Model 3400 Intrinsically Safe Load Cell

Transcription

1 Stainless steel construction Sealed connector IP68 environmental protection Internally amplified 4-20 ma output, loop-powered Unipolar (T or C) or bipolar (T and C) Zero and span adjustment access CE certified Explosion protection by Intrinsic Safety (approval pending) per ATEX designation: II 2 G Ex ib IIC T4 Specially designed load cells with looppowered intrinsically safe amplified output for use in oil field and other hazardous locations. These load cells are derived from other proven Interface models by adding high resistance strain gages for lowcurrent loop power and shielded internal amplifier for extra low emissions and minimal EMI susceptibility. SPECIFICATIONS PARAMETERS ALL S ACCURACY (MAX ERROR) Nonlinearlity % FS ±0.10* Hysteresis % FS ±0.08* TEMPERATURE Compensated Range F 0 to 150 Compensated Range C -18 to 65 Operating Range F -40 to 200 Operating Range C -40 to 93 Zero Balance 4.00 ±0.10 ma Unipolar ±0.10 ma Bipolar Rated Output ±0.016 ma Unipolar ±8.000 ±0.008 ma Bipolar ELECTRICAL Excitation Range +9 to +28 VDC Maximum Loop Resistance 0 9VDC Excitation VDC Excitation *Some capacities of some models have higher performance specifications, contact factory for details. Functional Diagram, Model 3400 Page 1 of 5

2 The Model 3400 is a family of load cells of various mechanical configurations, all with the same internal 4 20 ma loop-powered amplifier and ohm strain gage bridge. All load cells in the family are intrinsically safe when installed per the installation manual and are certified as such by the following Notified Body: Physikalisch-Technische Bundesanstalt Braunschweig, Germany Intrinsic Safety is an explosion protection technique that ensures that a circuit operating in an explosive atmosphere cannot cause ignition. This is done by limiting the electrical and thermal energy in the load cell. The 3400 protection is for Zone 1 and the ATEX designation is: II 2 G Ex ib IIC T4 Specific Models 3401 through 3499 are unique in being constructed in accordance with the certified circuit. Configurations for mechanical connections and force capacities are created to fit individual applications. The following are representative of specific models. Tension - Compression Low Profile Type , 250, 500, 1K 2K, 5K 10K 20K (1) (2) (3) 3/8-24 UNF-3B 1/2-20 UNF-3B 1-14 UNF-3B 1 1/2-12 UNF-3B Tension - Compression Low Profile Type K, 40K, 50K 25K, 50K, 60K 10K, 25K, 50K 100K (1) (2) (3) 2-12 UN-2B 2-12 UN-2B 1-1/4-12 UNF-3B 1 3/4-12 UNF-3B Page 2 of 5

3 Compression Low Profile Type (kn) K, 25K, 50K 100K 200K inch mm inch mm inch mm (1) (2) (3) 6.0 (152) sph 8.0 (203) sph 12.0 (305) sph Tension-Compression Column Type K, 20K, 30K, 50K inch mm (1) (2) (3) (4) (5) 1 1/2-12 UNF-2A Page 3 of 5

4 Load Pin Type Model K 5K 10K 20K 30K inch mm (1) (2) (3) (4) (5) Load Pin Type Model K 75K 100K 200K (1) (2) (3) (4) (5) Page 4 of 5

5 Compression Beam Type Model K 50K inch mm inch mm (1) (2) (3) (4) Tension Link Type Model 3403 Capacity: 44 Klbf Page 5 of 5