The manual provides service information for the HP Model 44421A and 44422A 20 Channel Relay Multiplexer Assemblies, detailing their setup, operation, and troubleshooting when used with the 3497A Data Acquisition/Control Unit. It explains the use of reed-relays for switching signals, the organization of channels, thermocouple compensation in the 44422A model, and the commands necessary for controlling the assemblies.
Overview
The product is a 20 Channel Relay Multiplexer Assembly available in two options: Option 010 (Model 44421A) and Option 020 (Model 44422A with Thermocouple Compensation). These assemblies are used with the 3497A Data Acquisition/Control Unit and/or 3498A Extender. Option 010 is used to switch up to 20 input signals, while Option 020 includes thermocouple compensation for temperature measurements. Both options use reed-relays to switch High, Low, and Guard lines, and can be used for precise low-level measurements. The manual provides service information and commands for controlling the assemblies.
Specifications
- OPTION 010
- MODEL 44421A
- 20 CHANNEL RELAY MULTIPLEXER ASSEMBLY
- OPTION 020
- MODEL 44422A
- 20 CHANNEL RELAY MULTIPLEXER ASSEMBLY WITH THERMOCOUPLE COMPENSATION
- 20 channel analog signal multiplexer
- Reed-relays for switching
- Two decades of 10 channels
- Low thermal offset characteristics
- Hardware or software compensated
- Measure outputs of up to 20 thermocouples
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download INFORMATION Manual (PDF – 95.3 KB)
HP-44421A-22A manual assists technicians in troubleshooting and calibrating the INFORMATION model efficiently. File size: 95.3 KB.
- Brand: Hp-44421a-22a-general
- Model: INFORMATION
- Type: Manual
- File size: 95.3 KB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download INFORMATION manual (PDF)