Newport 1919-R User manual

www.newport.com
Newport Corporation
Laser Power/Energy Meter
User Manual
1919-R
1919-R
1919 - R

1919-R User Manual 1
Table of Contents
1Introduction................................................................................................................... 5
1.1 This Document............................................................................................................... 5
1.2 Related Documentation ................................................................................................ 5
1.3 Support .......................................................................................................................... 6
2Quick Reference............................................................................................................. 7
2.1 Getting Started .............................................................................................................. 7
2.2 Thermopile Sensors....................................................................................................... 8
2.2.1 Using 1919-R with Thermopile Type Sensors ....................................................8
2.2.2 Using 1919-R to Measure Laser Power..............................................................8
2.2.3 Using 1919-R to Measure Single Shot Energy ...................................................8
2.3 Photodiode Sensors....................................................................................................... 8
2.3.1 Using 1919-R with Photodiode Type Sensors....................................................8
2.3.2 Setting the Measurement Parameters ..............................................................9
2.3.3 Measuring Average Power or Exposure ............................................................9
2.4 Pyroelectric or Photodiode Energy Sensors .................................................................. 9
2.4.1 Using 1919-R with Energy Sensors ....................................................................9
2.4.2 Zeroing Instrument against Sensor..................................................................10
2.4.3 Setting the Measurement Parameters ............................................................10
2.4.4 Measuring Energy, Average Power, or Exposure ............................................11
2.5 Graphical Displays ....................................................................................................... 11
2.6 Math Functions............................................................................................................ 13
2.7 Logging Data to a File for Upload to PC....................................................................... 13
3Using the 1919-R Display Unit....................................................................................... 14
3.1 General Description..................................................................................................... 14
3.2 1919-R Display Unit Components................................................................................ 15
3.3 1919-R Hardware Components/Interfaces ................................................................. 16
3.3.1 Sensor Input.....................................................................................................16
3.3.2 LCD Display and Backlight................................................................................17
3.3.3 Soft Keys ..........................................................................................................17
3.3.4 Navigation Keys ...............................................................................................17
3.3.5 On-Off Switch/Backlight Control .....................................................................17
3.3.6 Charger Input...................................................................................................18
3.3.7 Analog Output .................................................................................................19
3.3.8 RS232 and USB Outputs...................................................................................20
3.4 1919-R Functions –Independent of Sensor Type ....................................................... 20
3.4.1 Instrument Settings .........................................................................................20
3.4.2 Field Upgrade –Updating the 1919-R Firmware.............................................23
3.4.3 Clock Settings...................................................................................................23
3.4.4 Zero Adjustments ............................................................................................24
3.4.5 Line Frequency.................................................................................................25
3.4.6 Language..........................................................................................................25
3.4.7 Measurement Screens (Graph Types) .............................................................26
3.4.8 Color Scheme...................................................................................................27
3.5 1919-R Screen Layout.................................................................................................. 29

