Isotech TTI-7-R, Operator'S Handbook Manual

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About the TTI-7-R
Battery charging operation is unaffected by the ON / OFF
key operation.
The TTI-7-R 0 may be operated from the AC electricity supply or the
internal battery. Fully charged batteries provide approximately 8 hours
continuous operation. The internal battery charger operates
whenever the electricity supply is connected. Front panel LEDs
indicate connection to the AC electricity supply and when the battery
is charging.
The batteries are a sealed lead acid type and require no routine
maintenance. Continuous charging causes no harm to the batteries.
Operate the TTI-7-R from the mains when possible to ensure the
batteries are always fully charged.
<LOW BATTERY> indication is displayed when the batteries have
approximately 10% charge or 50 minutes operating time remaining.
To extend the battery operation time, switch the display backlight off.
See Section 5.6.1.
If the batteries are left discharged for a long time, they become
difficult to charge on the first re-charging cycle. During this first re-
charge, it may not be possible to turn on the TTI-7-R . Leave the TTI-
7-R connected to the AC electricity supply for at least 12 hours to
allow the batteries to fully re-charge before using the TTI-7-R again.
3.3 The Function Keypad
All TTI-7-R measurement and programming facilities are accessed
through the function keypad. A brief description of key functions is
given in the table below. For a detailed description of how to use the
keys to configure and operate the TTI-7-R , refer to Section 5.
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