Overview
The 4WHB10K provides the completion resistor required for four-wire half-bridge measurements. This module should be used with sensors that have a 10 kΩ resistance.
Read MoreBenefits and Features
- Makes accurate measurement of 10-kohm, 4-wire half bridges simple
- Easy to install or remove
- Connects directly into data logger input terminals
- Compatible with most Campbell Scientific data loggers
Images
Detailed Description
4WHB10K Schematic
4WHB10K-to-Sensor Hookup
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Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Data Loggers
| Compatible | Note | |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR300 (retired) | ||
| CR3000 (retired) | ||
| CR310 | ||
| CR350 | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
Miscellaneous
| Compatible | Note | |
|---|---|---|
| CR9050 (retired) |
Additional Compatibility Information
Data Logger Considerations
The 4WHB10K uses two sequential differential analog inputs; the first differential channel must have an adjacent analog ground channel to accept the "ground prong" of the 4WHB10K. 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
The 4WHB10K is measured either with CRBasic's BrHalf4W Instruction or Edlog's Instruction 9 (Full-Bridge with Excitation Compensation).
Specifications
| Used With | 4-wire half bridge measurements with a 10 kΩ resistance |
| Resistance | 10 kΩ (bulk metal foil) |
| Tolerance | ±0.01% (@ 25°C) |
| Maximum Temperature Coefficient | ±0.8 ppm/°C |
| Power Rating | 0.25 W (@ 70°C) |
| 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) |
Related Documents
FAQs for
Number of FAQs related to 4WHB10K: 3
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Yes. The 3WHB10K is required to measure three-wire temperature probes on the AM16/32B. As both RTDs and thermistors can be measured on the 3WHB10K, refer to the AM16/32B Relay Multiplexer Instruction Manual for the proper programming.
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Yes. The CR1000 can measure eight PT100 sensors with a 3WHB10K terminal input module. The measurement instructions, however, have to reflect that more than one sensor is being excited with the same excitation channel (MeasPEx argument) in the BrHalf() or BrHalf3W() instruction.
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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.