Metrohm Spectrosense - Manual (Page 42)

5 Appendix
38
Spectrosense, Instructions for Use
5.2.2 Carry out adjustment
Fig. 5 Spectrosense connections
• Dark voltage adjustment
Screw off the mirror.
Hold the tip of the Spectrosense in the air in a dark place. Pay atten-
tion not to hold the tip against a shiny surface. Now turn the counter-
sunk screw of the Dark voltage adjuster (4) very gently and try to
come as near as possible to 50 mV (ideal: 30 mV to 50 mV).
• Bright voltage adjustment
Screw the mirror back on the Spectrosense.
Immerse the Spectrosense into dest. water and turn the countersunk
screw of the Bright voltage adjuster (3) very gently. Try to come as
near as possible to 1000 mV but do not exceed the value 1200 mV
(ideal: 980 mV to 1020 mV).
3 Bright voltage adjuster
4 Dark voltage adjuster