841p Usb
841p Usb
841p Usb
Power Meter
841-P-USB
User’s Manual
Warranty
Newport Corporation warrants that this product will be free from defects in
material and workmanship and will comply with Newport’s published
specifications at the time of sale for a period of one year from date of
shipment. If found to be defective during the warranty period, the product
will either be repaired or replaced at Newport's option.
To exercise this warranty, write or call your local Newport office or
representative, or contact Newport headquarters in Irvine, California. You
will be given prompt assistance and return instructions. Send the product,
freight prepaid, to the indicated service facility. Repairs will be made and the
instrument returned freight prepaid. Repaired products are warranted for the
remainder of the original warranty period or 90 days, whichever is longer.
Limitation of Warranty
The above warranties do not apply to products which have been repaired or
modified without Newport’s written approval, or products subjected to
unusual physical, thermal or electrical stress, improper installation, misuse,
abuse, accident or negligence in use, storage, transportation or handling. This
warranty also does not apply to fuses, batteries, or damage from battery
leakage.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
NEWPORT CORPORATION SHALL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES RESULTING
FROM THE PURCHASE OR USE OF ITS PRODUCTS.
First printing 2004
© 2004 by Newport Corporation, Irvine, CA. All rights reserved. No part of
this manual may be reproduced or copied without the prior written approval
of Newport Corporation.
This manual has been provided for information only and product
specifications are subject to change without notice. Any change will be
reflected in future printings.
Newport Corporation
1791 Deere Avenue
Irvine, CA, 92606 USA
P/N 41484-01 Rev. K
Declaration of Conformity
We declare that the accompanying product, the model 841-P-USB, identified with
the mark, meets the intent of the Electromagnetic Compatibility Directive,
2004/108/EC.
Manufacturer’s Name: Newport Corporation
Manufacturer’s Address: 1791 Deere Avenue
Irvine, CA 92606 USA
Mark Carroll
Sr. Director, Instruments Business
Newport Corporation
1791 Deere Ave, Irvine, CA92606 USA
Safety Information
Do not use the 841-P-USB if the device or the detector looks damaged, or if
you suspect that the 841-P-USB is not operating properly.
Appropriate installation must be done for water-cooled and fan-cooled
detectors. Refer to the specific instructions for more information. The user
must wait for a while before handling these detectors after power is applied.
Surfaces of the detectors get very hot and there is a risk of injury if they are
not allowed to cool down.
Note: This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, it is suggested to try to correct the interference by taking one or more
of the following steps:
Reorient or relocate the receiving antenna.
Increase the distance between the equipment and receiver.
Connect the equipment to an outlet that is on a different circuit than the
receiver.
Consult the dealer or an experienced radio/TV technician for help.
NOTE
The 841-P-USB is intended for use in an industrial laboratory environment. Use of these
products in other environments, such as residential, may result in electromagnetic compatibility
difficulties due to conducted as well as radiated disturbances.
SYMBOLS
Refer to the manual for specific Warning or Caution information to avoid any
damage to the product.
DC, Direct Current
This symbol on the product or on its packaging indicates that this product
must not be disposed of with regular waste. Instead, it is the user
responsibility to dispose of waste equipment according to the local laws. The
separate collection and recycling of the waste equipment at the time of
disposal will help to conserve natural resources and ensure that it is recycled
in a manner that protects human health and the environment. For information
about where the user can drop off the waste equipment for recycling, please
contact your local Newport Corporation representative.
Table of Contents
Warranty i
Technical Support Contacts iii
Safety Information iv
Waste Electrical and Electronic Equipment (WEEE) ...................v
1 General Information 1
1.1 Introduction ...................................................................................1
1.2 Unpacking......................................................................................1
1.3 Specifications ................................................................................2
1.4 Interfaces .......................................................................................3
2 System Operation 5
2.1 Getting Started...............................................................................5
2.2 Making a Measurement .................................................................5
2.3 Top Level Menu Structure.............................................................7
2.3.1 Display Menu ....................................................................8
2.3.1.1 Histogram.................................................................8
2.3.1.2 Tuning Needle..........................................................8
2.3.1.3 Status........................................................................9
2.3.1.4 Statistics ...................................................................9
2.3.2 Settings Menu..................................................................10
2.3.2.1 Wavelength Setting................................................10
2.3.2.2 Data Sampling Settings..........................................11
2.3.2.3 Corrections.............................................................14
2.3.2.4 Power Unit .............................................................15
2.3.2.5 Energy mode ..........................................................15
2.3.2.6 Trig Level ..............................................................16
2.3.2.7 Anticipation ...........................................................17
2.3.2.8 Attenuator ..............................................................17
2.3.2.9 Set Max Analog Out Range ...................................17
2.3.2.10 Analog Out Delay ..................................................18
2.3.2.11 Save As Default Layout .........................................18
2.3.2.12 Save and Load User Settings .................................18
2.3.3 Ctrl Menu.........................................................................18
2.3.3.1 Communication......................................................19
3 Command Reference 20
4 USB Installation and Upgrades 24
Verify COM Port.........................................................................25
4.1 Free Software and Firmware Upgrades.......................................25
5 Service Information 26
6 Appendix B 27
6.1.1.1 Recycling and separation procedure. .....................27
6.1.1.2 Separation: .............................................................27
6.1.1.3 Dismantling procedure:..........................................28
1.1 Introduction
To obtain the full performance from the 841-P-USB, we recommend that you
read this manual carefully.
