VAF instruments VISCOSENSE 2, Техническое руководство

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15.3 PI SETTING ERRORS (FOR ADDITIONAL VISCOSITY CONTROLLER) PI
参数设定误
差
The heaters in the booster system are controlled by a viscosity controller.
In order to get a good working viscosity system an optimum adaptation of the control parameters
(P,I) is necessary.
系统的加热装置由黏度控制器来进行。为了获得一个较好的黏度操作系统，控制参数
(P,I)
的最佳选用
是非常重要的。
P = Proportional band Pb (%)
比例范围 （
%
）
I = Integral action time Ti (min)
积分作用时间（分钟）
Problem
问题
Possible cause
可能的原因
Corrective action
纠正动作
Oscillating temperature with
distinct initial overshoot
振荡温度具有明显的初始过冲
Pb too low
Pb
太低
Increase Pb
增加
Pb
Set point is reached very slowly
after initial exceeding
在初始超出后缓慢达到设定值
Pb too high
Pb
太高
Decrease Pb
降低
Pb
The set value is reached very
slowly without overshooting
在没有过调时仍缓慢达到设定值
Ti too high
Ti
太长
Decrease Ti
降低
Ti
High initial overshoot followed
by fading oscillation
高初始过冲后振荡衰减
Ti too low
Ti
太短
Increase Ti
增加
Ti
15.4 HOW TO TAKE A HFO SAMPLE FOR ANALYSIS
如何扦取重油样品进行分析
The HFO sample must always be taken from the circulation system as close as possible to the
viscosity sensor. Never take a sample from the bunker, settle or day tank.
必须在靠近传感器仓室处取样。切忌从燃油柜，处理柜及日用柜中取样。
The HFO sample must be collected and stored in a clean bottle or sample container. The bottle or
sample container must be sealed in order to prevent contamination with other products. The sample
quantity must be at least 200ml.
重油样品必须收集并储存于干净的瓶或盛样器皿中，并加密封以防止污染。样量不低于
200
毫升。
Write down the actual viscosity and temperature reading when the sample is taken. Send the sealed
bottle or sample container with actual readings to a qualified laboratory or to VAF Instruments B.V.
for analysis.
记下取样时的实际黏度与温度。将附有实际读数并密封的样品寄往有资格的实验室或
VAF
进行分析。