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Digi-Watt Watt hour Meter Product Description
Safety Certifications
UL Listed  for Single phase 3 wire devices is Pending. CSA archived
The Digi-Watt Meter watt hour counters was designed to measure accumulated kilowatt hours on
any electrical system that has one, two or three phases, each one approximately 120 volts to neutral.
The 1000 and 2000 series, measure power on electrical systems with 220 volts AC to neutral
(most of the rest of the world, including industrial use in North America). Rather than mount in a
standard meter socket, the meters were designed to be installed in any NEMA approved electrical
enclosure.  An optional mounting plate is available for easy installation of the counter.
Each meter consists of several components
         An electronics module
         One, two or three current transformers (CTs)
         An electro-mechanical counter to display the accumulated kilowatt hours
         Meters are available in several configurations for different types of service
         Single 120 volt service
         Single 240 volt service
         Single three-phase, 208 volt service in delta, wye and wild leg (stinger) configurations
         Single three phase, 277/480 volt service
Installation Overview  Caution
Serious injury can result from electrical shock.  Be sure to turn off the electrical power
before installing any meter. Fire can result from loose electrical connections. 
Ensure that all electrical connections are secure.  If you do not understand theses instructions
hire an experienced electrician to install the meter for you.  Help is also available from the factory
buy phone or email.  In most localities a permit and  inspection is required to install the meters.

Digi-Watt watthour counters are designed to be mounted in any type of standard electrical

enclosure, a meter socket is not used.  The meter is connected to the neutral line and to each

of the power lines to provide the voltage reference for the power measurement and to provide power

to run the meter.  The power line carrying the current to be measured is passed through a current

 transformer (CT) and the CT is connected to the meter.  A 120 volt service requires one CT,

a 240 volt service with neutral requires two CTs and three-phase, 208 volt service, needs three CTs. 

A 240 volt service without neutral requires one CT and a three phase delta service (no neutral)

requires two CTs. Connecting two wires from an electromechanical display counter completes the

installation.  

Warranty The manufacture warrants its products, if used in accordance with all applicable

instructions, to be free from original defects in material and workmanship for a period of five years

from the date of manufacture. If the product should prove defective in material or workmanship

within that period, Davidge Controls will repair or replace the product, in its sole discretion.

 Service under this Warranty can only be obtained by your delivering or shipping the product

(with all shipping or delivery charges prepaid) to: Davidge Controls. Call MetersUSA 1(847) 302 7691

for a Return Material Authorization (RMA) before sending any equipment back for repair.

THIS WARRANTY DOES NOT APPLY TO NORMAL WEAR OR DAMAGE RESULTING FROM

ACT OF GOD, ACCIDENT, MISUSE, ABUSE, OR NEGLECT.  SELLER MAKES NO EXPRESS

WARRANTIES OTHER THAN THE WARRANTY EXPRESSLY SET FORTH HEREIN, EXCEPT

TO THE EXTENT PROHIBITED BY APPLICABLE LAW. ALL IMPLIED WARRANTIES INCLUDING

ALL WARRANTIES OF MERCHANTABILITY OR FITNESS ARE LIMITED IN DURATION TO THE

WARRANTY PERIOD SET FORTH ABOVE AND THIS WARRANTY EXPRESSLY EXCLUDES ALL

 INCIDENTAL AND CONSEQUENTIAL DAMAGES. (Some states do not allow limitation on how

long an implied warranty lasts, and some states do not allow the exclusion or limitation of incidental

or consequential damages so the above limitations or exclusions may not apply to you. This Warranty

 gives you specific legal rights, and you may have other rights which vary from jurisdiction to jurisdiction).

Damage from lightning strikes, power surges, and improperly connecting the meter to the power source
are not covered by the warranty.
Our limited warranty includes replacement or repair of meters that fail for manufacturing problems,
but it does not cover lightning strikes, physical abuse, or problems caused by miswiring.  It also
does not include consequential damages such as the cost of labor to replace a defective meter or
loss of income from a meter not registering the power used by a tenant.
Technical Specifications
All Digi-Watt models share these common specs.

Voltage Requirements:

90-140 VAC to Neutral for each element

Frequency:

50-60 Hz

Power Consumption:

2 watts

Phase:

Single phase, 2 phase, or 3 phase

Rated Load:

200 amps each element

Relay Output:

5 VDC @ 300 mA maximum

Counter Pulse

10 VDC for 40 msec, 70 msec delay between pulses

Physical size:

5" x 2.78" x 0.91"

Weight: 

4.0 oz

Temperature range:

Operating

-20 F - 160 F (-28.8 C to 71.1 C)

Storage

-40 F - 160 F (-40 C to 71.1 C)

Start up

-20 F - 160 F (-28.8 C to 71.1 C)

Humidity:

Non-condensing

Restrictions:

Must be mounted in NEMA enclosure appropriate for the location. Must be mounted in dry location. Must use current transformers provided by MetersUSA
Current Transformers are dedicated to the instrument.  Non-standard CTís
are available and must be calibrated with the unit at time of final assembly.
Specifications for Standard Model 4720/1 Current Transformers

Physical Size:

1.25" outside diameter

0.55" inside diameter

Weight:

1.25 oz

Leads:
24" long, 300 VAC insulation
Specifications for the Mechanical Display
Physical Size:
1.19" x 0.78" x 1.55" largest dimensions
1.06" x 0.56" size for mounting hole
Weight:.
3.75 oz
Mounting Plate:
0.156" max thickness for mounting plate
0.062" min thickness for mounting plate
Activation pulse
5-12VDC 40msec duration