"Load cell" is a sensor that measures a weight or a force.
For the load cells as well as amplifiers and indicators where the load cells are connected to, there are "4-wire type" and "6-wire type". If not wired properly, it may cause not only inaccurate measurements, but also may be affected by the temperature or the cable length.
This time, we will explain the wiring method of both 4-wire type and 6-wire type.
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| Analog section | |
| Excitation voltage | DC5V±5% Output current: within 90mA Ratio metric type (Up to six 350Ω load cells can be connected in parallel.) |
|---|---|
| Signal input range | -0.5 to 3.0mV/V |
| Zero adjustment range | Automatic adjustment by digital operation -0.2 to 2.0mV/V |
| Span adjustment range | Automatic adjustment by digital operation 0.3 to 3.0mV/V |
| Minimum input sensitivity | 0.15μV/count |
| Accuracy | Non-linearity: within 0.01%/FS Zero drift: 0.025μV/℃ RTI typ Gain drift: 1ppm/℃ typ |
| A/D converter | Conversion rate: 300 times/sec. Conversion resolution: 24bit (binary) |
| Minimum indication resolution | 1/10000 |
| Setting section | |
| Setting method | Settings are made by operating the membrane keys. Also, settings can be made from a host computer through the RS-485 interface. |
|---|---|
| Memory of set value | F-RAM (nonvolatile RAM) |
| Protect of set value | Software LOCK can be set to parameter such as “Set value” and “Calibration”. |
| Setting items |
Upper limit/ Lower limit/ Near zero/ Set point 1/ Set point 2/ Compensation/ Over/ Under/ Final/ Comparison inhibit time/ Judging time/ Complete output time/ Weighing function 1/ Weighing function 2/ Tare setting/ Tare display/ Digital low pass filter/ Moving average filter/ Motion detection/ Zero tracking (Period)/ Zero tracking (Range)/ Total comparison selection/ Total limit (high 4 digit)/ Total limit (under 5 digit)/ Count limit/ Key invalid/ LOCK/ Input selection/ Output selection/ Password/ Balance weight value/ Capacity/ Min. scale division/ DZ regulation value/ Display selection/ Gravitational acceleration/ Zero calibration/ Span calibration/ RS-485 I/F setting/ Communication type/ RS-485 ID/ Transmission delay time |
| External signal (You can specify whether PNP (Source) type or NPN (Sink) type when order the F701-P.) | |
| Output signals (4) | Select from COMPL./ SP1/ SP2/ SP3/ HI/ GO/ LO/ STAB/ WEIGHT ERROR/ TOTAL FINAL At signal ON, output transistor ON. * External External voltage must be prepared separately by customer. |
|---|---|
| Input signals (4) | Select from G/N/ D/Z ON/ TARE ON/ TARE OFF/ ACCUMULATION CLEAR/ HOLD/ JUDGE Contact (relay, switch etc.) or non-contact (transistor, open collector etc.) can be connected. * External voltage must be prepared separately by customer. |
| Interface | 485: RS-485 communication interface (Select from Modbus-RTU and original format) |
| Display section | |
| Display | 18.5mm in character height, Numerical display on LCD (7 digit) Sub display: 7.3mm in character height (14 digit) |
|---|---|
| Indicated value | 5 digit sign: negative display at the highest digit |
| Accumulation value | 9 digit * This can be changed to “Accumulation count (4 digit)” and “Final(5 digit)”. |
| Display frequency | Select from 1, 2, 5, 10, 20 times/sec. (The system speed is 300 times/sec.) |
| Capacity | 5 digit |
| Min. scale division | Setting allowable in the range of 1 to 50 |
| Decimal point | Select from 0, 0.0, 0.00, 0.000 |
| Over display | LOAD: A/D converter input over, OFL1: Net over, OFL2: Capacity +9 scale division, OFL3: Gross over |
| Center zero | A true zero point or the center of each value is displayed. |
| Status display | COMPL./ SP3/ SP2/ SP1/ HI/ GO/ LO/ ZT/ NZ/ HOLD/ ZALM/ STAB/ TARE/ NET/ GROSS/ CZ |
| General performance | |
| Power supply voltage | AC100 to 240V (+10% -15%)(free power source 50/60Hz) |
|---|---|
| Power consumption | Approx. 5W |
| Inrush current | 1.5A, 0.7mSec: AC100V average load condition (cold start at room temperature) 2.5A, 0.7mSec: AC200V average load condition (cold start at room temperature) |
| Operating conditions | Temperature…Operation -10℃ to +40℃, Storage -20℃ to +85℃ Humidity…85% or less (non-condensing) |
| Dimensions | 192(W)×96(H)×102(D) mm (Projections excluded) |
| Panel cutout dimensions | 186(+2-0)(W)×92(+1-0)(H)mm * Installation panel thickness: 2.0 to 3.2mm |
| Weight | Approx. 1.3kg |
| Attachments | |
| AC input cord (Nominal rating 125V) 3m | 1 |
|---|---|
| Jumper line | 2 |
| Terminator | 1 |
| Operation manual | 1 |
| Rubber packing | 1 |
BR 19502 
US 12229 
VN 8348 
CN 2980 
TR 2380 
SG 2195 
AU 1805 
CA 1766 
