Leviton MMSMT-D02, 6PSMT-C02, MMSMT-E02, MMSMT-C02 User manual

DI-000-MMSMT-00A
February 21st, 2014

Models 6PSMT-C02, MMSMT-C02, MMSMT-D02, MMSMT-E02

0.5% Mini Meter in Surface Mount Enclosure with Wireless AMR Option

Product Description

Technical Specifications

Installation Instructions

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MINI METER SURFACE MOUNT INSTALLATION GUIDE

List of Figures ............................................................................................................................... 2

List of Tables ................................................................................................................................. 2

1. Product Description ................................................................................................................ 3

1.1General Description............................................................................................................ 3

1.2 Meter Features ................................................................................................................... 3

1.3 Meter Certifications ........................................................................................................... 3

1.4 Model Numbers.................................................................................................................. 3

1.4 Physical Description .......................................................................................................... 4

1.4.1 Mini Meter in Surface Mount Enclosure .................................................................. 4

1.4.2 Tamper Protection ...................................................................................................... 5

1.5 Functional Description ...................................................................................................... 5

2. Technical Specifications ......................................................................................................... 6

2.1 Electrical Specifications .................................................................................................... 6

2.2 Input/Output Connections and User Display ................................................................. 7

Table 3: I/O connections ..................................................................................................... 8

Table 4: Display indicators .................................................................................................. 8

3. Installation Instructions ........................................................................................................... 9

3.1. Explanation of Warning Symbols ................................................................................... 8

3.2 Safety Precautions ............................................................................................................ 9

3.3 Preparation ......................................................................................................................... 9

3.4 List of Materials ................................................................................................................ 10

3.5 Setting up the Enclosure ................................................................................................ 10

3.5.1 Selecting a Mounting Location ............................................................................... 10

3.5.2 Making Conduit Openings ....................................................................................... 11

3.6 Installation of Voltage Lines ........................................................................................... 10

3.7 Installation of Current Transformers ............................................................................. 11

3.8 Surface Mount Enclosure Installation ....................................................................... 13

3.9 Testing the Installation .................................................................................................... 15

4. Wireless Automatic Meter Reading .................................................................................... 15

5.1 Network Activation ........................................................................................................... 16

5. Maintenance ........................................................................................................................... 19

6. Troubleshooting/FAQ ........................................................................................................... 19

7. Returned Policy/Warranty Information .............................................................................. 21

Leviton Manufacturing Co., Inc. 1 Contents

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List of Figures

Figure 1: Mini Meter Surface Mount enclosure dimensions .................................................. 4

Figure 2: Mini Meter connections and display ......................................................................... 6

Figure 3: Leviton solid core CTs .............................................................................................. 12

Figure 4: Enclosure installation ................................................. Error! Bookmark not defined.

Figure 5: Mini Meter hookup diagram ..................................................................................... 14

Figure 6: Wireless Network consisting of MDTs, Repeater, DCAP ................................... 16

Figure 7: Tehama Wireless MDT ............................................................................................. 18

List of Tables

Table 1: 0.5% Mini Meter Kit Models & Options ...................................................................... 3

Table 2: Electrical and environmental specifications .............................................................. 6

Table 3: I/O connections ............................................................................................................. 8

Table 4: Display indicators .......................................................................................................... 8

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6PSMT-C02

Surface Mount Mini Meter Kit, LCD Display, Isolated Pulse Outputs

MMSMT-C02

Surface Mount Mini Meter Kit, LCD Display, Isolated Pulse Outputs,
TOU enabled kWh Meter Data Transceiver

MMSMT-D02

Surface Mount Mini Meter Kit, LCD Display, Isolated Pulse Outputs,
TOU and Temperature enabled kWh Meter Data Transceiver

MMSMT-E02

Surface Mount Mini Meter Kit, LCD Display, Isolated Pulse Outputs,
TOU and 1% Delta Temperature enabled kWh Meter Data Transceiver

1. Product Description

1.1 General Description

The Leviton 0.5% Mini Meter is a self-powered, current transformer (CT) rated
electronic kilowatt-hour (kWh) meter designed for permanent connection to an
electrical service. This guide is for use with the 0.5% dual element (1PH 120/240V
or 2PH 120/208V, 3-Wire) Mini Meter in a Surface Mount enclosure.

