METIS M311 / M322 / H311 / H322 (17-pin)
Pyrometer Parameters / Settings
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6.8 Temperature Sub Range
The temperature range can be scaled down in order to adapt it to specific measurement conditions
(minimum range 51°C), e.g. to configure the automatic clear function of the peak picker (see 6.7). A
modified temperature range also can be set for the analog outputs to increase the resolution even fur-
ther.
6.9 Customize Analog Output
The analog outputs can be set independently of the temperature sub range. They can be set to range
limits between 0 and 6000°C or °F, even if the pyrometer does not cover these ranges.
Limit the analog output: if the analog output is set smaller than the pyrometer’s temperature range,
the resolution of the analog output is increased even further.
Enlarge the analog output: Entering a larger range as the pyrometer’s range will scale the output.
The output at the beginning of temperature range is 0 or4 ma, at the end of the pyrometer’s tempera-
ture range the current output is that corresponding to the enlarged temperature range.
Example: 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 does not measure the tempera-
ture in the software shows UNDER. At the analog output
(e.g. set to 0-20 mA) the output current is 0 mA as long as
750°C is reached, then 1.25 mA will be applied to the output.
From 2500°C a consistently current is applied that would be
present at a 600–3000°C device at 2500°C.
6.10 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 (always the temperature, displayed in
the control window in SensorTools (see 7.2.2 Control window).
(Note: With older firmware versions, the same settings are possible as at analog output 2. A firmware
update to the latest version eliminates this possibility and prevents, that the output of analog output 1
is accidentally different to the displayed temperature signal. Firmware update see section 8).
Analog Output 2 can be assigned to provide different signals:
- 2-color temperature: 2-color temperature output
- Temperature channel 1: Channel 1 temperature output
- Temperature channel 2: Channel 2 temperature output
- Device temperature: Internal device temperature output
- Control output: Manipulated variable of the PID controller
- No output No signal is on the output
6.10.1 Test Current
On the device itself and via software a test current can be set to the output. Via software this current is
adjustable, on the pyrometer the current is fixed to 10 mA (at 0–20 mA) or 12 mA (at 4–20 mA).
6.10.2 Upscale-Burnout
In case of sudden shadowing of the pyrometer’s visual field, the output current is set to 20 mA instead
of usually 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.
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