LAUREATE SERIES
SCALE / WEIGHT METER OWNERS MANUAL
Now with USB & Ethernet
LAUREL Electronics Inc.
3183-G Airway Ave, Costa Mesa, CA, 92626, USA
Tel: (714) 434-6131 • Fax: (714) 434-3766 • Website: www.laurels.com
1
1. ORDERING GUIDE
Configure a model number in this format: LW20201SG1, CBL01
LW ........... Laureate scale / weight meter
Display Color
1 .............................DPM with green LED
2 .................................DPM with red LED
Power
0 ........................................... 85-264 Vac
1 ........................ 10-48 Vdc or 12-32 Vac
Setpoint Output
0 ..................................................... None
1 ........................... Two 8A contact relays
2 ............................Two solid state relays
Analog Output
0 ..................................................... None
1 .............. 4-20 mA, 0-10V, -10V to +10V
Digital Interface
0 ..................................................... None
1 ...................................................RS232
2 ...................................................RS485
4 ..................................... RS485-Modbus
5 ...................................................... USB
6 .......................USB-to-RS485 converter
7 ................................................ Ethernet
8 ................ Ethernet-to-RS485 converter
Input Type
Process Signals
(4-20 mA, 0-10V, etc.)
P............................. 4-20 mA = 0-100.00
P1……………. ...............Custom Scaling
Specify min signal & reading, max signal
& reading. 10 Vdc excitation.
Strain Gauge, Potentiometer
(4-wire ratio)
SG ........................ 0-200 mV = 0-100.00
SG1 ............... Custom Scaling
Specify min signal & reading, max signal
& reading. Full-scale ranges 200 mV to
20V. 10 Vdc excitation.
Load Cells (6-wire ratio)
WM1….….................-99,999 to +99,999
Specify min input & reading, max signal
& reading. Full-scale range 20 mV to
500 mV. 10 Vdc excitation.
Options & Accessories
BL ................Blank lens, no button pads
CBL01 .. ....... RJ11-to-DB9 RS232 cable
Connects meter to PC com port.
CBL02 .. ................ USB-to-DB9 adapter
................. For use with CBL01
CBL05 .. ................................USB-cable
... Type A male to Type B male.
IPC ................... NEMA-4 panel cover
BOX1.... .. NEMA4 wall mount enclosure
BOX2.... .........................BOX1 plus IPC
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2. TABLE OF CONTENTS
1. ORDERING GUIDE ..................................................................................................... 2
2. TABLE OF CONTENTS............................................................................................... 3
3. PRODUCT INTRODUCTION....................................................................................... 4
4. ADVANCED OPERATING FEATURES ....................................................................... 5
5. RECEIVING & UNPACKING ....................................................................................... 6
5. SAFETY CONSIDERATIONS...................................................................................... 6
7. CONNECTOR WIRING INFORMATION ..................................................................... 7
8. MECHANICAL ASSEMBLY ......................................................................................... 9
9. FRONT PANEL SETUP KEYS .................................................................................... 11
10. ENABLING & LOCKING OUT MENU ITEMS .............................................................. 13
11. PROCESS & STRAIN INPUT JUMPERS .................................................................... 14
12. LOAD CELL INPUT JUMPERS ................................................................................... 15
13. SCALE METER SETUP............................................................................................... 16
14. DUAL RELAY OUTPUT OPTION ............................................................................... 21
15. ANALOG OUTPUT OPTION ....................................................................................... 24
16. SERIAL COMMUNICATION OPTIONS ....................................................................... 25
17. EXCITATION OUTPUT & POWER SUPPLY............................................................... 30
18. INSTRUMENT SETUP VIA PC.................................................................................... 31
19. SCALE METER CALIBRATION................................................................................... 34
20. SCALE METER SPECIFICATIONS............................................................................. 35
21. GLOSSARY OF TERMS.............................................................................................. 38
22. WARRANTY ................................................................................................................ 44
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3. PRODUCT INTRODUCTION
The Scale Meter is a compact, inexpensive, and extremely accurate digital panel meter with
special firmware for weighing applications. It is available with a load cell or a DC signal conditioner board.
The load cell signal conditioner board accepts full-scale ranges of ±20, ±50, ±100, ±250
and ±500 mV with 4- or 6-wire load cell hookup to display up to 99,999 counts. With 4-wire
hookup, the meter operates in a ratiometric mode to eliminate errors due to supply variations.
With 6-wire hookup, it also compensates for variations in transducer lead resistance, thereby
allowing long cable runs in changing temperature environments. The built-in, isolated excitation supply can power up to four 350-ohm load cells in parallel at 10 Vdc.
The DC signal conditioner board can be jumpered for ratiometric strain gauge voltage
ranges ±200 mV, ±2V or ±20V. With this board, a 20 mV strain gauge output can be scaled to
display up to 10,000 counts, while a 200 mV output can be scaled to display up to 99,999
counts.
Meter accuracy is 0.01% of full scale ± 2 counts. Custom curve linearization, available with an
optional Extended main board, can extend the accuracy of actual load cells near the low and
high ends of their ranges. It also allows high accuracy readings to be achieved with lower cost,
less linear load cells.
The standard power supply is a switching model designed for universal AC power. A lowvoltage supply is optional for power from 10-48V batteries or from 12-30 Vac. Both supplies
provide an isolated 5, 10 or 24Vdc transducer excitation output.
The meter case conforms to the 1/8 DIN size standard. It is made of high impact, 94V-0 ULrated plastic and is watertight to NEMA-4 (IP65) when panel mounted. Mounting is from the
front of the panel and requires less than 110 mm behind the panel. Power and signal wiring is
via removable plugs conforming to UL61010C safety standards. All output options are isolated
from meter and power ground to 250 Vac.
Alarm or setpoint control is provided by an optional relay board with two Form C 8A contact
relays or two Form A 130 mA solid state relays. The setpoints may be latching or non-latching,
be energized above or below the setpoint, or operate in a fail-safe mode. The relays can
operate from the filtered signal to reduce relay chatter or from the unfiltered signal for fastest
response. Snubber circuits and a programmable relay switching time delay extend relay
contact life.
An isolated analog output of 4-20 mA, 0-20 mA, 0-10V or -10 to +10V can be provided by an
optional analog output board. The output is linearized to the display and can operate from the
filtered or unfiltered signal input. It can be scaled via front panel pushbuttons or the meter’s
serial interface.
Ethernet, USB, RS232, or RS485 (2-wire half-duplex or 4-wire full-duplex) serial communications options are available with the Modbus protocol or a simpler custom ASCII protocol.
Modbus operation includes RTU or ASCII modes, up to 247 digital addresses, and up to 32
devices per RS485 line without a repeater. Ethernet-to-RS485 and USB-to-RS485 converter
boards allow a meter to be interfaced to a PC and to multiple meters on an RS485 network.
Scale meter programming can be via the meter’s front panel or a PC running Windows
based Instrument Setup Software (serial interface option required).
4
4. ADVANCED OPERATING FEATURES
• Setpoint offset. The ON/OFF setpoint control action can be programmed to occur with a
specified offset. For instance, if bags are to be filled to 100 lbs and the material delivery
spout is known to hold and dispense an additional 2.5 lbs following shut-off, an offset of -2.5
lbs can be programmed. The setpoint can then be set to 100 lbs, and the filling valve will be
automatically shut off when the measured weight reaches 97.5 lbs.
• Dribble factor. On/off setpoint control action can be programmed to occur with a specified
offset. For instance, if bags are to be filled to 100 lbs and the material delivery spout is
known to hold and dispense an additional 2.5 lbs following shut-off, an offset of -2.5 lbs can
be programmed. The setpoint can then be set to 100 lbs, and the filling valve will be
automatically shut off when the measured weight reaches 97.5 lbs.
• Count-by function. The weight meter can be programmed so that the display is rounded off
to multiples of 1, 2, 5, 10, 20, 50, 100, 200, 500 or 1000. For example, if count-by 10 is
selected, the meter will display 20 for an internal count of 15 to 24.
• Fixed dummy right-hand zero. The display can be shifted to the left for a fixed zero to the
right, allowing values up to 999,990 to be displayed.
• Auto-zero function. An auto-zero limit from 0 to 9 counts can be programmed to compen-
sate for load cell drift. Whenever the meter comes to rest within that limit from zero, it will
auto-zero. It will auto-tare to display zero with a slowly drifting input. Entering 0 disables
auto-zero.
Two tare functions: auto-tare and manual tare. In auto-tare, a control input line is grounded
by an external pushbutton. This causes the current weight, which is normally the empty weight
of the container to be stored in memory as an offset. In manual tare, the tare value can be
entered manually via the front panel or a computer. For instance, the tare value may be the
stated empty weight of a truck or rail car. Pressing the Reset button on the front panel toggles
the display between gross weight (total weight on the scale) and net weight (gross weight with
tare subtracted).
