When ALM2=ON (the alarm function of P2 probe is on),
the screen displays SET TEMP and the alarm value of P2
probe.
When ALM2=OFF (the alarm function of P2 probe is off),
the screen displays SET TEMP and “ ”.
When you plug both external probes simultaneously, both
external probes are current channels. The LCD screen
alternately displays data of both external probes at a
frequency of 0.5Hz.
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