RMA Radial Force Measuring Axle

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Radial Force Measuring Axle

Ranges from 0 - 200 N to 0 - 1200 N

RMAsensors are used for direct tension measurement in moving webs ofpaper, films, foils, textiles or metals.The bearing journal supportsrolls with internal mounting. Measurement of the web tension is effectedby registering at both sides the radial bearing forces on a web guidingroll.

Defined and setpoint controlled web tension ensures high product quality and is the basis for a minimum of machine down-times.

The compact RMA sensors in connection with a web guiding roll fulfill 3 functions at once:

measurement of tension in the web
bearing of the shafts and rolls
guiding and deflecting the product web

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Features
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Direct, radial force transfer
High spring constants for the sensor permit high rotation speed ratings for the deflector roll
Nominal forces differing from standard
Advanced temperature range
Easy installation thanks to flange mounting
High precision and excellent long-term stability
Sensor housing and measuring cell made out of stainless steel, for use in humid environment

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Specifications
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Rated measuring ranges (FN)	N	0...100; 0...300; 0…600; 0...1200; 0…2000
Rated output	mV/V	0,7
Rated output tolerance	%	< ±0,2
Accuracy class		0,2
Accumulated error	% FN	< ±0,2
Excitation voltage max.	V	12
Reference excitation voltage	V	4,5
Input resistance	Ω	350 ± 3
Output resistance	Ω	350 ± 2
Isolation resistance	GΩ	> 5
Nominal temperature range	°C	0…50
Operational temperature range	°C	-10…70
Storage temperature range	°C	-30…90
Reference temperature	°C	23
Temperature influence per 10 K
- on the zero point (TK0)	% FN	< ±0,1
- on the calibration (TKC)	% FN	< ±0,2
Creep after 30 minutes	% FN	< ±0,1
Relative reversal error	% FN	< ±0,2
Service load	% FN	300
Ultimate load	% FN	400
Breaking load	% FN	> 500
Ultimate side load	% FN	300
Dynamic load limit (DIN 50100)	% FN	50
Axial torsional moment limit	Nm	35
Deflection at nominal force	mm	< 0,04
Natural frequency of the sensor	kHz	> 2
Weight	g	ca. 450
Surface protection	black-finished
Protection class	IP 54