Measurement Computing Micro 488/EX rev.2.1 - Manual (Page 33)

Section 2 Getting Started
2.19
After installing the power supply connector into the interface, plug the power
supply into AC line power. Place the rear panel power switch in the ON [1] position.
All the front panel indicators should light momentarily while the Micro488/EX
performs an internal ROM and RAM self check. At the end of this self check all
indicators except POWER should turn off.
If there is an error in the ROM checksum, all of the LEDs will remain on.
Flashing LEDs indicates a RAM failure. Should such an error occur, turn the rear
panel switch to the OFF [0] position and retry the above procedure.
If the front panel indicators do not flash and the POWER indicator does not
remain lit there may not be any power supplied to the interface. In this event, check the
AC line and the rear panel connection of the power supply for proper installation. If the
problem is unresolved, refer to the Service Information section of this manual.
If proper operation is obtained, connect an interface cable to the rear of the
Micro488/EX [ 25-Pin Sub-D ]. Connect the other end to the host's serial port. Except
for connecting IEEE bus instruments, the Micro488/EX is installed and ready to use.
WARNING
The Micro488/EX makes its earth ground
connection through the serial interface cable. It
should only be connected to IEEE bus devices after
being first connected to the host. Failure to do so
may allow the Micro488/EX to float to a bus
device test voltage. This could result in damage to
the interface, personal injury or death.