Powermeters and Interface Modules with Optical Head Error Messages
Agilent 8163A/B, 8164A/B, and 8166A/B User’s Guide, Fourth Edition 395
error message E1x081: TEC current to temperature mismatch
description If the TEC temperature difference does not correspond to the
measured Peltier current this test will fail
test value x refers to the module channel tested
action Verify whether the module is operated within the specified ambi-
ent temperature. If the failure persists, please return the unit to
your local service center for repair.