HD2102 - 14 - V2.3
THE PROBES
The instrument works with photometric and radiometric probes of the LP471… series that measure:
• illuminance (LP 471 PHOT),
• irradiance (LP 471 RAD, LP 471 UVA, LP 471 UVB and LP 471 UVC),
• PAR (LP 471 PAR),
• luminance (LP471 LUM 2)
• effective irradiance according to the UV action curve (LP 471 ERY),
• effective irradiance in the spectral range of blue light (LP 471 BLUE),
• illuminance, UVA irradiance and UVA irradiance - illuminance ratio (combined probe
LP 471 P-A - please see note 1),
• total effective irradiance UVA + UV-CB according to the UV weighting curve (combined
probe LP 471 A-UVeff for measuring total effective irradiance in the range 250...400 nm -
please see note 1),
• global solar irradiance in the spectral range 400…1100 nm with silicon photodiode (LP 471
SILICON PYRA),
• global solar irradiance in the spectral range 300…3000 nm. Probe consisting of a second
class pyranometer LP PYRA 03 and cable with SICRAM module (LP 471 PYRA 03),
• global solar irradiance in the spectral range 300…3000 nm. Probe consisting of a first class
pyranometer LP PYRA 02 and cable with SICRAM module (LP 471 PYRA 02).
Note 1: the combined probes LP 471 P-A and LP 471 A-UVeff work with instruments HD2102.1
and HD2102.2 having firmware version respectively “HD2102.11” and “HD2102.21” and
following. On the back of these instruments a label shows version and date of the firmware. To
update previous instruments, you can use the "Update firmware" function of DeltaLog9.
All probes, except LUM 2, have an angular response according to cosine law.
Upon turning on the instrument automatically detects the probe connected to the input: it is
sufficient to connect it. If the instrument is already on, turn it off and back on again in order for the
probe to be detected.
The unit of measurement is determined according to the probe connected to the input: if a probe
has more units of measurement, use the UNIT key to select the desired unit.
In the combined probes, UNIT key allows to select one of the available measures (in these probes,
unit of measurement cannot be changed).
All probes are calibrated in factory; no calibration is required by the user.
In addition to instantaneous measurement the instrument calculates the time integral Q(t) of the
acquired measurement. Some thresholds can be associated with the integrated measurement and
with the integration time, which can be set in the menu. When exceeded, these thresholds cause the
instrument to stop the integral calculation.
The probe is detected during turn on, and this cannot be performed when the instrument is
already on, therefore if a probe is connected and the instrument is on, it is necessary to turn it
off and on.
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