(1) Kev xaiv raws li daim ntawv thov ib puag ncig thiab lub hom phiaj tshwj xeeb: Xaiv hom khawm- xws li qhib, tiv thaiv, tsis muaj dej, lossis corrosion- tiv taus-raws li qhov chaw ua haujlwm; xaiv qhov kev teeb tsa tsim nyog-xws li lub rooj kov, qhov tseem ceeb- ua haujlwm, nres thaum muaj xwm ceev, lossis teeb pom kev zoo- raws li qhov xav tau ua haujlwm. Piv txwv li, cov nyees khawm txheem ntawm lub console tswj vaj huam sib luag tuaj yeem yog hom qhib; illuminated nyees khawm yuav tsum tau siv yog hais tias qhov kev khiav hauj lwm raws li txoj cai yuav tsum tau muab tso tawm; key- cov nyees khawm ua haujlwm tau pom zoo rau cov ntawv thov tseem ceeb los tiv thaiv kev ua haujlwm tsis raug cai; thiab corrosion- hom resistant yuav tsum tau siv nyob rau hauv ib puag ncig nrog corrosive gases.
(2) Kev xaiv khawm thiab qhov taw qhia lub teeb xim raws li kev ua haujlwm, kev qhia txog kev xav tau, thiab kev ua haujlwm: Ntsuab yog siv los qhia "pib" lossis "power on," thaum liab qhia tias "stop." Tsis tas li ntawd, qhov taw qhia teeb (qhov muag teev) muaj nyob rau hauv ntau qhov kev ntsuas hluav taws xob, xws li 6.3V, 12V, thiab 24V.
(3) Kev txiav txim siab ntawm tus lej ntawm cov nyees khawm raws li kev tswj xyuas Circuit Court: Cov kev xaiv muaj xws li ib leeg, dual, triple, lossis ntau- khawm teeb tsa. Piv txwv li, peb lub nyees khawm nyob rau hauv ib lub thawv tuaj yeem siv rau "rau pem hauv ntej," "rov qab," thiab "stop" tswj, whereas ob lub - khawm sib dhos hauv ib lub kaw lus txaus rau "pib" thiab "stop" ua haujlwm.
