SensorTherm METIS M322 User Manual

METIS M311 / M322 / H311 / H322 (17-pin)
SensorTools Software
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 Click the extension icon to open the grouped control parameters.
 PID parameters:
- Proportional band Xp: The proportional band represents the reciprocal of the gain of the control-
ler (Entering 0.1-1000%, 0.1 = highest gain, 1000 = lowest gain).
- Integral time Ti: The integral time constant represents a kind of smoothing or delay
(Note: Ti is a multiple of the sampling time. Therefore, changes in the sampling time have an im-
pact on this value).
- Derivative time Td: The derivative time constant slowdowns the rapid rise to prevent overshooting
(if, for example, the actual value has almost reached the target value but still strong increases, Td
slows a further increasing to prevent an overshoot).
(Note: Td is a multiple of the sampling time. Therefore, changes in the sampling time have an im-
pact on this value).
- Sampling time: Select how quick temperature values will be read out of the sensor. Select the pa-
rameter depending on the inertia of the heating process (Note: Ti and Td are a multiple of the
sampling time. Therefore, changes in the sampling time effect changes in Ti and Td).
 Power adaptation
- P-min: The minimum control output power defines the power set to the control output at least.
- P-max: The maximum control output limits the power to the entered value.
- P-zsc: Limits the control output power as long as the beginning of the sensor’s or pyrometer’s
temperature range is reached. This is useful to avoid a too fast start of a heating process because
the object temperature is out of the pyrometer’s temperature range.
- P-dynamic: Limits the power which the control output can control suddenly (standard 100%).
 Other functions:
- Setpoint limit 1 and 2: Activates every selected “setpoint limit” output (see 4.1.3 Digital Inputs /
Outputs and under 7.2.3  Digital Input / Output) if set temperature is exceeded or falls below.
The required temperature has to be set relative to the setpoint temperature (in the control parame-
ter field), not as absolute value.
- Setpoint deviation: defines the maximum permissible deviation between setpoint and actual val-
ue. Used to detect if a ramp is within tolerance and then initiate the subsequent hold time.
 AutoTune settings: The AutoTune function enables to detect automatically useful values
for the proportional Xp and integral time constant Ti. The function tries to find the values Xp and Ti
without overshooting the setpoint temperature.
- The AutoTune target temperature defines the temperature that is used for Xp and Ti determina-
tion. The entry occurs in % and defines the difference between setpoint and actual value (example:
setpoint is 1000°C, the measurement object is cold which means the actual value is the pyrome-
ter’s beginning of temperature range and thus, for example, 500°C, then the target temperature is
750°C at 50% factory setting). Only a value below 100% prevents a temperature exceeding during
P-I-determination and thus a possibly material destruction due to overheating.
- Next start with AutoTune: Check this box to activate the AutoTune function with the next control-
ler start. Starting the controller with “Start” will start first the AutoTune process followed by the pro-
grammed control process. This also works fort an external control start. The function is only active
for one controller start and will be unchecked with the next start.
- Controller start always with AutoTune: Starts every time the AutoTune function when the con-
troller is started.
INFO:
The AutoTune process always starts from the current actual value (measured value).
At a restart any residual heat of the object can thus potentially lead to unusable values.

SensorTherm METIS M322 Specifications

General

Brand	SensorTherm
Model	METIS M322
Category	Measuring Instruments
Language	English