1.2 Meter Features

 Exceeds Revenue-grade accuracy – 0.5%
 Built in LCD
 Multiple load monitoring with a single meter
 Isolated Pulse outputs
 Tamper Micro Switch
 Optional wireless AMR enabled
 Reverse-phase LED indicator
 5-year warranty

1.3 Meter Certifications

 UL Listed for use in the US or Canada
 NRTL certified compliance with ANSI C12.1 and C12.20 (0.5).
 Wireless option complies with NY DPS and NYSERDA requirements for

revenue grade submeters

1.4 Model Numbers

Table 1: 0.5% Mini Meter Kit Models & Options

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1.4 Physical Description

1.4.1 Mini Meter in Surface Mount Enclosure

Figure 1: Mini Meter Surface Mount enclosure dimensions

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1.4.2 Tamper Protection

Two flat-head screws that secure the enclosure front may be covered with adhesive-type security
seals that indicate tampering when removed. Also, some models provide a tamper indication
through the wireless AMR system when enclosure cover is removed.

1.5 Functional Description

The 6PSMT and MMSMT versions of the Mini Meter accurately quantifies electrical energy usage
of 1PH 3W (2-pole) 120/208V or 120/240V loads. Solid Core Current Transformers are used to
measure current flowing to a load. Energy information (pulses) is recorded by the onboard
wireless transceiver, which time stamps kWh readings in 15-minute intervals and sends it over a
secure wireless network to a Data Concentrating Access Point (DCAP), where data from a
network of meters is stored for on a local computer for billing or energy management functions, or
data can be pushed from the DCAP or pulled from remote locations via an Ethernet connection.

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Input Configurations

1 or 2 Phase, 3 wire

Supply Voltage Range

Min. 102 VAC

(L1 or L2 to Neutral)

Max. 138 VAC

Maximum Input Power, L1 and L2

8 VA

Maximum Rated Current

1

220 A primary

0.11 A secondary

Line Frequency

60 Hz

Power Factor Range

0.5 to 1.0, leading or lagging

Accuracy

+/- 0.5% of registration @ 1.0pf. 2 to 200 A

+/- 0.75% of registration @ 0.5pf, 2 to 200 A

Operating Temperature Range

-20 to +50 degrees C

Rated Pollution Degree2

2

Rated Relative Humidity

80%

Terminal Blocks:
Dinkle/International Connector
EK508-11P or equiv.

4.4 in-lb of torque maximum

2. Technical Specifications

2.1 Electrical Specifications

Mini Meters fall under UL Circuit Category III: a device for measurements
performed in the building installation. The electrical specifications for Mini Meters
are given in the table below.

Table 2: Electrical and environmental specifications

1

Product approved for use with included Leviton Current Transformers, as follows:

200A: Part number CDA01-K12 (black) or CDA01-R12 (red).

2

Pollution Degree 2: Normally only non-conductive pollution occurs. Occasionally, however, a temporary

conductivity caused by condensation must be expected.

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Voltage Inputs (wire connections)

Description

L1

Black wire, voltage input, Line 1, 120V with
respect to neutral

N

White wire, Neutral input

L2

Red wire, voltage input, Line 2, 120V with
respect to neutral

CT Inputs

CT1 : X1

Current Transformer input, CT1. Colored
wire of CT1

Power LED

Tamper Micro

Switch

LCD

Display

Wireless Data

Transceiver

Tamper

Switch

Mini Meter

Load LED

2.2 Input/Output Connections and User Display

Figure 2: Mini Meter connections and display

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CT1 : X2

Current Transformer input, CT1. White
wire of CT1

CT2 : X1

Current Transformer input, CT2. Colored
wire of CT2

CT2 : X2

Current Transformer input, CT2. White
wire of CT2

Outputs

10, Isolated Output (10 Wh/P, Kh = 10)

Isolated pulse output: 5 watthours on, 5
watthours off, referenced to ISOL COM.
Connected at factory to wireless
transceiver.

