instruction Manual
List of Figures
Figure 1–1: Low Battery Warning Icon 1–3. . . . . . . . . . . . . . . . . . .
Figure 1–2: Replacing the Battery 1–4. . . . . . . . . . . . . . . . . . . . . . .
Figure 1–3: Location of J18 Power Adapter Connector 1–5. . . . . .
Figure 1–4: Initial Power-On Display 1–7. . . . . . . . . . . . . . . . . . . .
Figure 1–5: Typical Display Test 1–8. . . . . . . . . . . . . . . . . . . . . . . .
Figure 1–6: Typical Firmware Version Display 1–8. . . . . . . . . . . . .
Figure 1–7: Typical Zero Display 1–9. . . . . . . . . . . . . . . . . . . . . . .
Figure 1–8: T ypical Color Chromaticity Display 1–9. . . . . . . . . . .
Figure 1–9: T ypical Single Channel Display 1–10. . . . . . . . . . . . . . .
Figure 1–10: Sensor Head Missing or Not Recognized Display 1–10
Figure 2–1: Measurement with HOLD 2–6. . . . . . . . . . . . . . . . . . .
Figure 2–2: Selecting a Reference Memory Position 2–7. . . . . . . .
Figure 2–3: Typical Differential Measurement Display 2–8. . . . . .
Figure 3–1: Location of the RS-232D Port 3–1. . . . . . . . . . . . . . . .
Figure 3–2: RS-232 Pin Connections 3–2. . . . . . . . . . . . . . . . . . . .
Figure 3–3: Sample Measurement Message 3–3. . . . . . . . . . . . . . .
Figure 3–4: Location of the Analog Output 3–9. . . . . . . . . . . . . . .
Table of Contents
Figure 6–1: Test Point Locations on the A1 Board 6–6. . . . . . . . . .
Figure 7–1: J18 Replaceable Parts 7–3. . . . . . . . . . . . . . . . . . . . . . .
Figure 7–2: J18 Optional Accessories 7–4. . . . . . . . . . . . . . . . . . . .
Figure B–1: The 1931 CIE Chromaticity Diagram B–3. . . . . . . . . .
Figure B–2: 1931 CIE Chromaticity Diagram Showing Color
T emperature B–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure B–3: Correlated Color T emperature Diagram B–5. . . . . . . .
Figure B–4: 1976 CIE-UCS Chromaticity Diagram B–7. . . . . . . . .
Figure B–5: Spectral Tristimulus Values for Equal Spectral Power
Source (CIE 1931 Standard 2° Observer) B–8. . . . . . . . . . . . . .
J18 Photometer Instruction Manual
iii
T able of Contents
List of Tables
Table 2–1: Factory Preset 6500 K White Values 2–9. . . . . . . . . . .
T able 3–1: RS-232D Parameters 3–1. . . . . . . . . . . . . . . . . . . . . . .
T able 3–2: Measurement Units 3–4. . . . . . . . . . . . . . . . . . . . . . . . .
T able 3–3: J18 Command Syntax 3–5. . . . . . . . . . . . . . . . . . . . . . .
T able 3–4: J18 Command Set 3–7. . . . . . . . . . . . . . . . . . . . . . . . . .
T able 3–5: Analog Output Specifications 3–10. . . . . . . . . . . . . . . . .
T able 4–1: Warranted Electrical Specifications 4–1. . . . . . . . . . . .
T able 4–2: Typical Electrical Specifications 4–1. . . . . . . . . . . . . .
T able 4–3: Warranted Environmental Specifications 4–2. . . . . . . .
T able 4–4: Typical Mechanical Specifications 4–2. . . . . . . . . . . . .
T able 4–5: Warranted Sensor Ranges 4–3. . . . . . . . . . . . . . . . . . . .
T able B–1: Spectral Tristimulus Values for Equal Spectral Power
Source (CIE 1931 Standard 2° Observer) B–9. . . . . . . . . . . . . .
iv
J18 Photometer Instruction Manual
General Safety Summary
Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it.
Only qualified personnel should perform service procedures.
Injury Precautions
Do Not Operate in Wet/Damp Conditions
To avoid electric shock, do not operate this product in wet or damp
conditions.
