Batteries; Technical Specification - Isotech TTI 7 PLUS User Maintenance Manual/Handbook

CAUTION: Disconnect the mains lead and all connecting leads, before removing the fuse holder. Replace only with
the correct fuse type, i.e. according to the following chart.
LINE Range
VOLTAGE Vac
Selection 47-63Hz
100V 90-110V}
120V 108-132V}
220V 198-244V}
240V 216-264V}
Maximum Input Power: 25VA

Batteries

The thermometers may be used either directly connected to the mains supply or, for portable applications, run from
the internal batteries. Approximately 8 hours continuous operation from a full charge is possible. The battery
charger is built into the instrument and charging commences immediately when the mains supply is connected,
illuminating the LINE LED on the front panel. The batteries used are of the sealed lead acid type; continuous trickle
charging causes no harm to the batteries and we always recommend running from the mains supply when possible,
thus ensuring the batteries are always fully charged and ready for portable applications.
automatically switch to trickle charge or fast charge mode depending upon the battery state.
LOW BATTERY indication is displayed when the batteries have approximately 10% charge left. When this indication
appears, the thermometers should be connected to a mains supply as soon as convenient, as approximately 50
minutes operating time remains. To extend the battery life, the backlight can be turned off via the OPT menu.
Operating time without backlight is approximately 14 hours.

Technical Specification

DISPLAY:
INPUTS:
Fuse (250V)
IEC 127
5 x 20 mm
630mA (T)
315mA (T)
LCD Graphics Panel, 240 x 64 dot, with LED backlight contrast control via front panel
keyboard.
2 channels for PRTs via 6 pin Lemo sockets. LEMO type number for input plug:
FGG1B.306.CLAD52
IMPUT IMPEDENCE > 10M
Max. input Voltage  40Vdc, 28Vrms
Common Mode Rejection 50Vrms
The inputs are linearised and user selectable to the following standards:-
EN6071=100 Ohm, Ra=3908
USER: Up to 20 probes may be configured to customer entered constant, A B, C, and R0
values. For Industrial PRT (CVD) and ITS 90 coefficients for SPRT
A standby current is always passed through the sensors.
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The charger will
TTI-7 Iss.02 – 06/11