E-mon Energy Software User Manual download pdf (Page 96)

Section 9

Meter

E-Mon Energy User Manual 9-1

E-MON

What is a Meter?

A meter is a device that measures the energy usage (i.e., electricity, gas, and water). Typically, there are 2 types of

electric meters. In a simple metering application, a kWh meter or kW Demand meter with or without display and

energy usage pulse output is sufficient. Sometimes, your existing “glass” type meters can provide energy pulse

output – KYZ. Utilizing the KYZ pulse output, we can connect to a data recorder for capturing and storing the pulse.

For more complex metering, a meter will also capable of providing information on voltage, amperage, power factor,

phase angle, etc; meters such as the Class 3000. These high-end meters have a high performance microcontroller

capable of calculating various elements of energy. E-Mon offers several meter types:

• KWh Meter with pulse output capable of connecting to a data recorder

• KWh/KW Demand Meter with pulse output capable of connecting to a data recorder

• Class 3000 with built-in data recorder and communication

What is a Submeter?

A submeter is a meter that’s installed after the master meter (a master meter is usually a utility meter) for the purpose

of defining the energy use a specific location. As an example, a shopping mall owner could have a master meter that

measures the electric use for the entire shopping mall. Thus, the mall owner would receive a single bill. An issue

that frequently arises from the single meter is how to recover the usage charge from each store. To make matters

worse, each store can have different types, (e.g., clothing, pizza, computer, ice cream, etc.). Therefore, the actual

usage each store contributes to the total bill is unknown. To resolve this obstacle, submetering can be installed to

monitor the actual usage for each individual store. The shopping mall owner will then be able to read the meters and

generate a bill for each store in order to recover the cost of the master meter bill.

How does E-Mon Energy™ Recognize the Meters?

E-Mon Energy recognizes the meters through an address assigned and associated with the recorder at each group and

location. Each meter gets an assigned address that determines one of the eight positions associated with the recorder

(IDR) in the site location. If the recorder (IDR) has an address of 1A, then the meter address would be 1A1, 1A2, and

continue up to eight meters. When E-Mon Energy scans for recorders, the recorder will report back the number and

position of the input jacks that are being connected to the meters. If the recorder or meters are new to E-Mon Energy,

it will also query the recorder and meter information in preparation for adding to the database.

What is the Meter Information?

The meter information consists of voltage, amperage, sets of sensors in parallel, and pulse factor. This information is

normally taken from the Meter Information Form, and entered into E-Mon Energy (see Appendix section for the

Meter Information Form). The meter information is normally entered into E-Mon Energy during a first-time

configuration setup. This information is then uploaded to the IDR (recorder) for each meter. The meter information,

such as units of measure, can be different, depending on the energy resource you are using. If your system involves

connecting other pulse output meters into the recorder (IDR), you will need to get the pulse value for these meters.

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E-mon Energy Software User Manual Page 96