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5. RECEIVING & UNPACKING
Your scale meter was carefully tested and inspected prior to shipment. Should the meter be
damaged in shipment, notify the freight carrier immediately. In the event the meter is not
configured as ordered or the unit is inoperable, return it to the place of purchase for repair or
replacement. Please include a detailed description of the problem.
6. SAFETY CONSIDERATIONS
Warning: Use of this equipment in a manner other than specified may impair the protection of the device and subject the user to a hazard. Visually inspect the unit for signs of
damage. If the unit is damaged, do not attempt to operate.
Caution:
• This unit must be powered with AC (mains) from 85-264 Vac with the high voltage power
supply option, or 12-32 Vac (10-48 Vdc) with the low voltage power supply option. Verify
that the proper power option is installed for the power to be used. This meter has no AC
(mains) switch. It will be in operation as soon as power is connected.
• The 85-264 Vac mains connector (P1 Pins 1-3) is colored Green to differentiate it from
other input and output connectors. The 12-32 Vac (10-48 Vdc) mains connector is colored
Black.
• Do not make signal wiring changes or connections when power is applied to the instrument.
Make signal connections before power is applied. If reconnection is required, disconnect
the AC (mains) power before such wiring is attempted.
• To prevent electrical or fire hazard, do not expose the instrument to excessive moisture.
• Do not operate the instrument in the presence of flammable gases or fumes; such an
environment constitutes a definite safety hazard. This meter is designed to be mounted in a
metal panel.
• Verify the panel cutout dimensions, and mount according to instructions.
Symbols used
Caution (refer to accompanying documents)
Operating environment:
The meter is Class II (double insulated) equipment designed for use in Pollution degree 2.
Caution, risk of electric shock.
Equipment protected throughout by double
insulation or reinforced insulation.
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Earth (ground) terminal.
Both direct and alternating current.
7. CONNECTOR WIRING INFORMATION
CONNECTORS
Connectors for signal and power are UL-rated
screw-clamp terminal blocks that plug into
mating jacks on the printed circuit board.
Communication connectors are a single RJ11
plug for RS232, dual RJ11 plugs for RS485,
dual RJ45 plugs for RS485 Modbus, or USB.
* Control inputs 1 & 2 of P1 are menu
selectable.
Warning: Hazardous voltages may be present on pins 4, 5 & 6 of P1 since digital ground is
tied to pin 3 of P5 (-Signal Input). Keep pin 3 close to earth ground to minimize common mode
voltage or shock hazard at pins 4, 5 & 6 of P1.
P4 – SIGNAL INPUT
Excitation voltage can be jumpered for 5, 10 or 24 Vdc (Section 17).
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P3 - SERIAL COMMUNICATIONS P4 - ANALOG OUTPUT
RS232 INTERFACE Computer
N/C
ISO GND
RX
TX
RTS
N/C
RS485 INTERFACE - FULL DUPLEX
ISO GND
BRX
ARX
ATX
BTX
ISO GND
6
5
4
3
2
1
GND
TX
RX
RTS
RS485 INTERFACE - HALF DUPLEX
6
5
4
3
2
1
GND
BTX
ATX
ARX
BRX
GND
ISO GND
ATX / ARX
BTX / BRX
ISO GND
6
5
4
3
2
1
GND
ATX / ARX
BTX / BRX
GND
RS485-MODBUS - FULL DUPLEX RS485-MODBUS - HALF DUPLEX
(A') RXD0 (B') RXD1 +
(B) TXD1 *
(A) TXD0 -
ISO GND
1
2
3
4
5
6
7
8
TXD0
TXD1
RXD1
RXD0
GND
(B) TX / RXD1
(A) TX / RXD0
ISO GND
1
2
3
4
5
6
7
8
(B) TX/RXD1
(A) TX/RXD0
GND
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8. MECHANICAL ASSEMBLY
with tab release
REMOVING THE REAR PANEL
First remove any connectors. Use one hand to press in the two sides of the rear of the
case, and the other hand to press down the two protruding tab releases at the top of the
rear panel (see figure below). This will unhook the rear panel from the case.
Retaining tab
with tab release
Retaining tab
Retaining tab
Retaining tab
Rear Panel
REMOVING THE ELECTRONICS
With the rear panel removed, grasp the power supply board to the left and signal conditioner board to the right, and carefully slide the electronic assembly out through the rear of
the case. (see figure below).
INSTALLING NEW 0PTION BOARDS
Options boards plug into the main board at the front of the meter. These are plug-and-play
and may be installed in the field. They will be recognized by the software, which will
provide access to the menu items associated with that board. If necessary, remove rear
panel knockouts for new boards. Boards plug into connectors as follows:
Option Board Main Board Plug Rear Panel Jack
Power supply
Relay board
Serial interface board
Analog output board
Signal conditioner board
P11
P12
P13
P14
P15
J1
J2
J3
J4
J5
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Note: Corresponding main board and option board connectors have the same number of
electrical lines. When an option board is correctly installed, the top and bottom edges of the
main board and option board are aligned.
REASSEMBLING YOUR METER
Slide the electronics assembly into the case until the display board is seated flush against
the front overlay. Insert the bottom tabs of the rear panel into the case, and then carefully
align the board connectors with the openings in the rear panel. If necessary, remove any
rear panel knockouts for new option boards that may have been installed. Ensure that all
option boards are properly aligned with the molded board retaining pins on the inside of the
rear panel. Once the rear panel is in place, reinstall the input/output screw clamp terminal
plugs.
PANEL MOUNTING
Ensure that the panel mounted gasket is in place against the back of the bezel. Turn the two
mounting screws counterclockwise until the space between the mounting pawl and the rear
of the gasket is greater than the panel thickness. Insert the meter in the panel cutout. Turn
the mounting screws clockwise until the meter is securely mounted in the panel. Do not
overtighten.
Dimensioned case drawings
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9. FRONT PANEL SETUP KEYS
Meter Front Panel
There are four front panel keys, which change function for the Run Mode and Menu Mode,
effectively becoming eight keys. The keys are labeled with alphanumeric captions (MENU,
PEAK, RESET, ALARMS) for the Run Mode and with symbols ( right arrow,
right triangle, up triangle, left arrow) for the Menu Mode.
FRONT PANEL LOCKOUT
The Menu Mode will not work with most meters as received from the factory, since all menu
items have been disabled in software and a lockout jumper is in place. That jumper needs to
be removed for the Menu Mode to work, and menu items under Loc 1, Loc 2 and Loc 3 then
need to be set to "0" via the front panel for these menu items to be unlocked See Section
10. The paragraphs below assume that all menu items have been unlocked.
MENU MODE KEY ACTION
In the Menu Mode, pressing a key momentarily advances to the next menu item. Holding
down a key automatically advances through multiple menu items for fast menu navigation.
KEYS IN RUN MODE
MENU Key. Pressing MENU from the Run Mode enters the Menu Mode. Pressing
MENU repeatedly will step the meter through the various menu items (if these have not
been locked out) and then back to the Run Mode.
PEAK Key. Pressing PEAK normally causes the peak value of the input signal to be
displayed. The peak display then blinks to differentiate it from the normal present value
display. Pressing PEAK again returns the display to the present value. The PEAK key
can also be programmed to display Valley, alternating Peak or Valley, or to Tare the
reading to zero. When Peak or Valley is selected, periodic horizontals bars at the top of
the display indicate Peak, and periodic horizontals bars at the bottom indicate Valley.
RESET Key. Pressing RESET with PEAK resets peak and valley values. Pressing
RESET with ALARMS resets latched alarms. Pressing RESET with MENU performs a
meter reset (same as power on). Meter reset can also be applied via a rear panel
connect or a serial ASCII command.
ALARMS Key. Pressing ALARMS once displays the setpoint for Alarm 1. Pressing it
again displays the setpoint for Alarm 2. Pressing it again returns to the present value.
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KEYS IN MENU MODE
Right Arrow Key (MENU). Pressing steps the meter through all menu items that
have been enabled and then back to the Run Mode. With the DC signal conditioner
board and no option boards, available menu items are _InPut, SEtuP, ConFG, _FiLtr,
dEc.Pt, SCALE, OFFst, Loc 1, Loc 2, Loc 3. If a change has been made to a menu
item, that change is saved to non-volatile memory when the key is pressed next,
and StoreE is displayed briefly.
Right Triangle Key (Digit Select).
• Pressing from the InPut menu brings up all meter functions available with the
meter's signal conditioner. For the DC signal conditioner, these are _dC U, _dC A
and _rAtio.
