Installation
8-3
Figure 8-1. Main PCB Board LED Locations
Safety:
1. Has the secondary ground wire been attached to the
78581B? If “No” proceed to step 2
2. Attach secondary ground if missing or visually
inspect ground connections at both ends of the
attached secondary ground, then proceed to step 3.
3. Confirm that all locations for all connected
branches are at the same ground potential.
Procedure: Measure the voltage between the ground
coming through the SDN wall box and the third wire
ground of each instrument’s wall outlet (power outlet).
The value should be less than or equal to 0.5V RMS.
-OR-
Perform Safety (1) test on all the connected devices.
• If “yes”, done and record S: P.
• If “no”, proceed to step 4.
4. Look at all bedsides for either an attached
secondary ground wire or a M1965A potential
separator connected to each bed where the voltage
was greater than 0.5V RMS.
• If “yes”, done and record S: P.
• If “no”, proceed to step 5.
5. Install secondary ground wire to bedside for any
connection where the ground potential was greater
than 0.5 V RMS.
Done and record S: P.
Expected answer
is passed
S:P or S:F
Where P=Pass and
F=Fail.
Test Block
Name
Test or Inspection to Perform
Expected Test
Results
What to Record on
Service Record
DS1 DS2 DS4DS3 DS8 DS7
DS5
DS6
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