题目

英语翻译
请翻译一下下面的说明书,这是一个比色仪的英文说明书.
1.fill the cuvet with 10ml of unreacted sample up to the mark and replace the cap .
2.place the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove .
3.Press ZERO and “sip” will appear on the display.
4.Wait for a few seconds and the display will show “-0.0-”.Now the meter is zeroed and ready for measurement.
5.remove the cuvet.
6.add the content of one packet of HL 93701 DPD reagent.Replace the cap and shake gently for 20 seconds(or 2 minutes in case of seawater analysis).
7.replace the cuvet into the holder and ensure that the notch on the cap is positioned securely into the groove.
8.wait for 1 minute and press READ DIRECT.The display will show “SIP” during measurements.
9.the instrument directly displays concentration in MG/L of free chlorine on the Liquid crystal Display.
10.to an empty cuvet add 3drops of HI 93701A-F DPDI indicator,3 drops of HI 93701B-F DPDI

提问时间：2020-12-01

答案

1.向比色皿中注入10ml未反应的样品至刻度,盖上比色皿的盖子.
2.将比色皿放入支架,注意盖子上的突起应准确置于凹槽中.
3.按ZERO键,屏幕上将显示“sip”.
4.等待几秒钟,屏幕上将显示“-0.0-”,表示仪器已经归零,可以进行测量了.
5.取下比色皿.
6.将一袋HL 93701 DPD试剂加入到比色皿中,盖上盖子,轻摇20秒钟（分析海水时应轻摇2分钟）.
7.将比色皿再次放入支架,注意盖子上的突起应准确置于凹槽中.
8.等待一分钟,按READ DIRECT键,在测量过程中,屏幕上会显示“sip”.
9.仪器液晶屏上将直接显示游离氯的浓度,单位为毫克/升.
10.向空比色皿中加入3滴HI 93701A-F DPDI指示剂,3滴HI 93701B-F DPDI缓冲液,轻摇混匀,立即加入10ml未反应的样品.
11.盖上比色皿的盖子,再次轻摇.
12.将比色皿重新放入仪器.
13.等待一分钟,按READ DIRECT键,在测量过程中,屏幕上会显示“sip”.
14.仪器液晶屏上将直接显示游离氯的浓度,单位为毫克/升.