User's Manual for CM6G - Yokogawa

9-29.1.2 For Steel Mill UseSEE ALSORefer to Figure 6.2 and 6.3.a) Close V-4 and open V-5. The burner is extinguished. However, if the pump being attached, turnoff the power supply of it in advance.b) Set the secondary pressure of the pressure reducing valve for calibration gas cylinder to approx.200 kPa.c) Open V-9 or V-10 and introduce the calibration gas.d) Using the pressure reducing valve (4-1), adjust the indication of the flowmeter (4-2) to becomeabout 10 l/min. In case of only indication check, its adjustment of approximately 2 to 3 l/min ispermissible.e) Push the “START” switch of the calorie detector to ignite.f) Set the computing station to Input/Output status display (refer to Figure 6.15). The indication of“X3 (G-PRESS)” is adjusuted to ”500” with the pressure reducing valve (3-6).In the case of the density meter being attached, confirm and readjust the flow rate.g) Confirm “X2 (A-PRESS)” in Input/Output status display and adjust “X2” to “500” by using V-16.h) When completed the calibration, close V-9, V-10, V-5 and open V-4.In the case of the pump being attached, supply the power supply of the pump as the next step.i) Push the “START” switch of the calorie detector to ignite.j) Readjust both the gas differential pressure and the flow rate to the density meter.k) Do not forget to close the root valve of the calibration gas cylinder.9.2 Span Adjustment of the Calorie DetectorThis adjustment is not necessary for the usual calibration. This adjustment is held in the case such asthe replacement of the thermocouple of the burner unit. This adjustment is different depending uponif the preheating circuit exists or not. This adjustment is to be held after regulating each differentialpressure to “500”.9.2.1 When no Preheating Circuit Exista) Set the computing station to Input/Output status display with X1 (NON-CORR. WI%).b) Introduce the span gas and after ignition, wait until the indication “X1” becomes stable.c) Adjust the indication, using the “SPAN” potentiometer on the front side of the calorie detector, tobecome the specified value (x%). WI is used to find out the x value.Example:WI value of the span gas = 7960 WIWI value of the upper range = 8000 WIx =7960 100 = 99.5%8000IM 11R02A01-02E