Thermocouple simulation module has 32 channels in one PXI slot
Up to 32 channels in a single PXI slot is offered by Pickering Interfaces. The company has introduced a low voltage output module designed for simulating the operation of a thermocouple. The 41-761 occupies a single PXI slot yet can provide up to 32 independently-isolated channels of thermocouple simulation. With ranges of ±20mV, ±50mV and ±100mV it is suitable for simulating any thermocouple type.
The 41-761 is available with a choice of 32, 24, 16 or eight channels. Each channel provides a low voltage output across two connector pins capable of providing ±20mV with 0.7 microV resolution, ±50mV with 1.7microV resolution and ±100mV with 3.3microV resolution, covering most thermocouple types. The use of two wire outputs and isolation from ground ensures that the 41-761 can be used to accurately simulate low voltages even in the presence of common mode voltages in the system. Each simulation channel can provide an open circuit setting to simulate faulty wiring connections to a sensor. For improved accuracy, each channel of the low voltage output carries accurate calibration data stored in EEPROM on the module. Regular calibration of the channels is not necessary, advises Pickering.
When used for thermocouple simulation the 41-761 can be connected straight into the measurement system, bypassing the need for isothermal blocks and cold junction compensation. To assist in this, Pickering also offers a 78-pin connector solution that has 32, 24, 16 or eight copper twisted pairs terminated with mini copper thermocouple plugs.
Pickering Interfaces designs and manufactures modular signal switching and simulation for use in electronic test and verification. All of the company’s manufactured products carry a standard three-year warranty and guaranteed long-term product support. The company’s switching and simulation products for PXI, LXI, and PCI applications are supported with cables and connectors, diagnostic test tools and application software and software drivers.
