Alarms - optris CTratio Operator's Manual

Fiber optics ratio thermomete

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Alarms

The CTratio has the following Alarm features:

Visual Alarms

These alarms will cause a change of the color of the LCD display and will also change the status of the

optional relays interface.

Digital Alarm 1 and 2

Both of the I/O pins can be programmed as alarm output. In this case the pin acts as an open collector

output (24 V/ 1A).

The following signal sources can be selected:

T 2C/ T 1C/ Attenuation/ TBox/ TProcess (Temperature signal which has been selected for the analog

output)

For a setup of the alarm values, selection of the signal sources and definition as high or low alarm (via change of

normally open/ closed) the programming interface (USB) including the software is needed.

Different wirings of the open collector output

All alarms have a fixed hysteresis of 2 K.

optris CTratio – E2013-04-A

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