DC-782 Counting Scale Version 1.
Contents About This Manual ................................................................................................................................... 1 1.0 Introduction.................................................................................................................................. 1 1.1 Capacities and Resolutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Modes of Operation . . . . . . . . . . . . . . . . .
6.3 Program a General Setpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.4 Programming a Preset Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 6.5 Delete Item Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 7.0 RS-232C Communication with PC ..............................................
About This Manual This manual contains operating procedures for the DC-782 counting scale and provides the user with all the information necessary for setup and operation. It is organized based on the procedures you will likely follow when setting up and using your counting scale. This manual applies to Version 1.006 of the DC-782 counting scale series. #AUTION Some procedures described in this manual require work inside the scale base.
1.3 Keyboard and Display Figure 1-1 shows the DC-782 console with its indicator lamps, the function keyboard and the numeric keypad. Annunciators are described in Section 1.3.2. Section 1.3.3 describes the DC-782 keyboard and keypad. Figure 1-1. DC-782 Display 1.3.1 Display Specifications Weight display 5 digits Unit weight display 5 digits Quantity display 6 digits Table 1-2. DC-782 Display Specifications 1.3.
1.3.3 Key Functions The DC-782 features many functions for managing inventory information and scale operation. Figure 1-2 shows the key-sheet and Table 1-4 lists the keys and key functions of the DC-782 keyboard. Figure 1-2. Key Sheet Layout Some keys have different functions depending on what mode or function you are in. Key to Description ON/OFF - Turns the scale display on or off Numeric keys - Used to enter numeric values.
Key Description + (Plus) key. Weighing Mode Programming Mode - Used to accumulate data. Also prompts outputting of data to a PC if one is connected. Used to navigate to the next specification when programming SPEC codes. MODE key - Used to enter the programming mode from the weighing mode. UNIT WEIGHT key - Used to set the unit weight from the numeric keypad and display all digits of the unit weight. to CONFIRM key - Used to confirm the data to be saved or deleted.
2.0 Installation This section describes the procedure for the installation and setup of the DC-782 counting scale. 2.1 Unpacking #AUTION Do not turn scale upside down. Always work with scale on its side! Damage to the load cell can occur if the scale is turned upside down. 1. Immediately after unpacking, visually inspect the DC-782 counting scale to ensure all components are included and undamaged. If any were damaged in shipment, notify Rice Lake Weighing Systems and the shipper immediately. 2.
Leveling Bubble Figure 2-1. Leveling Bubble 2.4 Powering Up the DC-782 The DC-782 can be operated either from an AC power source or with a rechargeable battery pack (DC power). The DC power allows the unit to be completely portable. Instructions for DC operation are contained in Section 2.4.2. 2.4.1 AC Power Source To power up the DC-782 using the AC power cord: 1. Connect the AC power cord under the scale base as shown in Figure 2-2. Figure 2-2. AC Plug-in Location on Underside of DC-782 2.
4. Once the scale is on, the time interval before the scale will automatically power itself off, if there no key is pressed and no weight is placed on the platter, is determined by SPEC 00- Auto Power-Off Function. The default is 0000: Disabled. (For further instructions on how to set the scale’s specifications, see Section 3.2.1) 2.4.
• 2.4.3 going into the normal weighing mode. If SPEC 20, Bit 2 is set to 1: Standard, the scale’s display will test the LCD segments for each numeral from 0 to 9, asterisks, decimal points and annunciators before going into the normal weighing mode. Battery Charging A fully charged battery allows for approximately 300 hours of continuous use (with the backlight off). When the battery is low the battery indicator light will light up.
2.5 Replacement Parts The following list contains the part numbers and descriptions of replacement parts available for the DC-782 counting scale. RLWS Part Number Description 108516 Rechargeable Battery Pack, 6 V, 5.
2.6 Block Diagram of Electrical Connections The following block diagram illustrates the electrical connections.
2.7 Physical Layout of Electrical Connections The following diagram illustrates the actual layout of the electrical connections.
3.0 Configuration Settings This section presents the setup and configuration of the DC-782 counting scale to be used specifically by distributors and service technicians. Configuring these specifications allow you to tailor the DC-782 to your specific applications. Setting the specifications allows you to modify the functionality of the DC-782. Use the tables in this section to view the options you can modify. 3.
