Spot Size Fill Factor; Temperature Sub Range; Temperature Unit; Analog Output - KPM PROCESS SENSORS METIS M308 User Manual

METIS M308 / M309 / M313 / M316 / M318 / H309 / H316 / H318 (12-pin)
|INFO|
Emissivity, transmittance and spot size fill factor are directly related to each other, the result of the mul-
tiplication of the 3 parameters has to be minimum 5%. If the multiplication of the 3 parameters falls below 5%,
the values are displayed in red in the SensorTools control window (see 7.3.1).

6.3.5 Spot Size Fill Factor

Measurements of objects that are smaller than the pyrometer's spot size can be performed when measuring
hot objects in front of a cold background. In this case the fill factor specifies how much percent the measuring
field is filled (see also
|INFO|
Emissivity, transmittance and spot size fill factor are directly related to each other, the result of the mul-
tiplication of the 3 parameters has to be minimum 5%. If the multiplication of the 3 parameters falls below 5%,
the values are displayed in red in the SensorTools control window (see 7.3.1).

6.3.6 Temperature Sub Range

The temperature range can be scaled down in order to adapt it to specific measurement conditions (minimum
range 51°C / 124°F), e.g. to configure the automatic clear function of the maximum value storage (see 6.3.2).

6.3.7 Temperature Unit

The temperature display can optionally be displayed in °C or °F.

6.3.8 Analog Output

The 2 analog outputs can be set separately:
▪ Depending on the connected devices to 0–20 mA or 4–20 mA
▪ Analog output 1 always provides the measured temperature (the temperature displayed on the device and
in the control window of SensorTools; see
|INFO|
With older firmware versions, the same settings are possible as at analog output 2. A firmware up-
date to the latest version eliminates this possibility and prevents, that the output of analog output 1 is acci-
dentally different to the displayed temperature signal. Firmware update see section 8).
▪ Analog output 2 can be assigned to provide different signals:
- Measured temperature: Temperature of the device display or control window in SensorTools
- Device temperature:
- Control output:
- No output

6.3.9 Test Current

On the device itself and via software a test current can be set to the output. Via software this current is adjusta-
ble, on the pyrometer the current is fixed to 10 mA (at 0–20 mA) or 12 mA (at 4–20 mA).

6.3.10 Upscale-Burnout (only via software SensorTools)

In case of sudden shadowing of the pyrometer's visual field, the output current is set to 20 mA instead of usu-
ally the lowest.
▪ Disabled Upscale-burnout (standard): The analog output at sudden shadowing of the pyrometer's view
field is the lowest current (0 or 4 mA).
▪ With enabled upscale-burnout function, the analog output at sudden shadowing of the pyrometer's view
field is set to the maximum current of 20 mA. This can be desirable, for example, in a furnace monitoring
when the controller otherwise would recognize a cold oven and heat up fully and possibly burn out the oven.
5.4 Alignment to the Measuring Object).
7.3.1
Internal device temperature output
Manipulated variable on models with PID controller
No signal is on the output
Control window).
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