Contents

Revision and copyright information
Table of contents
1. Introduction
- 1.1 Typical applications
- 1.2 Compatibility
2. Precautions
3. Initial inspection
4. QuickStart
5. Overview
6. AM16/32B specifications
7. Installation
- 7.1 Wiring to data logger
  - 7.1.1 Control terminals
  - 7.1.2 COM terminals
  - 7.1.3 Measurement terminals
- 7.2 Grounding
- 7.3 Power supply
- 7.4 Installation in enclosure
8. Operation
- 8.1 Programming
  - 8.1.1 Short Cut programs
  - 8.1.2 Using CRBasic MuxSelect() instruction
  - 8.1.3 General programming considerations
  - 8.1.4 Mixed sensor types
- 8.2 General measurement considerations
  - 8.2.1 Long cable lengths
  - 8.2.2 Completion resistors
  - 8.2.3 Contact degradation
Appendix A. Importing Short Cut code into CRBasic Editor
Appendix B. Example measurements and programs
- B.1 Single-ended voltage measurement
- B.2 Differential voltage measurement
- B.3 Half-bridge measurement
- B.4 Full-bridge measurement
- B.5 CS616 measurement
Appendix C. Thermocouple measurement
- C.1 Measurement considerations
  - C.1.1 Reference junction
  - C.1.2 Data logger reference
  - C.1.3 AM16/32B reference
  - C.1.4 Thermal gradients
Limited warranty
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Safety
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Campbell Scientific AM16/32B Product Manual

Campbell Scientific AM16/32B Multiplexer manual cover

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Campbell Scientific AM16/32B Multiplexer Specification

The Campbell Scientific AM16/32B Multiplexer is a versatile device designed to expand the input capabilities of dataloggers, allowing for the measurement of multiple sensors. This multiplexer is capable of switching 16 differential or 32 single-ended channels, which makes it suitable for a wide range of environmental and industrial monitoring applications. The AM16/32B can handle a variety of sensor types, including thermocouples, thermistors, strain gauges, and other resistive sensors. It operates seamlessly with Campbell Scientific dataloggers, ensuring reliable data acquisition and integration. The device features a robust design that can withstand harsh environmental conditions, making it ideal for field deployments.

The multiplexer offers a low power consumption profile, which is critical for remote operations where power sources may be limited. Its construction allows for easy mounting and connection, with clear terminal labels and a straightforward wiring scheme. The AM16/32B supports advanced diagnostic features that facilitate troubleshooting and maintenance, enhancing the reliability of long-term data collection efforts. It can be configured using Campbell Scientific's software tools, providing flexibility in setting up measurement protocols and schedules.

The AM16/32B's switching speed and low thermal EMF characteristics ensure accurate and stable measurements, even in fluctuating temperature conditions. It is housed in a rugged, weather-resistant enclosure that protects the internal components from dust and moisture, further ensuring durability and longevity. This multiplexer is an essential component for expanding measurement capacity in projects requiring extensive data collection, offering a cost-effective solution for scaling up sensor networks. Overall, the Campbell Scientific AM16/32B Multiplexer is a highly reliable and efficient instrument for enhancing the capabilities of datalogging systems.

Campbell Scientific AM16/32B Multiplexer F.A.Q.

How do I connect the AM16/32B Multiplexer to a data logger?

To connect the AM16/32B Multiplexer to a data logger, use the provided cables to connect the control ports on the multiplexer to the corresponding control ports on the data logger. Ensure that the power supply voltage matches the multiplexer’s operational requirement.

What is the maximum number of sensors that can be connected to the AM16/32B Multiplexer?

The AM16/32B Multiplexer can connect up to 32 single-ended sensors or 16 differential sensors. This allows for efficient data collection from multiple sensors using a single data logger.

How can I troubleshoot communication issues with the AM16/32B Multiplexer?

Check all cable connections to ensure they are secure. Verify that the control ports are correctly connected to the data logger. Additionally, inspect the power supply and replace it if necessary. For persistent issues, consult the multiplexer’s manual for diagnostic procedures.

What maintenance is required for the AM16/32B Multiplexer?

Regular maintenance for the AM16/32B Multiplexer includes inspecting and cleaning connections, ensuring that all cables are tightly connected, and checking for any signs of wear or damage. Periodically check the calibration settings and update the firmware if necessary.

Can the AM16/32B Multiplexer be used in outdoor environments?

Yes, the AM16/32B Multiplexer can be used in outdoor environments; however, it should be housed in a weather-resistant enclosure to protect it from the elements. Ensure that all connections are sealed to prevent moisture ingress.

How do I configure the AM16/32B for use with thermocouples?

To configure the AM16/32B for thermocouples, connect the thermocouples to the appropriate input channels. Use a compatible data logger program to configure the multiplexer settings for thermocouple readings, ensuring correct temperature compensation is applied.

What should I do if the AM16/32B Multiplexer is not switching channels correctly?

If the AM16/32B is not switching channels correctly, verify that the control lines are properly connected and that the data logger is sending the correct signals. Check for any firmware updates and ensure that the multiplexer is not exceeding its operational limits.

How do I test the functionality of the AM16/32B Multiplexer?

To test the functionality, connect known voltage or resistance values to the inputs and verify that the readings are accurately recorded by the data logger. Utilize diagnostic tools available in the data logger’s software to test the switching and communication functions.

What are common causes of signal interference with the AM16/32B Multiplexer?

Common causes of signal interference include electromagnetic interference (EMI), improper grounding, and poor cable shielding. To minimize interference, use shielded cables, ensure proper grounding, and avoid running signal cables parallel to power cables.

How do I update the firmware on the AM16/32B Multiplexer?

To update the firmware, connect the multiplexer to a computer using a compatible interface. Download the latest firmware from Campbell Scientific’s website and follow the instructions provided in the firmware update tool to complete the process.