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仪器仪表操作说明书翻译-中英对照
目 录
一. 仪器的主要技术性能
二. 仪器的外形结构
三. 仪器的使用方法
四. 仪器的维护
附录1. 缓冲溶液的配制
附录2. 缓冲溶液的pH值与温度的关系对照表
使用本仪器之前，请仔细阅读本使用说明书，以便使您能正确使用仪器，避免不必要的测量误差, 确保测量精度, 延长仪器的使用寿命。
pHS-25型pH计, 是一台由单片机控制，具有蓝色背光、双排数字显示LCD，同时显示pH(mV)值和温度值、缓冲溶液自动认知(pH4.00、pH6.86、pH9.18)功能，适用于工矿、研究院所的化验室取样测定水溶液的酸度(pH)值和测量电极电位(mV)值。
一、 仪器的主要技术性能
1. 仪器正常使用条件
(1) 环境温度(0~40)℃；
(2) 相对湿度不大于85%；
(3) 被测溶液温度：(5~60)℃；
(4) 供电电源：DC9V@ 300mA；
(5) 无显著的振动；
(6) 除地球磁场外无外磁场干扰。
2．仪器的主要技术参数
1. 仪器级别：0.1级
2．测量范围：
pH：0.00~14.00pH
mV：0~±1999mV(自动极性显示)
3. 最小显示单位：0.01 pH；1mV
4. 温度补偿范围：0~60℃
5. 电子单元基本误差： pH：±0.05 pH
mV：±1mV±1个字
6. 仪器的基本误差：±0.10pH±1个字
7. 电子单元输入电流：不大于1×10-11A
8. 电子单元输入阻抗：不小于3×1011Ω
9. 温度补偿器误差：±0.05 pH
11.电子单元重复性误差： pH：不大于0.05 pH
mV：不大于1mV
12.仪器重复性误差：不大于0.01pH
13.电子单元稳定性：0.05pH±1个字／3h
14.外形尺寸 1×b×h mm：150mm×195mm×85mm
15.重 量：0.4kg
3. 仪器成套性
(1) pHS-25型电子单元一台；
(2) pH复合电极一支；
(3) 电极梗一根；
(4) 电极夹一只；
(5) 直流稳压电源一只；
(6) pH4,7,9标准试剂各3包；
(7) 50mL塑料烧杯3只；
(8) 使用说明书一份；
(9) 合格证一份。
二、仪器的外形结构
仪器外型结构如图
1―测量电极插口；
2―参比电极插口；
3―mV输出插口；
4―外接电源插口；
5―LCD显示屏；
6―电源开关；
7―标定按键
8―mV/pH/ENTER按键；
9－置数下降按键；
10－置数上升按键；
11－电极梗安装装置。
三、仪器的使用方法
开机前准备
a． 电极梗旋入电极梗安装座，调节电极夹到适当位置；
b． 拉下复合电极前端的电极套，将复合电极夹在电极夹上；
c． 用蒸馏水清洗电极；
d． 将随机所配的直流稳压电源接到仪器上的电源插座中，另一端连接到220V交流电源插座上。
仪器的开机
按一下仪器的“电源”键，仪器即进入pH测量状态。
仪器的关机
仪器在任何工作状态下，按一下仪器的“电源”键，仪器进入关机状态。
仪器的温度设置
当仪器在pH测量状态下，按仪器的“▲”或“▼”键，仪器的“℃”符号会闪耀，当调整到所需的温度值时，按仪器的“mV/pH/ENTER”键，仪器的“℃”符号停止闪耀，把设置的温度值存入仪器内，仪器自动返回到pH测量状态。
仪器的标定
仪器在使用前，即测量溶液pH值前，先要进行标定。但并不是每次使用前都要进行标定，一般当测量间隔时间比较短的情况下，每天标定一次即可。
本仪器可以进行采用一点标定，也可以进行二点标定；仪器具有自动认知标定和手动标定功能，具体操作方法如下：
一点标定
注意：仪器使用一点标定时，其斜率值使用的是上一次的标定值
(1) 按一下“电源”键，接通电源，仪器进入“pH”测量状态；
(2) 按“▲”或“▼”键，调整仪器的温度显示值，使仪器温度显示值与使用的标准溶液的温度值相一致（在按“▲”或“▼”键，仪器的“℃”符号会闪耀），然后按仪器的“mV/pH/ENTER”键，把设置的温度值存入仪器内，仪器自动返回到pH测量状态；
(3) 按仪器的“CAL”键，使仪器“定位”符号闪耀，表明仪器进入第一点标定状态；
(4) 首先用蒸馏水清洗电极，然后在三种pH缓冲溶液中选择一种与被测溶液pH值比较接近pH缓冲溶液。把电极插入此标准溶液中，同时利用电极轻轻搅拌，然后停止搅拌，轻轻地把电极置于溶液中，等待仪器的读数稳定；
(5) 当使用仪器的自动认知标定功能进行标定时，按仪器的“mV/pH/ENTER”键，仪器显示该标准溶液在当前温度下的pH值，然后仪器“斜率”符号闪耀，按仪器的“CAL”键，仪器“斜率”符号消隐，仪器的一点标定完成，可以进行测量。
Made in Shanghai: 02220043rd
Produce and maintenance address: No. 311, Lanxi Road, Shanghai
Tel.: 021-62574582
Fax: 021-62574582
Postcode: 200333
Website: http: //www.sh-zhiguang.com
Instruction Manual
Made in Shanghai: 02220043rd
PHS-25
PH Meter for laboratory use
Shanghai Zhiguang Yiqi Yibiao Co., Ltd
2006-03 the third edition
Catalogue
I. Main technical feature of the instrument
II. Appearance structure of the instrument
III. Operating Methods of Instrument
IV. Maintenance of Instrument
Appendix 1: Preparation of Buffer Solution
Appendix 2. Contrast forms in relation between pH value and temperature of the buffer solution
