BLH NOBEL / Z-BLOK Weigh Module

Z-BLOK Weigh Modules are specifically designed to meet the requirements of inventory and process weighing applications. Checkless design (no stay or check rods), low profile, and uniform bolt spacing simplify installation on new or existing vessels. The integral expansion assembly, double cantilever design, and temperature compensated full bridge transducer, minimize temperature effects allowing accurate measurement indoors or out, in virtually any environment. The ANSI/ASCE qualified design provides an efficient balance between performance as a transducer and strength as a structural member when earthquakes or wind resistance is a structural design requirement. Sideloads of up to 100% full scale capacity, caused by mixer torque, vibration, or other extraneous forces, virtually have no effect on weight measurement. An integral cable conduit fitting, sealed strain gages, and a stainless steel transducer ensure long life in wet or washdown locations. High overload capacity, ductile iron mounting hardware, and high strength assembly bolts enable the Z-BLOK to survive where others fail.

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Description

Z-BLOK Weigh Module

Features
Capacity range: 500, 1K, 2K, 5K, 10K, 20K, and 50K lb (227, 454, 907, 2.27K, 4.5K, 9K
and 22.7K kg)
‘Checkless’ design – no stay or check rods required
Low profile and integral thermal expansion assembly simplifies installation
Designed to meet ANSI/ASCE wind load and seismic requirements
Double cantilever design improves system performance and accuracy
cFMus approved
Application: Process Weighing & Batching,Hazardous Areas
Certificates: cFMus
Combined Error: 0.06-0.1 %
Environment Protection Class: IP67,IP66,IP65,IP54,IP20
Industry: Chemical,Pharmaceutical,Food & Beverage
Material: Plated Steel
Max Capacity: k lb: 25-115
Max Capacity: kN: 100-500
Max Capacity: ton: 10-50
Product Type: Weigh Modules & Load Cells

CONFIGURATION

THE DOUBLE CANTILEVER ADVANTAGE

Double cantilever shear beams measure the shear component of force without errors caused by changing point or moment stresses. The Z-BLOK Weigh Module incorporates an outer sleeve that can be thought of as a second cantilever, rigidly attached to the free end of the irst cantilever. Thus the term double cantilever. With this design, rather than applying force at the free end of the beam, the point of load application is brought back to a point directly over the gaged area. The result is that bending moment is close to zero across the gaged area. Because a shear beam is designed to measure shear, not bending, any reduction in bending moment stress is desirable. The second cantilever also is effective at isolating load application point stresses from the active element. Reducing the force due to bending moment in a cantilever beam has a side beneit—a reduction in the beam’s strength requirements. By reducing the bending moment induced at the weakest part of the shear beam (section A-A), a double cantilever shear beam can be operated at a stress level well below that of a single cantilever shear beam. The result is a more conservative structural design with high overload capacity and fatigue resistance. Double cantilever shear beams approach the ideal in load cell design; they measure the desired force while ignoring any extraneous forces that may be present.

 

 

 

THE INTEGRAL THERMAL EXPANSION/RETAINER PLATE ADVANTAGE

 

Z-BLOK’s unique design incorporates an integral expansion/retainer plate assembly with retainer bolts. This mounting arrangement provides simple checkless installation while allowing for minor mounting surface irregularities and vessel/structure expansion and contraction. The spherical load button and socket eliminates torsional stresses on the load element caused by non-level or out of plumb mounting surfaces. End load stresses, caused by vessel/structure expansion and contraction or process vibration, are negated by the telon impregnated slide plate. The expansion/retainer plate assembly is attached to the module at the factory and requires no adjustments. The high strength bolts that connect the module and expansion/retainer plate assembly provide resistance to uplift forces and complete the checkless design.

 

 

 

Load Cell Weigh Module]

OUTLINE DIMENSIONS

Dimensions shown in mm (inches)

SIMULATED WEIGH MODULES

Thermal Insulation Pads In applications where heat conduction is a concern, BLH Nobel can provide thermal pads to isolate the Z-BLOK modules from the hot vessel. The one inch thick, phenolic glass pads install directly between the Z-BLOK expansion/retainer plate and the vessel gusset/mounting bracket for thermal insulation.

SPECIFICATIONS

Category Parameter Value
PERFORMANCE Capacity 500, 1K, 2K, 5K, 10K, 20K, 50K lb (227, 454, 907, 2.27K, 4.5K, 9K, 22.7K kg)
Rated Output (RO) 2.0 mV/V ±0.1%
Repeatability 0.01% RO
Combined Error (best fit) 0.10% RO
Zero Balance 5% RO
Creep (20 minutes) 0.03% RO
Temperature Effect on Zero 0.0017% RO / °F
Temperature Effect on Span 0.0020% Load / °F
ELECTRICAL Recommended Excitation 10 VDC (15 VDC max.)
Input Resistance 350 Ω ±3 Ω
Output Resistance 350 Ω ±3 Ω
Cable Length 32 ft 10 in cable with conduit fitting
TEMPERATURE Safe Range –40 to 220 °F
Compensated Range +30 to 130 °F
ADVERSE LOAD RATINGS Safe Load 150% rated capacity
Safe Sideload 100% rated capacity
Safe Uplift 50% rated capacity
MATERIAL Beams 15-5PH Stainless Steel
Brackets Polished zinc chromate
DEFLECTION & WEIGHT 500 lb Deflection: 0.012 in / Weight: 10 lb
1K lb Deflection: 0.012 in / Weight: 10 lb
2K lb Deflection: 0.013 in / Weight: 15 lb
5K lb Deflection: 0.027 in / Weight: 15 lb
10K lb Deflection: 0.023 in / Weight: 35 lb
20K lb Deflection: 0.047 in / Weight: 50 lb
50K lb Deflection: 0.066 in / Weight: 75 lb

BLH Nobel is continually seeking to improve product quality and performance. Speciications may change accordingly.

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