Yokogawa Single Channel Oxygen Analyzer System ZR22/ZR402 - Manual (Page 183)

IM 11M13A01-02E 11-12
11.2.3 Adjust LCD screen contrast
An LCD is built in the ZR402G converter. The contrast of this LCD is affected by its
ambient temperature. For this reason, the LCD is shipped, after adjusting the contrast so
as to become the most suitable in a room temperature(20-30
؇ C). However, when display
on the LCD is hard to see, adjust the LCD contrast by change the resistance of the
variable resistor; its position is shown in Fig. 11.8
Variable resistor
Figure 11.8