1919-R User Manual 2
4Points to Consider ........................................................................................................ 30
5Thermopile Sensors...................................................................................................... 31
5.1 Operation of 1919-R with Thermopile Absorber Sensors ........................................... 32
5.2 Measuring Laser Power with Thermopile Sensors ...................................................... 32
5.3 Measuring Laser Energy with Thermopile Sensors ..................................................... 33
5.3.1 Measuring Pulses of Very Low Energy.............................................................34
5.3.2 Measuring Energy of Rapidly Repeating Pulses...............................................35
5.4 Measuring Laser Pulsed Power with Thermopile Sensors .......................................... 35
5.4.1 Pulsed Power Limitations ................................................................................36
5.5 Supported Models....................................................................................................... 36
6Photodiode Sensors...................................................................................................... 37
6.1 Operation of 1919-R with Photodiode Sensors........................................................... 38
6.2 Measuring Laser Power with Photodiode Sensors...................................................... 38
6.3 Averaging and Measuring Very Low Power Measurements ....................................... 40
6.4 Measuring Total Exposure........................................................................................... 40
6.4.1 Exposure Limitations .......................................................................................41
7Pyroelectric and Photodiode Energy Sensors................................................................. 42
7.1 Pyroelectric Sensors –Method of Operation.............................................................. 42
7.2 Photodiode Energy Sensors –Method of Operation .................................................. 42
7.3 Measuring Pulses of High Energy Density ................................................................... 43
7.4 Operation of 1919-R with Pyroelectric and Photodiode Energy Sensors.................... 43
7.4.1 Zeroing the Energy Sensor Against the 1919-R Meter ....................................44
7.4.2 Setting Measurement Parameters When Using Energy Sensors ....................44
7.4.3 Energy, Average Power, or Exposure Measurement.......................................46
7.4.4 Measuring Laser Energy...................................................................................46
7.4.5 Measuring Average Power...............................................................................47
7.4.6 Measuring Total Energy Exposure ...................................................................47
8Graphical Displays ........................................................................................................ 49
8.1 Display Settings............................................................................................................ 50
8.2 Bargraph ...................................................................................................................... 51
8.2.1 Modes ..............................................................................................................51
8.2.2 Zoom................................................................................................................52
8.2.3 Offset ...............................................................................................................52
8.2.4 Measuring Loss Using the dB Offset Function.................................................53
8.2.5 Bargraph Style..................................................................................................54
8.3 Analog Needle ............................................................................................................. 56
8.3.1 Modes ..............................................................................................................57
8.3.2 Persist ..............................................................................................................57
8.4 Line Graph ................................................................................................................... 58
8.4.1 Modes ..............................................................................................................58
8.4.2 Percentage Range (Y-Axis Scale)......................................................................59
8.4.3 Horizontal Sweep Time (X-Axis Scale) .............................................................59
8.4.4 Reset ................................................................................................................60
8.5 Statistics....................................................................................................................... 60
8.5.1 Modes ..............................................................................................................61

1919-R User Manual 3
8.6 Pass/Fail....................................................................................................................... 61
8.6.1 Modes ..............................................................................................................62
8.6.2 Upper/Lower Limits .........................................................................................62
8.7 Exposure (for Pyroelectric Sensors)............................................................................. 63
8.7.1 Modes ..............................................................................................................64
8.7.2 Manual/Timeout/Pulses ..................................................................................64
8.7.3 Exposure for Photodiode Sensors ...................................................................64
8.8 Pulse Chart................................................................................................................... 65
8.8.1 Modes ..............................................................................................................66
8.9 Other Display Settings ................................................................................................. 66
8.9.1 Show/Hide Settings .........................................................................................67
8.9.2 Color Scheme...................................................................................................67
9Math Functions ............................................................................................................ 70
9.1 Display on Main Measurement Screen ....................................................................... 70
9.2 Functions Screen ......................................................................................................... 71
9.3 Average........................................................................................................................ 71
9.4 Fixed Offset.................................................................................................................. 72
9.5 Scale Factor.................................................................................................................. 72
9.6 Normalize .................................................................................................................... 74
9.7 Density......................................................................................................................... 75
9.8 Function Limitations .................................................................................................... 76
10 Logging Data to a File for Upload to PC ......................................................................... 77
10.1 Launching the Log Setup ............................................................................................. 77
10.2 Setting Logging Parameters for the Various Stop Modes ........................................... 78
10.2.1 Manual Mode ..................................................................................................79
10.2.2 After Timeout ..................................................................................................80
10.2.3 After Measurements........................................................................................82
10.3 Start Logging................................................................................................................ 83
10.4 Displaying Logged Data ............................................................................................... 84
10.5 Viewing the Log File on Your Computer...................................................................... 87
11 Circuit Description........................................................................................................ 88
11.1 Analog Module ............................................................................................................ 88
11.1.1 Analog Circuit...................................................................................................88
11.1.2 Fast Analog Input.............................................................................................88
11.1.3 Analog Output .................................................................................................88
11.2 Processor Board........................................................................................................... 88
11.2.1 Power Supply ...................................................................................................88
11.2.2 EMI Protection.................................................................................................89
12 Calibration, Maintenance, and Troubleshooting............................................................ 90
12.1 Updating Sensor Calibration Factors........................................................................... 91
12.2 Calibration of Thermopile Sensors .............................................................................. 91
12.2.1 Surface Absorbers............................................................................................91
12.2.2 Volume Absorbers ...........................................................................................92
12.2.3 Linearity and Accuracy of Newport Thermopile Sensors ................................92
12.2.4 Updating Thermopile Sensor Calibration Factors............................................93

