Cristov Field Intensity Meter
Introduction
FIM-22 and FIM-41
DESCRIPTION: The Models FIM-22 and FIM-41 are portable field strength meters designed to provide precise, direct measurements of electro-magnetic fields in the 200 kHz to 5.0 MHz spectrum. These units include a receiver, integral shielded loop antenna, precision attenuator, internal calibration source, and battery power supply. With calibration accuracy traceable to the National Institute of Standards and Technology, the FIM-22 and FIM-41 meet the most exacting requirements of government and industry. Their hinged covers, on the rugged drawn aluminum cases, contain a loop antenna. Opening the cover to a vertical position connects the antenna terminals to the receiver via maintenance-free gold-plated contacts. An interlock switch prevents inadvertent battery discharge when the cover is closed.
SYSTEM OPERATION: A simplified calibration procedure assures measurement accuracy. Frequency is easily selected and observed on an illuminated dial. Tuning the receiver simultaneously tunes the calibrating oscillator to within a few kHz of the selected frequency. A separate control is used for vernier tuning. Proper gain calibration is precisely indicated by a sharp null on the meter when the gain control is adjusted for an exact balance between the detected outputs of the receiver and the calibrating oscillator. Field strength is displayed on the meter's logarithmic scale which is calibrated in increments from 1 to 10. Full scale meter sensitivity is determined by the attenuator range switch. Signal ratio (i.e., harmonic) measurements are easily resolved using the dB scale of the meter in conjunction with the 20 dB per step range switch.
KEY FEATURES
Contact Information:
POTOMAC INSTRUMENTS, Inc.
932 Philadelphia Ave.
Silver Spring, Maryland 20910
USA Telephone: 301.589.2662
Fax: 301.589.2665
Website: http://www.pi-usa.com