User's Guide
HP 81531A Sensor Module
SERIAL NUMBERS
This manual applies to all instruments.
ABCDE
HP Part No. 81531-90011
Printed in Germany
Second Edition
E0796
Control Serial Number: Edition 2 applies directly to all instruments. Edition 1 : 1st May 1990 : 81531-90011 : E0590
1st September 1990 : 81531-90011 : E0990
Edition 2 : 1st September 1991 : 81531-90011 : E0991 1st September 1992 : 81531-90011 : E0992
1st December 1994 : 81531-90011 : E1294 1st July 1996: 81531-90011 : E0796
Safety Considerations
Before operation, you should review the instrument and manual, including the red safety page, for safety markings and instructions. You must follow these to ensure safe operation and to maintain the instrument in safe condition.
Initial Inspection
Inspect the shipping container for damage. If there is damage to the container or cushioning, you should keep it until you have checked the contents of the shipment for completeness and veri ed the module both mechanically and electrically.
The Performance Tests give procedures for checking the operation of the module. If the contents are incomplete, mechanical damage or defect is apparent, or if a moduke does not pass the operator's checks, notify the nearest Hewlett-Packard o ce.
Warning To avoid hazardous electrical shock, do not perform electrical tests when there are signs of shipping damage to any portion of the outer enclosure (covers, panels, etc.).
Power Requirements
The HP 81531A operates when installed into the HP 8153A Optical Multimeter mainframe.
Operating Environment
The HP 8153A safety information summarizes the HP 81531A operating environment ranges. In order for the HP 81531A to meet speci cations, the operating environment must be within the limits speci ed in this section.
Input/Output Signals
iii
Caution A maximum of 15V can be applied as an external voltage to any BNC connectors.
Storage and Shipment
The module can be stored or shipped at temperatures between 040 C and +70 C. The module should be protected from temperature extremes that may cause condensation within it.
iv
Contents
C. HP 81531A Speci cations
|
Supplementary Performance Characteristics . . . . . . . . . . . |
C-3 |
|
Analog output: . . . . . . . . . . . . . . . . . . . . . . . |
C-3 |
D. |
Performance Tests |
|
|
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . |
D-1 |
|
Equipment Required . . . . . . . . . . . . . . . . . . . . . |
D-1 |
|
Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . |
D-2 |
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Test Failure . . . . . . . . . . . . . . . . . . . . . . . . . . |
D-2 |
|
Instrument Speci cation . . . . . . . . . . . . . . . . . . . . |
D-2 |
|
Performance Test . . . . . . . . . . . . . . . . . . . . . . . |
D-3 |
|
Accuracy and Linearity Test . . . . . . . . . . . . . . . . . |
D-3 |
|
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . |
D-3 |
|
I. Accuracy Test . . . . . . . . . . . . . . . . . . . . . . |
D-4 |
|
II. Linearity Test . . . . . . . . . . . . . . . . . . . . . . |
D-5 |
|
III. Noise Test . . . . . . . . . . . . . . . . . . . . . . . . |
D-8 |
E. |
Cleaning Procedures |
|
|
The Cleaning Kit . . . . . . . . . . . . . . . . . . . . . . . . |
E-1 |
|
Other Cleaning Tools . . . . . . . . . . . . . . . . . . . . . |
E-3 |
|
Preserving Connectors . . . . . . . . . . . . . . . . . . . . . |
E-4 |
|
Cleaning Instrument Housings . . . . . . . . . . . . . . . . . |
E-4 |
|
Correct Cleaning Procedure . . . . . . . . . . . . . . . . . . |
E-5 |
|
Cleaning Cable Connectors . . . . . . . . . . . . . . . . . . |
E-5 |
|
Cleaning Connector Adapters . . . . . . . . . . . . . . . . . |
E-6 |
|
Cleaning Connector Interfaces . . . . . . . . . . . . . . . . |
E-6 |
|
How to clean instruments with a recessed lens interface . . . . |
E-7 |
|
Light dirt . . . . . . . . . . . . . . . . . . . . . . . . . |
E-7 |
|
Heavy dirt . . . . . . . . . . . . . . . . . . . . . . . . |
E-7 |
Index
Contents-1
Figures
D-1. |
Accuracy and Linearity Test Setup . . . . . . . . . . . . . . |
D-4 |
D-2. |
Addition of results (example) . . . . . . . . . . . . . . . . . |
D-7 |
Contents-2
C
C
HP 81531A Speci cations
Speci cations describe the instrument's warranted performance. Supplementary performance characteristics describe the instrument's non-warranted typical performance.
Because of the modular nature of the instrument, these performance speci cations apply only to this module. You should insert these pages into the appropriate section of the manual.
HP 81531A Speci cations C-1
C
HP 81531A Speci cations
Sensor Element |
In GaAs |
|
Wavelength range |
800-1700nm |
|
Power range |
+3 to -90dBm |
|
Display resolution |
|
|
dBm, dB |
0.001 |
|
|
0.0001 on printout |
|
|
||
Watt |
0.01 to 10 |
|
|
(depending on power range) |
|
|
|
|
Applicable ber type |
9/125 m - 100/140 m, NA 0.3 |
|
Uncertainty (Accuracy) |
62.5% (1000-1650nm)[1] |
|
Total Uncertainty |
65%61.5pW (1000-1650nm)[2] |
|
Linearity |
(0 to -70dBm) |
|
18 C to 28 C const. temp |
60.015dB61pW |
|
0 C to 55 C const. temp |
60.05dB61.5pW |
|
Noise |
<1.5pW (1200-1600nm) |
|
peak-peak, avg. time 1sec |
|
|
Dimensions |
75mm H, 32mm W, 335mm D (2.8"21.3"213.2") |
|
Weight |
net 0.6kg (1.3lbs), shipping 1kg (2.2lbs) |
|
Recalibration period |
2 years |
|
Warmup time |
20 min. |
Information on the traceability of power meters is available on request
[1]at the following reference conditions:
Power level 10 W (-20dBm), Continuous Wave (CW).
Fiber 50 m graded index, NA=0.2, fully excited.
Ambient temperature 23 C65K.
Connector Diamond HMS-10/HP.
At day of calibration (add 0.3% for aging over one year, add 0.6% over two years).
Spectral width of source <10nm.
[2]at the following operating conditions:
Fiber 50 m, NA 0.2.
For NA >0.2 add 1%.
C-2 HP 81531A Speci cations
C
Ambient temperature 0 to 55 C, non-condensing.
Within 1 year after calibration, add 0.3% for second year.
For Biconic Connector add 61%.
Supplementary P erformance Characteristics
Add 1% to total uncertainty for the full wavelength range.
Outside the speci ed wavelength range, the noise increases by up to 5 times the value shown above.
Analog output:
Bandwidth: DC, 300 to 400Hz, depending on range and sensor module. Output voltage: 0 to 2V into open.
Output impedance: 600 typical. Max. input voltage: 610V.
HP 81531A Speci cations C-3
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