9 Appendix
30
USB connecting cable Device-PC 0449 0047
Transport case for measuring instrument,
probes and hoses
0516 5505
Connecting cable 0554 5520
Testo 552 0560 5520
For a complete list of all accessories and spare parts, please refer
to the product catalogues and brochures or look up our website
www.testo.com
9 Appendix
9.1. Basis of calculation COP
Heat pump
The heating power and the efficiency calculation. COP heat pump
are calculated by the testo 570 as follows:
• Heating power = Volumetric flow rate x density of medium x
specific heat capacity x ∆T (K) / 3600
• COP = Heating power / power consumption
The following values can be entered via [Set] | [Efficiency calc.]:
Designation Unit Input range Factory
setting
Description
Power
consumption
kW 0,000–9,999 2,000 Electric power
consumption of system
(e.g. compressor)
Volume flow m
3
/h 00.0-99.9 20.0 Volumetric flow rate of
fluid in the secondary
circuit of the heat pump
(e.g. brine circuit)
Density of
medium
kg/m³ 0000.0-9999.9 1000.0 Density of medium in
secondary circuit (e.g.
water, brine, etc.)
Specific heat
capacity
kJ/(kg
x K)
0,000-9,999 4,182 Specific heat capacity
of medium in
secondary circuit (e.g.
water, brine, etc.)
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