NOT TO BE USED FOR FIELD WIRING

100, Isolated Output (100 Wh/P, Kh=100)

Isolated pulse output: 50 watthours on, 50
watthours off, referenced to ISOL COM

1000, Isolated Output (1 kWh/P, Kh=1000)

Isolated pulse output: 500 watthours on,
500 watthours off, referenced to ISOL
COM (not available on models with T
suffix)

ISOL COM

Isolated common for 10/100/1000 isolated
outputs

Counter (kh = 100 or kh = 1000)*

For 12 VDC electro-mechanical counter

Counter (kh = 100 or kh = 1000)*

For 12 VDC electro-mechanical counter

+12 VDC

12 V DC output @ 3 mA max.

LED Indicators

Description

Power LED (green)

Illuminates when the meter is supplied with
proper voltage

Load LED (green)

50% duty cycle (at constant load) LED to verify
proper meter function when connected to a
load. At 200 watts, LED will illuminate for 1.5
minutes, then turn off for 1.5 minutes; with no
load, LED will remain on or off

Reverse Phase LED (red)

Illuminates when a problem with meter
phasing exists. With no load, LED may be on
or off. See section 3.7 for CT installation
instructions

LCD Display

LCD displays shows total kWh

Table 3: I/O connections

*Recommend Leviton counter MPCTR-1KW (1 kWh models), MPCTR-TKW (0.1 kWh models)
or equivalent

Table 4: Display indicators

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Indicates the need to consult the operation manual due
to the presence of a potential hazard.

Indicates the presence of electric shock hazards. Prior
to proceeding, de-energize the circuit and consult the
operation manual.

Indicates that the equipment is protected throughout by
double insulation.

WARNING

 Warning: To avoid fire, shock or death, turn off all power supplying the

equipment before performing any wiring operations. Use a properly
rated voltage sensing device to confirm power is off.

 Installation of electric meters requires working with possibly hazardous

voltages. These instructions are meant to be a supplement to aid
trained, qualified professionals.

 Bonding is not automatic for metal conduit connections; separate

bonding is to be provided.

 Installations should be done in accordance with local codes and current

National Electric Code requirements.

 Equipment used in a manner not specified by this document impairs the

protection provided by the equipment.

Failure to follow these warnings could result in serious injury or death.

3. Installation Instructions

The following section contains installation and wiring instructions for the Leviton Mini
Meter in indoor Surface Mount enclosure.

Leviton is not responsible for damage to the meter caused by incorrect wiring.

3.1. Explanation of Warning Symbols

3.2 Safety Precautions

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3.3 Preparation

1. Verify the model number and electrical specifications of the device being
installed to confirm they are appropriate for the intended electrical service (see
Section 2).

2. Consult local codes for any possible permits or inspections required before
beginning electrical work.

3. Make sure all tools to be used during installation have proper insulation
ratings.

4. Check the Mini Meter and electrical panel for possible exposed wire, broken
wire, damaged components or loose connections.

3.4 List of Materials

 Mini Meter, Surface Mount enclosure and associated mounting materials, four

#6 x 1⅝ drywall screws.

 Additional wiring for CT or voltage leads extension if needed. Wires must be

18 AWG or thicker and insulated for 300 VAC min.

 Current Transformers (CTs): This product is designed for use with Leviton

CTs; see Section 2.2 for details.

