Delta-T HH2, User Manual

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Technical Reference
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93
Battery Low
Battery voltage is dangerously low - below 5.4 Volts.
Disconnect any sensor immediately and replace the battery. See Changing the
Battery on page 78
The battery voltage is too low to operate. The unit will attempt to go to sleep
immediately after being woken up, and cannot be operated until the battery has been
changed. This is to preserve any configurations and readings stored in memory, as
taking further readings or operating the units CPU may cause the unit to lose or
corrupt any stored readings.
The battery is only measured when the unit is woken so to properly check your
battery status allow the HH2 to sleep first, then press ESC to wake it.
Error code 7
See Error code 7 – on HH2Read on page 87.
Failed memory Full
Failed (to store readings) because memory is full.
Failed - Please erase data
Failed to store readings because an error that disables the storage of reading has
occurred.
Linearisation Table Corruption
A corrupt linearization table was detected. No subsequent readings can be stored.
Readings can still be taken using the default linearisation tables, but further readings
cannot be stored until all readings in memory have been erased.
See also: Readings can't be stored on page 89.
Live Sensor Connected
The HH2 cannot sleep. A sensor may be connected to one of the analogue inputs
which is feeding a live voltage to the HH2. The sensor should be disconnected from
the unit to allow it to go to sleep.
This error only appears where the unit wishes to enter sleep.
It can also be caused by keeping your finger on the ESC button