SHIMPO CAG-2000 1 Channel - Manual (Page 34)

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10.3 Indication above mastering range
(1) When the indication is above the mastering range, the instrument is excessive in
sensitivity. With the maximum master set in the measuring head, turn the sensitivity
adjustment knob counterclockwise so that the indication is returned from the
maximum master value by about 5 times the excess from the maximum master
value.
(2) Turn the zero adjustment knob counterclockwise to set the zero position at the
maximum master value.
Fig. 10-8. Adjusting for indication above mastering range.
ＺＥＲＯ
ＭＡＧ
ＧＡＧＥ
ENT
RST
SE T MAS
CA G
20 00
ＺＥＲＯ
ＭＡＧ
ＧＡＧＥ
ENT
RST
SE T MAS
CA G
20 00
1 3
SE T M AS
2
42
Excess of
22
µm
Maximum
master value
Turn to bring
indication to –90
Maximum master value – (Excess Ч 5)
= 20 – (22 Ч 5)
= –90
Turn to bring indication
to maximum master
value