THORLABS PDA8000-1 Manual de usuario

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Operation Manual

Thorlabs Instrumentation

PRO8000 (-4) / PRO800

Photo current module PDA8000

2012

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Version: 3.2

Date: 27.03.2012

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Contents Page

1General description of the PDA8000 2

1.1 Safety 2

1.2 Features 4

1.3 Technical data 5

1.4 Operating elements at the front of the module 6

1.5 Presettings 7

1.5.1 Offset adjustment 7

1.6 Connecting the photodiode 7

2Operating the PDA8000 8

2.1 Functions in the main menu 8

2.1.1 Display 8

2.1.2 Selecting a module 8

2.2 Functions in the channel menu 9

2.2.1 Display 9

2.2.2 Changing parameters 10

2.2.3 Selecting the polarity of the photo diode 11

2.2.4 Calibrating the photo diode 11

2.2.5 Setting the bias voltage 11

2.2.6 Switching on the bias voltage of the photo diode 12

2.2.7 Setting the measurement range 12

2.2.8 Measuring the forward voltage (option PDA8000-FWD) 13

2.3 Display error messages 13

3Communication with a control computer 14

3.1 General information 14

3.1.1 Nomenclature 14

3.1.2 Data format 14

3.2 Commands 15

3.2.1 Selecting the module slot 15

3.2.2 Selecting a port (PORT) 15

3.2.3 Calibrating a photo diode (CALPD) 15

3.2.4 Programming the forward current (IFWD) 16

3.2.5 Reading the photo diode current (IPD) 16

3.2.6 Switch the bias voltage on and off (PDBIA) 17

3.2.7 Select the photo diode polarity (PDPOL) 17

3.2.8 Reading the optical power (POPT) 18

3.2.9 Selecting the measurement range (RANGE) 18

3.2.10 Querying the module type 19

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3.2.11 Programming the bias voltage (VBIAS) 19

3.2.12 Reading the forward voltage (VFWD) 20

3.3 IEEE error messages of an PDA8000 21

3.4 Status reporting 22

3.4.1 Standard event status register (ESR) 23

3.4.2 Standard event status enable register (ESE) 23

3.4.3 Status byte register (STB) 23

3.4.4 Service request enable register (SRE) 24

3.4.5 Reading the STB by detecting SRQ 24

3.4.6 Reading the STB by "*STB?" command 24

3.4.7 Reading the STB by serial poll 24

4Service and Maintenance 25

4.1 General remarks 25

4.2 Troubleshooting 25

5Appendix 28

5.1 Warranty 28

5.2 Thorlabs “End of Life” policy (WEEE) 29

5.2.1 Waste treatment on your own responsibility 29

5.2.2 Ecological background 30

List of abbreviations 31

5.3 List of figures 32

5.4 Certifications and compliances 33

5.5 Copyright 34

5.6 Addresses 35

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We aim to develop and produce the best solution for your application in the

field of optical measurement technique. To help us to come up to your

expectations and develop our products permanently we need your ideas and

suggestions. Therefore, please let us know about possible criticism or ideas.

We and our international partners are looking forward to hearing from you.

In the displays shown by the PRO8 you may find the name PROFILE.

PROFILE was the name of the manufacturer before it was acquired by Thorlabs

and renamed to Thorlabs.

Thorlabs

This part of the instruction manual contains every specific information on how to

operate the photo current module PDA8000. A general description is followed by

explanations of how to operate the unit manually. You will also find every information

about remote control via the IEEE 488 computer interface.

Attention

This manual contains “WARNINGS” and “ATTENTION” label in this

form, to indicate dangers for persons or possible damage of equip-

ment.

Please read these advises carefully!

NOTE

This manual also contains “NOTES” and “HINTS” written in this form.

2 Safety

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1 General description of the PDA8000

1.1 Safety

 Attention 

All statements regarding safety of operation and technical data in

this instruction manual will only apply when the unit is operated

correctly.

Before applying power to your PRO8000 (-4) / PRO800 system, make

sure that the protective conductor of the 3 conductor mains power

cord is correctly connected to the protective earth contact of the

socket outlet!

Improper grounding can cause electric shock with damages to your

health or even death!

Modules may only be installed or removed with the mainframe

switched off.

