Rice Lake DWM-IV Operators Manual
DWM-IV
Digital Weightmeter
Operator Manual
113873
Data Output: Serial ASCII 20 mA current loop with selectable baud rates (15019.2K),
selectable auto or manual print, continuous data out, or bi-directional communication.
Remote Control Inputs: Zero, Tare, Net/Gross, Print. Requires voltage-free contacts.
Enclosure: NEMA-12 wall mount/dust-tight.
Options:
Outputs: Dual port serial RS-232, RS-422, RS-485, and/or 20mA current loop; Parallel
BCD; Analog 4-20mA or 0-5 VDC.
Time and Date: Battery backed up time and date with selectable 12 or 24 hour mode.
Setpoints: Up to six (6) single speed or three (3) two speed setpoints with Zero
Interlock and Fill Complete output.
Table Stand: Provides 60 degree angle mount stand for wall mount enclosure.
N4S Enclosure: NEMA-4 Stainless Steel watertight wall mount enclosure.
Custom Systems: Flex-Weigh offers full engineering support for customized systems.
Contact your local dealer for further details.
Specifications:
Keyboard: Sealed keyboard with tactile keys.
Display: 6 digits and (-) sign. Seven (7) segment, 0.5" high blue vacuum fluorescent
type, with annunciators for: function select, center zero, tare, net, pieces, F1, and F2.
Internal Raw Count: 100,000 counts maximum.
Display Resolution: 1 part in 10,000 maximum Legal for Trade, 1 part in 24,000
extended, 1 part in 100,000 maximum in high resolution mode.
Display Increments: x1, x2, x5, x10, x20, x50, x100.
Decimal Point Location: Selectable 14 places to the left.
A/D Conversion Rate: 15 updates per second.
Response Time: Zero (0) to full scale capacity, selectable to 0.5 to 4 seconds.
Display Rate: Selectable 0.25, 0.5, 1, 2, 5, 10, or 20 updates per second.
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Over Capacity: Displays OLOADat 102% of Full Scale Capacity.
Center Zero: Light indication when scale is within +/-0.25 digit of center of zero (0).
Load Cell Excitation: 15 VDC, powers up to twelve (12) 350 ohm load cells.
Input Sensitivity: 0.6 to 12 microvolts per digit.
Accuracy: 0.01% of full scale or +/- one digit, whichever is greater.
Data Output: Serial ASCII 20 mA current loop with selectable baud rates (15019.2K),
selectable auto or manual print, continuous data out, or bi-directional communication.
Operating Temperature: -10 degrees C to +40 degrees C (+14°F to +104°F).
Humidity: Maximum: 95% RH non-condensing.
Power: 120 or 240 VAC, 5060 Hz, 25 watts.
Fuse: 1/4A @ 120 VAC, 1/8A @ 240 VAC.
Dimensions: 12" (30.48 cm) H x 10" (25.4 cm) W x 5" (12.7 cm) D.
Weight: 16 lb (7.25 kg).
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Installation Requirements
Maximum performance is guaranteed only when installation of the scale system is
performed by a qualified scale technician. For best performance, the AC mains supplying
the scale system must be an isolated circuit free from other loads and not in close
proximity to inductive or SCR controls.
WARNING: THIS SCALE MUST BE OPERATED FROM AN AC POWER SOURCE
THAT PROVIDES AN EARTH GROUND FOR THE SCALE CHASSIS TO ENSURE
SAFE OPERATION AND PROPER PERFORMANCE. THE POWER CORD IS THE
POWER DISCONNECT DEVICE. CARE SHOULD BE TAKEN NOT TO BLOCK
ACCESS TO THE OUTLET IN CASE OF AN EMERGENCY.
Unpacking and Inspection
Remove the weightmeter display from its shipping container. Discard the protective
materials. Do not plug the meter into an AC voltage source until completing the
inspection of the instrument. With a proper screw driver, loosen the screws holding the
lid clasps in place. Open the lid and visually inspect to make sure there are not signs of
shipping damage such as broken wires, loose components, or fractured printed circuit
boards. This visual inspection is necessary if a shipping claim needs to be processed.
Every care has been taken to minimize potential damage that could occur if rough
handling is experienced in transit.
Handbook 44 Requirements
The following applies to Model DWM-IV weightmeters used on Handbook 44
applications.
1) Wire seal provision is required on access lid.
2) Piece count feature must be disabled (Step F5.0 of SET-UP procedure).
3) RFI (Radio Frequency Interference) protection kit option is required in areas where
RFI is present.
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Operating Instructions
A. DISPLAY
The display indicates the arithmetic result of the analog signal derived from the scale
base. The display indicates: OLOAD at 102% of capacity and above.
