YSI IQ SensorNet 2020 XT Terminal - Manual (Page 164)

What to do if ... System 2020 XT USB
7 - 4 ba76019e01 12/2012
7.2.3 Tips for clearing errors in the voltage supply
Note
Admissible values for the internal voltage supply (+U) are given in
section 8.1.
Supply voltage not
present or in the
warning or error range
Cause Remedy
– Number of power MIQ power
supply modules is not
sufficient
– Check power rating. If
necessary, install another
MIQ power supply module (for
details of how to do this, see
section 3.4.2 D
RAWING UP THE
POWER RATING ).
– Cable section is too long – Check length of the cable
section. If necessary, install
another MIQ power supply
module (for details of how to do
this, see section 3.4.3 E
FFECT
OF THE CABLE LENGTH ).
– Electrical connection
between MIQ power supply
module and component is
defective
(distributed mounting)
– Check cable connection step-
by-step starting with the
MIQ power supply module, and
replace defective cable
sections.
– Check contacts on the
MIQ modules (stack mounting).
Clean any dirty contacts.
Carefully bend back contact
springs that have been pressed
flat or bent (pay attention to
sufficient spring tension).
– Tighten all screws on the
terminals.