Scaling Analog Outputs (Only Via Sensortools Software); Interface Type (Only M3 Devices); Interface Baud Rate (Only M3 Devices) - KPM PROCESS SENSORS METIS M311 Operating Manual

6.2.10.3 Scaling Analog Outputs (only via SensorTools software)

The analog outputs can be scaled to suit special circumstances, e.g. for replacement with a device with a
larger measuring range.
▪ Increasing the temperature range beyond that of the pyrometer scales the analog output accordingly. It
should be noted that the pyrometer cannot measure outside of its measuring range and behaves differently
there, depending on the firmware version:
- M3 devices from firmware 01-2023 are switchable in the initial behavior:
It can be set what happens below the beginning of the temperature range, either 0 or 4 mA is provided to
the output, or the current that corresponds to that of the enlarged temperature range is provided to the
output constantly (as with all older firmware versions).
H3 units always operate according to the "Scaled current under ZSC" function.
- At the end of the pyrometer temperature range, the current that corresponds to the increased temperature
range is always provide to the output.
▪ Decreasing the scope of the temperature range can be made to increase the resolution of the output.
Example of increasing the scope of the temperature range: A pyrometer with temperature range 750–2500°C
should be adapted to the range 600–3000°C. In the range of 600–750°C, the pyrometer cannot measure yet; it
shows – – – – or in the software "Under".
▪ Analog option Scaled current below ZSC selected:
At the analog output set to
0-20 mA, a constant
1.25 mA is providing to the
output until 750°C is
reached, with 4-20 mA a
constant 5 mA is providing
to the output until 750°C is
reached.
From 2500°C the same current is providing to the output as a 600-3000°C device would providing to the out-
put at 2500°C, in the example this would be 15.83 mA at 0-20 mA and 16.66 mA at 4- 20mA.
▪ Analog option 0/4mA below ZSC selected:
At the analog output set to
0-20 mA, 0 mA is providing
to the output until 750°C is
reached, with 4-20 mA cor-
responding 4 mA. From
750°C the current then
jumps to that of the scaled
output of 1.25 mA at 0-20
mA or 5 mA at 4-20 mA.
From 2500°C the same current is providing to the output as a 600-3000°C device would providing to the out-
put at 2500°C, in the example this would be 15.83 mA at 0-20 mA and 16.66 mA at 4- 20mA.

6.2.11 Interface Type (only M3 devices)

Provides the interface to RS232 or RS485 (see

6.2.11.1 Interface Baud Rate (only M3 devices)

The baud rate is adjustable: RS232: 4.8 to 115.2 kBd; RS485: 4.8 to 921.6 kBd
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METIS M311 / M322 / H311 / H322 (12-pin device connector)
20 mA
15.83 mA
1.25 mA
0 mA
600 750
20 mA
15.83 mA
1.25 mA
0 mA
600 750
4.1.5 Serial Interface RS232 / RS485).
20 mA
16.66 mA
5 mA
4 mA
2500 3000°C 600 750
20 mA
16.66 mA
5 mA
4 mA
2500 3000°C 600 750
2500 3000°C
2500 3000°C