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Measuring standard
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RELM: high accuracy ZeroMet spar scale with mid reference mark
Also available with end reference mark as RELE
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Readhead size (LxWxH)
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35 mm x 13.5 mm x 10 mm
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Scale pitch
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20 μm
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Thermal expansion coefficient at 20 °C
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0.75 ±0.35 μm/m/°C
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Accuracy grade at 20 °C
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Certified to ±1 μm per m, calibration traceable to International Standards
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Reference mark
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IN-TRAC reference mark
Various reference mark position options, see data sheet for details
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Limit switches
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Dual limits
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Scale length
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20 mm to 1 500 mm
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Maximum speed
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Up to 3.63 m/s
(See data sheet for details)
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Sub-Divisional Error (SDE)
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Typically <±10 nm
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Dynamic signal control
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Real time signal conditioning including Auto Gain Control (AGC), Auto Balance Control (ABC) and Auto Offset Control (AOC) for optimised performance across a range of operating conditions
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Incremental signals
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0.1 μm to 2.5 nm resolution
(See data sheet for details)
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Electrical connection
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0.5 m, 1 m, 1.5 m, 2 m and 3 m cable lengths with D-type connectors (9 and 15 pin) or circular in-line connector (12 pin)
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Power supply
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5 V -5%/+10%, typically <200 mA fully terminated
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Vibration (operating)
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100 m/s2 max @ 55 Hz to 2 000 Hz
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Shock (non-operating)
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500 m/s2, 11 ms, ½ sine, 3 axes
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Operating temperature (system)
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0 °C to +70 °
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Sealing
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IP40
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