Transmitter Operating Temperature Configuration - Hitachi E-Compact Medium Power Series Operation Manual

5.4. Transmitter Operating Temperature Configuration

The transmitter's operating temperature is measured on the power modules' transistors, and
is configurable between 50°C e 60°C.
Configuration is done through the front panel Menu: Setup Menu "PA Temperature Control"
(Setup Menu [1M00]).
This configuration varies according to room temperature and the transmitter's efficiency, and
it is necessary to optimize operating temperature and equipment's lifespan.
This configuration shall be made when the equipment is activated following the procedure
below:
1. With the transmitter running at operational power for at least 30 minutes, access the web or the PA
USB interface to verify fan rotation.
2. Check fan rotation for all fans in the PAs.
3. Temperature adjustment must be done in order to obtain fan rotations between 5500 rpm and 6000
rpm.
4. If the highest rotation is below 5500 rpm, the temperature control has to be lowered. If it is above 6000
rpm, temperature control shall be raised.
5. Configure temperature at Setup Menu "PA Temperature Control". Lower or raise the temperature
according to description in step 4 above. It is recommended that the procedure starts in steps of 2 °C.
6. Once configured, wait 5 (five) minutes until transistor temperature stabilizes.
7. Repeat steps 3 through 6 until fan rotation is within range (5500 rpm to 6000 rpm).
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