Fluke 77 - Manual (Page 30)

Maintenance
Cleaning
3
3-5
Clean the instrument case with a mild detergent and water.
The pca may be washed with isopropyl alcohol or deionized water and a soft
brush. Remove the display assembly and fuses before washing, and avoid
washing the switch if possible. Dry the pca with clean dry air at low pressure,
then bake it at 50
°
C for 24 hours.