B. STATUS INDICATORS
The DWM-IV illuminates a triangular arrow above the proper legend for current status of
the display. The status indicators are:
1. SEL - illuminated while accessing the front panel options.
2. ZERO - illuminated when the scale base is within +/- 0.25 increment of zero
3. TARE - when lit, indicates that a tare value is being displayed.
4. NET - when lit, indicates that a non-zero tare value is currently being used.
5. PIECES - illuminated when in the piece count mode to indicate that the display is
showing pieces instead of weight.
6. F1 - Future option. (not labeled on standard units)
7. F2 - Future option. (not labeled on standard units)
C. KEYBOARD
1. [Zero] Button: This button allows re-zeroing of the scale over a +/- 2% range of scale
capacity or full scale capacity (programmable). During set-up, the automatic zero tacking
may be disabled if desired. This button must be pressed for approximately two seconds to
capture zero.
2. [Tare] Button: This button is used to remove the container weight value from the
weight indication. When pressed with weight on the scale no motion present, this tare
value will be stored and subtracted from the gross weight to indicate a net weight display
of zero. Pressing the [TARE] button places the system in net weighing mode.
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3. [Gross/Net] Button: If a tare has been entered, this button will alternately select
between the gross and net weight modes. If the tare has been cleared to zero, the DWMIV will automatically select the gross weight mode. This button will be inactive while the
tare value remains equal to zero.
4. [Print] Button: This button initiates a print cycle to an external peripheral device such
as a ticket printer or computer. The output format may be programmed during the set-up
procedure.
5. [Recall] Tare: The instrument is equipped with a key board to provide a means of
entering a known tare weight. Up to six (6) digits of digital tare may be entered up to the
full capacity. Entries greater than full capacity will be cleared to zero. The least
significant digit (LSD) is automatically rounded to conform to the pre-programmed
instrument LSD. Press the [RECALL TARE] button then a numeric button corresponding
to the tare register desired (if ten (10) tare look-up feature is enabled) and the [ENTER]
button. The previously displayed data will be shown. Enter the required value and press
[ENTER]. This value is then stored in memory. A non-zero value places the system in net
weighing mode.
6. [Select]: This button is used to access the pre-programmed front panel functions as
indicated on the corresponding buttons zero through nine.
7. [Clear]: Used to clear a mistaken entry while in one of the data entry modes.
8. [Enter]: This button is used to store data into memory and also to sequence through the
data entry procedure.
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D. FRONT PANEL FUNCTIONS
TEST Allows the operator to test the integrity of the weight display by sequentially
lighting each segment of all digits, all segments, and each arrow indicator. These results
show that all drivers and displays operate in both the on and the off conditions.
PRESET The DWM-IV provides up to eight (8) outputs which may be used to control
solid state relays. The system may be configured for three (3) two-speed or six (6) singlespeed, cascaded setpoints. In addition, zero interlock and FILL COMPLETE outputs are
provided which, when used with additional, external hardware, may be used to simplify
batching operations. Enter the weight value desired for each preset starting with number
zero through to number three (3) or six (6). The zero interlock preset is number zero. If it
is desired to merely view the presets already in memory, simply press [ENTER] without
pressing any numeric buttons or [CLEAR]. The weight values will be displayed from
zero (0) to three (3) or six (6) then return to normal weight display mode.
DRIBBLE The value entered as the dribble amount is subtracted from the final
setpoint (PRESET-PREACT) and this amount is the fast feed cut-off setpoint. It
represents the amount of material desired to be filled at the slow rate. The values are
entered in the manner as described for PRESET above where number one (1) corresponds
to PRESET number one (1) above, etc. This function is only active if the two-speed
configuration has been selected.
PREACT Enter the value of weight that is to be subtracted from the preset value in
computing the final cut-off value for the output. This value represents the amount of inflight material.
T/D This function allows the operator to enter the current time and date for print-out
purposes. The time and date option must be installed and enabled for this feature to be
operative.
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SUBTOTAL The DWM-IV contains ten (10) registers for weight accumulation. The
subtotal of all previously recorded weights or pieces may be recalled and/or printed using
this button. The totals registers remain intact after use.
TOTAL The totals may be viewed/printed as described in SUBTOTAL above with the
exception that after printing, the current total register is cleared to zero along with the
consecutive numbering register. The current register used for totalizing is selected by this
function.
ID The ID function allows the operator to enter up to seven (7) digits of numeric ID.
The current value of ID is displayed and may be changed by use of the numeric and
[ENTER] buttons.
