PSC 2000781J MkII MLB Operating Procedure page 22

8.2 Stowing the Lightband
Step
Oscilloscope shall record voltage and current per the following requirements:
1. Sample rate: 1,000 Hz minimum
8.2.1
2. Voltage resolution: 0.2 V maximum
3. Current Resolution: 0.02 A maximum
Set up the 'Power and Measurement Circuit' portion of the Stow Test Circuit
per Figure 8-6.
8.2.2
Caution: If oscilloscope channels share common ground be cognizant of their
effect on the circuit.
Verify the resistance between the power source (PS) and Lightband connector
8.2.3
is less than 1.0 Ω for each motor. This applies to the complete loop (power and
return). Two methods are listed below.
a) Bypass the PS and measure resistance with a DMM from pins 2 to 3 (the
relay will need to be activated). Then repeat from pins 6 to 7.
b) Set the PS to 1 V and short pin 2 to pin 3. Apply power (by activating
relay) and view current draw. R= V/I. Then repeat, shorting pin 6 to pin 7.
Set up the 'Test Circuit' portion of the Stow Test Circuit per Figure 8-6 and
8.2.4
connect to the 'Power and Measurement Circuit'.
PSC Proprietary
Procedure
Figure 8-6: Stow test circuit
2000781J MkII MLB Operating Procedure
Date & Initials
Tech. QA
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