The 841-P-USB is a microprocessor-based power meter that uses the latest
technology to provide a multitude of options in a user-friendly environment.
It is compatible with Newport’s 818 Series Low Power and the 818P Series
High Power Detectors. It is a complete power meter, providing the user with
everything from statistical analyses to data logging. Moreover, it can be
updated over the internet by connecting to a personal computer. The CD that
came with this meter contains an executable file that will transform your PC
screen into a virtual 841-P-USB power meter. See Chapter 2 for instructions
on getting started.
Easy software upgrades
Keep in touch with the latest improvements to our user-friendly software.
You can download the latest software versions anytime from our website
www.newport.com and install it on the 841-P-USB with the USB interface.
You will find all the necessary information on downloading and upgrading in
Chapter 4.
1.2 Unpacking
Each Newport 841-P-USB is thoroughly tested and calibrated prior to
shipment.
Visually inspect your 841-P-USB unit after removing it from the shipping
container. If you see any damage, retain all packaging materials and shipping
receipts. Any damage claim should be made promptly to the transportation
company. Notify the nearest Newport representative concerning the claim, so
that any repair or replacement can be arranged as soon as possible.
1.3 Specifications
The following specifications are based on a one-year calibration cycle, an
operating temperature of 18ºC to 28ºC (64ºF to 82ºF) and a relative humidity
not exceeding 80%.
Power Specifications
Power Range 1 nW to 10 kW
Physical Scale 2 V, 15 mV
Virtual Power Scales 3 nW, 10 nW, 30 nW, 100 nW, 300 nW, 1 µW, 3 µW, 10 µW, 30 µW, 100 µW,
(with 818 or 918D series 300 µW, 1 mW, 3 mW, 10 mW, 30 mW, 100 mW, 300 mW, 1 W, 3 W
detectors)
Virtual Power Scales 300 µW, 1 mW, 3 mW, 10 mW, 30 mW, 100 mW, 300 mW, 1 W, 3 W, 10 W, 30 W,
(with 818P detectors)
100 W, 300 W,1 kW, 3 kW, 10 kW
General Specifications
3 Hz numeric display
Display Rate
10 Hz graphic Displays
Data Displays Real-time, Histogram, Tuning Needle, Statistics
User Input Correction Factors 1 multiplier and 1 offset (7 digits floating point)
Analog Output 0 – 2.05 Volt, user defined, full scale, 1%
Weight 0.12 kg
1.4 Interfaces
7- Remove the detector’s protective cover and put the detector head into the
laser beam path. The entire laser beam must be within the sensor
aperture. Do not exceed maximum specified power or energy densities.
For the most accurate measurement, spread the beam across 60% to 80%
of the sensor area.
NOTES:
• Refer to specific power detector documentation for
complete installation and operating instructions.
2.3.1.1 Histogram
Right-click on the histogram to set the time period to view (Set X Axis…),
reset the display or select a scale. Note that the Auto-Scale on the histogram
starts from the lowest scale and only does scale-ups. This is made to select
the best scale for the user without frequent scale oscillations.
2.3.1.3 Status
The Status window displays the detector name and various settings.
2.3.1.4 Statistics
The statistics window displays the current statistics. See section 2.3.2.2 to
set the data sampling parameters and to start and stop the statistics.
To Activate the Statistics, select Statistics from the Ctrl menu, and then
select Start in the submenu. Statistics are stopped as a default.
The 841-P-USB starts compiling statistics on your measurements as soon as
the Statistics mode is activated. Select Stop in the same submenu to turn the
Statistics mode off. When you stop the statistics, the last values remain in the
statistics display window for you to view later. If you click Start again, the
841-P-USB will restart the statistics from zero.
The 841-P-USB uses default sample parameters unless you set them yourself.
Selecting Statistics in the Display menu opens the Statistics window.
To Set the Data Sample Parameters, select Data Sampling from the
Settings menu.
Often the Total Duration and Sample Period will be the same but the 841-P-
USB gives you the flexibility for any application. For example, with the 841-
P-USB you can see 5 minute averages of your laser performance as you
check it during the day and have it stop and hold the last 5 minutes worth of
statistics after 20 hours.
Minute
Hour
Day
Week
Total Duration Integer The time period for which samples are reported 1
1 to (to the display and output). Select a time period
1000000000 or a number of points [for example, report
statistics for 24 hours]. Often the total duration
and sample period will be the same.
The 841-P-USB automatically clears and
recalculates the statistics at the end of each
sample period unless you manually stop it.
Total Duration Continuous Sets the time period for the value entered above. Period
units
Periods To make the statistics stop after one sample
period, select “1” and “Period.”
Weeks
Days Minimum is 1 second.
