Delta-T HH2, User Manual

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Changing the Battery Moisture Meter User Manual 4.0
Changing the Battery
The HH2 unit works from a single 9 V PP3 type battery.
When the battery reaches 6.6V, (about 25% left) the HH2 displays:
*Please Change
Battery
On receiving the above warning, upload your data to your PC next, or replace the
battery. Observe the following warnings:
WARNING 1: Disconnect your device (sensor), particularly Profile Probes,
immediately on receiving this low battery warning. Failure to heed this warning
could result in loss of data.
WARNING 2: Ensure the HH2 is sleeping before changing the battery.
WARNING 3: Once the battery is disconnected you have 30 seconds to replace
it before all stored readings are lost.
If you do not like this prospect, be reassured that your readings are safe indefinitely,
(provided that you do disconnect your sensor and you do not disconnect your
battery).
If you continue to use the HH2 despite the low battery warning it will eventually stop
working in order to protect saved readings. At this point it will not upload data to the
PC. To recover the data now you must change the battery. Again, you must connect a
new battery within 30 seconds of disconnecting the old battery before data is lost.
The meter will, when starting up after a battery change always check the state of its
memory and will attempt to recover any readings held. So even if the meter has been
without power for more than 30 seconds, the meter may still be able to retain any
readings stored.
Readings recorded in memory and any new linearisation tables loaded by you will be
lost if the memory has no power for too long. If you did add new linearisation tables
(see page 66) then you will have to re-load them.