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10. TROUBLESHOOTING
If any problems occur with your new Anti–Foam Module, do not attempt to perform any
service on the unit. Unauthorized servicing may void the warranty. Please contact your
local NBS Service Department or your local NBS distributor. In any correspondence
with NBS, please refer to the Model Number, Manufacturing Part Number and Serial
Number of your unit. This information is on the
ELECTRICAL SPECIFICATION PLATE
on
the left side panel of the unit.
Troubleshooting Table
Problem
Possible Cause
Solution
Anti–Foam Pump will not
turn ON
Anti–Foam Pump Mode is set
to OFF
Set MODE SWITCH to AUTO
SENS Adjustment is set
too low
Turn adjustment clockwise to
increase sensitivity
Conductance Probe connection
is open
Reconnect Conductance Probe Lead
between AF 2000 and Conductance
Probe
GRND connection to Vessel is
open
Reconnect GRND LEAD between
AF 2000 and HEADPLATE GROUND
POST
Foam conductivity is too low
Increase electrolyte concentration of
culture medium
Anti–Foam Pump will not
turn OFF
SENS Adjustment is set
too high
Turn adjustment counter-clockwise
to decrease sensitivity
Teflon coating on Conductance
Probe is damaged
Replace Conductance Probe
Agitation will not run
above
50 RPM
HIGH FOAM SENS Adjustment is
set too high
Turn adjustment counter-clockwise
to decrease sensitivity
Teflon coating on HIGH FOAM
Conductance Probe is damaged
Replace Conductance Probe
AF 2000 User’s Guide