Before operation this instrument, please read the operation manual carefully, in order to enable you to use the instrument correctly, and avoid the unnecessary measurement error, so as to guarantee the precision of measure, lengthen the service life of this instrument.
pHS-25 pH meter is a controlled by microprocessor, have blue back light and double digital display LCD; has the function of displaying pH (mV) value and temperature value in the same time, and buffering the automatic cognitive (pH4.00 , pH6.86 , pH9.18 ) solution. It is suitable for taking a sample and determining the value of acidity (pH ) of the aqueous solution and measuring the value of electric potential of electrodes (mV ) of the industrial mining and laboratory of the institute.
I. Main technical feature of this instrument
1. Normal service condition of the instrument
(1) Environment temperature (0~40)℃；
(2) Relative humidity is not greater than 85%;
(3)Examined solution temperature: (5~60)℃；
(4)Power supply: DC9V@ 300mA;
(5)Free of remarkable vibration;
(6)Free of magnetic interference except the geomagnetic field.
II. Main technical parameter of the instrument
1. The grade of the instrument: 0.1 grades
2. Measuring range:
PH: 0.00~14.00pH
mV: 0~±1999mVs (automatic polarity display)
3. Minimum displaying unit: 0.01 pH; 1mV
Compensation range of temperature: 0~60℃
5. Basic error of electronic unit: pH: ±0.05 pH
mV: ± 1mV± one scale
6. Basic error of the instrument: ± 0.10pH± a word
7. Inputs current of electronic unit: Not greater than 1× 10-11A
8. Input impedance of electronic unit: Not smaller than 3×1011Ω¸
9. Temperature compensator error: ±0.05 pH
11. Electronic repeated error of unit: pH: Not greater than 0.05 pH; mV: Not greater than 1mV
12. Repeated error of the instrument: Not greater than 0.01pH
13. Stability of electronic unit: 0.05pH±a word / 3h
14. External dimension 1× b× h mm: 150mm× 195mm× 85mm
15. Weight: 0.4kg
3. Configuration of instrument
(1) One PHS-25 electronic unit;
(2)One complex electrode of pH;
(3) One electrode stem;
(4) One electrode clamper;
(5) One dc regulated power supply;
(6) 3 packs of standard reagent of PH4, 7 and 9 respectively;
(7)3 50mL plastic beakers;
(8)One operation instructions;
(9)One quality certificate
II. Appearance structure of the instrument
The appearance structure of the instrument such as graph:
1- Measuring socket of electrodes;
2- Reference socket of the electrode;
3- MV exports the socket;
4- External power socket;
5- LCD display;
6- Switch;
7- Standard button
8- MV/pH/ENTER button;
9- Index distressing buttons;
10- Index increasing buttons;
11- Installation device of electrode stem.
