Overview
The 4WPB100 provides completion resistors to enable your Campbell Scientific data logger to measure 100-ohm platinum resistive thermometer s(PRT) using the half-bridge four-wire measurement method.
Read MoreBenefits and Features
- Provides high-accuracy completion resistor and convenient wiring for four-wire, 100-ohm PRT measurements
- Easy to install or remove
- Connects directly into data logger input terminals
- Compatible with most Campbell Scientific data loggers
Images
CAD Files:
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Detailed Description
4-Wire PRT Bridge Module Schematic
(Rf=100 Ω for the 4WPB100)
4WPB100-to-Sensor Hookup
Specifications
| Used With | 100 Ω 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 | 100 Ω |
| Tolerance | ±0.01% (@ 25°C) |
| Maximum Temperature Coefficient | ±0.8 ppm/°C |
| Power Rating | 0.25 W (@ 70°C) |
Compatibility
Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
Data Loggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR1000X | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR300 | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR350 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Measurement and Control
| Product | Compatible | Note |
|---|---|---|
| Granite Volt 108 | ||
| Granite Volt 116 |
Additional Compatibility Information
Data Logger Considerations
The 4WPB100 uses two adjacent differential analog inputs; the first channel requires an adjacent analog ground channel to accept the "ground prong" of the 4WPB100. 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 4WPB100 is measured with the BrHalf4W Instruction followed by the PRT Instruction. When using Edlog, the 4WPB100 is measured with Instruction 9 (Full Bridge w/ Measured Compensation) followed by Instruction 16 (Temperature RTD).
Frequently Asked Questions
Number of FAQs related to 4WPB100: 3
Expand AllCollapse All
-
Only one 4WPB100 is needed to measure the internal PRT in the radiometer.
-
The CR1000 requires a 4WPB100 to measure the internal PRT. (Data loggers such as the CR3000 and CR5000 have the necessary PRT bridge module built in to measure the PRT.) Note that the CNR4-L also includes an internal thermistor, which can be directly measured by the CR1000. Because of this, when using a CR1000, Campbell Scientific typically recommends monitoring the internal temperature of the CNR4-L using its internal thermistor instead of the PRT.
-
The 4WPB100, 4WPB1K, and 4WHB10K terminal input modules can be used instead of the 3WHB10K module. However, ensure that the jumper is installed between the ground side of the sensor and the low input of the second channel to maintain the four-wire accuracy.
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