Possible Sources Of Errors - Cause And Removal - Thermo Scientific HM340E Operation Manual

Possible Sources of Errors – Cause and Removal
Problem
thick-thin-sections
compressions
"chatter" on sections
feed is not working, no
sections are produced
tight hand wheel, partly
tight hand wheel during
the entire handwheel
hand wheel will not turn
instrument cannot be
turned on
"?" displayed for 10
seconds
Note
In case of equipment failure and/or service work, please turn off the instrument and contact your local dealer.
Cause
blunt knife/blade
knife/blade angle unfavorable
clearance angle
insufficient clamping on specimen
clamping and/or knife/blade carrier
blunt knife/blade
specimen too warm
unfavorable clearance angle
cutting speed too high
cutting speed too high
unfavorable clearance angle
insufficient clamping on specimen
clamping and/or knife/blade carrier
front end position has been reached
coarse feed motor is blocked
debris and section waste between
microtome and base plate
dirty link block
the mechanical hand wheel brake is on
power cord not correctly connected
defective main fuse
Failure at linear potentiometer
Thermo Scientific Rotary Microtome HM 340E
Solution
move knife/blade or insert a new one
adjust knife/blade angle, until an optimal
angle can be found
check all screw and clamping connections
on specimen clamping and knife/blade
carrier.
Tighten them if necessary.
move knife/blade or insert a new one
cool specimen
try clearance angle adjustments until an
optimal angle can be found
turn hand wheel slower
turn hand wheel slower
try clearance angle adjustments until an
optimal angle can be found
check all screw and clamping connections
on specimen clamping and knife/blade
carrier. Tighten them, if necessary
move specimen backwards with the
course feed motor
contact a service technician
remove section waste and clean
microtome
contact a service technician
Release the hand wheel brake by lowering
the lever
check power cord
check/replace the fuses in the fuse box
call service
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