Introduction
1919-R User Manual 4
12.3 Calibration of Photodiode Sensors.............................................................................. 98
12.3.1 Method of Factory Calibration ........................................................................98
12.3.2 Accuracy of Calibration....................................................................................98
12.3.3 Updating Photodiode Sensor Calibration Factors ...........................................99
12.4 Calibration of Pyroelectric Sensors............................................................................ 100
12.4.1 Absorber Types Used in Newport Pyroelectric Measuring Sensors ..............100
12.4.2 Calibration .....................................................................................................101
12.4.3 Accuracy of Calibration..................................................................................101
12.4.4 Updating Pyroelectric Sensor Calibration Factors .........................................102
12.5 Error Messages .......................................................................................................... 104
12.6 Troubleshooting ........................................................................................................ 104
12.6.1 1919-R Meter.................................................................................................104
12.6.2 Thermopile Sensors, Energy Measurements.................................................104
12.6.3 Thermopile Sensors, Power...........................................................................105
12.6.4 Pyroelectric Sensors.......................................................................................105
12.7 Maintenance.............................................................................................................. 106
12.7.1 Maintenance of Thermopile Sensors.............................................................106
12.7.2 Battery Replacement .....................................................................................106
13 1919-R Specifications ..................................................................................................107
13.1 System/Meter Specifications..................................................................................... 107
13.2 Sensor Specifications................................................................................................. 109

1919-R User Manual 5
1Introduction
The Newport 1919-R is a microprocessor-based Laser Power/Energy Meter that provides a broad
range of measurements, displays, and data handling options. It operates with Thermopile,
Pyroelectric, and Photodiode sensors. Taking advantage of smart connector technology, it is easy-
to-use—simply connecting the sensor configures and calibrates the 1919-R to operate with that
sensor. The sensor configuration and calibration information is stored in an EEROM in the sensor
connector plug. This means that when the sensor is plugged in, 1919-R automatically identifies the
sensor type, calibration, and configuration. The user does not have to adjust anything.
The 1919-R’s 320x240 full color screen enhances measurement readouts in ways that simple
monochrome displays cannot. The 1919-R can graph power or energy versus time. It displays
power measurements in both digital and analog form simultaneously and also has a needle type
display. It will also autorange, so you do not have to set scales; or it can manual range if you wish.
It will remember what mode you were using before you turned it off and will return to that mode
when turned on. You can zoom in on the present reading, or subtract background. Although the
calibration information is stored in the smart connector, you can recalibrate from the screen and
store the new calibration in the sensor. You can also zero the 1919-R at the touch of a button.
1919-R is capable of logging data onto a USB Flash Drive (Disk On Key), as well as real-time
reporting of data via USB to Newport’s PMManager application to display and process the
information. 1919-R has RS232 capabilities as well. 1919-R also has the infrastructure for field
upgrading of the embedded software, should the need arise.
Above all, the 1919-R has advanced circuitry and digital signal processing for excellent sensitivity,
signal to noise ratio, accuracy, and response time. It also has special circuitry to reject
electromagnetic interference.
1919-R’s User Interface is intuitive. The keypad functionality is context-sensitive and functions
according to the needs of the present screen. Where necessary, on-screen help is provided as well,
so you should not have to refer to this manual very often.
1.1 This Document
This document covers everything you need to know to make full use of the 1919-R for all your
laser measurement needs. It includes a Quick Reference (Chapter 2) to allow you to perform basic
measurements immediately, without reading the whole manual.
1.2 Related Documentation
Newport takes pride in the wealth of laser measurement information that we provide including
FAQ’s, Catalogs, Spec Sheets, and more. Go to https://www.newport.com/Optical-
Meters/6770532/1033/section.aspx.