III．Operating Methods of Instrument
Preparation before startup
a. Screw the electrode stalk into an installing seat and regulate the electrode clamper to an appropriate location;
b. Remove electrode casing at the front end of compound electrode and nip the compound electrode onto the electrode clamper;
c. Rinse the electrode with distilled water;
d. Connect randomly assigned regulated power supply to the power plug of instrument and connect the other end to 220V AC power plug.
Startup of instrument
Press key “Power supply” on instrument, which enters into pH measuring state.
Shutdown of instrument
Press key “Power supply” on instrument in any working state and the instrument enters into state of shutdown.
Temperature setting of instrument
When the instrument is in pH measuring state, press key“▲”or“▼”on instrument, the symbol “C” on instrument will be flashing; when it is adjusted to the required temperature value, press key “mV/pH/ENTER”on instrument, the symbol “C” will stop flashing and store the set temperature value into the instrument and it will return to pH measuring state automatically.
Calibration for instrument
Before starting up instrument, namely measuring pH value of solution, calibration should be carried out in advance but not every time before application. Generally, only one time of calibration per day is available when the measuring interval is relatively short.
This instrument adopts both one-point calibration and two-point calibration; the instrument has functions of automatically cognitive calibration and manual calibration, the specific operating methods are as follow:
One-point calibration
Notes: as for one-point calibration, the slope value applied is the calibration value last time.
(1) Press key “Power supply” and switch on, the instrument enters into “pH” measuring state;
(2) Press key“▲”or“▼”to regulate temperature value of instrument and keep temperature value of instrument consistent with temperature value of standard solution (the symbol “C” on instrument will flash on pressing key “▲”or“▼”), and then press key “mV/pH/ENTER”on instrument to store the set temperature value into instrument and the instrument will return to pH measuring state automatically.
(3) Press key “CAL”to make symbol “Calibration” on instrument flash, indicating the instrument has entered into calibration state for the first point;
(4) At first, rinse the electrode with distilled water, then select a sort of pH buffer solution among three pH buffer solutions with a pH value being close to the tested solution. Insert the electrode into this standard solution and mix it with the electrode at the same time, then stop mixing and put the electrode in the solution slightly, waiting for the reading of instrument becoming stabilized;
(5) When apply the function of automatically cognitive calibration for calibrating, press key “mV/pH/ENTER”on instrument and the instrument indicates pH value of the standard solution at current temperature, and then the symbol “Slope”on instrument flashes, which will disappear if key“CAL” is pressed. After one-point calibration has been completed, the measurement can be carried out.
When manual function of instrument is applied for calibrating, press key“▲”or“▼”to keep reading indicated by instrument consistent with pH value of buffer solution at current temperature (if mixed phosphate is applied for calibration at the temperature of 10℃, pH=6.92), press key“mV/pH/ENTER”on instrument and instrument indicates pH value of this standard solution at current temperature, and then the symbol “Slope”on instrument flashes, which will disappear if key“mV/pH/ENTER” is pressed. After one-point calibration has been completed, the measurement can be carried out.
Two-point calibration
(1) Carry out calibration for the first point as per method of one-point calibration, when the symbol “Slope”on instrument flashes, it indicates that the instrument enters into calibration state for the second point.
(2) After taking out the electrode form pH buffer solution, which should be rinsed with distilled water, insert the rinsed electrode into to another pH buffer solution and mix it with the electrode, then stop mixing and put the electrode in the solution slightly, waiting for the reading of instrument becoming stabilized;
(3) When apply the function of automatically cognitive calibration for calibrating, press key “mV/pH/ENTER”on instrument, which means the two-point calibration has been done and it enters into measuring state;
When manual function of instrument is applied, press key“▲”or“▼”to keep reading of indicated by instrument consistent with pH value of buffer solution at current temperature (if sodium tetraborate is applied for calibration at the temperature of 10℃, pH=9.33), press key
2013.3.9