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Fisher-DLC3000_Calibration

Fisher-DLC3000_Calibration
Fisher-DLC3000_Calibration

DLC3000 Setup/Calibration

DLC3000 设置/校验步骤

1. Connect ~24 VDC supply & 250 ohm min. series resistance, 375 handheld.

连接24V直流电源和最小250欧姆的电阻,以及375手操器。

2. Set LEVEL OFFSET [HOME, 3-3-3], to 0.0, then SEND [F2]

把LEVEL OFFSET(液位补偿) [从主菜单按3-3-3顺序键]设置为0.0,然后点击SEND(发送)[F2]。

3. Run SETUP WIZARD [HOME,3-1], and accept all defaults except for:

运行SETUP WIZARD(设置向导)[从主菜单按3-1顺序键],并且除了以下的参数外,全部接受默认值:

- Length units(use units in which displacer length is documented)

长度单位(按照存档文件中浮子长度的单位填写)

- Displacer Length(use actual value)

浮子长度(使用实际长度)

- Mounting sense(select ”Left ”or ”Right ” of displacer, as installed) 安装方式(按照表头在浮子的“左”或者“右”选择)

- Measurement mode (select LEVEL)

测量模式(选择LEVEL)

- PV units(use units desired for reporting PV on display)

PV单位(设置需要在屏幕上显示的PV的单位)

- SG(use the difference between SGs of the lower and upper calibration fluids) SG(对于界面应用场合,输入上下界面的校验液体的SG的差值)

4. Set up lowest process condition

设置最低工艺位置

- (OR hang weight=displacer weight – minimum buoyancy)

(或者使用砝码挂重,重量=浮子重量-最小浮力)

5.Mechanically couple transmitter to sensor and close access door(unlocks lever assembly)

把DLC与液位传感器(扭力管)耦和起来,并合上把手盖上接近口(放松杠杆组件)。

6.Run MARK COUPLING POINT menu item[HOME, 3-2-1](marks zero buoyancy) 运行MARK COUPLING POINT(标记耦合点)[从主菜单按3-2-1顺序键],设置零浮力点

- repeat if necessary until output is very close to 4 mA, 0%

如果此时输出不是4毫安与0%的话,重复上面步骤。

7.Set up highest process condition

设置最高工艺位置

- (OR hang weight=displacer weight – maximum buoyancy)

(或者使用砝码挂重,重量=浮子重量-最大浮力)

8.Run SINGLE POINT CAL menu item [HOME 3-2-4], enter actual or simulated process condition

运行SINGLE POINT CAL(单点校验法)[从主菜单按3-2-4顺序键],输入实际或者仿真的工艺值。

- repeat if necessary until output is very close to 20 mA, 100%

如果此时输出不是20毫安与100%的话,重复上面步骤。

9.If target process different SG is not the same as the value used for the calibration:

如果目标工艺中介质的SG与本次校验过程中介质的SG不同:

- Edit the SG value and enter the target process value.[HOME, 3-3-5] 编辑SG值,输入目标工艺中介质的SG值[从主菜单按3-3-5键]。

注:

This procedure assumes you are using the instrument in Level Measurement Mode, even if the process application is interface or density.

此步骤假设仪表使用液位测量模式,即使工艺应用是界面或者密度。

* The SG value used for a level application is the actual fluid SG.

在液位应用中SG值是实际流体的SG。

* The SG used for an interface application is the difference between the SGs of the lower and upper fluids.

在界面应用中,SG值是上下界面液体的SG的差值。

* The SG entered for a density application would be the difference between the minimum and maximum density range of the application.

在密度应用中,SG值是最大密度和最小密度的差值。

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