Process Sensors Sensor Therm METIS M311 Operating Manual page 42

Various settings:
- Switching value: Activates the corresponding output at the set switching value (the LEDs 1-3 on the unit
indicate the activated state).
- Hysteresis: The hysteresis is the value at how many degree below the limit value the output is switched
back.
- Logic: The state of the digital outputs can be set:
- NO (normally open): outputs have in active state 24 volts to the pins and in inactive state 0 V
(output max. 50 mA, current limited internally).
- NC (normally closed): outputs have in active state 0 volts to the pins and in inactive state 24 V (output
max. 50 mA, current limited internally).
- Extended settings: Depending on the selection are either available:
Time settings: A verification time and a hold time can be set:
- Verification time: select "immediately" to activate the output function immediately when happening. A
time between 1 and 65535 ms delays the activation accordingly.
- Hold time: A time can set to remain activated output for a desired time.
- None: signal is active as long as the function is active
- Process start: signal is active up to the next start (of a program or manual start)
- Time value (between 1 and 65534 ms): signal is active for the entered time.
- Reference temperature: The 2-color temperature or the temperature of one channel can be used to acti-
vate the output.
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CAUTION
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can thus lead to an automatic startup of these systems.
Always observe all safety instructions of these systems!
Click on an output check box to activate the correspond-
ing output 1, 2 or 3 (only possible for selected digital
outputs). A green LED symbol signalizes the activation.
Digital inputs are marked with a green lamp symbol if
connected and active.
Activation of outputs 1, 2 or 3 will also activate the LEDs
on the pyrometer.
 Analog input mode: an external current (see under
 Analog input
- To set external the emissivity slope ε2/ε1 or the emissivity ε of each channel
- Reference: Here you select whether the emissivity ratio or the emissivity has
to be set externally.
- External setpoint setting (when equipped with a PID controller)
- External measuring distance adjustment (only M3 with motorized focus)
 Temperature unit:
The temperature can be displayed and entered in °C or °F. Changing
the mode will not change the entered values, no conversion will be done.
42
Here digital inputs and outputs can be checked for errors.
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Using the test function with connected systems activates the selected outputs and
enables:
METIS M311 / M322 / H311 / H322 (12-pin)
Input check
Output check
Click to activate
output
4.1.4
Output LEDs
Function
No function v
ε2/ε1 or Emissivity ε
External setpoint
Measuring distance
Reference
ε2/ε1 (emissivity slope)
ε of channel 1
ε of channel 2
ε of measured temperature