Description
The National Instruments USB-9211 Thermocouple Input Device, with part number 778976-01, is a high-resolution 24-Bit data acquisition tool that provides four channels for temperature measurement through its USB interface. This device consists of the USB-9161 Carrier and the NI-9211 module, which can be easily assembled without tools and is designed to be panel mountable for convenient installation.
Each of the four channels of the NI USB-9211 has a specific impedance between the TC- and COM terminals as well as the TC+ and COM terminals to ensure accurate measurements. The channels utilize a 24-bit Delta-sigma ADC for signal conversion, and a consistent current source is provided between the TC+ and TC- terminals to detect open thermocouple conditions.
To enhance measurement precision, the device includes an internal autozero channel that allows for the measurement of offset errors, which is particularly useful when operating in ambient temperatures outside the 15 °C to 35 °C range. Additionally, it features one internal cold-junction compensation channel to maintain accuracy across various temperature environments.
Compatibility with a range of thermocouple types, including types S, T, N, J, K, and B, makes the USB-9211 a versatile choice for diverse temperature sensing applications. Despite its obsolete status as declared by National Instruments, this device remains available for purchase and repairs through Apex Waves, ensuring continued support for users of this reliable thermocouple input device.
| Feature | Specification |
|---|---|
| Product Name | National Instruments USB-9211 Thermocouple Input Device |
| Part Number | 778976-01 |
| Resolution | 24-Bit |
| Number of Channels | 4 |
| Interface | USB |
| Components | USB-9161 Carrier and NI-9211 module |
| Mounting Option | Panel mountable |
| Channel Impedance | Impedance between TC- and COM, and TC+ and COM terminals |
| ADC Type | 24-bit Delta-sigma ADC |
| Current Source | Provided between TC+ and TC- terminals |
| Autozero Channel | Internal autozero for offset error measurement |
| Cold-Junction Compensation | One internal channel |
| Compatible Thermocouples | S, T, N, J, K, B, etc. |
| Obsolete Status | Declared by National Instruments, available for purchase and repairs by Apex Waves |
Question 1: What features of the National Instruments USB-9211 Thermocouple Input Device contribute to its precision in temperature measurement across different environmental conditions?
Answer 1: The internal autozero channel in the National Instruments USB-9211 Thermocouple Input Device is significant because it allows for the measurement of offset errors, ensuring enhanced measurement precision, particularly when the device is operated in ambient temperatures outside the standard range of 15 °C to 35 °C.
Question 2: What are the features and specifications that enable the National Instruments USB-9211 Thermocouple Input Device to provide precise temperature measurements, despite its obsolete status?
Answer 2: The National Instruments USB-9211 Thermocouple Input Device offers features such as a 24-bit Delta-sigma ADC for signal conversion, specific impedance channels for accurate measurements, an internal autozero channel for offset error measurement, cold-junction compensation for maintaining accuracy across different temperatures, and compatibility with multiple thermocouple types to ensure precise temperature measurements across various ambient conditions.
Question 3: What is the significance of the internal autozero channel in the National Instruments USB-9211 Thermocouple Input Device, especially when used in temperatures outside the 15 °C to 35 °C range?
Answer 3: The National Instruments USB-9211 Thermocouple Input Device ensures precise temperature measurements through its high-resolution 24-Bit Delta-sigma ADC, four-channel configuration with impedance specifications for accuracy, internal autozero channel for offset error measurement, cold-junction compensation channel for consistent readings across temperature variations, and compatibility with multiple thermocouple types including S, T, N, J, K, and B; despite its obsolete status, continued support and availability are provided by Apex Waves.
Question 4: What features of the National Instruments USB-9211 Thermocouple Input Device contribute to its versatility and accuracy in temperature measurement across various environments?
Answer 4: The National Instruments USB-9211 Thermocouple Input Device enhances precision in temperature measurement across varying environmental conditions by incorporating an internal autozero channel for offset error measurement, a consistent current source for open thermocouple detection, and an internal cold-junction compensation channel to maintain accuracy over a range of temperatures.
Question 5: What features does the National Instruments USB-9211 Thermocouple Input Device offer to ensure accurate temperature measurements across various ambient conditions?
Answer 5: The National Instruments USB-9211 Thermocouple Input Device boasts features such as four temperature measurement channels with specific impedance for accuracy, 24-bit Delta-sigma ADC for signal conversion, an internal autozero channel for offset error measurement, and cold-junction compensation for consistent accuracy across different temperatures, as well as compatibility with a variety of thermocouple types including S, T, N, J, K, and B, enhancing its versatility and precision in various temperature sensing applications.
