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Percussionaire® Digital Multimeter (PDM)
The Percussionaire® Digital Multimeter
(PDM) has six dierent operating modes:
Post, Wake, Active, Report, Sleep
and Fault.
NOTE: Do not install PDM until the POST check is complete and the screen is blank,
indicating Sleep mode.
Power-On Self-Test (POST) Mode
When batteries are installed in a system, the Percussionaire® Digital Multimeter (PDM)
software displays the software revision, battery voltage, total usage time and serial number
for 15 seconds. This Start-Up mode allows the software to perform additional tests on the
hardware that are part of the Power-On Self-Test. If any errors are detected the PDM enters
the Fault mode. It is required that the measurement port be left disconnected and exposed
to the atmosphere for the entire duration of the Power-On Self-Test.
Measuring port
connection
(Do not touch
or insert any
object into this
port)
Reset button
(only used
for rmware
upgrades)
Rear view of PDM
System Information Display