RTB Ring Torsion Load Cell

	RTB 0,25 t C3	RTB 0,5 t C3	RTB 0,25t C3 MR	RTB 0,50 t MR
SKU	VP4225901	VP4226101	VP4226001	VP4226201
Order number	V041086.B01	V041087.B01	V041086.B07	V041087.B07
Weight [kg]	1	1.05	0.83	1
HS-Code	8423 90 10	8423 90 10	8423 90 10	9031 80 20
Estimated Delivery Time [Weeks]	28	28	28	28
Accuracy	C3	C3	C3	C3
Capacity [t]	0.25	0.5	0.25	0.25
ATEX-Category	None	None	None	None
Product Family	SENSiQ Loadcell RTB	SENSiQ Loadcell RTB	SENSiQ Loadcell RTB	SENSiQ Loadcell RTB

Application
The load cell as transducer converts the mechanical input variable force proportionally into the electronic output variable voltage.
The specific model of the ring torsion load cell offers the user specific advantages:
• The extremely small frame size simplifies the use in almost all weighing device applications.
• The robust construction allows problem-free transport, installation and operation, also under rough ambient conditions (disturbance forces, temperature).

Design
• Hermetically sealed encapsulation through laser welding and  glass-metal implementation (IP68)
• Corrosion protection through the use of stainless steel
• All electrical components are located inside the load cell and thus are optimally protected.
• The high quality and robust connecting cable is guided radially into the load cell.
• Mechanically compatible with the RTK type series

Function
• High reproducibility
• High long-term stability and therefore consistently high accuracy permanently
• Extremely small measured value influence as a result of lateral forces
• High functional safety, even with frequently unavoidable impact loads and constraining forces, as well as with electrical interferences
• Torque-free force input/output as a result of the direct, vertical power train

Technical Data

Nominal load	Emax	0.13 t	0.25 t	0.5 t	0.5 t	–
Accuracy class		C3	C3	C3	C5	Ref
Nominal characteristic value	Cn	1 mV/V ±0.1 mV/V	1.75 mV/V 2 mV/V	±0.2 mV/V ±0.1 mV/V	2 mV/V ±0.1 mV/V	–
Compound error	Fcomb	±0.023 %	±0.023 %		±0.014 %	Cn
Return to zero signal after load (30 min)	Fdr	±0.0167 %	±0.0167 %		±0.0083 %	Cn
Creepage under load (30 min)	Fcr	±0.012 %	±0.0245 %		±0.0123 %	Cn, Btn
Hysteresis	–	±0.017 %	±0.0167 %		±0.0083 %	Cn, Btn
Temperature coefficient of the zero signal per 10 K	TK0	±0.008 % –	±0.014 % ±0.007 %		±0.009 % ±0.009 %	Cn, Btn Option MR
Temperature coefficient of the characteristic value per 10 K	TKc	±0.008 %	±0.01 %		±0.005 %	Cn, Btn
Max. allowed number of verifi- able division values	nLC	3000	3000		5000	–
Smallest scale interval	Vmin	Emax/17500 –	Emax/10000 Emax/20000		Emax/17500 Emax/17500	Standard Option MR
Minimum application range	Bamin	17 % –	30 % 15 %		40 %	Emax Option MR
Max. application range	Bamax	100 %				Emax
Maximum capacity *	Ll	150 %				Emax
Max. lateral load **	Lq	20 %				Emax
Input resistance	Re	1260 Ω ±100 Ω	1100 Ω ±100 Ω	1100 Ω ±100 Ω	1100 Ω ±100 Ω	–
Output resistance	Ra	1020 Ω ±0.5 Ω	1025 Ω ±25 Ω	1025 Ω ±25 Ω	1025 Ω ±25 Ω	–
Zero Signal	S0	1 %	1.5 %	1 %	1 %	Cn
Supply voltage	Us	max. 30 V (recommended: 5 V – 15 V)				–
Nominal temperature	Btn	-10 °C … +40 °C				–
Operating temperature range	Btu	-30 °C … +70 °C	-35 °C … +70 °C	-35 °C … +70 °C	-35 °C … +70 °C	–
Storage temperature range	–	-50 °C … +90 °C				–
Type of protection	–	IP68				–
Cable specification – Cable length 5 m, shield insulated from housing (0.13 t) or connected to –housing (0.25 0.50 t)
Connection assignment	–	Input +82: pink / Input -81: gray Output +28: brown / Output -27: white				–
Material	–	Stainless steel				–
Corrosion protection	–	see resistance table DDP8 483				–
Recommended tightening torque for the fastening bolts	–	8 N m	12 … 14 N m	12 … 14 N m	12 … 14 N m	–

* Permissible vibration stress according to DIN 50100: 70 % Emax; peak loading values may not exceed Emax.
** In combination with elastomer bearings, SEM must be observed that the reset force of the elastomer bearings already represents a transverse force.

ATEX approval

Only operate intrinsically safely	II 1G Ex ia IIC T4 Ga II 1D Ex ia IIIC T73°C Da
Not operated intrinsically safely	II 3G Ex nA IIC T4 Gc II 3D Ex tc IIIC T63°C Dc

Order numbers

Version [t]	Accuracy class C3	Accuracy class C5
0.13	V041085.B01	–
0.25	V041086.B01	–
0.50	V041087.B01	V041087.B05
0.25 MR	V041086.B07	–
0.50 MR	V041087.B07	–
Order numbers ATEX/IECEX version II 1G Ex ia IIC T4 Ga / II 1D Ex ia IIIC T73°C Da / II 3G Ex nA IIC T4 Gc / II 3D Ex tc IIIC T63°C Dc *
0.13	V041085.B11	—
0.25	V041086.B11	—
0.50	V041087.B11	V041087.B15