Rice Lake SCT20-DN Technical Manual

© Rice Lake Weighing Systems. All rights reserved. Rice Lake Weighing Systems® is a registered trademark of Rice Lake Weighing Systems. All other brand or product names within this publication are trademarks or registered trademarks of their respective companies. All information contained within this publication is, to the best of our knowledge, complete and accurate at the time of publication. Rice Lake Weighing Systems re ...

i Contents Technical training seminars are available through Rice Lake Weighing Systems. Course descriptions and dates can be viewed at www.ricelake.com/training or obtained by calling 715-234-9171 and asking for the training department. 1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Rice Lake continually offers web-based video training on a growing selection of product-related topics at no cost. Visit www.ricelake.com/webinars 3.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.1 Semi-automatic Tare (Net/Gross) . . . . . . . . . . . . . . . . . . . . . . . . ...

1 1.0 Introduction Manuals are available for viewing and/or downloading from the Rice Lake Weighing Systems website at www.ricelake.com/manuals Warranty information can be found on the website at www.ricelake.com/warranties 1.1 Safety Safety Signal Definitions: DANGER Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Includes hazards t ...

2 Visit our website www.RiceLake.com 1.2 Equipment Recommendations IMPORTANT Failure to follow the installation recommendations is considered a misuse of the equipment. To Avoid Equipment Damage • Keep away from heat sources and direct sunlight. • Protect the instrument from rain. • Do not wash, dip in water or spill liquid on the instrument. • Do not use solvents to clean the instrument. • ...

3 Figure 1-1. Installation Recommendations 1.4 Load Cells 1.4.1 Load Cell Input Test (Quick Access) 1. From the weight display, press for three seconds. is displayed. 2. Press . The response signal of the load cell is displayed, expressed in mV with four decimals. 3. Press three times to exit test mode. 1.4.2 Load Cell Testing Load Cell Resistance Measurement (Use A Dig ...

4 Visit our website www.RiceLake.com 1.5 Connectivity Figure 1-2. Connectivity 1.6 Features of the SCT Weight Transmitter • Weight indicator and transmitter for Omega/DIN rail mounting suitable for back panel; space saving vertical shape. • Six-digit semi alphanumeric display (18 mm h), 7 segment. • Four-key keyboard. Dimensions: 25 x 115 x 120 mm. • Displays the gross weight; with an external c ...

5 1.7 Electrical Connections Basic Information • It is recommended that the negative side of the power supply be grounded. • It is possible to power up to eight 350 ohm load cells or sixteen 700 ohm load cells. • For 4-wire load cells, make a jumper between EX- and REF- and between EX+ and REF+. • Connect terminal 0 VDC to the RS-485 common when interfacing to A/C powered equipment ...

6 Visit our website www.RiceLake.com 1.8 LED Functions Figure 1-4. Display Table 1-1. LED Functions LED Main Function Secondary Function * NET Net weight LED None 0 Zero LED (deviation from zero not more than +/- 0.25 divisions) LED lit: output 3 closed Stability LED LED lit: output 2 closed kg Unit of measure: kg LED lit: output 1 closed g Unit of measure: g LED lit: input 2 closed L Unit of measure: ...

7 1.9 Key Functions Figure 1-5. SCT Weight Transmitter Display and Keys Table 1-3. Key Definitions KEY Short press in weigh mode Long press (3 sec) in weigh mode Function within Setup Menus Escape — Zero Setting Escape from a parameter or return to previous menu or operation mode. Scroll/ Backspace Captures Tare Gross  Net Removes Tare Net  Gross Move to the previous parameter in a ...

8 Visit our website www.RiceLake.com 6. Set the desired output type and the full scale value. • Analog Output Model (Section 2.6 on page 19) • DeviceNet Model (Section 2.5 on page 19) • Ethernet Model (Section 2.8 on page 21) • PROFIBUS Model (Section 2.7 on page 20) • Modbus/TCP (Section 3.10 on page 42) 7. If using serial communication, set the related parameters. See Section 2.4 on page 16. ...

9 2.0 Configuration 2.1 Scale Menu Figure 2-1. Scale Menu Structure Parameter Options Description           Calibration (Section 2.1.1 on page 10)    Filter on the weight (Section 2.2 on page 15 ...

10 Visit our website www.RiceLake.com 2.1.1 Calibration Figure 2-2. Calibration Menu Structure        Analog options for outputs and inputs configuration (Section 2.10 on page 24)   PROFIBUS settings (Section 2.7 on page 20)   � ...

11  0.50000- 7.00000  Sensitivity – a load cell rated parameter expressed in mV/V; set the average sensitivity value indicated on the load cells Example of 4-cell system with sensitivity 2.00100, 2.00150, 2.00200, 2.00250; enter 2.00175, calculated as (2.00100 + 2.00150 + 2.00200 + 2.00250) / 4.  1 2 5 10 20 50 100 0.0001 0.0 ...

12 Visit our website www.RiceLake.com To calibrate the instrument, the theoretical calibration (Section 2.1.2 on page 11) must be completed first. After theoretical calibration is set, the scale can be set with actual weights (Section 2.1.6 on page 13). 2.1.2 Theoretical Calibration This function allows load cell rated values to be set. To perform the theoretical calibration set , ...

13 2.1.5 Zero Value Manual Entry IMPORTANT Perform this procedure only if it is not possible to zero off the scale structure, for example because it contains product that can not be unloaded. Enter the estimated structured dead load value that would be zeroed. 1. Press and hold , then press .  is displayed. 2. Press ,  is displayed. 3. Press or until  ...

14 Visit our website www.RiceLake.com 2.1.7 Setting Units of Measure 1. Press and hold , then press .  is displayed. 2. Press ,  is displayed. 3. Press or until  is displayed. Press . 4. Press or until desired unit is displayed. Press . 5. Press twice to exit set-up menu. Table 2-3. Units of Measure Unit Display Description  Kilogram ...

15 All other settings are expressed in weight value. To convert them to the new unit of measurement, perform a Theoretical Calibration For Other Units Of Measure on page 14 or a Weight (Span) Calibration For Other Units Of Measure on page 15 to change the system calibration. The parameter  must remain set to 1.0000. Theoretical Calibration For Other Units Of Measur ...

16 Visit our website www.RiceLake.com 2.3 Zero Parameters 1. Press and hold , then press .  is displayed. 2. Press or until  is displayed. Press . 3. Press or until desired parameter is displayed. See Table 2-6 . 4. Press . The currently programmed value is displayed. 5. Press or until desired value is displayed. Press to accept. 6. Press twice to exit set-up me ...