The ES650 measures temperatures and analog input voltages each with 8 channels. All 16 channels are electrically isolated from each other and from the supply voltage to achieve a consistently high common-mode rejection, thus ensuring maximum measurement accuracy even at extremely low voltages and non-potential-free thermocouples.

A separate ice point reference at each input connector significantly minimizes the measurement error, even when ambient temperatures are fluctuating. The ES650 supports type B, E, J, K, N, R, S, and T thermocouples covering a measuring range of -210°C to +1820°C (-346°F to +3308°F). The module operates at a resolution of 21 bit over the entire range, which allows a minimum measurement unit of 0.01°C with a basic accuracy of +0.25°C (K type). At a resolution of 16 bit, two selectable measuring ranges are available for high precision voltage measurements. The ES650 reaches a basic voltage measurement accuracy of up to 2 mV. To maintain the high precision even at large fluctuations of the ambient temperature, the measuring module has an ultra-low temperature coefficient of only 10 ppm/°C. To avoid capturing redundant data, the ES650 allows the software filter and sampling rate to be optimized individually for each module.

Functions at a Glance

• 8 electrically isolated measuring channels for analog voltages
• 8 electrically isolated measuring channels for temperature sensor types B, E, J, K, N, R, S, T
• Measuring channels electrically isolated from the supply voltage
• Adjustable acquisition rate per channel
• Individual A/D converters per channel and synchronous sampling ensure zero delay between channels
• Parameterized software filter for signal smoothing
• High measuring accuracy through 16 bit (A/D) or 21 bit (thermal) resolution
• Two selectable measuring ranges of +10 V and +60 V
• Automotive measuring range of -210°C to +1820°C (-346°F to +3308°F)
• Data transfer to PC or ES600 via Ethernet
• Rugged, functional metal housing
• Hardware calibration service