• Pressing from the SEtuP, ConfFG, FiLtr, SCALE, OFFSt, Loc 1, Loc 2 or Loc 3
menus items sequentially selects digit positions 1 - 5, as indicated by a flashing digit:
00000, 00000, 00000, 00000, 00000.
• Pressing from the dEC.Pt menu item sequentially selects decimal point positions,
which will flash: d.dddd dd.ddd ddd.dd dddd.d ddddd. .ddddd.
Up Triangle Key (Value Select). Pressing for a flashing item (digit position or
decimal point position) will increment that item. Pressing MENU will save any changes.
Left Arrow Key (Reverse Menu). Pressing has the same effect as the MENU key,
except that menu items are brought up in reverse order.
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10. ENABLING & LOCKING OUT MENU ITEMS
Lockout Digits for Menu Items
For security reasons and ease of meter operation, any and all
menu items may be disabled or "locked out" so that they are no
longer accessible from the front panel. Each function to be
disabled can be set to "1" in menu items Loc 1 through Loc 4, and
each function to be enabled can be set to "0." The Loc menu items
can in turn be locked out by installing an internal hardware jumper.
With the jumper installed, the operator only has access to enabled
menu items. With the jumper removed, the operator has access to
the Loc menu items.
SETTING THE HARDWARE LOCKOUT JUMPER
To access the lockout jumper, remove the rear panel per Section
10 and locate jumper “a” in the lower portion of the power supply
board next to the input connectors (see figure).
SETTING SOFTWARE LOCKOUTS
Set the lockout digit to "1" if you do not want the
menu item to be changed by an operator, otherwise to “0”.
Loc 1 Loc 2 Loc 3 Loc 4
Press the MENU key until Loc 1, Loc 2, Loc 3
or Loc 4 is displayed. Note: hardware lockout
jumper “a” must be removed (see above).
00000
12345
Press to set the flashing digit to "0" to enable the
menu item or to "1" to disable. Press MENU to
enter. See the table to the right for the list of menu
items that can be enabled or disabled.
11111
Press to display the lockout status, consisting of
1’s and 0’s. The left digit will flash. Press again
to step to the next digit, which will flash.
Loc 1
2 – Net/Gross display (reset key)
3 – Input type selection
4 – Setup, config. & decimal pt.
5 – Count-by and auto-zero
Loc 2
2 – Filtering
3 – Scale, Lo In, Hi In
4 – Offset, Lo Rd, Hi Rd
5 – Tare
Loc 3
2 – Alarm config.
3 – Change alarm setpoints
4 – Analog output scaling
5 – Serial comm. config.
Loc 4
2 – View peak value
3 – View alarm setpoints
4 – Front panel function resets
5 – Front panel meter reset
13
11. PROCESS & STRAIN INPUT JUMPERS
Process and strain input scale meters utilize the DC signal conditioner board, which offers
sensitivity to ±200 mV and can operate in a ratiometric mode, which removes effects caused
by variations in the excitation supply. This board needs to be configured via jumpers for the
desired voltage or current range. All signal ranges are factory calibrated with calibration factors
stored in EEPROM. The meter software recognizes the board and will bring up the appropriate
menu items for it; however, it does not recognize the jumper settings. Please see further
manual sections for relay output, analog output, communications, and transducer excitation
output.
RANGE SELECTION VIA JUMPERS
Voltage Ranges Jumpers
FS Input E1 E2 E3
±200.00 mV
±2.0000 V
±20.000 V
±200.00 V
±300V (UL)
±600V (not UL)
A
A
B
B
B
B
f
f
h
h
g
g
b
a
b
a
a
a
a
B
A
E3
E2
h
Current Ranges Jumpers
f
b
g
FS Input E1 E2 E3
±2.0000 mA
±20.000 mA
±200.00 mA
±5.000 A
1. Letters indicate jumper position. Jumpers are installed on pins adjacent to letters.
2. Use 5 mm (0.2") jumpers for locations designated by a capital letter.
3. Use 2.5 mm (0.1") jumpers for locations designated by a lower case letter.
4. Store spare jumpers on an unused jumper post not associated with a capital letter.
SCALE & OFFSET SETUP
A
A
A
A
e, g
d, g
c, g
a, b, g
b
b
b
b
c
d
e
b
a
E1
For process, strain, and load cell scale meters, scaling is normally set up from the front panel
using the and keys, but can also be set up via RS232/485 using PC-compatible
Instrument Setup software (available at no charge). The meter allows three scaling methods to
be selected: 1) Scale & Offset method, 2) Coordinates of 2 Points method, or 3) Reading
Coordinates of 2 Points method. Only menu items applicable to the selected method will be
presented. Please see the Glossary for an explanation of each method.
14
12. LOAD CELL INPUT JUMPERS
Load cell scale meters utilize the load cell signal conditioner board, which offers sensitivity to
±20 mV full scale and 4- or 6-wire load cell connection. This board needs to be configured via
jumpers for the desired voltage range. All signal ranges are factory calibrated with calibration
factors stored in EEPROM. The meter software recognizes the board and will bring up the
appropriate menu items for it; however, it does not recognize the jumper settings. Please see
further manual sections for relay output, analog output, communications, and transducer
excitation output.
RANGE SELECTION VIA JUMPERS
Ranges & Display with
Scale Factor = 1
Input Jumpers
±20 mV
±50 mV
±100 mV
±250 mV
±500 mV
Notes 1. See Section 17 to select 10V excitation.
2. Jumpers are 2.5 mm (0.1 in).
3. Store spare jumpers on an unused jumper post.
SCALE & OFFSET SETUP
e
a
b
c
d
Full scale
display
±20000
±50000
±10000
±25000
±50000
For load cell scale meters, scaling is normally set up from the front panel using the and
keys, but can also be set up via RS232/485 using special PC-compatible Instrument Setup
software (available at no charge). The meter allows three scaling methods to be selected:
1) Scale & Offset method, 2) Coordinates of 2 Points method, or 3) Reading Coordinates of
2 Points method. Only menu items applicable to the selected method will be presented. Please
see the Glossary for an explanation of each method.
15
13. SCALE METER SETUP
When the Reading Coordinates of 2 Points scaling method has been selected under SEtuP,
the four menu items below will appear ahead of all other menu items when the MENU or
key is first pressed from the run mode.
This scaling method applies a straight line fit between two points, which are determined
from actual transducer signals and the desired corresponding meter readings. A low signal,
such as the output of a load cell at zero weight, and a high signal, such as the output of the
same load cell at a known high weight, are applied to the meter. The desired corresponding
low and high readings are then entered from the front panel. The meter then applies straight
line fit between the high and low calibration points. This scaling method has the advantage
of calibrating the transducer and meter as a system. The actual voltage or current at either
point does not need to be known. This method is ideal for process and load cell scale
meters, which require zero and span adjustment.
The programming example below is for a scale meter used with a 4-20 mA load cell transducer for 0 to 100 lbs. Decimal points are set separately using the dEC.Pt menu.
Press Menu Select
Lo In Apply low signal input
(e.g., transducer output for 0
psi).
Hi In Apply high signal input
(e.g., transducer output for
known 100.00 psi source).
Lo rd
Mode to enter desired low
reading (e.g., 0.00).
Hi rd
Mode to enter desired high
reading (e.g., 100.00).
Key
Press Digit Select
_40.21 Press to display
reading at low signal input
(e.g., 4.021 mA).
200.94 Press to display
reading at high signal input
(e.g., 20.094 mA).
000.00 000.00 000.00
000.00 000.00 Select digit
to flash.
000.00 000.00 000.00
000.00 000.00 Select digit
to flash.
Key
Press Value Select
_40.21 Press to store low
reading.
200.94 Press to store high
reading.
100.00 Select -9 thru 9 for
flashing first digit, 0 thru 9 for
other flashing digits.
100.00 Select -9 thru 9 for
flashing first digit, 0 thru 9 for
other flashing digits.
Key
16
OTHER KEYSTROKES FOR SCALE METER SETUP
If the MENU key does not work, see Section 10 “Enabling & Locking Out Menu Items.”
Press Menu
Select Key
_InPut
DC signal conditioner board
_InPut
Load cell signal
conditioner board
SEtuP
Meter Setup
Press Digit
Select Key
_dC U
DC Volts
_dC A
DC Amps
_rAtio
Strain gauge & ratio
_Strn
Strain or ratiometric
_dC u U
DC millivolts
00000
Dummy zero
00000
Power line frequency
00000
Peak Key Action
Press Value Select
Key
__0.2U __2.0U _20.0U 200.0U 600.0U
0.2, 2, 20, 200, 660V FS
__2.0A _20.0A _200.0A _5.0A
0.2, 20, 200 mA, 5A FS
__0.2U __2.0U _20.0U
0.2, 2, 20V FS.
