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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 Slope
TM
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
Содержание LAUREATE LW20201SG1
Страница 27: ...27 SERIAL CONNECTION EXAMPLES...