3.5 Setting up the Enclosure

3.5.1 Selecting a Mounting Location
 Mini Meter Surface Mount enclosures require a switch or circuit

breaker as part of the building installation.

 The switch or circuit breaker must be marked as the disconnecting

device for the Mini Meter.

 It is recommended that the enclosure be mounted near the

disconnecting device.

 Ensure that the CT and voltage lead lengths are capable of reaching

the enclosure from the load center.

 If a suitable mounting location near the load center cannot be found,

additional in line fuses or circuit breaker may be required in
accordance with NEC regulations.

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Confirm that service is disconnected before any connections
are made.

Warning: To avoid fire, shock or death, always open or
disconnect the circuit from the power distribution system of a
building before installing or servicing current transformers.

In accordance with NEC, CTs may not be installed in any panel
board where they exceed 75% of the wiring space of any cross­sectional area.

3.5.2 Making Conduit Openings
It is recommended that wire holes be placed in the lower left compartment

of the Surface Mount enclosure, just below the Mini Meter I/O terminal
block. Wire hole sizes must be appropriate to fittings, and large enough to
fit all voltage and CT wiring (4-7 18 AWG min. wires insulated for 300 V
min.).

3.6 Installation of Voltage Lines

1. Based on desired mounting location, check if additional in-line fuses are

required to meet local electric codes. (See section 3.8 for mounting location
requirements and recommendations).

2. Mini Meters come standard with voltage wires pre-connected to the metering

board.

3. Route wires through to the breaker panel.

4. Trim wires to the appropriate length to avoid coils of excess wiring and strip to

approximately 0.300 inches.

5. Following all national and local electric codes, connect wires to appropriate

locations in the load center. Wires should be tightened so that they are held
snuggly in place, but do not to over-tighten, as this may compress and
weaken the conductor. See figure 5 for Mini Meter wiring diagram.

3.7 Installation of Current Transformers

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General Requirements:

 Field wired CT connections are made to the Mini Meter terminal block. The rated

torque for these terminal blocks is 4.4 in-lb, and can be used with solid and
stranded copper wires, at 12-18 AWG.

 Splices on the CT leads must be within the meter enclosure, not inside the

conduit.
Leviton-provided CT leads are approximately 48 inches. Wire insulation should
be stripped so that the bare conductor length that connects to the meter terminal
block does not exceed 0.300 inches.

 CTs should be securely fastened such that they will not slide down to live

terminals.

 Wires should be tightened so that they are held snuggly in place, but do not to

over-tighten, as this may compress and weaken the conductor.

 Current and voltage inputs must be installed ‘in phase’ for accurate readings (e.g.

CT1 on Line 1, CT2 on Line 2); see Figure 5.

 Leviton solid core CTs (Figure 3): In accordance with CT label, the LINE side of

CT must face incoming Line. White lead connects to X2 of CT connection
(CT1:X2 or CT2:X2). Colored lead connects to X1 of the corresponding CT
connection (CT1:X1 or CT2:X1).

Figure 3: Leviton solid core CTs

Installing solid core CTs

1. Route CT wires through the drywall cutout into the meter backside enclosure,

if not already done, then attach to meter per figure 1.

2. Trim the wire to the appropriate length to avoid coils of excess wiring.

3. Strip wiring to approximately .300 inches and connect to the appropriate

terminals as described above.

4. With power turned off, disconnect each monitored conductor and slide on a

CT, ensuring the CT is correctly oriented as noted above.

5. Reconnect the conductors.

Failure to install CTs in the correct orientation and on the correct phase will lead
to inaccurate meter readings. The Mini Meter wiring diagram is shown in Figure

5.

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Figure 4A

Figure 4B

3.8 Surface Mount Enclosure Installation

The Surface Mount Enclosure uses four drywall anchors and screws (included) for
mounting.

