Section 5 - Maintenance
5.1 Calibration
This unit has been fine tuned and factory calibrated to give optimum 
performance over its full operating range for the input type you have selected 
by model number. It is recommended that the unit be returned annually for 
recalibration. 
CAUTION
:
Remove all electrical connections and power before attempting  
any maintenance or cleaning 
5.2 Cleaning
Lightly dampen a soft clean cloth with a mild cleaning solution and gently 
clean the benchtop controller.
5.3 Fuse Replacement
WARNING:
Disconnect all power from source before attempting fuse 
replacement.
CAUTION:
 
For continued protection against the risk of fire, replace fuses with 
only the  same size, type and rating indicated here and on the rear 
panel of your unit.
5.3.1 108 to 125 Vac, 50/60 Hz Models 
Controller Power Fuse:  1 each  F.250A, 250 VAC, (Fast-Acting, 0.250 Amp) 
(Front Panel) F1  UL./CSA/VDE APPROVED (5mm dia. x 20mm long).
Output Fuse:  2 each  F5A, 250 VAC,  (Fast-Acting, 5 Amp) 
(Rear Panel) F2, F3  UL./CSA/VDE APPROVED (5mm dia. x 20mm long).
8
Maintenance
5