538-8SC - 2 Pages

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538-8SC

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www.nokeval.com sales@nokeval.com Multipoint Indicator 538-8SC • 8 input channels • Thermocouples, RTD´s, 0/4..20 mA, 0..5/10V • Inputs user-selectable • Each channel has invidual input • 2 relay alarms as standard • 10 alarms as option • 8 output 0/4..20 mA as option • Serial port RS232 or RS485 as option • Power supply 220 VAC or 24 VDC The Nokeval multipoint indicator 538-8 is designed for applications, where display, output signals and alarms are desired simultaeously for several measurements. Each input channel may be configured individually. For example, the first channel can accept thermocouple, the second one Pt100, the third 4...20 mA and etc. The scanning interval of display is adjustable. The 538-8 provides 12 alarms, 2 relay alarms as standard and 10 alarms on an extra card. 538-8 employs 8 analog outputs, one isolated serial port RS232/485 and a second RS232 for a standard printer. The floating decimal point expands the display by showing small values with decimal point throughout the 0...9999 display of the meter. This function is enabled by 15 bit A/D converter, with resolution 1/ 32000. The autocalibration, once a second, eliminates drifts and long term changes of zero and range. No potentiometers are used for adjustments. Large field displays Sensors: Pt100 Thermocouples 0/4..20 mA 0/1..5/10V Potentiometers Recorder 5..8 analog outputs

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Voltage inputs Specification: Pt100 sensor: Range -200...+700 °C. Resolution 0.1 % or 1 °C. Accuracy 0.05 % or 0.2 °C by 3-wire connection. Max difference between channels 0.1 °C. Max. line resistance 100 Ω. Line resistance effects < 0.005%/Ω. 2- or 3-wire connections. Thermocouples: K, J, J/DIN, R, S. Accuracy 1 °C ± 1 digit, for types R, S 2 °C ± 1digit. Sensor wires have no effect below 1000 Ω. Cold junction compensation effects < 0.05 °C/°C. Fixed ranges, 20, 50, 500 and 1000 mV. Scaleable ranges 0-1/5/10 and 1-5V. Impedance 1 MΩ. Accuracy 0.05 % of span. Potentiometers: Standard ranges...

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