Kaman SMT-9700 - Manual (Page 2)

Kaman Aerospace Corporation PART NO: 860513-001
www.kamansensors.com Last Revised: 06/24/09
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Note that to maintain CE Marking of the SMT-9700, I/O cables are limited to 3 m or less in length.
The critical circuit voltages needed for operation of the SMT-9700 are internally regulated. Any
single ended DC voltage power supply that can furnish +15 VDC at 50 mA can be used. For high-
resolution applications, a linear power supply is recommended.
SMT-9700 Control Locations
A 3-channel configuration is shown above. Controls for channel B are in the same relative
location in the center of the PCB. Controls for channel C are in the same relative location at the
bottom of the PCB. For a single channel configuration, the center channel is used. For a dual
channel configuration, the two outside channels are used.
Adjustment and Calibration
Factory calibration is standard with the SMT-9700. Actual performance data is provided in a
calibration record sheet that is included with each unit. In the event a recalibration is necessary, the
unit can be returned to the factory, or user calibration can be performed. For best results, the SMT-
9700 should be powered on for a minimum of 15 minutes prior to adjusting the calibration.
A typical full-scale calibration is performed as follows:
1. Install the sensor in a micrometer calibration fixture and physically adjust the sensor to its
minimum distance to the target. This is its offset distance, the point at which minimum desired
output is obtained.
2. Adjust the Offset Control to obtain the desired output.
3. Move the target to its maximum distance from the sensor, based on desired sensor range.
4. Adjust the Gain Control until full-scale output (FSO) is obtained (10 VDC maximum).
5. Move the target back to the minimum distance and check output. Repeat steps 2-4 as necessary
until no additional adjustment is required.
6. After installation of the sensor, the Fine Offset Control can be used to adjust the offset ± 100 mV
without affecting the calibration performed in steps 2-4.
Fine Offset Control, Ch A
Offset Control, Ch A
Gain or FSO Control, Ch A