Fluke Biomedical 190I - Manual (Page 11)

Introduction
Internal Controls
1
1-7
Use extreme care and ensure that you are properly
grounded prior to opening the unit for voltage
adjustments. Failure to comply could destroy the
instrument.
Display Contrast Adjustment (RP1)
The 190I display is designed for optimum viewing at approximately 60° from the plane of the display and
directed toward the bottom of the instrument. The Display Contrast Adjustment (RP1) is factory set for
optimum viewing and it is not recommended that it be further adjusted. However, if the display contrast
requires adjustment, turn RP1 to vary the angle of maximum contrast of the 16-character display. The
contrast for the upper part of the display is fixed. Refer to Figure 1-1 for RP1 location.
Figure 1-1. RP1 Location
CAUTION
+5 V Adjustment (RP2)
Display Contrast Adjustment (RP1)