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Model 420L - Specifications
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- Accommodates up to 5000 V Cable Voltage
- Extended Temperature Range
- Light Weight
- Small Size
- Encapsulated Shock Resistance
- Metal Encased
- Isolated Two-Wire Transmitters
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- Fast, Reliable Response
- Low Cost Industrial Monitor
- Current Overload Protection
- Never Requires Calibration
- Complete Electrical Isolation
- Single Supply Voltage
- Supply Reversal Protection
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STANDARD CURRENT RANGES:
A.C. Amps, RMS
0-50, 0-100, 0-150, 0-200, 0-250, 0-300
PRICE: $305 (Standard Range)
$330 (Non-Standard Range)
MAX WEIGHT: 8 OZ.
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PERFORMANCE SPECIFICATION
With Optimum Load Resistance |
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| Accuracy | 0.2% (Standard) |
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| Repeatability | 0.1% Full Scale |
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| Response Time | 150 Milliseconds Maximum |
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| Temperature Range | -25 deg. C to 85 deg. C |
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| Temperature Coefficient | 0.04% F.S./ deg. C |
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| Conductor Cable Voltage | 5000 Volts (Insulated Cable) |
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| Supply Voltage | 5 to 40 V.D.C. |
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| Signal Out | 4 to 20 mA |
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| Frequency | Nominal 50 / 60 Hz |
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| CONNECTION SPECIFICATION |
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| Conductor Cable Size | Up To 1.10" diameter |
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| Isolation | Input/Output/Case |
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Insulation Resistance
(Between Output and Case) | 100 Meg. Ohm Min.
@500 V.D.C.
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CHARACTERISTIC CURVE
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OPTIMUM LOAD RESISTANCE
The optimum load resistance is actually the sum of the line resistance, receiver
resistances and added external load resistance. However, in many applications, the line resistance and receiver resistances are negligible in comparison to the added external load resistance. The following equation may apply:
| RL = ( VS - 5 ) X 40 Where: |
RL = Load Resistance in Ohms.
VS = Supply Voltage in Volts D.C.
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| Manufacturer maintains right to change specifications without notice; prices as of January 1, 2008. |
