Time Electronics 1090 Portable Process Calibrator - Manual (Page 13)

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1090 Technical Manual P a g e | 13
4.
Maintenance
4.1. Battery Life and Replacement
The 1090 is powered from an internal metal hydride battery pack with a capacity of 5AH.
This provides up to 60 hours of continuous operation. The mains recharger will recharge
the battery fully in about 11 hours.
During operation the battery voltage level is checked once per minute. If below 6.5V, a
‘Battery Low’ warning is displayed. If below 6.0V, a ‘Battery Dead’ warning appears and the
unit powers down.
4.2. Display
The LCD display should not be exposed to strong sunlight for prolonged periods.
4.3. Front Panel Keypad and Connections
Front panel is a sealed membrane keypad.
It should be cleaned by wiping with a damp cloth. Solvents must not be used to clean the
keypad as damage may result.
4.4. Fuse
A 0.5A slow blow battery supply fuse is located on the main board.
Size (20mm / 0.78in x 5mm / 0.20in dia)