All modules must be fixed with all screws provided for this purpose.

Modules of the 8000 series must only be operated in the mainframe

PRO8000, PRO8000-4 or PRO800.

All modules must only be operated with duly shielded connection

cables.

Only with written consent from Thorlabs may changes to single

components be carried out or components not supplied by Thorlabs

be used.

This precision device is only dispatchable if duly packed into the

complete original packaging including the plastic form parts. If

necessary, ask for a replacement package.

Safety 3

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 Attention 

Semiconductor laser modules can deliver up to several 100mW of

(maybe) invisible laser radiation!

When operated incorrectly, this can cause severe damage to your

eyes and health!

Be sure to pay strict attention to the safety recommendations of the

appropriate laser safety class!

This laser safety class is marked on your PRO8000 (-4) / PRO800

plug-in module or on your external laser source used.

 Attention 

Mobile telephones, cellular phones or other radio transmitters are

not to be used within the range of three meters of this unit since the

electromagnetic field intensity may then exceed the maximum

allowed disturbance values according to EN 50 082-1.

4 Features

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1.2 Features

Utmost precision

The single or dual channel photocurrent amplifier modules PDA8000 offer a

maximum of precision and sensitivity. The polarity of the photodiode is neverthe-

less free selectable.

Different operating modes

The photodiode may either be operated photovoltaic or photoconductive by setting

a bias voltage of 0 ... 10V.

7 measurement ranges

For a low noise measurement with 15 bit resolution plus sign there are seven

measurement ranges from 10 nA to 10 mA. The lowest, still detectable current is

about 0,1 pA (!)

Optical power measurement

Since the photocurrent amplifier modules can be calibrated by selecting the

photodiode sensitivity they can be used for precise optical power measurements

after calibration.

Forward voltage measurement (optional)

Optionally it will be possible to measure the forward voltage of the photodiode with

a selectable measurement current between 0.01 and 10 mA. (option PDA8000-

FWD).

Extensive filtering

The mains filter installed in the mainframe and the careful shielding of the

transformer, the microprocessor and the module itself will provide an excellent

suppression of noise and ripple.

Selecting the reference ground

Additionally the reference ground for the measurements can be adapted to the

measurement setup.

LabVIEW®- and LabWindows/CVI®-driver

For the PDA8000 Thorlabs supplies LabVIEW®- and LabWindows/CVI®-drivers for

MS Windows 32.

Please refer to our homepage for latest driver updates.

http://www.thorlabs.com

Technical data 5

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1.3 Technical data

(All technical data are valid at 23 ± 5°C and 35 ±15% humidity)

Photocurrent amplifier module PDA8000-1(2)

General data

Photodiode current range 10 nA ... 10 mA1)

Resolution 16 bit

Polarity of photodiode selectable

Setting range of bias voltage (can be switched off) 0.1 V ... 10 V

Setting range of the photodiode coefficient 0.001 ... 5.000 A / W

Temperature coefficient 50 ppm/K

Input impedance 0(virtual ground)

Operating temperature 0 … + 40°C

Storage temperature - 40 … + 70°C

Forward voltage measurement for channel 1 (opt. PDA8000-FWD)

Measurement technique 2-wire technique

Measurement current 0.01 ... 10 mA (5%)

Measurement range UFWD 0 ... 2 V2)

Resolution 0.3 mV

Accuracy ± 5 mV

Connectors

Photodiode BNC

Measurement ranges

Current range Resolution Accuracy

10 mA 0.1 A 0.025 % f.s.

1 mA 10 nA 0.025 % f.s.

100 A 1 nA 0.025 % f.s.

10 A 0.1 nA 0.025 % f.s.

1 A 10 pA 0.025 % f.s.

100 nA 1 pA 0.250 % f.s.3)

10 nA 0.1 pA 0.800 % f.s.3)

1other ranges on request

2reduces to 0 ... 1 V for IFWD > 8 mA

3higher accuracy can be reached by repeated measurements

6 Operating elements at the front of the module

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1.4 Operating elements at the front of the module

LED SELect

LED error

Connector jack input 1

Offset adjust input 1

Connector jack input 2

Offset adjust input 2

Figure 1 Operating elements on the PDA8000-2 front panel

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