Length Gauges with Very High Accuracy
  HEIDENHAIN-CERTO
   
   
 
   CT 60 Length Gauge CT 25 Length Gauge
Measuring standard DIADUR phase grating on Zerodur glass ceramic
Coefficient of linear expansion
atherm= (0 0.1) ppm/K
Grating period 4 m
Output signals   11 APP    Signal period 2 m
System accuracy* 0.1 m
0.05 m with length error compensation in the ND 281 display unit
0.1 m
0.03 m with length error compensation in the ND 281 display unit
Measuring range 60 mm (2.4 in.) 25 mm (1.0 in.)
* at 19 to 21 C; permissible temperature fluctuations during measurement: 0.1 K
   
 
CT 60
HEIDENHAIN-CERTO

HEIDENHAIN-CERTO
The CT 60 Length Gauge features a measuring range of 60 mm. It is used for incorporation into special measuring apparatus, calibrating and inspecting devices or special purpose machines, for example in conjunction with the monitoring and control of assembly and adjustment procedures.

A HEIDENHAIN-CERTO length gauging system comprises:

CT 60 Length Gauge,
ND 281 Display Unit
Control box
Gauge stand
Ceramic suction plate as support surface


Accuracy
The total error of the CT 60 over the entire measuring range of 60 mm lies within  0.1 m at ambient temperatures between 19 and 21 C and with temperature fluctuations of 0.1 K during measurement.

When the CERTO is used with length error compensation, e.g., in conjunction with the ND 281 Display Unit, HEIDENHAIN guarantees a total error of 0.05 m over the 60 mm measuring range.

 
CT 25
HEIDENHAIN-CERTO

HEIDENHAIN-CERTO
The CT 25 Length Gauge features a measuring range of 25 mm.

The high accuracy and measuring steps of 10 nm and less permit use of the CT 25 in gauge block calibration. Thanks to its generous measuring range — much larger than with inductive length gauges — the number of reference standard blocks required can be reduced significantly.


Accuracy
The total error of the CT 25 over the entire measuring range of 25 mm lies within  0.1 m at ambient temperatures between 19 and 21 C and with temperature fluctuations of 0.1 K during measurement.

When the CERTO is used with length error compensation, e.g., in conjunction with the ND 281 Display Unit, HEIDENHAIN guarantees a total error of 0.03 m over the 25 mm measuring range.

 

 
 

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