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HEIDENHAIN-SPECTO

Thanks to their quite small dimensions, the HEIDENHAIN-SPECTO length gauges are the product of choice
for multipoint inspection apparatus and testing equipment.

Mechanical Data	ST 1208 ST 1278 ST 1288	ST 3008 ST 3078 ST 3088	ST 1207 ST 1277 ST 1287	ST 3007 ST 3077 ST 3087
Plunger actuation Plunger position at rest	By measuring object Extended		Pneumatic Retracted
Measuring standard	DIADUR phase grating on glass; grating period 20 µm
System accuracy	± 1 µm
Measuring step	1 µm/0.5 µm
Reference mark	Approx. 5 mm below upper stop
Measuring range	12 mm	30 mm	12 mm	30 mm
Gauging force Vertically downward Vertically upward Horizontal	0.6 to 1.8 N 0.4 to 1.6 N 0.5 to 1.7 N	0.7 to 1.4 N 0.3 to 1.0 N 0.5 to 1.2 N	0.4 to 3.4 N dep. on pressure and operating attitude	0.4 to 2.4 N dep. on pressure and operating attitude
Permissable radial force	≤ 0,8 N
Operating attitude	Any
Vibration (55 to 2000 Hz) Shock (11ms)	≤ 100 m/s² (IEC 60 068-2-6) ≤ 1000 m/s² (IEC 60 068-2-27)
Protection	IP 64
Operating temperature	10 to 40 °C; reference temperature 20 °C
Mounting	Clamping shank Ø 8h6
Weight (without cable)	40 g	50 g	40 g	50 g

HEIDENHAIN-SPECTO ST 12xx

Output signals:

ST 120x	11 µA_PP	Signal period 20 µm
ST 127x	TTL	Signal period 2 µm / 4 µm
ST 128x	1 V_PP	Signal period 20 µm
Measuring range 12 mm

HEIDENHAIN-SPECTO ST 30xx

Output signals:

ST 300x	11 µA_PP	Signal period 20 µm
ST 307x	TTL	Signal period 2 µm / 4 µm
ST 308x	1 V_PP	Signal period 20 µm
Measuring range 30 mm



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