Omega Engineering HH504 - Manual (Page 7)

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T1/ T2/T1-T2 Main display Input Selection
The input selection indicates which input is selected for main display; T1
probe, T2 probe or the difference between the two probes (T1-T2), when the
thermometer is turned on, it is set to T1.
When main display input selected T1, then T1 input can select alternate of
probe by pressing Pt385/Pt3926 key switch.
Pt385/Pt3926 T1 Input RTD Probe Select (Main display)
The Pt385/Pt3926 key switch the T1 input selects the Pt385 or Pt3926 RTD
probe as input, when main display input selected T1.
When the thermometer is turned on, it is set to the probe selected that was
in use when the thermometer was last turned off.
MIN MAX with Time record Mode (only Main display)
Press MIN MAX key to enter the MIN MAX Recording mode, (displays the
Maximum reading with time, Minimum reading with time and Average
reading stored in record mode). In the this mode the automatic power-off
feature is disabled and key, °C/°F key, REL key, SET key, Hi/Lo Limits
key and main display T1 T2 T1-T2 key, Pt385/Pt3926 key are disabled.
The beeper emits a tone when a new minimum or maximum value is
recorded.
Push MIN MAX key to cycle through the MAX, MIN and AVG readings.
If an overload is recorded, the averaging function is stopped and average
value display"----.-".