HP HP 81531A User manual

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
0 40

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
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) 6 2.5% (1000-1650nm)
[1]
Total Uncertainty 6 5% 6 1.5pW (1000-1650nm)
[2]
Linearity (0 to -70dBm)
18

Cto28

C const. temp 6 0.015dB 6 1pW
0

Cto55

C const. temp 6 0.05dB 6 1.5pW
Noise < 1.5pW (1200-1600nm)
peak-peak, avg. time 1sec
Dimensions 75mm H, 32mm W, 335mm D (2.8 " 2 1.3 " 2 13.2 " )
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

C 6 5K.
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 6 1%.
Supplementary Performance 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: 6 10V.
HP 81531A Specications C-3