_20.0____50.0_ _100.0 _250.0 _500.0
20, 50, 100, 250, 500 mV FS voltage
_20.0____50.0_ _100.0 _250.0 _500.0
20, 50, 100, 250, 500 mV FS voltage
0 No dummy zero (display to 99999)
1 Dummy zero (display to 999990)
0 Noise minimized for 60 Hz
1 Noise minimized for 50 Hz
0 Display peak
1 Tare action
00000
Scaling method
00000
Control inputs 1 & 2
or both:
True = logic 1 (0V or
tied to digital ground)
False = logic 0 (5V or
open)
0 Scale and offset method
1 Coordinates of 2 points method
Input 1 Input 2 Both 1 & 2
0 Meter Reset Meter Hold Meter Reset
1 Funct Reset Peak Displ Meter Reset
2 Meter Hold Peak Displ Funct Reset
3 Meter Hold Tare Action Tare Action
4 Peak Disp Tare Action Funct Reset
5 Meter Reset Tare Action Meter Reset
6 Funct Reset Tare Action Meter Reset
7 Tare Reset Tare Action Meter Reset
8 Displ Blank Tare Action Meter Reset
9 Meter Reset Displ Blank Meter Reset
A Funct Reset Displ Blank Meter Reset
B Displ Item Tare Action Tare Action
C Displ Item Displ Blank Funct Reset
D Meter Reset Displ Item Meter Reset
E Funct Reset Displ Item Meter Reset
F Meter Hold Displ Item Meter Reset
17
Press Menu
Select Key
Press Digit
Select Key
Press Value Select
Key
ConFG
Meter Configuration
Count
Count-by or
Auto-zero function
00000
Negative readings
00000
Setup method
00000
Dribble function
00000
Peak key action
00000
Adaptive filtering
00000
Count by
(see Glossary)
00000
Auto-zero
(see Glossary)
0 Allow negative readings
1 Disallow negative readings
0 Scale & offset method
1 Reading coordinates of 2 points method
0 Dribble enabled
1 Dribble disabled
0 Peak of net value
1 Peak of Gross value
0 Enable adaptive filtering
1 Disable adaptive filtering
0 Count by 1 5 Count by 50
1 Count by 2 6 Count by 100
2 Count by 5 7 Count by 200
3 Count by 10 8 Count by 500
4 Count by 20 9 Count by 1000
0 No auto-zero 5 ± 1 count
1 ± 2 counts 6 ± 3 counts
2 ± 4 counts 7 ± 5 counts
3 ± 6 counts 7 ± 7 counts
4 ± 8 counts 9 ± 9 counts
FiLtr
Filtering
00000
Alarm filtering
00000
Peak & Valley filtering
00000
Display filtering
00000 Adaptive filter
threshold
0 Unfiltered output
1 Filtered output
0 Unfiltered Peak & Valley
1 Filtered Peak & Valley
0 Display batch average every 16 readings
1 Display filtered signal
0 Low adaptive filter threshold level
1 High adaptive filter threshold level
18
FiLtr
Filtering
(continued)
00000
Input signal filtering.
Can be applied to display, setpoint, analog
output, data output.
0 Autofilter Readings
1 Batch avg 16 60 Hz 50 Hz
2 Moving avg . 07 s .08 s
3 Moving avg .14 .16
4 Moving avg .28 .34
5 Moving avg .57 .68
6 Moving avg 1.13 1.36
7 Moving avg 2.27 2.72
8 Moving avg 4.53 5.44
9 Moving avg 9.06 10.88
A Moving avg 18.1 21.7
B Moving avg 36.2 43.4
C Moving avg 72.5 85
D Moving avg 145 174
E Moving avg 290 348
F No filter
d.dddd
Decimal point flashes.
d.dddd dd.ddd ddd.dd dddd.d ddddd.
.
ddddd Press to shift the decimal point.
Scaling method “Scale and Offset” if selected under SEtuP
SCALE
Scale factor
OFFst
Offset value
0.0000 0.0000 0.0000
0.0000 0.0000 0.0000
Select digit to flash.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Select decimal point
location when decimal point is flashing.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point
location is selected by dEC.Pt.
Scaling method “Coordinates of 2 points” if selected under SEtuP. Appears before _InPut.
Lo In.
Low signal input.
Lo rd
Desired reading at
Lo In.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point is set
by input range chosen.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point is set
by dEC.Pt.
Hi In.
High signal input.
Hi rd.
Desired reading at
Hi In.
_tArE
Tare value
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point is set
by input range chosen.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point is set
by dEC.Pt.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Decimal point
location is selected by dEC.Pt.
19
Option board dependent menu items
ALSEt. -SP1-d -SP2-d
Menu items related to alarm setup These will only appear if a relay board is detected. If so,
please see Section 14.
AnSEt. An Lo. An Hi..
Menu items related to analog output setup. These will only appear if an analog output
board is detected. If so, see Section 15.
SEr 1. SEr 2. SEr 3. SEr 4. _Addr
Menu items related to serial communications. These will only appear if an RS232 or
RS485 I/O board is detected. If so, see Section 16.
Menu lockout items
Loc 1. Loc 2. Loc 3. Loc 4.
Menu items used to enable or lock out (hide) other menu items. Loc menu items may in turn
be locked out by a hardware jumper. Please see Section 10.
* Scaling method 2, “Reading Coordinates of 2 Points Scaling Method,” will appear before all
other Menu items, including _InPut. Decimal point is set by dEC.Pt.
20
14. DUAL RELAY OUTPUT OPTION
An optional relay board may be installed in the
scale meter main board at plug position P2,
adjacent to the power supply board. This board
is available in two versions: 2 mechanical relays
or 2 solid state relays. Once installed, the relay
board is recognized by the meter software and
PC-based Instrument Setup software, which will
bring up the appropriate menu items for the
board type. These menu items will only be
brought up if a relay board is detected. Both
relay boards offer a choice of operating modes:
Off or On in alarm mode; latched or non-latched; alarm high, low or disabled; alarms on net or
gross weight; and time delay to alarm.
KEYSTROKES FOR SETPOINT SETUP
If the MENU key does not work, see Section 10 “Enabling & Locking Out Menu Items.”
Press Menu
ALSEt
Alarm Setup for
relays 1 & 2 if
detected.
Press until
ALSEt is displayed.
Select Key
00000
Relay state when
alarm is active.
00000
Alarm latching or nonlatching.
00000
Alarms high, low, or
disabled.
Press Digit
Select Key
Press Value Select
0 Relay 1 On Relay 2 On
1 Relay 1 Off Relay 2 On
2 Relay 1 On Relay 2 Off
3 Relay 1 Off Relay 2 Off
0 AL1 non-latching AL2 non-latching
1 AL1 latching AL2 non-latching
2 AL1 non-latching AL2 latching
3 AL1 latching AL2 latching
0 AL1 hi active AL2 hi active
1 AL1 lo active AL2 hi active
2 AL1 disabled AL2 hi active
3 AL1 hi active AL2 lo active
4 AL1 lo active AL2 lo active
5 AL1 disabled AL2 lo active
6 AL1 hi active AL2 disabled
7 AL1 lo active AL2 disabled
8 AL1 disabled AL2 disabled
Key
00000
Alarms comparison on
gross or net weight
00000
Number of consecutive
readings in alarm zone
to cause an alarm.
0 AL1 net AL2 net
1 AL1 gross AL2 net
2 AL1 net AL2 gross
3 AL1 gross AL2 gross
0 After 1 reading 4 After 16 readings
1 After 2 readings 5 After 32 readings
2 After 4 readings 6 After 64 readings
3 After 8 readings 7 After 128 reading
21
Press Menu
ms
Select Key
Press Digit
Select Key
Press Value Select
Key
_SPI_d
Alarm 1 dribble
value
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
Select -9 thru 9 for flashing first digit, 0 thru 9
for other flashing digits. Active high alarms
will activate above the setpoint (positive
_SP2_d
Alarm 2 dribble
value
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
dribble value) or below the setpoint (negative
dribble value).
KEYSTROKES FOR VIEWING & CHANGING SETPOINTS
The (Alarms) key can be used to step through and view setpoints while the meter continues to make conversions and performs setpoint control. If the (Peak) key is pressed while
a setpoint is displayed, conversion stops and the setpoint can be changed. After pressing ,
you have 30 seconds, or the meter will revert to the normal display. To view setpoints, menu
item Loc3, digit 3, must have been set to 0. To change setpoints, menu item Loc4, digit 3, must
have been set to 0.
Press Alar
Key
300.24
Press (Alarms)
to display Alarm 1
setpoint.