Hours
Minutes
Seconds
Time Stamp Yes To have a time stamp appear with the data and No
No go directly to the exit mode, select “yes” by
pressing the down arrow key until “Yes”
appears on the screen, then press the right arrow
key.
Selecting “Yes” writes a time stamp with each
data point. This is a relative time stamp that
always begins with zero.
2.3.2.3 Corrections
The user can apply one Multiplier (or Correction Factor) and one Offset to
the detector reading. For Low Power Detectors, correction factors are used
when operating at a non-standard wavelength, as per above. However, when
using a High Power Detector, correction factors are most useful when
sampling a percentage of a powerful laser beam or correcting for absorption
along an optical path. The Status menu displays the values of correction
factors that are being applied to the measurements.
To activate the correction factor, select Corrections in the Settings Menu
and then select Multiplier or Offset. A dialog box opens where you enter
the correction value in percentage or as an absolute value. This number will
For example, if you are measuring a laser beam passing through the 99.9%
back reflector of a laser (giving 1/1000th of the real value), choose Multiplier
#1 and enter 1000 in the dialog box. The 841-P-USB will display the laser’s
actual power rather than the measured 0.1% sample on the main display.
When a correction factor is active the “Head” value will be different from the
displayed measurement. The corrected measurement appears in the top left
of the screen.
It is also essential to make sure that the actual measured value complies with
the power and energy limits of the detector head.
Note that the Statistics are computed for the corrected values only.
To disable the correction factor, re-select the Correction Factor (multiplier,
offset) in the Corrections submenu of the Settings menu. Then select
None in that submenu.
Allow at least 2 laser pulses for the auto scale to select the optimal scale for
your measurement.
This command is a toggle so a checkmark indicates when it is on. Select it
again to turn it off. The default is off.
Keep in mind that the 818P-Series High Power detectors are optimized to
sustain high average power, not high peak energy. Always keep the energy
density below the maximum energy density quoted in the manual for that
specific detector.
The single pulse energy measured in Energy Mode is precise to ±5% of the
power measurement calibration. This is larger than the uncertainty in the
power measurement (typically ±2.5%) because the energy calibration is
computed from the power measurement calibration.
ERRATIC TRIGGERING?
For a few detector heads, in electrically noisy environments, it is
possible that the 841-P-USB will inadvertently trigger on the noise.
In that case, increase the trigger level.
2.3.2.8 Attenuator
Some low-power detectors come with an attenuator for which there is an
attenuation factor programmed in the detector EEPROM. This menu item
makes it a simple operation to enable or disable the attenuator correction.
Since the calibration wavelengths are often different for the attenuator, the
user should always set the wavelength after enabling or disabling the
attenuator correction.
Figure 2.9 Dialog box to set the maximum analog output range
2.3.3.4 Statistics
-Select Start to start collecting statistics(when stopped) or to restart them
when already in progress.
-Select Stop to freeze the statistics. The default statistics state is stopped.
3 Command Reference
*ATT Turns the attenuator correction ON when available for the “ACK\r\r\n”
detector
*CAU Sends the data points through the serial port at a frequency of “9.793354e-01\r\r\n
10 Hz 9.792939e-01\r\r\n”
*ANT Turns the anticipation ON. ON by default & return caracters “ACK\r\r\n”
« ACK »
*NAM Returns the model of the head to the serial port “UP55N-400W-
H9\r\r\n”
*VER Returns the name of the software to the serial port “Version 1.14\r\r\n”
Please note that you must type the exact number of characters or numerical values required.
Example: *AOB1.00E+01 has 8 characters/numerical values. Don’t put any space
between characters or numerical values. You must type the star before the command.
Communication Settings
Plug the 841-P-USB into a USB port on the PC. If the PC supports USB 1.1,
Windows detects the new device and prompts you for the software drivers. A
window will open that says Found New Hardware – USB Device and after
several seconds to a minute, the Found New Hardware Wizard will appear.
Insert the Newport Software CD-ROM if not done already.
For Windows 2000, XP or Vista: Cancel the wizard and execute the Auto
installer “USB driver installer-r2” in the USB Driver folder from the CD-
ROM.
Please note that old monitor without the (R2) at the end of the product name
needs a different USB drivers which are available on our web site. They do
not support Windows VISTA, unless noted on our web site.
At the end of this process, a new serial COM port will be added to the list of
communication ports. It may be used as any other serial port. You will need
to know the COM port number to set up the serial connection to the 841-P-
USB.
5 Service Information
1 Monitor
1 USB cable.
1 Instruction manual
1 Calibration certificate
1 Software cdrom
6.1.1.2 Separation:
Paper : Manual and certificate.
Plastic: Monitor side enclosure.
Wires: USB cable.
Printed circuit board: inside the monitor.
Aluminum: Monitor enclosure
Remove
Nut Plastic
Protectors
Remove
Screws
Electronic
PCB inside
Newport Corporation
U.S.A. Office: 800-222-6440
FAX: 949/253-1479
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Description __________________________________________________________________________
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Internal #200708 Rev. K