Do Not Operate in Explosive Atmosphere
To avoid injury or fire hazard, do not operate this product in an
explosive atmosphere.
Wear Eye Protection
To avoid eye injury, wear eye protection if there is a possibility of
exposure to high-intensity rays.
Product Damage Precautions
Use Proper Power Source
Do not operate this product from a power source that applies more
than the voltage specified.
Do Not Operate With Suspected Failures
If you suspect there is damage to this product, have it inspected by
qualified service personnel.
J18 Photometer Instruction Manual
v
General Safety Summary
Do Not Immerse in Liquids
Clean the probe using only a damp cloth. Refer to cleaning
instructions.
Safety Terms and Symbols
Terms in This Manual
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that
could result in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property .
Terms on the Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you
read the marking.
WARNING indicates an injury hazard not immediately accessible as
you read the marking.
CAUTION indicates a hazard to property including the product.
vi
J18 Photometer Instruction Manual
General Safety Summary
Symbols on the Product
The following symbols may appear on the product:
DANGER
High Voltage
Protective Ground
(Earth) T erminal
ATTENTION
Refer to
Manual
Double
Insulated
J18 Photometer Instruction Manual
vii
Service Safety Summary
Only qualified personnel should perform service procedures. Read
this Service Safety Summary and the General Safety Summary before
performing any service procedures.
Do Not Service Alone
Do not perform internal service or adjustments of this product unless
another person capable of rendering first aid and resuscitation is
present.
viii
J18 Photometer Instruction Manual
Preface
This manual contains information to support user operation and
service of the J18 LumaColor II Photometer.
The manual is divided into User and Service sections that are
separated by a yellow page.
User Information
The user information details the control and operation of the
photometer. This section also provides detailed information for the
analysis of the photometer readings. The user information is divided
into four chapters:
H Getting Started
H Operating Basics
H Reference
H Specifications
Service Information
The service section details user-level maintenance and repair of the
photometer.
H Performance Verification
H Maintenance
H Replaceable Parts
H Appendices
H Glossary and Index
J18 Photometer Instruction Manual
ix
Preface
x
J18 Photometer Instruction Manual
Getting Started Getting Started
Product Description
The J18 is a digital photometer, radiometer, and colorimeter. The
interchangeable J1800 series sensor-heads provide the ability to
make a variety of light measurements.
J18 LumaColor II Photometer Features
The J18 provides the following features:
H Real-time color measurements
H Auto zero
H Readings in either English or metric units
H RS-232D interface for remote control
H Interchangeable heads for future expansion
H Battery or AC-powered operation (AC adapter available as an
optional accessory)
H Backlighted display
H Analog output
J18 Photometer Instruction Manual
1–1
Product Description
Unpacking the J18 LumaColor II Photometer
This section describes the accessories that are shipped with the J18.
If the contents of the shipping container are incomplete or damaged,
contact your T ektronix representative.
The J18 LumaColor II Photometer is shipped with the following
equipment:
H J18 LumaColor II Photometer
H Instruction Manual (this manual)
H Alkaline battery (Installed)
IEC type 6LR61, NEDA type 1604
Repackaging for Shipment
If you must ship the J18 or one of the J1800 series sensor heads,
package it as follows:
1. Use the original carton, or an equivalent carton with dimensions
at least three inches greater than the instrument to allow for
proper cushioning.
1–2
2. Cover the instrument with a polyethylene bag to protect its finish.
3. Cushion the instrument on all sides with packing material. Seal
the carton with shipping tape or with an industrial stapler.
4. If you are shipping the product to a T ektronix Service Center, be
sure to label the carton with the name of your company, a person
to contact at your company, and a description of the problem.
J18 Photometer Instruction Manual
Power Options
The J18 may be powered by either of two sources:
H A non-rechargeable nine-volt alkaline battery
H An external AC power adapter, available as an optional
accessory. (See the Replaceable Parts section for information
about available accessories.)
NOTE. When switching between power sources, cycle the photometer
power off and then on again to enable the photometer to auto-zero
using the new power source.
Low Battery Warning
When battery voltage is below 7.2 volts, the J18 displays the flashing
warning battery icon in the upper left corner of its display. At this
point, you should replace the battery (see Figure 1–1).