_200.00
Current setpoint 1 digit blinks, and
Alarm 1 LED indicator lights. Press
to select another digit, which will blink.
Press Digit
Select Key
Press Value Select
Key
_295.00
To change setpoint 1 value,
press to change the
selected blinking digit value.
395.00
Press (Alarms)
to display Alarm 2
setpoint.
_395.00
Current setpoint 2 digit blinks, and
Alarm 2 LED indicator lights. Press
to select another digit, which will blink.
_305.00
To change setpoint 2 value,
press to change the
selected blinking digit value.
300.24 Press (Alarms) again. Meter will reset and display current reading.
22
ALARM TYPES
Latched alarms stay actuated until reset. They can shut down machinery or a process when a
setpoint (or limit) has been exceeded or maintain an alarm condition until acknowledged by an
operator.
Non-latched alarms change state automatically when a reading rises above a setpoint and
change back automatically when the reading falls below that setpoint.
Dribble is a settable scale meter parameter in counts which allows a flow to be shut off before
the setpoint value has been reached. For example, set the setpoint to 100.0 (1000 counts) and
the dribble factor to -50 counts to turn off the fill of a 100.0 lb bag at 95.0 lbs if the shut-off
system is known to dribble another 5.0 lbs following shut-off.
23
15. ANALOG OUTPUT OPTION
An analog board may be installed in the meter at rear panel jack position J4, adjacent to the
signal conditioner board. Once installed, this board is recognized by the meter, which will bring
up the appropriate menu items for it. These will not be brought up if an analog output board is
not installed.
The analog output can be a 0-20 mA, 4-20 mA or 0-10V unipolar signal with respect to isolated
ground, or a bipolar -10V to +10V voltage signal with respect to a reference return line.
Unipolar or bipolar operation is selected by a jumper. A unipolar current or voltage output is
selected at the connector. Unipolar 4-20 mA or 0-20 mA current is selected in software.
Unipolar current or voltage: Jumper a
Bipolar -10 to +10 voltage: Jumper b
The low analog output (0 mA, 4 mA, 0V, or -10V) may be set to correspond to any low
displayed reading An Lo. The high analog output (20 mA, 0V or 10V) may be set to correspond to any high displayed reading An Hi. The meter will then apply a straight line fit between
these two end points to provide an analog output scaled to the meter reading.
KEYSTROKES FOR SETUP
If the MENU key does not work, see Section 10 “Enabling & Locking Out Menu Items.”
Press Menu
AnSEt
Analog Output Setup.
Press until AnSEt
is displayed (requires
analog output board).
An Lo
Low displayed value
for 0 mA, 4 mA, 0V, or
-10V output
An Hi.
High displayed value
for 20 mA or 10V output
Select Key
___00
Analog output signal
selection.
___00
Analog output source.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
0.0000 0.0000 0.0000
0.0000 0.0000
Select digit to flash.
Press Digit Select
Key
Press Value Select
0 0-20 mA current output
1 0-10V voltage output
2 4-20 mA current output
3 -10 to +10V voltage output
0 Net filtered
1 Gross filtered
2 Net unfiltered
3 Gross unfiltered
Select -9 thru 9 for flashing first
digit, 0 thru 9 for other flashing
digits. Decimal point location is
fixed by dEC.Pt selection.
Select -9 thru 9 for flashing first
digit, 0 thru 9 for other flashing
digits. Decimal point location is
fixed by dEC.Pt selection.
Key
24
16. SERIAL COMMUNICATION OPTIONS
A serial communications board may be connected to the meter main board at plug position
P13 (middle position). Available boards are RS232, RS485 (with dual RJ11 connectors),
RS485 Modbus (with dual RJ45 connectors), USB, USB-to-RS485 converter, Ethernet, and
Ethernet-to-RS485 converter. The dual connectors of RS485 boards are wired in parallel to
allow daisy chaining of addressable meters without use of a hub. Three serial communication
protocols are selectable for all serial boards: Custom ASCII, Modbus RTU, and Modbus ASCII.
A USB-to-RS485 converter board or an Ethernet-to-RS485 converter board allows a meter
to be interfaced to a computer and be the device server for a network of up to 31 other meters
on an RS485 bus, while itself retaining all capabilities of a meter. The remote meters need to
be equipped with our RS485 digital interface board with dual 6-pin RJ11 jacks, not our RS485
digital interface with dual 8-pin RJ45 jacks. The dual 6-pin RJ11 jacks on the RS485 board are
wired in parallel to allow multiple meters to be daisy-chained using readily-available 6-wire
data cables with no need for hand-wiring or an RS485 hub. The outer two wires are used for
ground.
Use 6-wire, straight-through data cables, not 4-wire telephone cables or crossover cables,
all the way from the device server to the last device on the RS485 bus. Connect ATX to ATX,
BTX to BTX, etc., with no crossover as you go from device to device.
To connect a meter with a USB board to a computer, use a USB cable with Type A and
Type B connectors. The computer will display “Found new Hardware” followed by “Welcome to
the Found new Hardware Wizard.” Follow the instructions for software installation from a CD.
When the installation is complete, use Device Manager to determine the com port. To get to
Device Manger, go to the Windows Control Panel, click on System, click on the Hardware tab,
then click on Device Manager. Go down the device list and click on Ports (COM & LPT) and
USB serial port (com #). Note the com port # for use with communications to your meter, then
exit Control Panel. If you later need to change the Com port, right-click on USB serial port
(com #), then on Properties, Port settings, and Advanced. Change port to the desired number,
click OK, then exit Control Panel.
To connect a meter with an Ethernet board to a computer, see our separate Ethernet
Manual, which covers our Node Manager Software. This Windows-based application runs on a
host computer and is used to configure our Ethernet Nodes. It automatically discovers all
Nodes on a LAN or WAN, plus any devices connected to Server Nodes via an RS485 bus. It is
used to configure each Node, such as setting communication parameters, naming the Node
and associated devices, entering email addresses for alarm notification and data requests,
selecting the Node's time zone for time-stamping of emails and streaming data, and upgrading
firmware. Once configuration data has been stored in flash memory of all Nodes, Node
Manager Software can be closed.
BOARD SETUP VIA JUMPERS
USB Board
No jumpers required.
25
Basic Ethernet Board
No jumpers needed.
RS232 Board
e - Normal operation.
f - Slave display to RS232 from another meter.
g - Pull-up resistor on RTS line.
Note: Board is shipped with jumpers e and g installed
RS485 Board, Full Duplex Operation
b & d - Installed on last meter in long cable run.
RS485 Board, Half Duplex Operation
a & c - Installed for half duplex operation.
d - Installed on last meter in line with long cable runs.
Note: Board is shipped with no jumpers installed.
RS485-Modbus Board, Full Duplex Operation
b & e - Bias jumpers should be installed on 1 board.
a & d - Installed on last meter in long cable run.
RS485-Modbus Board, Half Duplex Operation
b & e - bias jumpers installed on 1 board.
c & f - installed for half duplex operation.
a - installed on last meter in line with long cable runs.
Note: Board is shipped with no jumpers installed.
Ethernet-to-RS485 Converter Board
& USB-to-RS485 Converter Board
Full Duplex Operation
No jumpers for short cable runs.
Add b & d for long cable runs.
Half Duplex Operation
a & c - Installed for half duplex operation.
d - Installed on last meter in line with long cable runs.
Modbus
cd
e
f
a
b
RJ45
RJ45
26
SERIAL CONNECTION EXAMPLES
27
KEYSTROKES FOR SETUP
If the MENU key does not work, see Section 10 “Enabling & Locking Out Menu Items.”
Press Menu
.SEr 1.
Fixed Parameters:
No parity
8 data bits
1 stop bit
Select Key
Press Digit Select
__000
Output signal source
__000U
Baud rate
__000U
Output update rate for
continuous mode
Key
Press Value Select
0 Send unfiltered value
1 Send filtered value
0 300 baud
1 600 baud
2 1200 baud
3 2400 baud
4 4800 baud
5 9600 baud
6 19200 baud
60 Hz 50 Hz
0 Line frequency Line frequency
1 0.28 sec 0.34 sec
2 0.57 sec 0.68 sec
3 1.1 sec 1.4 sec
4 2.3 sec 2.7 sec
5 4.5 sec 5.4 sec
6 9.1 sec 10.9 sec
7 18.1 sec 21.8 sec
8 36.6 sec 43.5 sec
9 72.5 sec 97 sec
Key
28
Press Menu
Select Key
Press Digit Select
Key
Press Value Select
Key
.SEr 2.
Serial Setup 2
.SEr 3.
Serial Setup 3
_0000U
Line feed
_0000U
Alarm data with readings
_0000U
Control of data output
_0000U
Meter address with Custom
ASCII protocol
00000U
Half or full duplex
00000U
Special start & stop char.
