4WPB1K
4WPB1K
Orderable1-kohm, Four-Wire PRT Bridge Terminal Input Module
Overview
The 4WPB1K provides completion resistors to enable your Campbell Scientific data logger to measure 1000-ohm platinum resistive thermometers (PRT).using the half-bridge four-wire measurement method.
Technical Description
4-Wire PRT Bridge Module Schematic
(Rf=1 kΩ for the 4WPB1K)
4WPB1K-to-Sensor Hookup
Benefits
- Provides high-accuracy completion resistor and convenient wiring for four-wire, 1000-ohm PRT measurements
- Easy to install or remove
- Connects directly into data logger input terminals
- Compatible with most Campbell Scientific data loggers
Specifications
- Used With
- 1 kΩ platinum resistive thermometer (PRT)
- Dimensions
- 1.5 x 1.5 x 2.7 cm
(0.6 x 0.6 x 1.0 in.) for body with prongs
- Weight
- 6 g
(0.2 oz)
Current Limiting
- Resistance
- 10 kΩ
- Tolerance
- ±5%
(@ 25°C)
- Power Rating
- 0.25 W
Completion Resistor (bulk metal foil)
- Resistance
- 1 kΩ
- Tolerance
- ±0.01%
(@ 25°C)
- Maximum Temperature Coefficient
- ±0.8 ppm/°C
- Power Rating
- 0.25 W
(@ 70°C)
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Compatibility
Data Logger Considerations
The 4WPB1K consumes two adjacent differential analog inputs; the first channel requires an adjacent analog ground channel to accept the "ground prong" of the 4WPB1K. Not all data logger terminal strips have this sequence on all channels, so please check your data logger's wiring panel to confirm channel assignments, especially if you plan to use multiple terminal input modules.
Newer CR10X Wiring Panels and the CR10XTCR Thermocouple Cover are deep enough to cover the data logger input channels with a terminal input module attached; older CR10TCRs are not deep enough.
Programming
When using CRBasic, the 4WPB1K is measured with the BrHalf4W Instruction followed by the PRT Instruction. When using Edlog, the 4WPB1K is measured with Instruction 9 (Full Bridge w/ Measured Compensation) followed by Instruction 16 (Temperature RTD).
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