Introduction
1919-R User Manual 6
1.3 Support
If you have a question or require further assistance, contact Newport customer support:
North America
Europe
Asia
Newport Corporation Service
Dept.
1791 Deere Ave. Irvine, CA 92606
Telephone: [phone]
Telephone: [phone] x31694
Newport/MICRO-CONTROLE S.A.
Zone Industrielle
45340 Beaune la Rolande, FRANCE
Telephone: [phone]
Newport Opto-Electronics
Technologies (Wuxi) Co., Ltd
理波光电科技（无锡）有限公司
江苏省无锡市新区出口加工区
J3-8厂房 204028
Lot J3-8, Wuxi Export Processing
Zone, New District,
Jiangsu China 204028
Telephone: [phone]
Fax: [phone]

1919-R User Manual 7
2Quick Reference
This section provides a quick reference for performing basic measurements with the 1919-R Laser
Power/Energy Meter.
2.1 Getting Started
The 1919-R is equipped with "soft keys." That is, the functions of the keys change as indicated by
the legend above each key. It is also equipped with 4 navigation keys and a round Enter key in the
center.
To connect sensor to the 1919-R meter:
Insert the 15 pin D type connector of the measuring sensor cable into the socket
marked Sensor Input on the rear panel of the 1919-R meter.
To switch the 1919-R on:
1. To switch on, briefly press the On/Off/Backlight switch. The unit will switch on, and the display
will appear.
2. The backlight for the 1919-R’s LCD can be configured to toggle between full, half, and low
illumination. This toggling will be performed by briefly pressing the On/Off switch after the
1919-R has been switched on.
3. To switch the 1919-R off, press the On/Off switch and hold it for ~ 2 seconds until the display
blanks.
To set general instrument settings:
1. Disconnect the sensor. Use the Navigation keys to select the parameter to change and press
the Enter key. Change the setting with the Navigation keys. Press the Enter key to save.
2. RS232 Baud: Set baud rate for PC communication through its COM port.
3. Max An. Output: Set desired max analog output.
4. Language: Set to desired language.
5. Line Frequency: Set to 50Hz or 60Hz, depending on the electrical power grid of the area that
you are in.
6. Date and Time: Set to correct date and time.
The 1919-R automatically saves the current settings for next power up.
To zero the instrument:
1. Disconnect the sensor.
2. Make sure the instrument is not in an electrically noisy environment and is undisturbed.
3. Press Zero and Start. Zeroing takes about 30 seconds. Wait until “Zeroing completed
successfully” appears.

Quick Reference
1919-R User Manual 8
2.2 Thermopile Sensors
2.2.1 Using 1919-R with Thermopile Type Sensors
1. Plug in the Thermopile sensor. 1919-R will reconfigure itself to work with the attached sensor.
2. All of the sensor’s measurement parameters are shown on the main screen. Use the
Navigation keys to select and change the parameters.
3. Use the Navigation keys to select the parameter to change and press the Enter key. Change
the setting with the Navigation keys. Press the Enter key to save.
4. 1919-R saves the changes automatically for next startup of the instrument.
Warning: Do not exceed maximum sensor limits for power, energy, power density, and energy
density as listed in Sensor Specifications. Otherwise, there is a risk of damaging the absorber.
2.2.2 Using 1919-R to Measure Laser Power
1. Set Mode to Power.
2. Set Range to AUTO or one of the manual ranges. The correct manual range is the lowest one
that is larger than the expected maximum power of the laser.
3. Set Laser to the appropriate laser setting.
4. Set Average to the period you wish to average power over or set to NONE to disable.
2.2.3 Using 1919-R to Measure Single Shot Energy
1. Set Mode to Energy.
2. Set Range to the appropriate manual range. (In Energy mode, there is no autoranging.) The
correct range is the lowest one that is larger than the expected maximum pulse energy of the
laser.
3. Set Laser to the appropriate laser setting.
4. Set Threshold if you wish to change the energy threshold.
5. When the 1919-R screen flashes READY on and off, fire the laser.
2.3 Photodiode Sensors
2.3.1 Using 1919-R with Photodiode Type Sensors
1. Plug in the Photodiode sensor. 1919-R will reconfigure itself to work with the attached sensor.
2. All of the sensor’s measurement parameters are shown on the main screen. Use the
Navigation keys to select and change the parameters.
3. Use the Navigation keys to select the parameter to change and press the Enter key. Change
the setting with the Navigation keys. Press the Enter key to save.
4. 1919-R saves the changes automatically for next startup of the instrument.
Warning: Do not exceed maximum sensor limits for power, energy, power density, and energy
density as listed in Sensor Specifications. Otherwise, there is a risk of damaging the absorber.

