SERIES 8000 MEASUREMENT MODULE

The KDM-8200 is the fundamental measurement module of the Series 8000 noncontact measurement system. Like all Series 8000 modules, the KDM-8200 is a 3U by 7T Eurocard module. The KDM-8200 measurement module contains the inductive bridge and signal conditioning circuits that produce the measurement output. This output is a linear voltage proportional to the physical displacement of the target relative to the sensor.

The KDM-8200 is used with the Series 8000 sensors.

KDM-8200 position measurement module

back to top

Technology:

• Inductive bridge.

Sensors:

• 14 standard (see specifications).

Electrical input:

• Voltage: ±15 Vdc.
• Current: <50 mA/side.
• Regulation: ±0.5 Vdc.

Signal out:

• User adjustable depending on sensor selection; ±5 V maximum.

Operating temperature:

• Sensor and cable: -67°F to +220°F (-55°C to +104°C).
• Electronics: +32°F to +122°F (0°C to +50°C).

Storage temperature:

• Sensor and cable: -67°F to +220°F (-55°C to +104°C).
• Electronics: -13°F to +185°F (-25°C to +85°C).

Size:

• One 7T slot wide.

SERIES 8000 SUMMATION/ COMPARATOR FUNCTION MODULE

The summation/comparator module has HI/LO limit comparators with latched opto-isolated or open collector outputs. It sums the analog displacement of two channels to provide one of three kinds of information.

1. Alignment or centering (A-B)
The A-B function is used to sense alignment by centering the target(s) between two sensors. A centered target produces an output of zero. A deviation of position produces a positive or negative output into engineering units of displacement.

2. Outside diameter (OD) or thickness, C-(A+B)
The value C represents the separation of two sensors and is constant. The values A and B are the distances from sensors A and B to the target. Two types of OD/thickness measurements are possible with the C-(A+B) function:

- absolute or total thickness of target;
- deviation from a nominal thickness.

3. Inside diameter (ID), C+(A+B)
As in the case of the OD measurement, C is the separation of the two sensors, and A and B are the distances from the two sensors to the target. The C+(A+B) function provides absolute ID, or deviation from a nominal ID.

SC-8000 summation/comparator module

back to top

Specifications

Channels:

• Single or dual.

 

Electrical input:

• Voltage: ±15 Vdc.
• Current: <50 mA each side.
• Regulation: ±0.5 Vdc.

Size:

• One 7T slot wide.

Frequency response:

• Flat to 30 kHz.

Phase response:

• 0° from 0 to 30 kHz.

Offset:

• Adjustable to zero.

Gain (for each channel):

• Unity gain ±1%.

Offset drift with temperature:

• 0.5 mV/°C.

Dynamic range:

• 90 dB.

Analog math functions:

• ±K[C±(A±B)]/N.

Standard function:

• C-(A+B) driving comparator.

Optional functions:

• One channel comparator only; math function only.

Temperature:

• Operating: +32°F to +122°F (0°C to +50°C).
• Storage: -13°F to +185°F (-25°C to +85°C).

SERIES 8000 DYNAMIC MODULE

The DY-8000 dynamic module converts dynamic time-varying signals to stable DC values. This function is necessary when the target is vibrating or rotating in applications such as shaft runout, bearing noise, ultrasonic weldhorn amplitude, acoustic noise, solenoid switching, etc.

The multi-function capabilities of this module allow dual-channels or combinations of the following conversions:

1. Positive peak conversions.
The positive peak function produces an output voltage equal to the maximum amplitude of an analog input voltage. This conversion provides the amplitude of a vibrating target.

2. Negative peak conversions.
The negative peak function produces an output voltage equal to the minimum amplitude of an analog input voltage. The lowest value could be the least positive or most negative input voltage.

3. Peak-to-peak conversions.
The peak-to-peak function produces an output voltage equal to the difference between the highest and lowest analog input signals. This conversion provides total indicated runout (TIR).

4. RMS-to-DC conversions.
This function computes the true RMS level of an AC sinusoid with DC offset, square wave, and Gaussian noise input, and converts this RMS value to a DC output voltage.

DY-8000 dynamic module

back to top

Specifications

Channels:

• Single or dual depending on selected output options.

Comparator hysteresis:

• 25 to 50 mV.

Adjustment range:

• 0 to 7 volts.

Bandwidth (-3 db point):

• >50 kHz (input dependent; contact factory).

Operating temperature:

• +32°F to +122°F (0°C to +50°C).

Input power:

• Positive current: 80 mA.
• Negative current: 30 mA.

Size:

• One 7T slot wide.

SERIES 8000 DUAL SET POINT FUNCTION MODULE

The dual set point function module allows the user to set voltage levels as HI and LO references. This card compares an input voltage from one or two sources to these references, and triggers three output responses based on this comparison.

When a HI or LO indicator is illuminated on the front panel, the HI or LO open collector output conducts current. External user-provided circuitry can convert this current into a voltage or digital logic. The GO state is the logic NOR of the LO and HI. This GO relay can be configured to be either ON or OFF while energized and opposite while de-energized. The DSP-8000 has two independent channels, each with HI and LO set points.

The most common application for the DSP-8000 module is a window comparator. When the input voltage of a window comparator is below the LO set point, the LO indicator will illuminate. When the input rises above the LO set point, the LO state turns off, and the GO indicator illuminates. As the input continues to rise above the HI set point, the GO state turns off and the HI indicator illuminates. The GO state can indicate in tolerance; the LO and HI states can indicate out of tolerance.

The DSP-8000 can provide progressive comparison indicating GO, ALARM, or SHUT DOWN. The module also features a part present/set point inhibit. This feature inhibits the HI, LO, and GO outputs.

DSP-8000 dual set point function module

back to top

Specifications

 

Channels:

• Single or dual.

 

Size:

• One 7T slot wide.

Output:

• Open collector transistors (2N2270) on HI and LO states (opto-isolated output transistors are available); relay on GO state, configurable as normally open or closed.

Relay current:

• 2 A at 24 Vdc.

Open collector current:

• 150 mA.

Comparator hysteresis:

• 10 to 30 mV depending on configuration and adjustment setting.

HI/LO transistor on time:

• <100 µsec.

HI/LO transistor off time:

• <800 µsec.

Relay on/off time:

• <4 milliseconds nominal.

Adjustable resolution:

• ±2 mV.

Adjustment range:

• -3.8 to +6.8 V standard.

SERIES 8000 VOLTAGE-TO-CURRENT CONVERTER MODULE

The VC-8000 converter module fits into the Series 8000 Eurocard rack, but can also be designed into custom measurement systems. The VC-8000 will provide an isolated output current loop.

VC-8000 voltage-to-current converter module

back to top

Specifications

Channels:

• Single or dual.

Electrical input:

• Voltage: ±15 Vdc.
• Current: 35 mA each side.

Signal in:

• 0 to 5 V standard; 0 to 10 and 0 to X volts optional.

Signal out:

• 4 to 20 mA standard; 0 to 20 mA optional.

Non-linearity:

• Tracks with input to ±0.05.

Input impedance:

• 25 kOhms (0 to 5 V range).

Common mode rejection @ 60 Hz:

• 90 dB.

Bandwidth:

• 400 Hz (small signal).

Drive capability:

• 0 to 100 Ohms load.

Temperature:

• Operating: +32°F to +122°F (0°C to +50°C).
• Storage: -13°F to +185°F (-25°C to +85°C).

Size:

• One 7T slot wide.