righted material TR62750@IEC:2012(E) - 15 licensed to BR Demo by Thomson Reuters ( Calculation of lamp and ECG systems - SoSmin 4.2 The auxiliary heat delivered to the cathode substitution resistor, Rtest1, under conditions at l = lD30 is Heat aux3o = /2 (0,282) (7,5)= /4 (0,144)2 (7,5) = 1,019 W The voltage that delivers the same auxiliary heat to a 54W T5 HO cathode is CVmin30 = (2,475 9) [1,019] 0.695 4 = 2,508 V (Scientific), Inc.. The currentthat delivers thesame auxiliaryheat toa54WT5HOcathode is Imin30 = (0,271 6)[2,508) 0,437 8 = 0,406 A The minimum sum-of-squared lead currents, SoS'so, at lD3o for the lamp-ECG system is then calculated as follows: SoS'30 = ('min30 + /z lD30)2 + (lmin30 = V2 lD30)2 = 2 Imin302 + V/2 /D302 = 2 (0,406)2 + /2 (0,144)2 = 0,340 A2 t.com The coefficients of the informative SoS'min limit line are then calculated: downloaded Y1 = [SoS'30 - /2 IDtrans 21//Dtrans -'030] = [0,340-/2 (0,380)2]/[0,380-0,144] = 1,136 A X1 onNov-28-2014byJamesMadison. = /2 (0,380)2 + 1,136 (0,380) = 0,504 A2 And the informative SoS'min limit line (see 3.2.1) is SoS'min ["LH?+ ILL3] = X1 - Y, × lD for /D30≤/p</Dtrans SoSmin = 0,504=1,136 × l Calculation of lamp and ECG systems - CV'min 4.3 The informative minimum cathode voltage line is calculated starting from the voltage that .No further heatsthecathodetoR/R.~4,3 CVmin10 = [(Rn/Rc)/a3) (1/b3) reproduction = [4,30 /2,288 3] (1/0,560 8) = 3,083 V The coefficients of the informative minimum cathode voltage limit line are then calculated: I or distribution is permitted. Y3 = [Cmin10.--CVmin30l/|'D30 --'min] = [3,083 2,508]/[0,144 0,050] = 6,12 2 X3 = CVmin30 + Y3 ×'30 = 2,508+6,12×0,144=3,39 V And the informative minimum cathode voltage limit line (see 3.3.1) is Uncontrolled when CVmin =X3-Y3×lD for IDmin ≤ lb< lD30 print yrighted material l - 16 - TR62750@IEC:2012(E) I licensed to BR Demo by Thomson Reuters Calculation of ECG qualification limits - CVmin 4.4 Steps in the calculation of the normative minimum cathode voltage for ECG qualification (see 3.3.2) are as follows. The minimum cathode power with no lamp current (lp = 0) is P'mino = [X3 / a2] (1/b2) This heating power is then applied to the specified substitution resistor Rtest3 and the resulting resistorvoltage is calculated: Vmino = [7,0 × 1,57] (1/2) = 3,316 V (Scientific), Inc.. The invariant delivered auxiliary cathode heat at lp = lp3o is then used to calculate a voltage for the substitution resistor Rtest3 at /p30: Vmin30 = [Rtest3 × Heat auX3o] (1/2) = [7,0 ×1,019] (1/2) = 2,670 V Thetransformedvoltage limit equation is nowdetermined: CVmin = X3 - Y3 × ID .com With the coefficients given by downloaded X3 = Vmino = 3,316 V Y3 1 on Nov-28-2014 by James Madison. No further i = [3,316 2,670]/(0,144) = 4,48 The minimum cathode voltage for the substitution resistor at the minimum dimming discharge current is given by CVmin = X3- Y3 × IDmin* =3,316-4,48x0,050=3,09V 4.5 The maximum cathode heating limit for the informative lamp-ECG system is determined by calculating the cathode voltage required for Rn/R。= 5,2 (see 3.4.1) CVmax = [(Rn/Rc)/a3] (1/b3) reproduction =[5,2/ 2,288 3] (1/0,5608) = 4,321 V 4.6 Steps in the calculation of the normative maximum cathode voltage for ECG qualification (see 3.4.2) are as follows. The cathode heating characteristics (see 3.2.1) are used to determine the maximum cathode power with no lamp current (lb = O), Pmaxo = [CVmax / a2] (1/b2) = [4,32a 2,475 9] (1/0,6954) = 2,23 W . Uncontrolled when prin Copyrighted material licensed to BR Demo by Thomson Reuters (Scientific), Inc., subscriptions.techstreet.com, downloaded on Nov-28-2014 by James Madison. No further reproduction or distribution is permited. Uncontrolled when print TR62750@IEC:2012(E) - 17 - This sheating g power is then applied to the specified substitution resistor Rtest2 and the resulting maximum cathode voltage for the substitution resistor is calculated: CVmax = [Rtest2 × P'max9] (1/2) = [8,5 × 2,23] (172) = 4,