Manufacturer of electronic instrumentation including signal conditioners, custom power supplies, computer controlled amplifiers and computer controlled signal conditioning instrumentation.

MODEL 144 ACCELEROMETER CONDITIONER

MODEL 144 ACCELEROMETER CONDITIONER

Description

The Model 144 is a compact vibration monitoring system consisting of two single-channel modules mounted in a 6”H x 8”W x 12”D portable case. Constant current excitation is provided for an accelerometer charge converter, whose signal is tightly filtered and monitored for exceeding a front-panel-set level. If the level is exceeded, relay contacts complete an external alarm circuit. A 4-20mA output also transmits the vibration level to other monitoring equipment. The Model 144  features three output modes: displacement output at discrete frequency, 3 1/2 digit readout  of RMS-DC output, and relay trip protection.
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Specifications

Input signal: Voltage output from accelerometer’s charge converter
Excitation: 4mADC constant current to charge converter; 24VDC compliance
Input sensitivity: Typically 50mV/g
Gain: Front panel switch selects pre-filter gains of 0.1, 1, or 10, with locking 10-turn scale adjustment pot for overall range of 0.1 to 200
Bandpass filter: Sharply tuned twin-tee filter at 120Hz (factory adjustable from 40Hz to 5kHz)
AC output: Acceleration signal, gained and 120Hz filtered (0-7VRMS max)
DC output: Jumper-selectable RMS/DC output (0-7VDC) or 4-20mA version of RMS/DC voltage
Display: 3 1/2 digit LED meter indicates RMS/DC output
Alarm level: Settable by front panel trimpot from 0.1-10VRMS
Alarm output: Front panel LED and one nonlatching form C (SPDT) relay contact operates on alarm condition
Power: Unregulated ±24V and +10V from rack-mounted supply
Carrying case: Two-module desktop case, Model 4017-107