Quick Reference
1919-R User Manual 9
2.3.2 Setting the Measurement Parameters
1. Set Range to the appropriate manual range, AUTO, or dBm (logarithmic scale). Note that
when selecting a manual range, the correct range is the lowest one that is larger than the
expected maximum power of the laser.
2. Set Laser to the appropriate laser setting. If the wavelength you want is not among the
wavelengths listed, select one and press the arrow key that is next to it to open the Modify
screen. Using the up/down Navigation keys to change each number and the right/left keys to
move to the next number, key in the wavelength you want. When finished, press the Enter
key.
3. Set Filter to IN or OUT as physically configured on the sensor. Not necessary for sensors with
built-in filter state detection.
4. Set Average to the period you wish to average power over or set to NONE to disable.
2.3.3 Measuring Average Power or Exposure
To measure average power:
1. Set Mode to Power.
2. Set measurement parameters as described above.
To measure exposure:
1. Set Mode to Exposure.
2. Set measurement parameters as described above.
3. Set Stop Mode to Manual or Timeout period.
4. Accumulated energy exposure will be displayed on the screen, as well as the elapsed time.
2.4 Pyroelectric or Photodiode Energy Sensors
2.4.1 Using 1919-R with Energy Sensors
1. Plug in the Pyroelectric/Photodiode energy sensor. 1919-R will reconfigure itself to work with
the attached sensor.
2. All of the sensor’s measurement parameters are shown on the main screen. Use the
Navigation keys to select and change the parameters.
3. Use the Navigation keys to select the parameter to change and press the Enter key. Change
the setting with the Navigation keys. Press the Enter key to save.
4. 1919-R saves the changes automatically for next startup of the instrument.
Warning: Do not exceed maximum sensor limits for power, energy, power density, and energy
density as listed in Sensor Specifications. Otherwise, there is a risk of damaging the absorber.

Quick Reference
1919-R User Manual 10
2.4.2 Zeroing Instrument against Sensor
For most accurate calibration, you should zero the energy sensor against the 1919-R it is being
used with:
1. Make sure the sensor is in a quiet environment and not subject to pulsed radiation.
2. Press Menu and select Instrument.
3. Press Zero and Start. Wait until “Zeroing completed successfully” appears.
2.4.3 Setting the Measurement Parameters
1. Set Range to the lowest one that is larger than the expected maximum pulse energy of the
laser.
2. Set Laser to the appropriate laser setting. If this sensor is a metallic type and if the wavelength
you want is not among the wavelengths listed, select one and press the arrow key that is next
to it to open the Modify screen. Using the up/down keys to change each number and the
right/left keys to move to the next number, key in the wavelength you want. When finished,
press the Enter key.
3. Set Pulse Length to the shortest time that is longer than the expected pulse length.
Warning: Incorrect readings will result if pulse length is not set up correctly.
4. For sensors with the diffuser option, set Diffuser to IN or OUT as physically set on the sensor.
5. Set Threshold as necessary to screen out false triggers due to noise.
6. Set Average to the period you wish to average power over, or set to NONE to disable.

Quick Reference
1919-R User Manual 11
2.4.4 Measuring Energy, Average Power, or Exposure
With the Pyroelectric sensor, you have been supplied a test slide with the same coating as on your
Pyroelectric detector. You can also obtain this slide from your dealer. You should use this slide to
test the damage threshold with your laser pulses. If the slide is damaged, then either enlarge your
beam, or lower the laser energy until damage is no longer seen.
To measure energy:
1. Set Mode to Energy.
2. Set measurement parameters as described above.
3. Energy will be displayed on the screen as well as the laser’s frequency.
To measure average power:
1. Set Mode to Power.
2. Set measurement parameters as described above.
3. Average power will be displayed as a function of “Energy x Frequency”on the screen as well as
the laser’s frequency.
To measure exposure:
1. Set Mode to Exposure.
2. Set measurement parameters as described above.
3. Set Stop Mode to Manual, Timeout period, or Pulse count.
4. Accumulated energy exposure will be displayed on the screen, as well as elapsed time and
number of pulses measured.
2.5 Graphical Displays
To present measurements on a graduated scale (bargraph):
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Bargraph. Return to the main display screen.
3. To expand the bargraph scale ±5x of the present reading, press the Zoom button. Press Zoom
again to return the bargraph to full scale.
4. To subtract the background and set the current reading to zero, press the Offset button. Press
Offset again to cancel.
To simulate an analog needle:
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Needle. Return to the main display screen.
3. To expand the needle graph ±5x of the present reading, press Zoom. Press Zoom again to
return the needle range to full scale.

