Division 1 Rated operating conditions

The values of the rated operating conditions shall be specified by the manufacturer as follows:

1. 1.1.

   For the temperature of the liquid: θ_max, θ_min,

   • for the temperature differences: Δθ_max, Δθ_min,

   subject to the following restrictions: ${\mathrm{\Delta \theta }}_{\max }∕{\mathrm{\Delta \theta }}_{\min }\ge 10$ ; Δθ_min = 3 K or 5 K or 10 K.

2. 1.2.

   For the pressure of the liquid: The maximum positive internal pressure that the thermal energy meter can withstand permanently at the upper limit of the temperature.

3. 1.3.

   For the flow rates of the liquid: q_s, q_p, q_i, where the values of q_p and q_i are subject to the following restriction: $q_p∕q_i\ge 10$ .

4. 1.4.

   For the thermal power: P_s.