00000U
RTS mode
00000U
Termination characters
0 No line feed after carriage return
1 Line feed after carriage return
0 No alarm data
1 Alarm data with reading
0 Continuous data output
1 Data output on command only
Select 1 thru F for addresses 1 thru 15.
Select 0. thru F. (with decimal point) for
addresses 16 thru 31.
0 Full duplex
1 Half duplex
0 Standard continuous mode
1 Special start & stop characters
0 Normal RTS
1 RTS pulse single transmission
0 Only at end of all items
1 At end of each item
SEr 4.
Serial Setup 4.
_Addr
Modbus Address.
Appears only if the
Modbus protocol is
selected.
00000U
Data sent in continuous
mode
__000U
Modbus ASCII gap timeout
__000U
Serial protocol
__000U
Parity
__000 __000 __000
Select digit to flash.
0 Net + gross
1 Net only
2 Gross only
3 Peak only
4 Net + gross + peak
0 1 sec
1 3 sec
2 5 sec
3 10 sec
0 Custom ASCII, 8 bits, no parity
1 Modbus RTU, 8 bits
2 Modbus ASCII, 7 bits
0 None, 2 or more stop bits
1 Odd, 1 or more stop bits
2 Even, 1 or more stop bits
__247
Select 0 through 9 for flashing digit.
Address range is 1 to 247.
29
17. EXCITATION OUTPUT & POWER SUPPLY
Three isolated transducer excitation output levels are available from the power supply board.
These are selectable via jumpers b, c, d, e, f in the upper right of the board, as illustrated.
In addition, the board provides three jumper positions for special features. The same jumper
locations apply to the universal power supply (85-264 Vac) and to the low voltage power
supply (12-32 Vac or 10-48 Vdc).
Excitation output Jumper locations
5 Vdc ±5%, 100 mA max
10 Vdc ±5%, 120 mA max
24 Vdc ±5%, 50 mA max
SELECTION OF OTHER JUMPERS
Jumper a - Front panel menu lockout, locked when installed. (See Section 10)
Jumper g - Provides +5V power output at P1-4 when installed.
Jumper h - Connects "Control Input 2" to P1-4 when installed.
b, d, e
b, d, f
c
30
18. INSTRUMENT SETUP VIA PC
Instrument Setup software is a PC program which is much easier to learn than front panel
programming. It is of benefit whether or not the meter is connected to a PC. With the meter
connected to a PC, it allows uploading, editing and downloading of setup data, execution of
commands under computer control, listing, plotting and graphing of data, and computer
prompted calibration. With the meter unconnected to a PC, it provides quick selection of
jumper locations and a printable display of menu selections for front panel setup.
SOFTWARE INSTALLATION
Download IS2*.exe onto your PC from the web or the distribution CD. Double-click on the
downloaded file to unzip it into a special directory, such as c:\temp. Within that directory,
double-click on setup.exe, which will install the software on your PC.
PREREQUISITES FOR CONNECTED USE
1) PC with available Com port.
2) Meter to be set up.
3) Communication board in the meter. This board
can be used for meter setup, then be removed.
4) Cable to connect the meter and PC (see
Section 1, Ordering Guide).
5) Instrument Setup software.
ESTABLISHING COMMUNICATIONS
Connect the meter and PC. Apply power to the meter. Be sure that the meter is in Run
Mode, not Setup Mode. To start the software from Windows, click on Start => Programs =>
IS2 => IS2. Click on RS232 and select the meter parameters. The program will temporarily
set the selected Com port to the required baud rate, parity, data bits and stop bit. Once
communications have been established, click on Main Menu. The software will sense the
type of meter and installed boards, but it cannot sense jumpers positions nor set jumpers for
you. If the computer is not connected to a meter, select DPM and Series 2.
31
SETUP OF CONNECTED METER
A setup file can be retrieved from the meter (DPM => Get Setup), be edited (View =>
Setup), be saved to disk (File => Save Setup), be retrieved from disk (File => Open Setup),
and be downloaded into one or multiple meters (DPM => Put Setup). Downloading of setup
files from a PC can be a major time saving when multiple meters have to be set up in the
same way.
You will find that Instrument Setup software is very user friendly, with separate tabselectable windows for Input+Display, Scaling, Filter, Relay Alarms, Communications,
Analog Out, and Lockouts. If the required hardware, such as the analog output board, is not
sensed, the corresponding tab will be grayed out.
ADDITIONAL FEATURES
• The Commands pull-down menu allows you to execute certain meter functions by using
your computer mouse. You can reset individual meter functions, display current or peak
readings, and enter numbers to be displayed remotely by the DPM. The first position of a
transmitted number must be a blank, + sign or - sign. Five digits and a decimal point must
be transmitted. Leading 0’s serve as blanks. The Commands pull-down menu will be grayed
out unless a Get Setup has been executed.
32
Plot
• The Readings pull-down menu provides three formats to display DPM data on the PC
monitor. Use the Pause and Continue buttons to control the timing of data collection, then
press Print for a hardcopy using your PC printer.
- List presents the latest readings in a 20-row by 10-column table. Press Pause at any
time to freeze the display. Press Print for a hardcopy. List can capture peak readings.
- Plot generates a plot of readings vs. time in seconds. It effectively turns the DPM-PC
combination into a printing digital oscilloscope.
- Graph generates a histogram, where the horizontal axis is the reading and the vertical
axis is the number of occurrences of readings. The display continually resizes itself as
the number of readings increases.
• The Jumpers pull-down menu provides
jumper positions for the various meter
boards, duplicating information in this
manual.
• The Calibration pull-down menu allows
easy calibration of voltage and current
ranges for the DC, load cell, and AC RMS
signal conditioner boards. The PC first
recognizes the type of board, then prompts
you to apply specific jumpers and calibration signals. Press Ready to take a reading. Press Repeat to take more readings.
When you have decided on which reading
to accept, press on the number 1 through 10 of that reading. Additional calibration software
is available online.
Graph
METER SETUP WITH AN UNCONNECTED PC
Instrument Setup software is also of benefit when the PC is not connected to a meter. Upon
launching the software, click on None for Communications, then on DPM and Series 2. Click
on File => Default Setup to retrieve a default setup file from disk, or on File => Open Setup
to retrieve a previously saved setup file from disk.
33
To enter new setup information, click on View => Setup, then make your screen selections
as if you were connected to a meter. Tabs will be grayed out if you have not selected the
required hardware under the Input+Display tab. When
done, press on Main Menu, then on View => Menu.
The selections made under Setup will now be shown
in the form of the required front panel programming sequence, where each row corresponds to a menu item
selected by the key, and the seven data columns
correspond to values entered via the and keys.
Click on any step in the sequence to bring up a
detailed help window.
Click on Print for a hardcopy, which you can then use
as an instruction sheet to program your meter via its
front panel.
Click on Main Menu => File => Save Setup As to save
your setup to disk and have an electronic record.
19. SCALE METER CALIBRATION
All analog input and analog output ranges of the meter have been digitally calibrated at the
factory prior to shipment using calibration equipment certified to NIST standards. Calibration
constants are stored digitally in non-volatile memory in EEPROM on the signal conditioner
board and analog output board. As a result, these boards may be changed without requiring
meter recalibration.
If recalibration is required, the meter may be returned to the factory or to any authorized
distributor. Easy calibration of DC and load cell signal conditioner ranges is possible using our
Instrument Setup software. To allow computer aided calibration, an RS232 or RS485 interface
card must be installed in the meter. This card may be installed temporarily and be removed
following calibration. Step-by-step instructions and advanced calibration software are available
from the factory.