Quick Reference
1919-R User Manual 12
4. To subtract the background and set the current reading to zero, press the Offset button. Press
Offset again to cancel.
5. Press Persist to keep older measurements on the screen and to display numerically the Min
and Max values measured. Press Persist again to cancel.
To graph laser output over time:
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Line. Return to the main display screen.
3. Set the percentage range of the scale to be displayed to the desired setting.
4. Set the horizontal sweep time as necessary.
5. Press Reset to clear the Min/Max tracking and to restart the graph.
6. This is especially useful to fine-tune the laser power.
To display real-time statistics:
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Statistics. Return to the main display screen.
3. Displays Maximum, Minimum, Average, Standard Deviation, Total Readings, and Number
Overrange.
4. To subtract the background and set the current reading to zero, press the Offset button. Press
Offset again to cancel.
5. Press Reset to clear the statistics.
To set pass/fail tracking:
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Pass/Fail. Return to the main display screen.
3. Press the Upper and Lower buttons to set tolerance limits. If reading is out of range, an
appropriate warning will be displayed on the screen.
To display readings as bars with lengths proportional to the measurement:
1. In Power or Energy mode, press Menu and enter Display.
2. Go to Graph Type and select Pulse Chart. Return to the main display screen.
3. Set the percentage range of the scale to be displayed to the desired setting.
4. Set the number of readings to display as necessary.
5. Press Reset to clear the Min/Max tracking and to restart the graph.
6. This is especially useful when measuring pulses of low frequency lasers.

Quick Reference
1919-R User Manual 13
2.6 Math Functions
To apply a fixed offset to measurements:
1. Press Menu and enter Functions. Go to Fixed Offset.
2. Set the value to subtract from all subsequent measurements.
To apply a Scale Factor to measurements:
1. Press Menu and enter Functions. Go to Scale Factor.
2. Set to value by which to multiply all subsequent measurements.
3. Useful when working with beam splitters.
To normalize against a reference measurement:
1. Press Menu and enter Functions. Go to Normalize.
2. Set to reference value by which to normalize all subsequent measurements.
To display as power/energy density:
1. Press Menu and enter Functions. Go to Density.
2. Select beam shape and size.
3. Measurements will be shown as cm².
2.7 Logging Data to a File for Upload to PC
You can log your measurement data to a file for upload to PC by connecting an external storage
device to the USB port of the 1919-R meter. For details, see Logging Data to a File for Upload to
PC.

