203M User Manual Publication No. 980978 Rev. A
Performance Test 3-2 Astronics Test Systems
Control Settings
Place the CAL-OPER switch to OPER, the SENSITIVITY switch to 1-11, the
SENSITIVITY DIAL to 10.0, the PEAK-RMS switch to RMS, the UNITS switch to
g’s, the FULL SCALE switch to 100, the INPUT switch to pC/g, the SE-DIFF
switch to SE, the OUTPUT mV/g switch to 10, and the LP FILTER SWITCH to
MED.
1. Connect a 139.9 ±0.5 Hz signal set for 707 ±4 millivolts RMS from the
PICOCOULOMB Output to the ACCEL INPUT jack at the rear of the
chassis.
2. Connect the AC Voltmeter to the NOR ACCEL OUTPUT jack on the rear
panel.
3. The indications on the Voltmeter should be 707 ±20 millivolts, and the front
panel meter will indicate 70.7 ±2 g’s.
4. Place the PEAK-RMS switch to PEAK.
5. The front panel meter will indicate 100 ±3 g’s.
6. Place the OUTPUT mV/g switch to 100.
7. The indication on the AC Voltmeter will be 10x the previous reading or
7.07 ±0.2 Volt.
8. Place the OUTPUT mV/g switch to 10. Set the SENSITIVITY DIAL for 1.0
and the FULL SCALE switch to 1000.
9. The indication on the front panel will be 1000 ±30 g’s.
10. Place the SENSITIVITY switch to 10-110, and the FULL SCALE switch to
100.
11. The indication on the front panel meter will be 100 ±3 g’s.
12. Place the SENSITIVITY switch to 1-11, and the DIAL to 10.0.
13. Connect the DC Voltmeter to the DC OUTPUT jack.
14. The indication on the DC Voltmeter will be 10.00 ±0.3 Volt.
15. Connect the AC Voltmeter to the VELOCITY OUTPUT jack and place the
UNITS to IPS. Set the generator frequency for 61.4 ±0.2 Hz.
16. The indication on the AC Voltmeter will be 0.707 ±0.02 VRMS, and the
front panel will indicate 100 ±3 IPS
17. Connect the AC Voltmeter to the DISPLACEMENT OUTPUT jack, and
place the UNITS switch to MILS. Set the generator frequency for 139.9
±0.5 Hz.
18. The indication on the AC Voltmeter will be 0.707 ±0.02 VRMS, and the
front panel will indicate 100 ±3 MILS.
19. Place the UNITS switch to g’s, depress the ALARM SET switch, and set
the ALARM adjust for an indication of 93 g’s.
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