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The Laureate™ load cell and microvoltmeter is a
high-sensitivity monitor and controller for use with load
cells, strain gauges and microvolt input signals where high
accuracy and stability are required.
Usage as a DC microvoltmeter provides sensitivity down to 20
mV full scale with 1 µV resolution. With a digital
multiplier of five, 99,999 counts can be displayed with a
sensitivity of 0.2 µV per count. A moving average filter
with a time constant of 1.2 sec or greater should then be
selected.
Usage as a load cell meter allows six-wire hookup and
scaling for direct readout in engineering units, such as
pounds, kilograms or PSI. Scaling can be via front panel
pushbuttons or a computer. Zero may be set from -99,999 to
+99,999. Range may be scaled from 0 to ±99,999. Digital
scaling and calibration eliminate drift caused by
potentiometers in non-microcomputer based meters.
PLEASE SEE TECHNICAL INFORMATION - PDF FOR COMPLETE
INFORMATION |
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Features |
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20 mV - 500
mV full-scale ranges, 4- or 6-wire connection
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20, 50, 100, 250 & 500 mV ranges.
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5-digit resolution with span from 0 to
± 99,999
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Zero from -99,999 to
+99,999
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Selectable fixed
right-hand zero.
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Isolated 10 Vdc supply
to power up to four 350-ohm load cells in parallel.
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4- or 6-wire hookup.
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Ratiometric operation
to cancel variations in excitation supply.
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Up to 60 conversions
per second.
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Peak value display
(standard).
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Auto-tare with tare
value stored in memory.
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AC or DC powered.
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Green or red display.
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Choice of isolated
plug-in options for control and computer interface:
dual relays,
4-20 mA & 0-10 V analog output,
RS-232/485 I/O,
parallel BCD output,
low voltage AC & DC power.
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NEMA 4X, 1/8 DIN case.
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Certified to
UL 3101-1, CAN/CSA-C22.2, EN 61010-1 (CE Mark).
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Specifications |
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DC
Microvoltmeter Inputs |
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Input Range
mV |
Resolution |
Error at 25°C |
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±20.000
±50.000
±100.00
±250.00
±500.00 |
1.0 µV
2.5 µV
5.0 µV
12.5 µV
25 µV |
0.01% FS
±1 count |
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Load
Cell Inputs |
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Full-Scale
Input, mV |
Zero
Adjust |
Span
Adjust |
Error at 25°C |
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±20.000
±50.000
±100.00
±250.00
±500.00 |
-99,999
to
+99,999 |
0 to
±99,999 |
0.01% FS
±1 count |
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DC
Voltage & Current |
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Display |
Readout
Color
Range
Indicators |
5 digits, 7-segment, 14.2 mm (.56")
Red or green LED
-99999 to +99999 or -99990 to +99990
(count by 10 with rounding)
Minus sign, 2 red LED lamps |
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A-to-D Conversion |
Technique
A-to-D Rate
Output Update
Display Update |
Concurrent Slope™
(Pat 5,262,780)
60/s at 60 Hz, 50/s at 50 Hz
56/s at 60 Hz, 47/s at 50 Hz
3.5/s at 60 Hz, 3/s at 50 Hz |
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Accuracy |
Span Tempco
Zero Tempco |
0.0015% of reading/°C
0.1 µV/°C |
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Noise Rejection |
CMR, DC to 60 Hz
NMR at 50/60 Hz |
130 dB
90 dB with min filtering |
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Power |
Voltage, std.
Voltage, opt.
Frequency
Power isolation |
85-264 Vac and 90-370 Vdc
8-28 Vac and 9-37 Vdc
DC or 49-440 Hz
Safety-rated to 250 Vac, meter ground to
earth ground,
DC to 60 Hz, 4.2 kVp per High Voltage Test |
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Excitation Output |
5 Vdc
10 Vdc
24 Vdc
Output isolation |
5 Vdc ±5%, 100 mA max
10 Vdc ±5%, 120 mA max
24 Vdc ±5%, 50 mA max
50 Vdc to meter ground |
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Environmental |
Operating Temperature
Storage Temperature
Relative Humidity
Protection |
0°C to 55°C
-40°C to 85°C
95% at 40°C, non-condensing
NEMA-4X (IP-65) when panel mounted |
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