34
20. SCALE METER SPECIFICATIONS
Meter Display
Type ....................................5 LED, 7-segment, 14.2mm (.56") high digits & 3 LED indicators
Color....................................................................................................................Red or green
Range.................................................................... -99999 to +99999 and -99990 to +99990
A to D Conversion
Technique (Pat.5,262,780) ........................................................................ Concurrent SlopeTM
Read Rate ............................................................... 60/s for 60 Hz NMR, 50/s for 50 Hz NMR
Output Update Rate .....................................................................56/s at 60 Hz, 47/s at 50 Hz
Display Update Rate .....................................................................3.5/s at 60 Hz, 3/s at 50 Hz
Noise Rejection
CMV from DC to 60 Hz................................................................................Withstand 250Vac
Dielectric strength....................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
CMR from DC to 60 Hz ................................................................................................ 130 dB
NMR at 50/60 Hz...............................................................90 dB with minimum digital filtering
Control Inputs (CMOS/TTL levels, logic 0 = tied to digital ground, logic 1 = open)
/ Hold input ..........................................................................Logic 0 holds display and outputs
/ Peak ...........................................................................................Logic 0 displays peak value
/ Tare.................................................................................. Logic 0 offsets input value to zero
/ Tare Reset..........................................................................Logic 0 resets Tare value to zero
/ Meter Reset....................................................................... Logic 0 resets all meter functions
/ Function Reset ..........................................................Logic 0 resets peak values and alarms
/ Display Blank..............................................................................Logic 0 shuts off the display
/ Display Item............................................................................. Logic 0 displays Gross value
Power Requirements
Input Voltage rating (standard) .........85-264 Vac or 90-300 Vdc (DC range not UL approved)
Input Voltage rating (low voltage option) ............................................12-32 Vac or 10-48 Vdc
Power Line Frequency ................................................................................. DC and 47-63 Hz
Power Consumption, Max ........................................................................................... 5 Watts
Excitation Outputs
Voltage & Current Levels (jumper selectable) .................................. 5 Vdc ±5%, 100 mA max
....................................................................................................... 10 Vdc ±5%, 120 mA max
........................................................................................................ 24 Vdc ± 5%, 40 mA max
Excitation Output Ripple.....................................................................................100 mVp max
Isolation from power and outputs ............................................................................... 250 Vac
Insulation dielectric strength to power and outputs..... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
Isolation to signal common ........................................................................................... 50 Vdc
35
DC, Process, Strain Signal Conditioner
Range Resolution Resistance Zero Range Span Range Error
200.00 mV
2.0000 V
20.000 V
10 µV
100 µV
1 mV
1 GΩ
-99999 to
99999
0 to ±99,999
0.01% of FS
±2 cts at 25°C
Load Cell Signal Conditioner
Range Resolution Resistance Zero Range Span Range Error
20.000 mV
50.000 mV
100.00 mV
250.00 mV
500.00 mV
1 µV
2.5 µV
5 µV
12.5 µV
25 µV
1 GΩ
-99999 to
99999
0 to ±99,999
0.01% of FS
±2 cts at 25°C
Dual Relay Options
Power to Relay Option ................................................................................Powered by meter
Setpoint Setup....................................................... Via front panel pushbuttons or RS232/485
Update Rate .................................................................................56/s at 60 Hz, 47/s at 50 Hz
Response to input signal (min) ..................................................................Display update rate
Input Signal (selectable)...................................... Net, Gross, filtered or unfiltered input signal
Actuation Modes (selectable) ...... Above or below setpoint, latching or non-latching, disabled
Output Time Delay (selectable) .................................................................... 1 to 128 readings
Front Panel Enable / Lockout Modes (selectable) ................1) Display and change setpoints
...................................................................................2) Display but do not change setpoints
..................................................................................3) Neither display nor change setpoints
Alarm Status Indication ................................................................................. 2 red LED lamps
Status Indication Setup (selectable) .......................Lit when output is ON or OFF, or disabled
Form C, SPDT Relay Output:
AC Rating......................................................................................................... 8A @ 240 Vac
DC Rating........................................................................................................... 8A @ 24 Vdc
Isolation rating between signal common and contacts ............................................... 250 Vac
Insulation dielectric strength between signal common and contacts ........................................
................................................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
Form A, SPST Solid State Relay Output:
AC Rating..................................................................................................130 mA @ 140 Vac
DC Rating..................................................................................................130 mA @ 180 Vdc
Isolation rating between signal common and contacts ............................................... 250V ac
Insulation dielectric strength between signal common and contacts ........................................
................................................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
Analog Output Option
Power to Analog Output Option...................................................................Powered by meter
Output Levels ............................................................. 0-20 mA, 4-20 mA, 0-10V, -10 to +10V
Voltage Compliance, 0-20 mA Output .................................................. 12V (0-600 Ohm load)
Current Compliance, 0-10V, -10 to +10V Output.......................2 mA (5 kOhm or higher load)
36
Accuracy .......................................... Meter input accuracy ±0.02% of full scale analog output
Resolution ...........................................................................................16 bit (1 part in 65,536)
Response Time ....................................................................................... 50/60Hz update rate
Scaling of Reading for Zero Output ........................................................... -99,999 to +99,999
Scaling of Reading for Full Scale Output.................................................. -99,999 to +99,999
Isolation rating between signal common and analog output....................................... 250V ac
Insulation dielectric strength between signal common and analog output................................
................................................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
Serial Interface Option (USB, RS232, RS485, RS485-Modbus boards)
Output Types................................................................RS232, RS485, RS485-Modbus, USB
.......................................... USB-to-RS485 converter, Ethernet, Ethernet-to-RS485 converter
Power to Interface Option............................................................................Powered by meter
RS485 Wiring ............................................................................................... Half or full duplex
Baud Rates ............................................................ 300, 600, 1200, 2400, 4800, 9600, 19200
Serial Protocols ............................. Custom ASCII, Modbus RTU, Modbus ASCII (selectable)
Signal Levels ................................................. Meet RS232, RS485, USB, Ethernet standards
Isolation rating between signal common and serial I/O .............................................. 250V ac
Insulation dielectric strength between signal common and serial I/O .......................................
................................................................................... 3.5 kV ac for 5 sec, 2.3 kV ac for 1 min
Option Board Connectors:
RS232 ..................................................................................................... Single RJ11 jack
RS485 ...................................Two RJ11 jacks (for daisy chaining with 6-wire data cables)
RS485 Modbus......................Two RJ45 jacks (for daisy chaining with 8-wire data cables)
USB.......................................................................................................... USB type B plug
USB-to-RS485 converter............................USB type B plug plus RJ11 jack to RS485 bus
Ethernet.........................................................................................Single RJ45 to Ethernet
Ethernet-to-RS485 converter..............RJ45 jack to Ethernet plus RJ11 jack to RS485 bus
Environmental
Operating Temperature .........................................................................................0°C to 55°C
Storage Temperature ........................................................................................ -40°C to 85°C
Relative Humidity ...................................................... 95% from 0°C to 40°C, non-condensing
Case............................ NEMA-4X (IP65) from front when panel mounted (not verified for UL)
Shock ........................................................................... 10 G at 1 kHz, applied in X, Y, Z axes
Vibration ............................................. 15 Hz to 150 Hz, 1 mm to 2 mm amplitude, 20 G max.
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21. GLOSSARY OF TERMS
Adaptive Filter Threshold
A threshold which causes an adaptive moving average filter to be reset to the
latest reading when the accumulated difference between individual readings
and the filtered reading exceeds that threshold. Adaptive moving average
filtering allows a meter to respond rapidly to actual changes in signal while
filtering out normal noise. The accumulated difference is also reset to zero
when the latest reading has a different polarity than the filtered reading. A low
adaptive filter threshold is normally selected. A high filter threshold should be
selected if the signal has large transients.
Alarm, Latched
An alarm which stays actuated until reset.
Latched alarms can shut down machinery or
a process when an operating limit has been
exceeded, or maintain an alarm condition
until acknowledged by an operator.
Alarm, Non-latched
An alarm which changes state automatically
when the reading rises above a specified limit
and changes back automatically when the
reading falls below a limit.
Autofilter A selectable digital filter mode which auto-
matically selects an appropriate moving average filter time constant from 0.08 sec to 9.6
sec for the encountered noise condition.
Auto-tare A selectable meter operating mode, where
the first reading following power-on or meter
reset is used to zero the display. Further
readings are then relative to this new zero.
Auto-zero An auto-zero limit from 0 to 9 counts can be programmed to compensate for
load cell drift. Whenever the meter comes to rest within that limit from zero, it
will auto-zero. Auto-zero can be enabled or disabled.
Batch Average Filter
A digital filter mode which averages 16 readings and then displays the average.
Readings are taken at 60/sec with 60 Hz power and 50/sec with 50 Hz power.
Counts The reading displayed on the panel meter ignoring the decimal point.
Count-by A settable scale meter parameter which allows readings to be rounded to 1, 2,
5, 10, 20, 50 or 100 counts. For example, set the count-by to 10 to read weight
to the nearest 1 lb if each count is 0.1 lb.
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Custom ASCII Protocol
A simplified, short protocol for use with these panel meters. It allows 31 digital
addresses. Not an industry-standard protocol, like the more complex Modbus
protocol, which is also offered with the meters.
Display Blank A rear panel input which blanks the display when the input is tied to logic
ground by a switch or 0V is applied (logic level true). The meter display will light
when the input is open or is held at +5V (logic level false).
Dribble A settable scale meter parameter in counts
which allows a flow to be shut off before the
setpoint value has been reached. For example, set the setpoint to 100.0 (1000 counts)
and the dribble factor to -50 counts to turn off
the fill of a 100.0 lb bag at 95.0 lbs if the shutoff system is known to dribble another 5.0 lbs
following shut-off.
