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INSTRUCTION MANUAL: IL1400A Radiometer / Photometer INSTRUCTION MANUAL:
IL1400A
Radiometer / Photometer




© 1998 International Light, Inc.
All Rights Reserved.
No part of this publication may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording, or any
information storage and retrieval system, without permission in writing from the
copyright owner. Requests should be made trough the publisher.
Technical Publications Dept.
International Light, Inc.
17 Graf road
Newburyport, MA 01950-4092
Printed in the United States of America
Contents

1. CONTROLS
5
1.1 DISPLAY .......................................................................................................................... 5
1.2 BUTTONS ........................................................................................................................ 5
1.3 INPUTS / OUTPUTS ........................................................................................................ 5

2. OPERATION - QUICK REFERENCE
6
2.1 ON / OFF .......................................................................................................................... 6
2.2 SIGNAL MODE ................................................................................................................ 6
2.3 INTEGRATE MODE ......................................................................................................... 7
2.4 Disabling the Automatic Shut-Off Feature .................................................................. 8

3. INPUTS - DETECTORS
9
3.1 GENERAL ....................................................................................................................... 9
3.2 SL021 / XRL140 - UV STABILIZED SILICON PHOTODIODE DETECTOR ................ 10
3.3 SEL033 - UV STABILIZED SILICON PHOTODIODE DETECTOR .............................. 10
3.4 SL095 - UV STABILIZED SILICON PHOTODIODE DETECTOR ................................. 10
3.5 SEL240 - SOLAR BLIND VACUUM PHOTODIODE DETECTOR ................................ 10
3.6 SEL400 S-5 RESPONSE VACUUM PHOTODIODE DETECTOR ................................ 11
3.7 SEL623 THERMOPILE DETECTOR ............................................................................. 11

4. OUTPUTS
11
4.1 DISPLAY MESSAGES ................................................................................................... 11
4.2 ANALOG DATA RECORDER OUTPUT ........................................................................ 13
4.3 TTL SERIAL OUTPUT ................................................................................................... 14

5. OPTICAL CALIBRATION
16
5.1 N.I.S.T. TRACEABLE FACTORY CALIBRATION ......................................................... 16
5.2 MILITARY STANDARD 45662A CALIBRATION .......................................................... 16

6. PROGRAM MODE - OPERATION
16
6.1 PROGRAM MODE - Quick Reference: ...................................................................... 17
6.2 Disabling the Automatic Shut-Off ............................................................................... 18
6.3 Changing the Displayed Units .................................................................................... 19
6.4 Changing the Sensitivity Factor ................................................................................. 19
6.5 Read-Only Menu Screens ............................................................................................ 20
6.6 NONSTANDARD DETECTORS & INPUT DEVICES .................................................... 21
6.7 SELF CALIBRATION .................................................................................................... 21

7. PRECAUTIONS
22

8. APPLICATIONS
22
8.1 CURRENT AND CONDUCTANCE MEASUREMENTS ................................................ 22
8.2 FLUX DENSITY MEASUREMENTS ............................................................................. 23
8.3 FLUX MEASUREMENTS .............................................................................................. 27
8.4 RADIANCE / LUMINANCE (Brightness) MEASUREMENTS ..................................... 27
8.5 L.E.D MEASUREMENTS .............................................................................................. 28
8.6 TRANSMISSION MEASUREMENTS ............................................................................ 28
8.7 REFLECTANCE MEASUREMENTS ............................................................................. 28
8.8 SPATIAL RESPONSE ................................................................................................... 29
8.9 TEMPORAL RESPONSE .............................................................................................. 30
9. GENERAL SPECIFICATIONS
31
9.1 ELECTRICAL SPECIFICATIONS ................................................................................. 31
9.2 OPTICAL ACCURACY .................................................................................................. 31
9.3 SIZE AND WEIGHT ....................................................................................................... 31
9.4 ENVIRONMENTAL SPECIFICATIONS ......................................................................... 31

10. MAINTENANCE AND REPAIR
32
10.1 PREVENTIVE MAINTENANCE .................................................................................. 32
10.2 BATTERY REPLACEMENT ........................................................................................ 32
10.3 DISASSEMBLY AND PC BOARD REPLACEMENT .................................................. 32
10.4 USER REPAIR POLICY .............................................................................................. 32

11. ONE YEAR WARRANTY
32
1. CONTROLS


1.1 DISPLAY








The IL1400A uses a two line, thirty-two (32) character
Supertwist Liquid Crystal Display (see above) to portray
numerical data, units, mode of operation, and instrument
status alphanumerically in bit-mapped graphics. If the
instrument is turned on without a detector plugged in, the
display will instruct the user to SHUT POWER OFF,
PLUG DETECTOR IN, in order to properly initialize the
IL1400A system.
The top line displays sixteen (16) characters,
representing the most recent data and units from the
detector. The detector data is displayed in three or four digit
(depending on digit reliability) decimal form with a + / -
sign. The SI or English optical units are displayed to the
right of this numerical data in standard abbreviated form,
such as mW/cm
2
(milliwatts per square centimeter), with the
prefix scaling by 1000 as the data autoranges, from femto-
(10
-15
) to mega- (10
6
). A typical reading for the top line of
the display, for example, would be +123.4 mW/cm
2
.
The bottom line also displays sixteen (16) characters of
information, representing the mode of operation and the
instrument status. The mode of operation, such as
SIGNAL, HI INTEG, LO INTEG, or ZEROING is
continuously displayed on the left side of the bottom line.
The characters to the right are reserved for blinking status
messages such as HOLD, OVR RNG, NO OFF and
BAT LO, with up to two status messages being alternately
displayed. In continuous measurement mode, the bottom
line of the display will typically read SIGNAL, with the
status display blank unless the hold button was depressed or
an error situation arises.


1.2 BUTTONS

The five buttons on the front surface of the IL1400A
were designed with ease of operation in mind, with the
microprocessor making most decisions for the user.
The ON/OFF button turns the instrument on or off. A
detector must be plugged in for the IL1400A to properly
initialize when first turned on. The instrument will
automatically turn itself off to preserve the battery life if no
buttons are pressed for a period of ten (10) minutes.
The SIGNAL button selects the continuous wave
signal measurement mode, for continuous monitoring of a
light source. The detector memory establishes the detector
limits and autoranging units to provide an immediate answer
in an easily understood format.
The INTEGRATE button selects the integration mode
that was last used, HI INTEG or LO INTEG. Pressing
the INTEGRATE button again during integration will reset
the integration register to start over at zero, while remaining
in the same mode. To select the alternate integration m