IR-860

High-Performance Energy Modulator

IR-860: High-Performance Energy Modulator

High-Performance Energy Modulator

The IR-860 Energy Modulator is a variable speed rotating disk chopper designed for use with radiation sources, including blackbody, tungsten filament, mercury lamps, Nernst glowers and as part of instruments where modulated radiation is needed. The IR-860 has been specially designed to integrate with the IR-563 & IR-564 Blackbody Sources. For other applications a table mount is available. The IR-860 Energy Modulator System consists of the Modulator head assembly and Modulator controller. The controller operates the motor, blade rotation, and speed of the modulation frequency. Interchangeable blades are available to allow modulation from 1.25 Hz to 45,000 Hz. The standard blade is an 8-slot blade with a frequency range from 10 to 1000 Hz.

Specifications

Compatible WithIR-563, IR-564 blackbodies
Spindle Speed75 – 7500 RPM
Warm Up Time1 hour for optimum stability
Stability0.5% of set frequency or 0.25% of full scale over 4 hours
ControlClosed-loop brushless DC with phase sensors
Meter IndicationChopping frequency in Hertz
Meter Accuracy± 1 digit
Reference Output0–5 V TTL, 600 Ω
Power Requirements200 W, 110 or 220 VAC, 50–60 Hz
Dimensions (Modulator)6.88" diameter (175 mm)
Dimensions (Controller)8.5" × 8" × 3.75" (216 × 203 × 95 mm)
Weight6.5 lbs (10 lbs shipped)
Blade Range1.25 Hz – 45 kHz (10 interchangeable blades)
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Available Configurations

Interchangeable Blade Types

The IR-860 uses 10 interchangeable blade types to cover the full frequency range from 1.25 Hz to 45 kHz. Select the blade that matches your application requirements.

Blade Frequency Range Number of Slots Slot Width @ Center Maximum Aperture
A 1.25–125 Hz 1 7.854" 1.0"
B 2.5–250 Hz 2 3.927" 1.0"
C 10–1000 Hz 8 0.982" 0.992"
D 30–3000 Hz 24 0.327" 0.327"
E 50–5000 Hz 40 0.196" 0.196"
F 100–10000 Hz 80 0.098" 0.098"
G 300–30000 Hz 240 0.0327" 0.0327"
H 62.5–6250 Hz 50 0.157" 0.157"
J 450–45000 Hz 360 0.022" 0.022"
K 3.75–375 Hz 3 2.618" 1.0"