2. 3. 4. 5. If this is the SPEC that you want to modify, enter the new setting from the numeric keypad and press the * CONFIRM key to enter the change into temporary memory and move to the next SPEC code. Use the + (plus) and – (minus) keys to scroll through the specifications until you find the one you want. Then make your changes per the instructions in Step 1.
SPEC No.
3. To change another SPEC code before exiting, repeat Steps 1 and 2. 4. To save all the changed SPEC settings currently in temporary memory and exit to the Weighing Mode, press the TARE key. 5. Turn off Power and restart the scale. SPEC No.
SPEC No. 27 28 29 30 ~ 47 Bit 3 Bit 2 Bit 1 Tare Auto Clear Unit Weight Auto Clear Auto Clear Condition 0: Allow 1: Inhibit (DEFAULT) 0: .
4.0 Calibration The DC-782 scale is a high-precision instrument. Although the scale needs very little maintenance, you may want to check the calibration after every month or so of normal usage. To do this you will need to have a test weight of approximately the total capacity of the scale (i.e. a 10 lb weight if you have a 10 lb capacity scale). After the scale is initially installed, put the weight on the platform and record the weight displayed.
3. The scale display will confirm that you are in the Calibration Mode. 4. Make sure that there is no weight on the platform of the scale you are calibrating and press the * CONFIRM key. The scale will flash briefly as it searches for the zero point and then will alternate between showing CAL00 and the capacity. 5. Place a reference weight on the platform. It is preferable to calibrate the scale using a weight equal to the full capacity of the scale (i.e. a 15 lb weight for 15 lb capacity scale, etc.
5.0 Scale Operations The following sections contain detailed operator instructions for the DC-782 counting scale (see Figure 5-1). Included are instructions on how to enter tare weights, how to enter unit weights, and how to perform counting operations. Figure 5-1. DC-782 Counting Scale 5.
Note: The following SPEC codes must be set properly to allow these operations before continuing: SPEC 25, Bit 3 - MANUAL TARE CANCELLATION sets whether or not the tare weight can be cancelled from the keyboard. SPEC 25 also controls whether TARE SUBTRACTION (Bit 2) and TARE ACCUMULATION (Bit 1) are allowed or inhibited and whether AUTO TARE CLEAR WHEN REZERO (Bit 0) takes place or not.
Example: A sample of 10 zener diodes is placed on the scale. The Unit Weight is computed by the scale to be 0.0006536 lbs. However, the scale has a 5 character display for Unit Weight so the scale can only display.0065 as the Unit Weight. If this Unit Weight were recorded and keyboard entered in future counting operations, the resulting error would be: 00065 =.55% .
5.4 Operations Without Recalling an Item Code The following sections describe ways to carry out operations without having to recall the Item codes. 5.4.1 A Single Counting Operation - Without Recalling an Item Code At times you may want to perform a weighing and counting operation without recalling an Item Code from memory. This can be done from the keyboard in the Weighing Mode. 1.
7. Continue with the remainder of the containers to be counted. The total number of parts stored in all the containers will be stored in the accumulation register. 8. To subtract pieces from the accumulation, place the container to be subtracted on the platform and press the - (Minus) key. The display will show CORR and the number of pieces being subtracted. The Memory indicator will continue to be illuminated. 9. 10. 11. 12. 13.
4. If at the end of the procedure, if you want to see how many remain in the bin or container, you first have to know the tare weight of the bin or container. After removing the parts you want to take out of the bin, simply digitally enter the tare weight of the bin and press the TARE key. The scale will display how many parts were left in the bin. If a PC is connected to the DC-782, pressing the * CONFIRM key will output the data to the PC. 5.4.2.
6.0 Scale Programming The DC-782 can store information for the parts you count most frequently, eliminating the need for re-entering data during parts counting. With each Item Code you can specify a Tare Weight, Unit Weight, and Setpoint Value. Up to 25 items can be programmed into your DC-782 counting scale, with as many as 10 of those being able to be assigned to the preset keys (P1 to P10). 6.
to exit the Programming Mode. To change the previously entered data in any field, enter it from the keypad or, in the case of the unit weight you can use the scale to sample for the unit weight. Press the * key after each entry to move to the next field. Once you’ve completed the reprogramming of the item code, press the MODE key to save the changes and exit the Programming Mode. 3. The display will prompt you to enter a tare weight for this item by displaying tare in the Weight column.
