RADIANCE METER PHOTO RADIOMETER

DO9721 Radiance Meter, Photo radiometer.
DO9721 Datalogger Photo Radiometer Thermometer which performs photometric, radiometric, PAR, temperature measurements. Two inputs. Functions as datalogger: 30.000 samples, REL, Record, Q (integration), RS232C serial output.

DO 9721 quantum photo radiometer illuminance, radiance and thermometer data logger has been designed for measuring illuminance, irradiance, luminance and temperature.

The instrument has two inputs, A and B, and automatically recognizes the probes connected,
whether they be illuminance, irradiance, luminance or temperature probes, and can
display the difference between the two inputs.

As the probes are interchangeable, it is possible to choose the most suitable combination for all applications without having to recalibrate the instrument.

The DO 9721 is able to take illuminance measurements in lux and in fcd (foot-candle),
irradiance measurements in W/m² , in µW/cm² e in µmol/m² s, luminance measurements in
cd/m² and temperature measurements in °C or °F.

The instrument's Data Logger function enables it to store up to 30,000 readings.
The sampling period is variable from 1 second to 12 hours. 
The data acquired may later be transferred to a Personal Computer or a printer by means of the
opto-insulated serial line RS232C. For each value stored the date and time of acquisition are indicated; each acquisition block is ended with a report which provides the maximum, minimum and mean values. 
With the Serial Output function it is possible to obtain the instantaneous values measured by the instrument at the output of the serial line RS232C, in order to send them to a printer or a computer.
Other functions such as Hold (which blocks the display), Rel (for taking relative measurements), Record (for storing the maximum, minimum and mean values) and Q (integration in time of the measurements with alarm threshold) further enrich the instrument's performance. Thanks to its versatility and to its storage capacity, the instrument is suitable for a wide variety of applications, both in the field and in the laboratory.

PROBE CONNECTION

The instrument DO 9721 radiometer has two circular DIN 45326 8-pole connectors (A and B)
which allow the connection of probes for measuring temperature, type TP 870, and probes
for measuring the photometric and radiometric intensity, type LP 9021.
The probe model must be chosen to suit the specific application; see the section on
accessories.

Radiance Meter, Photo radiometer technical data.

Inputs / type of measurement 2: photometric / radiometric or temperature
Connector DIN 45326 8-pole
Measuring range
Photometric measurements 0...200.000 lux, 0...20.000 fcd, 0...2.000.000 cd/m2
Radiometric measurements 0...2000 W/m2, 0...200.000 µW/cm2, 0...200.000 µmol/m2s
Q energy depends on the active measurements unit
Integration time 19 hours, 59 minutes, 59 seconds
No. conversions per second 2
Working temperature -5...+50°C
Working relative humidity 0...90% R.H. (no condensation)
Serial output RS232C 300...19200 baud (galvanically insulated)
Display Double LCD 12.5 mm
Functions Auto power off / Autorange / Hold / Record /Maximum / Minimum / Mean / Relative / A-B /Energy
Memory 512kB (FLASH) corr. to 30,000 measurements
Power supply 9Vdc alkaline battery
Autonomy Approx. 30 hours (continuous duty)
Weight / dimensions 320 gr. / 215x73x38 mm

ORDER CODES
DO 9721K: Basic instrument kit, diplomatic carrying case, instrument, CP
RS232C serial connecting cable, 9V battery.
LP 9021 PHOT: Photometric probe for measuring light, ILLUMINANCE, photopic
filter complying with CIE, diffuser for correction according to the cosine law.
LP 9021 RAD: Radiometric probe for measuring the IRRADIANCE of artificial
light sources, irradiance of the sun.
LP 9021 PAR: Radiometric probe for measuring IRRADIANCE in the region of
PAR radiations (Photosynthetically Active Radiation); it works in the field of
the chlorophyll process following a special response curve.
LP 9021 UVA: Radiometric probe for measuring IRRADIANCE in the ultraviolet field.
Suitable for measuring radiation in the ultraviolet region A.
LP 9021 UVB: Radiometric probe for measuring IRRADIANCE in the ultraviolet field.
Suitable for measuring radiation in the ultraviolet region B.
LP 9021 UVC: Radiometric probe for measuring IRRADIANCE in the ultraviolet field.
Suitable for measuring radiation in the ultraviolet region C.
LP 9021 LUM6: Probe for measuring LUMINANCE, measuring range from 1 to
1999 x 103 candles/ m2. Measuring angle 6°. CIE filter for correction of the
response according to the human eye.
LP 9021 ERY: Radiometric probe for TOTAL EFFECTIVE IRRADIANCE (Weff/m2)
according to the UV action curve (CEI EN 60335-2-27) complete with
SICRAM module. Spectral range: 250 nm…400 nm, quartz diffuser for
cosine correction. Measurement range: 0.1⋅10-3Weff /m2 … 2000 Weff /m2.
LP BL: Stand for supporting and leveling probes, except for LP 9021 LUM6.
TP 870: Immersion temperature probe, Pt100 sensor, diam. 3x230 mm,
measuring range -50...+400°C.
TP 870/C: Contact temperature probe, Pt100 sensor, diam. 4x230 mm, measuring
range -50...+400°C.
TP 870/P: Penetration temperature probe, Pt100 sensor, diam. 4x150 mm,
measuring range -50...+400°C.
TP 870/A: Air temperature probe, Pt100 sensor, diam. 4x230 mm, measuring
range -50...+250°C.