The battery icon flashes
when the battery voltage
drops below 7.2 V.
+–
HOLD REF
Figure 1–1: Low Battery Warning Icon
If the battery voltage is below 7.2 volts at initial power-on, the J18
will not complete the self-test.
J18 Photometer Instruction Manual
1–3
Power Options
Battery Installation
CAUTION. Follow the manufacturers’ guidelines for the handling and
disposal of batteries.
To replace the alkaline battery (refer to Figure 1–2):
1. Turn off the J18.
2. Open the battery compartment located on the back cover of
the J18.
3. Remove the old battery, and replace it with a new one. Arrange
the wires so that they will not interfere with the battery cover.
4. Close the battery compartment.
5. Turn on the J18 and make sure that the low-battery warning is
not flashing.
1–4
Figure 1–2: Replacing the Battery
J18 Photometer Instruction Manual
Using the Optional AC Power Adapter
The J18 may be powered with the optional external AC power
adapter. The power adapter will override the internal battery if one
is installed. T o ensure accurate measurements, cycle the photometer
power off and then on again to permit the photometer to autozero
using the new power source.
Plug the pin connector of the adapter into the EXT. POWER
connector on the side of the J18 (see Figure 1–3). Plug the power
adapter into a 120 VAC AC power outlet. (A 220 V AC adapter is
also available.)
S
Power Options
ANALOG
+
OUTPUT
RS232D
Figure 1–3: Location of J18 Power Adapter Connector
CAUTION. Be sure that any power supply you use with the J18
provides power within the range of 9 to 16 VDC. Also, the center
contact polarity of the adapter is positive (+). A power supply that
does not meet these requirements may damage the J18.
The backlight will be lit at power-on when the J18 is powered by the
AC power adapter. The backlight may be turned off, if desired, by
pressing the BACKLIGHT button.
NOTE. AC power adapters that provide less than 12 volts may not
automatically turn on the backlight.
J18 Photometer Instruction Manual
1–5
Power Options
1–6
J18 Photometer Instruction Manual
Functional Check
The J18 performs a self-test when first turned on. The self-test is
successfully completed under the following conditions:
H A “fresh” battery must be installed, or the AC adapter must be
attached.
H A recognized sensor head must be attached. (The J18 will not
recognize the J1820 sensor head.)
1. Cover the sensor to block out any light before turning on power
to the J18.
2. When power is initially turned on, the display reminds you to
cover the sensor; see Figure 1–4. If the sensor is uncovered, the
display flashes and the self-test does not continue.
Figure 1–4: Initial Power-On Display
NOTE. If the photometer is turned on with the sensor uncovered,
cover the sensor and cycle the photometer power off and then on
again. This procedure ensures a complete photometer auto-zero.
J18 Photometer Instruction Manual
1–7
Functional Check
3. After the auto-zero is complete, all of the display characters are
shown as a display test. See Figure 1–5.
+
–
+–
+
-
+
-
+
-
Figure 1–5: Typical Display Test
4. After the display test is complete, the display shows the firmware
version that is installed. See Figure 1–6.
1–8
Figure 1–6: Typical Firmware Version Display
J18 Photometer Instruction Manual
Functional Check
5. After the firmware version is displayed, the photometer initially
displays zeros until the sensor cover is removed. See Figure 1–7.
Figure 1–7: Typical Zero Display
6. Remove the cover from the sensor head and aim the sensor to
take a measurement. If the sensor head is a multi-channel sensor,
the photometer displays the measurement in the selected color
coordinate system. See Figure 1–8.
Figure 1–8: Typical Color Chromaticity Display
J18 Photometer Instruction Manual
1–9
Functional Check
If the attached sensor head is a single channel sensor, the photometer
displays only one value for the measurement. See Figure 1–9.
Figure 1–9: Typical Single Channel Display
7. If a sensor head is not attached, or the sensor head is not
recognized, the J18 flashes the error message shown in
Figure 1–10.
1–10
Figure 1–10: Sensor Head Missing or Not Recognized Display
J18 Photometer Instruction Manual
Operating Basics Operating Basics
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