To zero instrument:
1. Disconnect the sensor.
2. Make sure instrument is not in an electrically noisy environment and is
undisturbed.
3. Press “Zero” and “Start”. Wait until “Zeroing completed successfully”
appears. For more details, see main manual section 3.5.5.
2
Thermal Sensors
2.1. Use of 843-R with Thermal Type Sensors
To set type of laser being used:
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Laser is highlighted and press the Enter
arrow.
3. Select the appropriate laser wavelength and press the OK key.
4. This will be saved automatically as the laser setting to work with.
To choose manual or automatic ranging in power measurement:
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Range is highlighted and press the Enter
arrow.
3. Select the appropriate manual range or AUTO and press the OK key.
4. This will be saved automatically as the laser setting to work with.
To choose power or energy measurement:
In the main measurement screen press the Mode key. Select power or
Energy and press the OK key.
2.2. Other Settings and Saving the Startup Configuration
1. When measuring power, you can set the period over which to Average
the measurements.
2. When measuring energy you can set the threshold level in order to
screen out false triggers.
3. The present settings are automatically saved for the next time 843-R is
turned on.
2.3 Power or Single Shot Energy Measurement
Warning:
Do not exceed maximum sensor limits for power, energy, power density and
energy density as listed in tables 5 and 6 in section 9 of the main manual.
Otherwise, there is a risk of damaging the absorber.
To use the 843-R to measure laser power:
1. Press the Mode key and select Power. Press the OK key.
2. In the Setup screen Press the Down arrow until Range is highlighted
and press the Enter arrow. Select 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. Note that the range will be
displayed in the lower right corner of the main display.
To use the 843-R to measure laser energy:
1. Press the Mode key and select Energy. Press the OK key.
2. The energy mode is manual ranging. In the Setup screen Press the
Down arrow until Range is highlighted and press the Enter arrow. The
correct range is the lowest one that is larger than the pulse energy
measured. Note that the range will be displayed in the lower right
corner of the main display.
3. When the 843-R screen flashes "READY", on and off, fire the laser.
To select an analog needle type display for the 843-R:
Press the “Display” key. Select “Needle” and press the OK key. The
display will now show a simulated analog needle type display.
To expand the bargraph scale ±5x about the present reading:
1.
From the main power measurement screen press the "Zoom” button.
2.
Press the "Zoom” button again to return to the ordinary bargraph.
To subtract background and set current reading to zero:
1.
From the main power measurement screen press the "Offset” button.
2.
Press "Offset" again to cancel.
3
Photodiode Sensors
3.1. Selecting Chosen Wavelengths
To set type of laser being used:
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Laser is highlighted and press the Enter
arrow.
3. Select the appropriate laser wavelength and press the OK key.
4. If the wavelength you want is not among the wavelengths in the six
wavelengths listed press the Modify key.
5. Use the Right and Down arrows to adjust the wavelength as desired.
Then press the OK key.
To choose manual or automatic ranging or dBm in power measurement:
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Range is highlighted and press the Enter
arrow.
3. Select the appropriate manual range or AUTO (or dBm for logarithmic
scale) and press the OK key.
4. This will be saved automatically as the laser setting to work with.
3.2. Other Settings and Saving the Startup Configuration
1. You can set the period over which to Average the measurements.
2. You can set the removable Filter setting to OUT for more accuracy and
a wider wavelength range; you can set it to IN to measure higher
powers.
3. The present settings are automatically saved for the next time 843-R is
turned on.
3.3. Power Measurement
Warning:
Do not exceed maximum sensor limits for power, energy, power density
and energy density as listed in tables 5 and 6 in section 9 of the manual,
Sensor Specifications. Otherwise, there is a risk of damaging the
absorber.
To expand the bargraph scale ±5x about the present reading:
1.
From the main power measurement screen, press the “Zoom”
button.
2.
Press the “Zoom” button again to return to the ordinary bargraph.
To subtract background and set current reading to zero:
1. From the main power measurement screen press the "Offset” button.
2. Press "Offset" again to cancel. See Section 5.4.5 of the main manual for
details.
4
Pyroelectric or Photodiode Energy Sensors
4.1 Zeroing Instrument against Sensor
For most accurate calibration, you should zero the pyroelectric sensor
against the 843-R it is being used with. Proceed as follows:
Make sure the sensor is in a quiet environment and not subject to pulsed
radiation. Plug sensor into 843-R and turn on. Enter the Setup screen.
Press “Zero” and “Start”. Wait until “Zeroing completed successfully”
appears. For more details, see main manual section 3.5.5.
4.2. Changing Chosen Wavelengths
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Laser is highlighted and press the Enter
arrow.
3. Select the appropriate laser wavelength and press the OK key.
4. If the wavelength you want is not among the wavelengths in the six
wavelengths listed press the Modify key.
5. Use the Right and Down arrows to adjust the wavelength as desired.
Then press the OK key.
4.3. To Set Type of Laser Being Used
To set type of laser being used:
1. With the sensor attached, enter the Setup screen.
2. Press the Down arrow until Laser is highlighted and press the Enter
arrow.
3. Select the appropriate laser wavelength and press the OK key.
4. This will be saved automatically as the laser setting to work with.
