Heat Meter (Hm Versions Only); Calibrate Temperature Sensors - GF PF220 V2 Betriebsanleitung

Operating Instructions
11

Heat meter (HM versions only)

NOTICE
This chapter only applies to GF PF330 V2 HM models. GF PF330 V2 and GF PF220 V2 models do not have heat metering capabili-
ties.
Rtd Board
PT100 Sensors
Hot 46 °C Energy
Cold 19 °C Power
- >Calibrate Temperature Sensors. .
Exit
11.1

Calibrate temperature sensors

Connect the temperature sensors and check that the displayed values are reasonable.
DD-MM-YY HH:MM:SS
5.2107e+01 KJ
2.1784e+01 KW
1. From the Main menu, use the Up and Down scroll keys to
select Setup Instrument. Press the ENTER Key. The Options
screen is displayed.
2. Use the Up and Down scroll keys to select Heat-Meter..
Press the ENTER Key.
The Rtd-Board screen is displayed.
If sensors are connected, Hot and Cold temperatures will be
displayed. A display of "***" indicates no connection or a broken
sensor. The screen also displays the current total Energy and the last
measured instantaneous Power level.
1. Clamp the sensors together and allow the
readings to stabilise.
2. The sensors should be reading approximately the same
temperature. However, because of small errors in the
system, the values from each probe may be fractionally
different. If this is the case, the sensors require calibration.
To calculate power, it is the difference in temperature that is
important, rather than the absolute temperature, although
small differences in relative density and specific heat
capacity, which are a function of absolute temperature are
accounted for in the calculations.
3. Select Calibrate Temperature Sensors...
4. Enter the user PIN code (71360). The Calibrate Sensors
screen is displayed.
5. For Use for Reference, select one of the
following:
• Hot
Difference in readings between the two sensors is applied as
an offset to the Cold sensor.
• Cold
Difference in readings between the two sensors is applied as
an offset to the Cold sensor.
• Set Value
If you have an existing temperature measurement system and
trust its temperature reading. In this case, the Hot and Cold
sensors not only have to be clamped together, but they have
to be clamped to the point at which the existing equipment is
measuring temperature. Ensure that the temperatures have
stabilised.
• None
Remove any offsets. If the temperature difference between the
two probes is more than 0.5 ⁰C, a power offset will be seen in
subsequent measurements.
6. Select Calibrate.. The RTD Board screen is displayed. Check
that the temperature values now read the same value. A
symbol is shown against the temperature reading that has
an offset associated with it and indicates that the probes
have already been calibrated.
Heat meter (HM versions only)
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