Emerson E2 Manuel D’Utilisation

overall system. The SHED OUT output remains ON until 
the KW usage falls below the demand setpoint.

In short, the purpose of Shed Mode is to get the total 

KW usage below the demand setpoint as soon as possible.

Power Monitoring applications are pre-programmed 

with extensive logging capabilities that record the hourly, 
daily, and monthly power usage statistics. 
Hourly

The hourly log contains a list of power usage summa-

ries of the previous 48 hours. An hourly log entry con-
tains:

• The time and date of the entry

• The KWh for that hour

• The maximum average KW that occurred within 

any demand window for that hour

• The highest instantaneous KW reading taken for 

that hour, and the time that reading was taken

The daily log contains a list of power usage summaries 

for the previous 48 days. A daily log entry contains:

• The date of the entry

• The KWh for that day

• The maximum average KW within any demand 

window for that day

• The highest instantaneous KW reading taken for 

that day, and the time that reading was taken

• The total number of minutes the Power Monitoring 

application was in Shed Mode

• The Heat Degree Days for that day

• The Cool Degree Days for that day

For monthly logging, the day of month can be user-

specified so the day of the month on which the utility bill-
ing period starts can be accurately compared to the utility 
bill. The monthly log contains a list of power usage sum-
maries for the previous 24 months. A monthly log entry 
contains:

• The month and year of the entry

• The KWh for that month

• The maximum average KW within any demand 

window for that month

• The highest instantaneous KW reading taken for 

that month, and the date and time the reading was 
taken

• The total number of minutes the Power Monitoring 

application was in Shed Mode

• The Heat Degree Days for that month

• The Cool Degree Days for that month

Heat degree-days and cool degree-days are standard 

industry measurements of the demand for heating and 
cooling. This measurement is based on the daily average 
outdoor air temperature. 

If the daily average temperature is below 65°F, then 

the number of heat degree-days for that day is equal to 65 
minus the day’s average temperature in degrees Fahren-
heit. Example: if the day’s average temperature is 54°F, 
the number of heat degree-days for that day is 65-54 = 9 
heat degree-days.

If the daily average temperature is above 65°F, then 

the number of cool degree-days for that day is equal to the 
day’s average temperature in degrees Fahrenheit minus 65. 
Example: if the day’s average temperature is 71°F, the 
number of cool degree-days for that day is 71-65= 6 cool 
degree-days.

Larger degree-day numbers indicate a larger demand 

for heating or cooling. Degree-day totals may be added 
together to indicate heating and cooling demand for 
weeks, months, or years. E2 does this to keep monthly 
logs of heat and cool degree-days.

The Input Type Selection parameter defines the way 

the Power Monitoring input (INPUT under the Inputs tab 
in application Setup) will be used. The parameter can be 
set to: KW Analog, Pulse KWH, Current (Amps), or 
Current 3-phase.
Settings

When KW Analog is selected, verify the input is con-

nected to a board and point that is set up with Engineering 
Units of KW. When Pulse KWH has been selected, verify 
the input is connected to a board and point that is set up 
with Engineering Units of KW. When Current (Amps) 
has been selected, verify the input is connected to a board 
and point that is set up with Engineering Units of Amps. 
When Current (3-phase) has been selected, verify the 
input is connected to a board and point that is set up with 
Engineering Units of Amps. Note that for 3-phase, three