MULTICAL® 803 3.4.9 Leakage limits (V1, V2) >M< MULTICAL® 803 can be used for leakage monitoring when two flow sensors are connected to MULTICAL® 803 on inputs V1 and V2. The M code defines the leakage limit, i.e. the leakage monitoring sensibility. If a leakage is detected in the system, the info code for leakage or burst is activated, depending on the size of the leakage. The leakage search is based on a difference in mass (ΔMass) between the calculated mass for V1 and V2, respectively. The calculation of this difference in mass is carried out over 24 hours why the reaction time of the info code for leakage is 24 hours. The burst search is based on a difference in flow for V1 and V2, respectively. The burst search is performed over a period of 120 seconds. Read more about these info codes in the info code overview in paragraph 7.8. The sensibility of a leakage can be adjusted via the M code while the sensibility of a burst is fixed. This also appears from the table of the M code below. It is possible to detect leakages down to 15 kg/h with the connection of two flow sensors of qp 1,5 m³/h. Both the info code for leakage and for burst can be disabled via the M code (M = 0). Leakage limits (V1, V2) Leakage No active leak search ΔMass ≈ > 1 ,0 % of qp + 20 % q ΔMass ≈ > 1,0 % of qp + 10 % q ΔMass ≈ > 0 ,5 % of qp + 20 % q ΔMass ≈ > 0 ,5 % of qp + 10 % q Burst No active burst search Δflow > 20 % of qp Δflow > 20 % of qp Δflow > 20 % of qp Δflow > 20 % of qp M code 0 1 2 3 4 180 160 140 120 Sensibility 100 (∆flow ≈ ∆Mass) [l/h ≈ kg/h ] 80 60 40 20 0 0 Leakage limit for qp 1,5 m³/h M code = 2 (1,0 % of qp + 10 % q) 150 300 450 600 750 900 1050 1200 1350 1500 Average flow per day (q) [l/h] Permanent operational monitoring Leakage monitoring can with advantage be extended to include permanent performance monitoring as it just requires the installation of a set of three sensors instead of a sensor pair. In Denmark, for example, permanent performance monitoring reduces the number of random samples to three meters per random sampling lot, no matter the size of the measuring lot. Read more in the permanent performance monitoring guide (5512-1486_GB). The purpose of this guide is to provide caretakers, installers and consulting engineers with the information needed on Kamstrup's leak monitoring system and permanent performance monitoring. Kamstrup A/S · Technical description · FILE100000271_D_EN-55122360_G1_11.2023 51
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