United Process Controls PROTHERM 50, Руководство по эксплуатации

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UNITED PROCESS CONTROLS GMBH Page 7 Protherm 50 P68.230
Sub menus
Overview
Display of the actual values of atmosphere- and temperature controller. Which values are shown, de-
pends on the selection of the control variable.
Atm-Overview
Display and respectively setting of the atmosphere-controller. The displayed setpoint depends on the
operating mode (Local/Remote). In “Local” mode the local setpoint is shown and may be changed. In
“Remote” mode the remote setpoint is display and cannot be changed locally.
To alter the setpoint the PT50 must be in the setpoint- or configuration-level.
Tmp-Overview
Display and respectively setting of the temperature-controller. The displayed setpoint depends on the
operating mode (Local/Remote). In “Local” mode the local setpoint is shown and may be changed. In
“Remote” mode the remote setpoint is display and cannot be changed locally.
To alter the setpoint the PT50 must be in the setpoint- or configuration-level.
Sensor-Values
Display of the e.m.f. (electromotive force) and temperature of the O2-probe.
Probe-Purging
The function probe purging provides a cyclic purging or a purging which is started by a process leading
system. Purging the probe makes only sense with carburizing processes.
During a probe purging, the calculation of the actual value as well as the setpoint of the atmosphere-
controller are frozen in order to minimize the influence of the process through the purging. The values
still remain frozen after completion of the purging for a refresh time, during which the probe can come
back to the correct measurement value again.
Also the measurement of probe voltage and probe-temperature can be frozen additionally.
The values for purging time, refresh time and in the case of the cyclic purging the interval time can be
configured.
Interval
The interval time between two cyclically purging actions in minutes. A “0” means that no cyclic purging
is caused. But a purging can be started from a process leading system or with the service-program.
Delay
With the use of several PT50 at a furnace it may happen that all PT 50 start the purging simultaneously,
because with same interval all devices behave equal after power up. In order to avoid this, a different
value can be set in each PT50 for the delay. Delay [min] is the time, that passes after switching on the
PT50 up to the first cyclic probe-purging. The delay shall 0 or bigger than the sum of purging- and re-
fresh time.
Duration