LCHD

Supported Applications

The Omega LCHD Series consists of ultra low profile, tension and compression load cells designed for force measurement in severe environments. These pancake-style sensors utilize high-quality strain gages and precision techniques to ensure long-term stability. The series is calibrated in tension with capacities ranging from 5 lb (2.3 kgf) up to 500,000 lb (10,000 kgf). Designed for mounting via through holes and a threaded center shaft, the LCHD Series incorporates two stabilizing diaphragms welded to the sensing member to reduce off-center and side-load effects.

Operating Conditions & Performance

The series operates within an ambient temperature range of -65°F to 250°F (-54°C to 121°C), with a compensated temperature range of 60°F to 160°F (16°C to 71°C). Thermal effects are specified as Zero: 0.0036% FSO/°C and Span: 0.0036% FSO/°C. Performance specifications vary by capacity:

• Linearity: ±0.25% FSO for capacities ≤25 lb (10 kgf); ±0.10% FSO for ≥50 lb (20 kgf).
• Hysteresis: ±0.10% FSO for ≤25 lb; ±0.08% FSO for ≥50 lb.
• Repeatability: ±0.10% FSO for ≤25 lb; ±0.03% FSO for ≥50 lb.

The load cells feature a 350 Ω bonded foil strain gage bridge with an excitation voltage of 10 Vdc (maximum 15 V). Safe overload is rated at 150% of capacity, and ultimate overload is 300%. Full-scale deflection typically ranges from 0.025 to 0.076 mm (0.001" to 0.003").

Configuration Options

The LCHD Series offers a broad envelope of configurations including standard imperial models and metric variants (LCMHD). Key configurable dimensions include overall diameter, height, and threaded shaft sizes that scale with capacity:

• Capacities: 5 lb to 500,000 lb (2.3 kgf to 10,000 kgf).
• Housing Materials: 17-4 PH stainless steel for all models; 4340 alloy steel is noted in the manual for capacities ≤200 k.
• Electrical Connections: Includes a mating connector. Units up to 5,000 lb use PT06F-10-6S (or DT02H-10-6P); units from 7.5k to 500k use MS3102E-14S-6P.
• Output Signals: Standard output is 2 mV/V for ≤25 lb and 3 mV/V for ≥50 lb, with accuracy ±0.25% FSO.

The series supports several optional suffixes to modify functionality:

• .5E: 5 V Output (calibrated 0 to 5 Vdc in tension; bi-directional ±5 Vdc).
• -DUAL: Dual Bridge configuration.
• .TEDS: IEEE 1451.4 module support.
• -TC1 / -TC2: Extended temperature range options (-45 to 93°C and up to 163°C).
• .OL: Overload stops included.

Key Product Differences

The series distinguishes between standard imperial models (LCHD) and metric models (LCMHD), with specific model numbers corresponding to capacity ranges. For example, LCHD-5K represents a 5,000 lb unit, while LCMHD-10K corresponds to a 10,000 kgf unit. Tension plates are available as accessories for specific ranges (e.g., LCHD-TP225 for 50–1,000 lb). Models exceeding 300,000 lb capacity are calibrated at the 300,000 lb point.

Electrical pinouts follow a standard configuration: Pins A & B (+) Excitation; C & D (-) Excitation; E (-) Output; F (+) Output. The series includes NIST-traceable calibration and comes complete with the mating connector and 59 kΩ shunt data.