Continuous weighing system GRAM WM

on-board

Overview
GRAM WM is a digital weighing system designed to convert existing structures into industrial scales. The kit includes four digital load cells, a platform junction box and an integrated Xtrem® digital module that securely stores calibration and adjustment data. Installation is fast and flexible without a dedicated platform; once calibrated the system transmits weight data directly to indicators, PCs, tablets or Android smartphones.

Key features

• Converts existing structures into industrial scales without a dedicated platform
• Complete digital kit: 4 load cells, junction box and integrated Xtrem® module
• Calibration and adjustment data stored inside the Xtrem® core for data safety and long-term stability
• Flexible connectivity: RS-232C standard; optional Wi‑Fi; indicators support RS-232C, Ethernet and USB host
• Available in nickel-plated steel or AISI 304 stainless steel for different industrial environments
• Designed for continuous industrial use with H8C Rebel load cells

Components

• 4 × digital load cells (H8C Rebel)
• Platform junction box (rated IP-67)
• Integrated Xtrem® digital module (stores calibration/adjustment data)

Capacity & accuracy
The system supports platform assemblies from 2,000 kg per cell up to configurations of 4 × 2,000 kg (up to 8,000 kg total). Resolution options range from 200 g to 1,000 g depending on configuration and indicator selection. Trade approval is not included by default; selectable tare memories and weighing units (g, kg) depend on the chosen indicator.

Connectivity & integration

• Platform connection: RS-232C standard; Wi‑Fi optional
• Indicator connectivity: 2 × RS-232C (varies by model), Ethernet, USB host
• Direct transmission to indicators, PCs, tablets or Android smartphones without intermediate equipment in many use cases
• Full ERP/API integration supported; compatible with Xtrem PC Software, EX Link, PW Link and Xtrem App for Android for CSV export and multi-terminal workflows

Materials & protection

• Load cells and structural supports: nickel-plated steel or AISI 304 stainless steel
• Indicator housings: stainless steel or PVC depending on model
• Junction box protection: IP-67
• Indicator protection: commonly IP-65 (varies by model)
• Xtrem® module dimension (example): 140 × 67 × 33 mm

Compatibility & accessories

• Compatible with GRAM indicators and terminals (examples: Z8i, Z8, K3W, K3iX, K3iXP, K3X)
• Works with GRAM printers (PR4, Q2, Q300/Q700i/Q800i families depending on indicator)
• Supports remote displays (RD3), three-level LED traffic light for checkweighing and other visual signals
• Installation ecosystem: painted/stainless bases, indicator columns, U-brackets, wall mounts, ABS swivel supports, RS-232 and USB cables, Wi‑Fi boards and optional digital expansion (relays, RTC)
• Optional ISOCAL verification and calibration certificates available for traceability and ISO 9001 support

How it works
GRAM WM installs on existing structures using four load cells connected to the platform junction box and the integrated Xtrem® module. After mechanical installation and calibration, the module provides a stable digital output to connected indicators or devices. Wi‑Fi is optional and can operate in parallel with wired connections for simultaneous data paths.

Technical specifications

• Model: GRAM WM
• Capacity range: 2,000 kg per cell up to 4 × 2,000 kg (up to 8,000 kg total)
• Resolution: 200 g to 1,000 g (depending on configuration)
• Units: g, kg
• Trade approval: not included by default
• Tare memories: available (example: memory for 20 preset tares depending on indicator)
• Weighing filters: motion and animal filters; adaptive filters on some indicators
• Limits/classification: programmable min/max limits stored in internal SQL on compatible terminals
• Piece counting: yes (selectable sample sizes: 10, 25, 50, 100)
• Platform connectivity: RS-232C standard; Wi‑Fi optional
• Indicator connectivity: RS-232C, Ethernet, USB host (varies by model)
• API/ERP: full integration supported
• Materials: nickel-plated steel or AISI 304 stainless steel components
• IP protection: junction box IP-67; indicators typically IP-65 (varies)
• Xtrem® module size: 140 × 67 × 33 mm
• Battery (wireless indicators where applicable): lead-acid options with approx. 30/60 h service time depending on model
• Included in kit: 4 load cells, junction box, integrated Xtrem® digital module