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Energy EnviroMonitor Overview
Page 6 Energy EnviroMonitor Manual
W
EATHER
C
ONDITIONS
M
EASURED
/C
ALCULATED
This section outlines each of the weather conditions measured/calculated by
the Energy EM. Each section includes a brief discussion of the weather condi-
tion and a listing of the various ways in which the unit displays or stores that
condition. Be aware that some of the weather conditions require an optional
sensor in order to measure/calculate a value (see “Optional Sensors” on
page 1). If you do not have the required sensor that reading will appear as a
series of dashes in the Energy EM display.
Values which are described as “Daily” readings will provide true daily read-
ings only if they are cleared each day. You may clear these values yourself or
use AutoClear (see “AutoClear” on page 12) to clear them for you. If you do
not clear the values every day, then you can use the “daily” readings to repre-
sent any interval you desire: two days, one week, one month, etc.
The notation “(AutoClear)” next to a weather condition indicates that the
Energy EM’s AutoClear function may clear the weather condition at a set time
every day. For information on AutoClear, see “AutoClear” on page 12.
The notation “(Alarm:)” next to a weather condition indicates that an alarm
exists for the weather condition. The type of alarms are noted after the colon.
For information on Alarms, see “Alarms” on page 14.
Cooling Degree-Days
Cooling degree-days provide a measure for calculating the effect of tempera-
ture on the use of energy to cool a location. Because temperature plays an
important part in the use of energy to cool a house or other structure, a mea-
surement which takes into account the accumulation of heat with passing time
is necessary to predict usage. One cooling degree-day accumulates when the
temperature remains one degree above the threshold for 24 hours. One cooling
degree day
also accumulates when the temperature remains 24˚ above the
threshold for 1 hour. The Energy EM calculates both normal cooling degree-
days and temperature-humidity index cooling degree-days. Temperature-
humidity index cooling degree-days uses apparent temperature (see “Temper-
ature and Apparent Temperature” on page 7) instead of outside temperature
when calculating cooling degree-days.
• “Daily” Cooling Degree-Days Sum (AutoClear)
• Cooling Degree-Days Total for the period (Alarm: High/Low)
• Average daily Cooling Degree-Days over the period
• “Daily” T/H Index Cooling Degree-Days Sum (AutoClear)
• Cooling T/H Index Degree-Days Total for the period (Alarm: High/Low)
• Average daily T/H Index Cooling Degree-Days over the period