6.3 Program a General Setpoint You can program the DC-782 with a setpoint that will be enabled either when no Item Code is called up or when an Item Code is called up from memory that has no setpoint already associated with it in programming. 1. Press the MODE key twice to enter the Programming Mode. The scale display will show ProG. 2. SPEC 04, Bits 1 and 0 - Setpoint Type determines what type of setpoint you are programming: 00: % Quantity, 01: % Weight, 10: Quantity, or 11: Weight.
6.5 Delete Item Memory The DC-782 allows you to delete individual items from memory. The following procedure describes the steps used to delete a single specific Item Code together will all of its associated information (tare weight, unit weight, and set point). 1. Press MODE key twice to enter the Programming Mode. The scale display will show ProG. 2. Enter the Item Code you wish to delete (the Item Code will appear in the Unit Weight display).
7.0 RS-232C Communication with PC The DC-782 Counting Scale is equipped with an RS-232C port that allows the scale to send data to a PC. 7.1 Connection Below are the pin assignments for the connectors to a PC. CN6 (5 pins) 7.2 PC Side PIN SIGNAL PIN SIGNAL 1 RXD RXD 2 2 RTS RTS 7 3 TXD TXD 3 4 CTS CTS 8 5 GND GND 5 TXD RXD GND General Specifications of the RS-232C Interface Baud Rate: Start Bit: Stop Bit: Date Bit: Parity Bit: 7.
7.4 Communication Method SPEC10-RS-232C PC Protocol configures whether the data transfer to the computer is inhibited (0000: Inhibit Data Transfer); is transmitted continuously to the computer (0001: Standard Stream Type (continuous output); is transmitted when pressing the + (Plus), - (Minus), or * CONFIRM keys (0010: Standard Manual Type); or is transmitted only when a command is received from the PC (0011: Standard Command Type). 7.4.
7.4.2 Standard Manual Data Transmission Set SPEC10-RS-232C PC Protocol to 0010: Standard Manual Type. The communication between the DC-782 and the computer flows as follows. SPEC05, Bit 0 determines whether the data is transmitted only when the weight is stable or to output it right away when the * key is pressed. Figure 7-2.
7.4.3 Standard Command Data Transmission Set SPEC10-RS-232C PC Protocol to 0011: Standard Command Type. The data transmission starts by receiving the command from the PC. The communication between the DC-782 and the computer flows as follows: Figure 7-3. Standard Command Data Transmission Flowchart If handshaking is not required for your RS-232 communication with the computer, the RTS and CTS do not need to be connected in the cable and SPC06, Bit 3 - RTS/CTS Handshaking of RS-232C can be set to 1: Off.
Command ENQ Enquiry 0x05 ACK Acknowledge 0x06 NAK Not Acknowledge 0x15 Table 7-1. RS-232C Codes, Headers, Fields and Commands 7.
Weight Condition Flag: Not Used Bit 7: Bit 6: Bit 5: Bit 4: Bit 3: Bit 2: Bit 1: Bit 0: Fixed to 1 Not Used Weight UF Weight OF Negative Net Weight Weight Stable Zero Sign Not used; always set to zero Fixed to 1 Not used Weight UF - 0: when no weight underflow; 1: when weight underflow Weight OF - 0: when no weight overflow; 1: when weight overflow Negative Net Weight - 0: when net weight is not negative; 1: when net weight is negative Weight Stable - 0: when weight is stable; 1: when weight is not
Data Transmission Examples Example 1: If the following are true: Net Weight = 3.400 lb Tare Weight = 1.200 lb Unit Weight = 1.
Example 3: In this example there is a weight overflow and only the status, weight condition flag and net weight are transmitted.
8.0 8.1 Appendix DC-782 Specifications Operating Conditions • • • • Power Source Operating TemperatureOperating Humidity Power Consumption - AC117/100V -10°C ~ +40°C (OIML) 15 ~ 85% RH 18W when using AC power 1.
8.2 DC-782 Error Message List The DC-782’s alphanumeric display allows for detailed error messages. Use Table 8-1 below to find the error message, possible causes for the error and ways to correct the problem. If these suggestions fail to correct the situation, please contact your DIGI dealer for assistance.. Error Message Possible Causes Corrective Action OF When the displayed weight exceeded capacity+9d, or something is on the platter when the power is on. Remove the item on the platter.
9.0 DC-782 Limited Warranty Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in materials and workmanship for two (2) years. RLWS warrants that the equipment sold hereunder will conform to the current written specifications authorized by RLWS.
