Custom Audio Electronics MT558, Руководство пользователя

Страница: 19 / 32

4.9 Thermistor
The thermistor is very important to adjust the strobe time (Tstrobe) ~ (SLT) in function of the head temperature and to
monitor the temperature to prevent the head damage if the temperature is over the limit described in the
Maximum conditions table.
Resistance R25: 30 K Ω ± 5% at 25°C •
B value: 3950 K ± 2% •
Operating temperature: –20 ~ + 80°C •
Time costant: Max. 30 sec.(in the air) •
Then the resistance value, R, versus temperature , T (in °C) is given by the formula:
R(T) = R25 × e { B × (1/TX – 1/T25) }
4.9.1 Thermistore Curves
0
180
140
TEMPERATURE : ( °C )
RESIST
ANCE
: (K
)
Ω
0 20 30 40 50 70 -20
100
20
80
40
60
120
160
-10 10 60
4. PRINT HEAD
User Manual
MT558 19