MULTICHANNEL SIGNAL CONDITIONER MODEL 482C27 GENERAL OPERATION MANUAL
2
EQUIPMENT RATINGS
For complete specifications, please refer to the product spec sheet. This equipment operates optimally at +32 to +120°F
(0 to +50°C), in an environment having <85% relative humidity. The line power frequency range is 50/60 Hz.
482C27 requires 10-15 VDC with 500 mA to operate. The unit receives power from a supplied 12 VDC universal AC
power adaptor.
1-2.
Model 482C27 System Description
Model 482C27 is a four-channel, bench top signal conditioner that offers low noise operation and simplicity of use.
Each channel is selectable between several input types: Differential Voltage, Non-referenced Single Ended (NRSE),
Referenced Single Ended (RSE), ICP®, Voltage, Bridge (full, half and quarter). NOTE – NRSE and RSE input modes
are for 3-wire sensors that have separate power and signal output connections and a ground connection.
For NRSE, RSE, differential voltage and bridge modes this model offers up to 12 VDC unipolar or bipolar excitation
voltage. These input modes feature incremental gain of x0.1 to x2000, normalization, shunt calibration and AC/DC
coupling. In DC coupled mode, auto balance and auto zero functions automatically compensate the internal circuitry to
provide a zero based output.
The two main input modes for MEMS sensors are:
Differential Voltage
– Main use is with MEMS sensors that have a differential output. Sensor examples are PCB model
series 3501, 3503, 3641, 3651, 3741 and 3991.
Referenced Single Ended
– Main use is with MEMS sensors that have a single ended output. Sensor examples are PCB
model series 3711 and 3713.
The bridge inputs are compatible with full, ½ and ¼ bridge sensors. Internal switchable bridge completion resistors are
included in the unit (resistance value of 350Ω). The maximum current available is 30mA, with a current limit set at
40mA to prevent damage from inadvertent shorting.
For the ICP® inputs, the model offers up to 20 mA of constant current excitation to power ICP® sensors or in-line
ICP® charge converters. The ICP® and Voltage input feature incremental gain of x.1 to x200, normalization, and
AC/DC coupling. In DC coupled mode, an auto zero function is available to automatically compensate the internal
circuitry to provide a zero based output. In Voltage input mode current excitation is set to 0 mA (off).
Model 482C27 offers the following:
Compatible with PCB’s line of MEMS DC accelerometers (model series 3711, 3713, 3501, 3503, 3741, 3991)
Provides power for ICP® sensors
Compatible with full, ½, and ¼ bridge sensors
Suitable for conditioning any voltage input signals
AC/DC coupling selectable per channel
Auto zero and Auto balance functions
Gain of 0.1 to 2000 for bridge inputs
Gain of 0.1 to 200 for ICP®/voltage inputs
Keypad and menu-driven dot matrix display
Computer control via either RS-232 or Ethernet using the supplied PCB software
1-2.1 Model 482C27 ICP
®
Input/Output Mode
482C27 contains a regulated 24 VDC power supply that provides constant current for up to 4 individual channels. Both
the output and input connections utilize BNC connectors and are brought out through the rear panel. The 8-pin DIN
connectors are NOT used in ICP® mode.
