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氢弧灯是751分光光度计的主要光源。由于氢弧灯灯丝在5 A 电流下加热时间过长,至使灯丝过早蒸发老化,甚至烧断。氢弧灯价格较高,每只约120元,且不易买到。为了不影响工作和减少经济开支,在原电路的基础上加装一个延时器,以缩短氢弧灯灯丝的加热时间,有效地延长了氢弧灯的工作寿命。氢弧灯电源是由一个单独的电子稳流器供
Hydrogen arc lamp is the main source of 751 spectrophotometer. As the hydrogen arc lamp filaments at 5 A current heating time is too long, so that the filament premature evaporation aging, or even blown off. Hydrogen arc lamps higher prices, each about 120 yuan, and not easy to buy. In order not to affect the work and reduce economic expenditure, based on the original circuit to install a delay to shorten the heating time of the hydrogen arc lamp filament, effectively extending the working life of hydrogen arc lamp. Hydrogen arc lamp power supply is provided by a separate electronic stabilizer