Rm-3700
Rm-3700
UniversalUniversal Radiometer
Radiometer
The Rm-3700 Universal Radiometer, when pairedwith the correct probe, can measure cw andaverage power (in Watts), as well as the energy (inJoules) of individual pulses up to 2 kHz, over awide range of intensities and wavelengths. A highspeed Rs-232 computer interface, full statisticalanalysis of pulse sets, battery/AC power, andaudible tuning are just some of the standardfeatures. This tremendous versatility makes it theideal instrument for research labs, universities,
hospitals, and other facilities with multiple lightsources and applications.
The front panel features a custom, two-color LCD
display, dual-use numeric/function keypad, andpower switch. The high-contrast, backlit LCD
exhibits excellent "readability" over a wide viewing
angle. The backlighting can be turned off for nolight measurements.

" Measure Both Power and Energy" 2 kHz Rs-232 Computer Interface" Battery and AC Power" Low Cost

The display consists of a 4 digit numeric readout ofthe power/energy with the appropriate
engineering notation units, a two-color bar graphwith the 75 - 100% portion in red, and various
enunciators that light when appropriate.
The Rm-3700 measures the true power of cw
sources and the average power of pulsed (orchopped) sources. The Background Cancel
function can be used to remove background noisefrom the measurement, leaving only the signal.
When activated it records a power level, which isthen subtracted from each subsequent
measurement until the feature is deactivated. The
power can be displayed in Watts or in dBm.
The Rm-3700 can measure the true integrated
energy of discrete pulses up to 2 kHz and pass it inreal time over the Rs-232 computer interface.
Further, Event Averaging allows the operator toconfigure a number of pulses (2 - 2,000 pulses/set)

23 WELLS AVE.

·UTICA,NY 13502 ·PHONE 315 797-4492·FAX 315 797-0696

to be collected and analyzed. After a set is finished theSTATS key toggles the display through the meanenergy, minimum energy, maximum energy, andstandard deviation. Other energy functions include
Single-Shot (capture-and-hold) mode and ExternalTrigger.

Other features common to both power and energy
m e a s u re m e n t i n c l u d e Wa v e l e n g t h S e l e c t a n dCorrection Factor (0.1 - 1.0). Wavelength Select loads
the appropriate spectral correction factor (probedependent), and Correction Factor can be used tocorrect the displayed power/energy for the transmission
loss of a filter or attenuator.
Rear panel features include the external power supply
connector, Probe connector, External Trigger BNC (forenergy measurement), Analog Output BNC, optional
Preamp Output BNC, and Rs-232 connector.
In power mode the Rs-232 updates with the front panel
display at 5 Hz. However, in energy mode it willtransmit energy data in real time up to 2 kHz. The Rs232 is fully bidirectional - all front panel commands are
duplicated via the computer interface.

Energy Measurement
Max. pulse width
Max. pulse rep rate
Resolution
Calibration factor
Ratio range
Ratio accuracy
Trigger selectAccuracy

250 ms (probe dependent)
2 kHz (probe dependent)
0.03% of full scale
0.100 to 1.000
1015 to 1 (probe dependent)± 2 LSD
Internal, External± 0.5%

Power Measurement
Resolution
Calibration factor
Ratio rangeRatio accuracy
Background subtract
Accuracy

0.05% of full scale
0.100 - 1.000
1015 to 1 (probe dependent)± 2 LSD
Up to Pmax of probe± 0.5%Outputs
Analog output

0 - 10 VDC, 10 volts equal full scale; thevoltage equals the mantissa in ratio mode
9600 - 115k baud; 8 data bits; parity N;
stop bits 1RS-232C
Operating Parameters
Power supply
Temperature range
Dimensions (l x w x h)
Weight4 NiCad "D" Cells
6 Volt Supply/Charger rated at 2000 mA
OºC to 40ºC operating; -20ºC to 70ºC
storage22.1 cm x 19.2 cm x 9.0 cm(8.7" x 7.6" x 3.6")
5.5 kg (12.0 lb)
8.690
REF.

3.700
REF.

T h e A n a l o g o u t i s 0 - 1 0 V D C , w i t h 1 0 Vo l t s
corresponding to full scale for the active range; thevoltage represents the mantissa in Reference Mode.
The Preamp Output shows the waveform after thepreamplifier; the baseline-to-peak amplitude is
proportional to the pulse energy.

7.530
REF.

The Rm-3700 is compatible with the following probes:

9VDC+POWER
RkP-400
RkT SeriesENERGY
RjP-400
RjP-600
RjP-700
RjT Series

Contact the factor y for additional infor mation
regarding probe compatibility and available options.

SPECIFICATIONS

Reference mode allows the Rm-3700 to behave as adual-channel instrument, by ratioing the measured
power/energy against a stored value. The reference
value can be captured or entered via the numeric
keypad.

The Rm-3700 is provided with a certificate ofcalibration showing traceability to the National
Institute of Standards and Technology (NIST) andcompliance with MIL-45662 and ANSI-Z540
Sections 7-18.

-PREAMPOUTOPTION3.520

ANALOG

EXTERNAL

OUT

TRIGGERPROBE

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REF.
MODEL/ID
LABEL

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RS-232C OPTIONAs a result of our ongoing commitment to product improvement specifications are subject tochange without notice.
REV 019801js