eKM Metering Inc.
EKM Metering Inc. – www.ekmmetering.com – [email protected] – (831)425-7371
• Nominal Voltage Ranges:
120V to 480V, 2-wire, Single-phase, One Line & Neutral
120V to 480V, 3-wire, Single-phase, 2 Lines & Neutral
120V to 415V, 3-wire, 3-phase, 3 Lines, No Neutral
120V to 480V, 4-wire, 3-phase, 3 Lines and Neutral
• Range of allowable environmental conditions: Pollution Degree 2,
Measurement Category III, Altitude rating 2000 meters max. Maximum
Temperature Range: -30 Deg. C to 70 Deg. C. Tamper Detection Class 1.
• The equipment is protected throughout by
double insulation as indicated by this symbol:
• Accuracy Class 0.5
• Rated Frequency: 50Hz/60Hz
• Red LED on the meter face flashes 800 times/kWh. 1 flash = 1.25Wh.
• Received California Type Approval for revenue grade metering
Safety Precautions:
• Meter should be installed by a qualified electrician.
• Turn off all power supplying the equipment before preforming any
wiring. Use a properly rated volt meter to confirm power is off.
• Use of this device inconsistent with this manual can cause permanent
damage to the unit and/or serious harm to the operator.
Tools/Materials List:
• Volt meter
• Small standard screwdriver
• Wire stripper
• DIN-Rail
•16-22 AWG stranded copper wire
• Inline fuse holder with maximum 1Amp fuse
• Use a Type 4 Enclosure (with appropriate conduit and fittings) if meter
will be installed outdoors
Installation Instructions
For All Systems:
1. Disconnect or switch power off before attempting to install, connect,
disconnect or service the meter or the external current transformers
(CTs). ALL POWER MUST BE DISCONNECTED!
2. Mount the meter using 35mm DIN Rail in a protected indoor location.
If installing outdoors, a UL Listed Type 4 Enclosure is required.
3. IMPORTANT: Distinguish and then identify the Neutral and the Line(s)
(‘hot’ wire(s), usually black or red). Label the Neutral and then,
depending on your electrical system, assign labels as described below.
4. Tightening torque of terminals:
All terminals: 4.4 in-lb. (0.5 Nm)
120V, 2-Wire, Single Phase:
1. Label Line 1 as L1.
2. Fit CT1 around L1. Make sure the arrow is facing towards the load (in
the direction of flow).
(Fig 2)
3. Black CT wire connects to Port 1 on the Omnimeter. White CT wire
connects to Port 2.
(Fig 2)
4. With split core CTs, close the CT around the wire to be measured and
press firmly until you feel and hear it click to indicate full closure. The
buttons should be fully out. Use a zip tieto ensure the CTs remain
securely closed.
5. To power the meter and get a voltage reference: Use a maximum 1.0
Amp inline fuse on L1. Connect one fuse holder pigtail to the breaker,
lug or an appropriate line-tap device, and connect the other pigtail to
16-22 AWG UL rated stranded copper wire for connection to the meter.
6. L1 connects to Port 7 on the Omnimeter, Neutral to Port 10.
(Fig 2)
7. Once the meter is properly mounted to the DIN Rail or enclosure and
all wiring is completed, with terminal block covers installed, power can
be turned back on.
8. Meter will then begin cycling through meter values. For details go to:
http://documents.ekmmetering.com/EKM_Metering_LCD_Display_Value_Reading.pdf
9. A video of proper install of a 120V system can be found here:
http://www.youtube.com/watch?v=ky9sgr1LTMk
120/240V, 120/208V, Single Phase, 3-Wire:
1. Label L1 and L2. (Arbitrarily assign labels.)
2. You will be using 2 CTs for this install. Label them CT1 and CT2.
3. Fit CT1 around L1. Make sure the arrow is facing towards the load (in
the direction of flow).
4. Fit CT2 around L2.
(Fig 1)
(Fig 2)
EKM-Omnimeter I v.3
Spec Sheet
1 2 3 4 5 6 7 8 9 10
L1
L2/N
CT1
1
1
1
78
100
.
66.5
Load
current
Basic error %
Class 0.5 Class 1
0.05
I
b
1.0
1.0
1.0
+–
0.5
+–
1.0
+–
1.0
+–
0.5
+–
0.5
+–
1.5
+–
1.0
+–
1.5
+–
1.5
+–
1.0
+–
1.0
+–
0.5(L)
0.8(C)
0.5(L)
0.8(C)
0.1
I
b~
I
max
0.1
I
b
0.2
I
b~
I
max
Power
factor
COSθ
120V, 240V
Single-Phase
2-Wire
Load
Blk Wht
Fuse
