PSC 2000781J MkII MLB Operating Procedure page 34

Step
Set the power supply voltage at 24 to 32 V
10.1.5
minimum voltage as this maximizes the Lightband's operating life and verifies
worst-case torque margin.
Set the current limit on the power supply to 6.5 ± 0.1 A.
10.1.6
Set the timer relay to apply power for 0.50 ± 0.05 s.
10.1.7
Adjust Oscilloscope to properly capture all channels. Verify
10.1.8
1. Voltage scale (V/div) on Ch. 1 & 3
2. Current scale (A/div) on Ch. 2 & 4
3. Current probe scale matches oscilloscope (V/A) on Ch. 2 & 4
4. Current probes are zeroed
5. Vertical trigger level and channel (Ch. 1 recommended)
6. Horizontal trigger position
7. Horizontal time scale (s/div) will capture entire duration
Turn on the power supply output. Then activate the timer relay. Verify the
10.1.9
following:
1. Voltage and current were recorded per step 10.1.1
2. Measured voltage meets requirement in step 10.1.5
3. Measured current value is approximately 1/10
value
4. Timer relay applies power per step 10.1.7
5. Data saves and is readable on a computer
If any parameters are not met, make the required changes and re-run the
test circuit. Upon completion of this step, the 'Power and Measurement
Circuit' shall not be changed.
The Upper Ring shall be constrained during deployment. If separating
10.1.10
(allowing the Separation Springs to fully extend) skip to step 10.1.11. If
separating is not required, a force shall be applied to restrain the Upper Ring.
Apply a compressive force on the Upper Ring per the calculations below.
Separation Spring quantity = ________
Minimum Compressive Force = ____Springs x 20 lb = _____lb
Maximum Compressive Force = ____Springs x 30 lb = _____lb
Offload any object heavier than the maximum compression force.
Once this step is complete, skip to step 10.1.12.
If separating (allowing the Separation Springs to fully extend) it is required to
10.1.11
constrain the Upper Ring after the Separation Springs reach end of stroke.
2000843 Deploy Upper Ring Stops or similar shall be used. See Section 15.
If using Deploy Upper Ring Stops, follow PSC procedure 3000272 for
installation and removal instructions.
Another option is to allow the Lower Ring to drop onto a soft, high-damping
foam (ensure re-contact with Upper Ring is not possible). The foam shall be
covered to prevent debris contamination of Lightband. To prevent Lightband
damage, drop distance and energy damping shall be considered.
PSC Proprietary
Procedure
. When possible use the
DC
th
2000781J MkII MLB Operating Procedure
of applied voltage
Date & Initials
Tech. QA
Page 34 of 50