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MAINTENANCE
9. Calibration
9.1 CLOSED-BOX CALIBRATION
The DSP7000 features closed-box calibration. The advantage of closed-box calibration is that the
user does not have to disassemble the case or make mechanical adjustments.
9.2 CALIBRATION SCHEDULE
Calibrate the DSP7000:
• Afteranyrepairsareperformed.
• Atleastonceayear;morefrequentlytoensurerequiredaccuracy.
9.3 BASIC CALIBRATION PROCESS
The basic calibration process consists of procedures which must be performed in the following order:
(Depending on your hardware configuration some steps may not apply)
1. Initial Calibration Procedure (re initializes unit to default values)
2. TSC1 A/D Offset and Gain
3. TSC1 D/A Offset and Gain
4. TSC2 A/D Offset and Gain
5. TSC2 D/A Offset and Gain
6. IO Card 1 Channel 1 A/D Offset and Gain
7. IO Card 1 Channel 2 A/D Offset and Gain
8. IO Card 1 Channel 1 D/A Offset and Gain
9. IO Card 1 Channel 2 D/A Offset and Gain
10. IO Card 2 Channel 1 A/D Offset and Gain
11. IO Card 2 Channel 2 A/D Offset and Gain
12. IO Card 2 Channel 1 D/A Offset and Gain
13. IO Card 2 Channel 2 D/A Offset and Gain
14. Speed Check
15. Decimal Point Check
Items needed for calibrating the DSP7000:
• Externalvoltagereferenceof0to10voltsDC
• Digitalmultimeter(DMM)
Both instruments should have a VDC accuracy of 0.05% or better.
9.3.1 iniTial CaliBraTion proCeDure
1. Allow the DSP7000 to stabilize in an environment with:
• Anambienttemperatureof18°Cto25°C.
• Relativehumiditylessthan80%.
• PowerResistor250ohms50W.
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