1. Select a desired installation location following the guidelines of 3.5.1.

2. Using the “enclosure base” as template mark the four mounting holes on the wall
(See Figure 4A)

3. Remove “enclosure base” and insert the anchors into the drywall.

4. Determine which enclosure base “knockout” to remove for CT and voltage leads.
(See Figure 4B)

5. Make a 1-2 inch diameter hole in drywall to bring the CT and voltage leads wires
through.

6. Place the enclosure base on the wall inserting the wires through the knockout.

7. Mount the enclosure base to the wall with the four screws included.

8. Verify wiring per Sections 3.6 and 3.7

9. After running the tests in Section 3.9, place the cover on the meter and attach with the
provided screws.

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Figure 4: Mini Meter hookup diagram

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3.9 Testing the Installation
Testing Voltage

The power LED illuminates when the Mini Meter has a proper power supply.
Voltage should also be tested using an AC Voltmeter to verify that the voltage
across voltage line terminals (L1 to Neutral and L2 to Neutral) is not in excess of
the maximum rated voltage in section 2.2.

CT Reverse Phase Indicator

Mini Meters have a red reverse phase indicator LED as described in section 2.3.

A load current of at least 1 Amp must be present through one of the CT
primary circuits in order for the reverse phase LED to function correctly. If

a proper load is connected, and the LED is illuminated, power down the voltage
supply and verify that CTs are installed correctly.

Load LED

The load LED is described in Table 4. This LED should be cycling at 50% duty
cycle when the meter is connected properly and a constant load is applied.

4. Wireless Automatic Meter Reading

Built into MMSMT models are a wireless Meter Data Transceiver (MDT) as shown in
Figure 2. Six wires connect between transceiver and the Mini Meter. The
transceiver logs and time stamps accumulated pulses in 15 minute intervals and
sends the data via a mesh network of transceivers and repeaters (if required) to a
Data Concentrating Access Point (DCAP). Repeaters and DCAPs are sold
separately.

4.1 MDT Power and Pulse input are pre-wired to isolated pulse output terminals:

4.1.1 Power: Red wire to meter terminal +12 VDC and black to terminal CNT.

4.1.2 Meter Pulse Input: Green wire to terminal 10 and black to ISOL COM.

4.1.3 Tamper Switch: White and black to tamper proof micro-switch.

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Figure 5: Wireless Network consisting of MDTs, Repeater, DCAP

9.1 Network Activation

For complete wireless system commissioning information, consult the Tehama
QuickStart Guide-1212A.docx

DCAP

A Tehama Network starts with the DCAP. Without a DCAP there are no originating
Beacons and therefore no Network to join. Thus it needs to be the first device that is
installed and powered.

With the DCAP in place and plugged in, the Repeater Backbone can then be
installed.

Repeaters

Repeaters should be powered up starting with those closest to the DCAP and
working your way out to the remote edges of the property. This will allow remote
Repeaters to see the Network Backbone when they are turned on. Powering up in
this order is not necessarily critical, but if not followed then the power-up LED
indications on a remote Repeater may not provide the useful feedback to the
installer that it has successfully joined the Network.

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Once the Repeaters are in place, you can use the Commissioning and Installation
Tool (CIT) software (supplied on disc with purchase of the DCAP) to observe the
performance of the network backbone.

MDTs

Once the Network is in place, you can begin to place the MDTs in their locations and
turn them on. Alternatively the MDTs can be installed with the meters in the off
state. As soon as the meter begins to generate pulses, the first pulse will
automatically turn on the MDT and begin to transmit.

MDTs can also be placed and turned on before the Network Backbone is up and
operating, but there are a few disadvantages:

MDTs could take up to four hours to check in after the Network Backbone is put

•

in place.

You don’t get the LED feedback that gives you instant feedback that the MDT is

•

communicating successfully with the Network.
Placement:

Like repeaters, MDTs should not be mounted inside a metal box or near a metal

•

wall (i.e. heating furnace or electrical panel).

MDTs must be mounted using velcro, tie-wraps, or screws. Don’t let the MDT

•

dangle by the pulse input wire.