Full Scale The maximum input signal range for which
the meter has been configured. For example,
the most sensitive full scale for the load cell meter is ±20 mV (signal range from
-20 mV to +20 mV).
Function Reset
A rear panel control input which resets Peak, Valley and any latched alarms
when the input is tied to logic ground by a switch or 0V is applied (logic level
true). To reset the value again, the input must be open or 5V applied (logic
level false) and then set low.
Ground Loop A closed conductive path in external ground wiring that allows stray currents to
flow in ground wiring, creating ground noise. The meters in this manual
minimize ground loop problems by mutually isolating the grounds associated
with meter power, signal input, and all output and communication options.
Jumper A push-on component which provides a short between two adjacent posts on a
circuit board. For example, jumpers are used to configure signal conditioner
boards for different signal types and full-scale ranges. Unused jumpers are
stored by pushing one side over an unused post.
Hysteresis Band
A band which controls relay action symmetrically around a setpoint. The relay
closes (or opens) when the reading goes above the setpoint plus one hysteresis limit, and opens (or closes) when the reading falls below the setpoint less
one hysteresis limit. A narrow hysteresis band is often used to minimize relay
chatter around a setpoint due to electrical noise or signal feedback caused by
load switching. A wide hysteresis band can be used for control applications,
such as turning on a fill pump when the tank level has reached a lower limit and
shutting off the pump when the tank level has reached an upper limit. The
hysteresis band will be equal to two hysteresis limits.
Menu Mode The meter programming mode used for input and range selection, meter setup,
and meter configuration. Entered into from the Run mode by pressing the
MENU key. The Menu mode can be locked out completely by a jumper.
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Meter Hold A rear panel input which freezes the meter display and all meter outputs while
that input is tied to logic ground by a switch or is held at 0V (logic level true).
The meter will resume operation when the input is allowed to float or is held at
+5V (logic level false).
Modbus An industry-standard serial communications protocol which allows devices by
different manufacturers to be digitally addressed by a PC on the same communication line, with up to 247 digital addresses. More complex than the
Custom ASCII protocol, which is also supported by these meters.
Moving Average Filter
A digital filter mode which displays a weighting moving average of readings.
Readings are taken at 60/sec with 60 Hz power and 50/sec with 50 Hz power.
Display update rates remain 3.5/sec with 60 Hz power and 3.0/sec with 50 Hz
power. There are eight moving average modes:
Old average x 1/2 + new reading x 1/2 (equivalent to 0.08 sec RC time constant).
Old average x 3/4 + new reading x 1/4 (equivalent to 0.15 sec RC time constant).
Old average x 7/8 + new reading x 1/8 (equivalent to 0.3 sec RC time constant).
Old average x 15/16 + new reading x 1/16 (equivalent to 0.6 sec RC time constant).
Old average x 31/32 + new reading x 1/32 (equivalent to 1.2 sec RC time constant).
Old average x 63/64 + new reading x 1/64 (equivalent to 2.4 sec RC time constant).
Old avg. x 127/128 + new reading x 1/128 (equivalent to 4.8 sec RC time constant).
Old avg. x 255/256 + new reading x 1/256 (equivalent to 9.6 sec RC time constant).
Offset A constant adder used for the displayed reading. This is the term b in the
straight line formula y = mx + b, where y is the displayed reading in counts, m
is the scale factor, x is the measured reading in counts, and b is the offset. For
direct readout in (milli)volts or (milli)amps, offset is 0.
Peak Display The maximum (or most positive) reading since that maximum was last reset.
Reset can be via the meter front panel, an external input, or a software
command. The displayed value can reflect the filtered or unfiltered readings.
Process Signal
A signal whose display requires setup of scale and offset settings for display in
engineering units. A classical process signal is 4-20 mA, where the 4 mA and
20 mA end points can each correspond to a desired meter reading.
Reading The value displayed by the meter. “Taking a reading” is the action of the meter
to make an analog-to-digital conversion. Readings are taken at 60/sec with 60
Hz power or 50/sec with 50 Hz power, and are displayed with an update rate of
3.5/sec with 60 Hz power or 3.0/sec with 50 Hz power.
Remote Display
A display mode which allows the meter to serve as a remote display to another
meter when connected to it by a 4-wire phone cord. Also allows the meter to
transmit raw measurement data to a computer and then display processed data
from the computer. A serial communications option board is required in the
meter. If such a board is not installed or no serial data is received, the meter
displays rESEt.
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Reset There are three types of Reset:
Peak Reset. Achieved by simultaneously pressing the RESET and PEAK
keys.
Latched Alarm Reset. Achieved by simultaneously pressing the RESET and
ALARMS keys.
Meter Reset. Causes the meter to reinitialize and take a tare reading when
set up for auto-tare. Achieved powering up the meter, by pressing the
RESET and MENU keys simultaneously, stepping through all top-level
menu choices, grounding a rear panel connector, or supplying an ASCII
command. rESEt is displayed briefly.
RS485 Half Duplex
Serial communications implemented with two wires, allowing data transmission
in both directions, but not simultaneously.
RS485 Full Duplex
Serial communications implemented with four wires, allowing data transmission
in two directions simultaneously.
Run Mode The normal operating mode of the meter,
where readings are taken, as opposed to the
menu mode.
Scale A constant multiplier used to go from A/D
converter counts to displayed counts. This is
the slope term m in the straight line formula
y = mx + b, where y is the displayed reading
in counts, m is the scale factor, x is the
measured reading in counts, and b is the
offset. For direct readout in (milli)volts or
(milli)amps, scale is 1.
Scaling The process of setting scale and offset so that the meter reads properly in
engineering units (such as psi).
Scaling, Coordinates of 2 Points Method
A scaling method where four numbers are entered manually: low input, desired
reading at low input; high input, and desired reading at high input. The meter
then applies a straight line fit. The decimal point is set by the separate dEC.Pt
menu item.
Scaling, Scale and Offset Method
A scaling method where scale and offset are entered manually.
Scaling, Reading Coordinates of 2 Points Method
A scaling method, where the low and high input values are determined from
actual signals. A known low signal is first applied to the meter, such as the
output of a pressure transducer at zero pressure. That signal is captured as the
low input value, and the desired low reading is entered. A known high signal is
then applied, such the output of a transducer for a know weight or pressure.
That signal is captured as the high input value, and the desired high reading is
entered. The meter then applies straight line fit. This scaling method has the
advantage of calibrating the transducer and meter as a system. The actual
- 41 -
voltage or current at either point does not need to be known. The decimal point
is set by the separate dEC.Pt menu item.
Setpoint A value compared to the reading to determine the state of a relay. Term often
used interchangeably with “alarm setpoint.” The relay action can by latching or
non-latching, utilize a hysteresis band, or utilize a deviation band. Hysteresis
bands and deviation bands are specified by two symmetrical limits around the
setpoint.
Span The number of counts corresponding to a given signal range.
Tare A rear panel input which causes the display to be set to zero when the input is
momentarily tied to logic ground by a switch or is held at 0V (logic level true) for
a minimum of 50 ms. When the input is allowed to float or is held at +5V (logic
level false), the meter displays readings relative to this new zero. A common
application is in weighing, where an external Tare button is pressed to read the
weight of an empty scale (tare), and tare is then automatically subtracted as a
constant from gross weight for display of net weight. Tare can also be used for
other applications where a reading relative to starting point is desired.
Zero When used with process meters, zero is an adjustment so that a given low
transducer output reads zero on the meter. Zero is adjusted by programming
offset.
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22. WARRANTY
Laurel Electronics Inc. warrants its products against defects in materials or workmanship for a
period of one year from the date of purchase.
In the event of a defect during the warranty period, the unit should be returned, freight prepaid
(and all duties and taxes) by the Buyer, to the authorized Laurel distributor where the unit was
purchased. The distributor, at its option, will repair or replace the defective unit. The unit will be
returned to the buyer with freight charges prepaid by the distributor.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from:
1. Improper or inadequate maintenance by Buyer.
2. Unauthorized modification or misuse.
3. Operation outside the environmental specifications of the product.
4. Mishandling or abuse.
The warranty set forth above is exclusive and no other warranty, whether written or oral, is
expressed or implied. Laurel specifically disclaims the implied warranties of merchantability
and fitness for a particular purpose.
EXCLUSIVE REMEDIES
The remedies provided herein are Buyer’s sole and exclusive remedies. In no event shall
Laurel be liable for direct, indirect, incidental or consequential damages (including loss of
profits) whether based on contract, tort, or any other legal theory.
Copyright 1993-2013 Laurel Electronics, Inc. Rev 24 May 2013
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