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Functions
7.9 Energy AnCal
FUE1010 IP65 NEMA 4X
122
Operating Instructions, 12/2014, A5E03086491-AC
EER
Energy Efficiency Ratio - EER is used to define the cooling efficiency of unitary air
conditioning and heat pump systems.
The efficiency is determined at a single rated condition specified by the appropriate
equipment standard and is defined as the ratio of net cooling capacity (or heat removed in
Btu/h) - to the total input rate of electric energy applied (in watt hours). The units of EER are
Btu/w.h.
EER = E
c
/ P
a
Where: EER = energy efficient ratio (Btu/w.h)
E
c
= net cooling capacity (Btu/h)
P
a
= applied energy (w.h)
7.9
Energy AnCal
The [Energy AnCal] menu cell allows you to enter an artificial energy rate in current rate
units that will drive the flow meter analog outputs, energy totalizer output and the display
screen shown below. You can use AnCal to check the analog outputs or as a reference
source for calibrating external devices such as remote display screens or chart recorders
and RTUs. To test the Totalizer function, leave Energy AnCal active long enough for an
accumulation to appear on the diagnostic data screen shown below. Moving the cursor from
the menu cell cancels the AnCal function.
①
The [Energy Rate] menu cell immediately reflects the Energy AnCal entry. Over time the Ener-
gy Total will also increase.
To activate Energy AnCal:
1.
Move the cursor to the [Energy AnCal] menu cell by pressing <Up/Down Arrow>.
2.
Press <Right Arrow> to enable numeric entry. Note that an equal sign (=) appears before
number.
3.
Type the desired flow rate using current rate units (e.g., 10.00 MBTU/H). Note that the
[Flow] menu cell now reflects the artificial rate.
4.
Move the cursor away from the menu cell by pressing <Up/Down Arrow> to turn Energy
AnCal off.
Содержание SITRANS 7ME3500
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