CN The consecutive number may be viewed or changed using this button. The CN is
automatically cleared to zero by totalizing but may be initialized to any value by use of
the numeric buttons. The CN increments before a print cycle begins, as initiated by the
[PRINT] button.
PC WT This function allows the instrument to be used for piece counting by entering
the known weight per piece. This mode is automatically selected if the current piece
weight register is OTHER than zero. The front panel indicator for PIECES will illuminate
while in the pieces mode. Any of nine (9) different registers may be selected with
different piece weight factors.
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Front Panel Data Entry
Select the desired function from the examples given below. Then press
the buttons in the order shown from left to right. The following
symbols are used to indicate numeric button entry which may be
comprised of multiple numeric entries.
The dotted line symbol indicates that numeric entry at this point in the
sequence is not required unless the data are to be changed.
FUNCTION 0: TEST all display segments.
FUNCTION 1: PRESET entry of weight values. Two speed feed
enabled.
Preset
0
FUNCTION 1: PRESET entry of weight values. Single speed feed
enabled.
Preset
0
Preset 1 Preset 2
Preset 1
Preset
2-5
Preset
3
Preset
6
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FUNCTION 2: DRIBBLE entry of weight values.
Dribble
1
FUNCTION 3: PREACT entry of weight values. Two speed feed
enabled.
Preact
1
FUNCTION 3: PREACT entry of weight values. Single speed feed
enabled.
Dribble
2
Preact 2
Dribble
3
Preact
3
Preact
1
FUNCTION 4: T/D Time and Date Entry - 12 Hour Mode.
Date Time
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Preact
2-5
Preact
AM-
6
PM
FUNCTION 4: T/D Time and Date Entry - 24 Hour Mode.
Date Time
FUNCTION 5: SUBTOTAL Subtotal viewing or printing of selected
register.
or
Reg #
FUNCTION 6: TOTAL Total viewing or printing of selected register.
Also selects the current register.
Reg #
Prints
Subtotal
or
Prints
Total
Exits.
No
Printing
Exits.
No
Printing
FUNCTION 7: ID Numeric ID entry of up to seven digits.
ID
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FUNCTION 8: CONSECUTIVE NUMBERING CN viewing or
changing.
CN
FUNCTION 9: PIECE WEIGHT Weight per Piece Entry and Piece
Mode Selection. Note: Selecting Register 0 will disable the piece
counting mode and return the display to the weight mode.
Pc Wt
Reg #
RECALL TARE: Keyboard Tare Entry of Known Tare Value.
Tare
Weight
RECALL TARE: Keyboard Tare Entry (Ten Tare Look -up)
Pc Wt
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Tare
Reg
Tare
Weight
How to Enter and Exit System Setup
Locate the small dip switch block in the lower right corner of the mother board. Turn on
S1, the display should then show FSE F1.
From the FSE Fn display you may scroll forwards and backwards using the [TARE] and
[ZERO] buttons. When the page you want is displayed, press [PRINT] to accept and view
the first step in that page.
Example: If the setup switch S1 is turned on, the display will show FSE F1. Press
[ZERO] button. The display will show FSE F6, press [PRINT], display will show F6.0 n.
You may now change the current setting for F6.0 by pressing [TARE], accept the setting
by pressing [PRINT], or backup to F5.9 by pressing [ZERO].
You may also go directly to the page you wish to change by pressing the pa ge number
minus 1 on the keypad, after S1 is turned on. (Example: Operate S1. Display shows FSE
F1. Press 3. Display shows FSE F4.)
Upon completion of your changes you may exit and save without having to go all the way
to the end of the setup steps by pressing the [F1] button (on most units this will be an
unlabeled button under [RECALL/TARE], second down from the top, on the right hand
side). The display will go to FCd0. Press [PRINT] to save changes or press [TARE] to
change option to 1 or 2. Option 1 will discard all changes you have made (you can also
do this by turning off S1 at any time before the display shows FILEd. Option 2 (not
available on earlier software) is used to reset the factory defaults into the EEPROM
where all of the setup data is stored (U14 under the A/D board.).
Once you have selected which FCd option to use (usually 0 which is how it comes up
automatically) save your selection by pressing [PRINT] after about a second the display
should read FILEd, at this time you may turn off the setup switch S1 and return to the
weighing mode.
Function Select Enable Descriptions:
F1 Contains settings that control the overall operation of the scale, such as averaging,
update rate, motion detection, zero tracking, etc.
F2 Tare functions, setpoint options & powerup options are set here.
F3 Serial port parameters, enabling of print fields, and custom formatting.
F4 Serial data output formats, modes.
F5 Enables individual right hand keyboard functions.
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