1919-R User Manual 14
3Using the 1919-R Display Unit
This section describes the 1919-R display unit, its components, its functions independent of sensor
type, hardware functions, GUI, and keypad settings.
Topics include:
General Description
1919-R Display Unit Components
1919-R Hardware Components/Interfaces
1919-R Functions –Independent of Sensor Type
1919-R Screen Layout
3.1 General Description
The Newport 1919-R is a microprocessor-based Laser Power/Energy Meter that provides a broad
range of measurements, displays, and data handling options. It operates with Thermopile,
Pyroelectric, and Photodiode sensors. Taking advantage of smart connector technology, it is easy-
to-use—simply connecting the sensor configures and calibrates the 1919-R to operate with that
sensor. The sensor configuration and calibration information is stored in an EEROM in the sensor
connector plug. This means that when the sensor is plugged in, 1919-R automatically identifies the
sensor type, calibration, and configuration. You do not have to adjust anything. Sensors are hot
swappable. Even after the meter is switched on, you can remove one sensor and insert a different
one. 1919-R will recognize the switch and reconfigure itself according to the settings of the new
sensor.
The 1919-R’s 320x240 full-color screen enhances measurement readouts in ways that simple
monochrome displays cannot. The 1919-R can graph power or energy versus time. It displays
power measurements in both digital and analog form simultaneously and also has a needle type
display. It will also autorange, so you do not have to set scales; or it can manual range if you wish.
It will remember what mode you were using before you turned it off and will return to that mode
when turned on. You can zoom in on the present reading, or subtract the background. Although
the calibration information is stored in the smart connector, you can recalibrate from the screen
and store the new calibration in the sensor. You can also zero the 1919-R at the touch of a button.
1919-R is capable of logging data onto a USB Flash Drive (Disk On Key), as well as real-time
reporting of data via USB to Newport’s PMManager application to display and process the
information. 1919-R has RS232 capabilities as well. 1919-R also has the infrastructure for field
upgrading of the embedded software, should the need arise.
Above all, the 1919-R has advanced circuitry and digital signal processing for excellent sensitivity,
signal-to-noise ratio, accuracy, and response time. It also has special circuitry to reject
electromagnetic interference.
1919-R’s User Interface is intuitive. The keypad functionality is context-sensitive and functions
according to the needs of the present screen. Where necessary, on-screen help is provided as well,
so you should not have to refer to this manual very often.

Using the 1919-R Display Unit
1919-R User Manual 15
3.2 1919-R Display Unit Components
Figure 3-1 below displays the 1919-R display unit, displaying the main screen with some sample
measurements.
Figure 3-1 1919-R Meter/Display Unit –Front View
The 1919-R is equipped with:
LCD Display screen
Soft keys (under the display screen): The functions of the keys change as indicated by the
legend above each key. (The Menu key enables you to access Sensor, Display, Functions,
Instrument, Log, and Calibration settings. For sensor-specific details, see Thermopile Sensors,
Photodiode Sensors, Pyroelectric and Photodiode Energy Sensors.)
4 Navigation Keys and round Enter Key (under the soft keys, in the center of the unit)
Power On/Off/Backlight button

Using the 1919-R Display Unit
1919-R User Manual 16
Rear Panel with the following sockets: 12VDC, AN OUT, Sensor Input, RS232, USB OTG
Figure 3-2 1919-R Rear Panel
USB Port (on left side of the 1919-R meter)
Figure 3-3 USB Port (on Left Side) of 1919-R Meter
3.3 1919-R Hardware Components/Interfaces
This section describes the 1919-R hardware components and interfaces.
Topics include:
Sensor Input
LCD Display and Backlight
Soft Keys
Navigation Keys
On-Off Switch/Backlight Control
Charger Input
Analog Output
RS232 and USB Outputs
3.3.1 Sensor Input
The Sensor Input, located in the center of the 1919-R real panel, is the socket where you insert the
15 pin D type connector of the measuring sensor cable in order to connect the sensor to the
meter, as shown in Figure 3-4 below.
Figure 3-4 1919-R Rear Panel View

Using the 1919-R Display Unit
1919-R User Manual 17
3.3.2 LCD Display and Backlight
The 1919-R screen is a QVGA 320x240 pixel color TFT LCD. It can be driven in one of two full color
modes or in one.
The LCD backlight is actually a set of LEDs that illuminate the display from behind. Because the
1919-R uses a TFT color display, the backlight must be constantly on. It can be operated at full
intensity for full illumination; or at low or half-level to conserve power consumption
(recommended). The backlight level is toggled by a short press on the On/Off switch.
The 1919-R backlight consumes considerably less power than competing instruments, and
therefore it can operate from the battery even when the charger is not plugged in. Nevertheless,
since it does shorten the time between charges, it is recommended to set the backlight to less
than full intensity when the instrument is operated without the charger. (For further details, see
On-Off Switch/Backlight Control.)
3.3.3 Soft Keys
The Soft keys, located under the 1919-R screen, have functions defined by
the legend above each key. The legend usually indicates what will happen
when pressing the key. For example, if "Zoom" appears above a key, pressing that key will display
a zoom view of the screen. Some functions operate when the key is pressed and are canceled
when the key is pressed again. Those keys show reverse highlighting when operational. Pressing
the same key again cancels the operation and the highlighting.
Key Functions
The 1919-R has certain conventions as to the meaning of standard key strokes, including:
Highlighted item: The item that is presently active.
Menu: Provides access to Sensor, Display, Functions, Instrument, Log, and Calibration settings.
Start: Launches the active item.
Exit: Returns to the previous screen.
Cancel: Cancels the selection and returns to the previous screen, leaving the settings
unchanged.
3.3.4 Navigation Keys
The Navigation keys move to the next active item—left, right, up, and down. The round
button in the center is an Enter key to enter the screen of the item selected or when
finished, to leave that screen. Pressing the Enter key to leave the screen will save the
newly selected value for immediate use and will also save the change permanently.
3.3.5 On-Off Switch/Backlight Control
This section describes how to switch on/off the 1919-R and how to toggle the state of the
backlight.
To turn the 1919-R on:
Briefly press the On/Off switch (located under the Navigation keys, at the bottom
of the front panel). See Figure 3-1 above.

Using the 1919-R Display Unit
1919-R User Manual 18
The unit switches on, and the display appears. If no sensor is connected, the Instrument
Settings screen appears, displaying the configurations saved from the previous session (see
Instrument Settings). For example:
Figure 3-5 Instrument Settings Screen
If a sensor is connected, the appropriate default measurement screen will appear. For
example:
Figure 3-6 Needle Display with Persistence Enabled
To switch the 1919-R off:
Press the On/Off switch and hold it for ~ 3 seconds until the display blanks.
To toggle the state of the backlight of the 1919-R’s LCD:
Briefly press the On/Off switch after the 1919-R has been switched on. You can toggle
the backlight between full, half, and low illumination.
3.3.6 Charger Input
The 1919-R can be operated either by the internal battery or from an AC source with the charger
plugged in all the time. Plug the charger into the jack labeled "12VDC" on the rear panel (see
Figure 3-7 below). The battery will be charged at the same rate whether the 1919-R is switched on
or off, and whatever the backlight level. The battery will fully recharge in around 4-5 hours.

Using the 1919-R Display Unit
1919-R User Manual 19
Figure 3-7 1919-R Rear Panel View
Note: The charger circuit of the 1919-R is designed to allow the charger to be plugged in for an
extended period without causing damage to the battery.
The approximate time between charges is given in Table 3-1 below for various configurations:
Table 3-1 Sensor Charging Times
Sensor Type
Backlight Level
Time Between Charges
Thermopile and Photodiode
Low
19 hours
Thermopile and Photodiode
Half
17 hours
Thermopile and Photodiode
Full
15 hours
Pyroelectric
Low
16 hours
Pyroelectric
Half
15 hours
Pyroelectric
Full
13 hours
Note: Battery charge will be depleted faster if a USB Flash Drive (Disk on Key) is left plugged into
the 1919-R meter.
The battery charge is indicated by the icon. The battery charge is shown approximately by each
segment of the icon, for example, when 2 segments are shown, the battery is ½ full. When the
battery is charging, the segments turn on in sequence. When the battery is low, the charger should
be plugged in. While the unit will charge even while on and even with the backlight on, it will
charge fastest if the charger is left in while the unit is off.
3.3.7 Analog Output
The 1919-R provides an analog voltage output via the 2.5mm mono jack socket on the rear panel
marked “AN OUT” (see Figure 3-7 above). The 1919-R is supplied with the mating adapter plug
that connects to this socket. The analog output is useful for driving chart recorders and other
analog devices. The voltage is proportional to the reading on the display and scaled such that full
scale equals 1, 2, 5, or 10 volts as selected during setup.
To set the analog output voltage:
1. Use the up (↑) /down (↓) Navigation keys to select Max An. Output and press the Enter key.
2. Select the relevant voltage setting (1V, 2V, 5V, 10V).
3. Press the Enter key to exit this selection screen and save the new setting.
The analog output is driven through an impedance of 100ohm. For best accuracy, is recommended
to limit the external load to 100K (or larger). A smaller load (down to 1K) is possible, but may
result in loss of accuracy.