Avoid locations with dampness, high humidity, or an abundance of mold.

•

MDT & Repeater power-up

MDT and Repeater devices come from the factory in a powered off state. They
need to be powered up during the commissioning process so they can register with
the DCAP. MDT’s must be wired to the meter described in Section 4.1 in order to
commission the device.

The yellow circle shows where a hidden button is on the enclosure. It may take a
few times to get the feel of it, but an LED in the clear window to the right gives you
feedback when the button is pushed.

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Figure 6: Tehama Wireless MDT

To turn a device ON, press and hold the button until the LED flashes off (about

•

four seconds) then release the button.

After about 30 seconds the LED flash frequency should change from slow to fast.

•

After another 30 seconds or so, the LED will stay solid for 10 seconds then go out.
The long flash indicates the device is communicating with the network.

To turn a device OFF, press and hold the button until the LED flashes off (about

•

four seconds) then release the button. The unit will give a double flash indicating the
off state.

LED Flash Indication States during power-up

Slow flash: The device is listening for Beacons from a DCAP and/or Repeaters.
Rapid Flash: The device has heard a DCAP and/or Repeater and is in process of

joining the Network.
Solid Flash: The device has confirmation that it has successfully joined the Network.

LED Flash indication States when button is momentarily pressed

Single Flash: The device is in a light sleep mode. It will wake up every so often to
listen for Beacons.

Double Flash: The device is OFF
10 second on: The device is successfully communicating with a Network.

Note that a light sleep mode is entered when a device is turned on but cannot hear a
radio network beacon. If no network is present, a device will stay in the slow flash
state for 90 seconds then go to sleep for some time before trying to listen again for a
beacon. It is highly recommended a device be turned off if no Network is nearby.

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Problem

Solution

1. Power LED not illuminated

 Check to make sure all connections are

wired according to section 3.6

 Test the voltage being supplied to the

meter using an AC voltmeter

 With power off, remove any additional

line fuses and test with ohmmeter

2. Load LED not flashing

 Verify CT connections and orientations

(see Section 3.7)

 Make sure there is sufficient load to

draw a significant current

 Test the voltage being supplied to the

meter using an AC voltmeter

3. Registered consumption low

 Check to make sure the reverse phase

LED is not on

 Even if the reverse phase light is off,

double-check CT orientations. One CT
installed in the incorrect direction
doesn’t always illuminate the reverse
phase LED

 Make sure that current and voltage

connections are in phase (see Sections

3.6 and 3.7)

 Check power connections and fuses

4. Reverse phase LED illuminated

 Verify orientation and connection of CT

wires (see Section 3.7)

 Ensure that phasing is correct (CT1 on

Line 1, CT2 on Line 2)

 Verify that a load drawing more than 1

Amp is connected to the meter

5. Maintenance

Properly installed meters with sound connections and secure conduit fittings should not
require user maintenance. If the meter is functioning abnormally, consult the
FAQ/Troubleshooting guide in Section 7.

6. Troubleshooting/FAQ

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 Note: Refer to section 3.2 before

proceeding.

 Verify wireless AMR is wired correctly

per Section 4.1.

 Verify wireless network commissioning

per section 4.2.

5. Wireless AMR communication not
operating

FAQ
Q: What is AMR equipment?

A: AMR is Automatic Meter Reading equipment. This typically consists of radio
transmitters, repeaters and a collector that monitors, records, and is capable of
transmitting data to a third party billing service (RBC).

Q: Why are the current transformers color coded (Black & white, red & white, and
blue & white)?

A: CT1 needs to monitor the same phase used to power the meter on line 1, CT2 needs
to monitor the same phase used to power line 2. Color coding helps the installer
maintain correct phasing.

Q: Can the meters be tampered with after installation?

A: The Surface Mount enclosures provide two drilled fillister head screws through which
wire seals can be installed. Also, tamper-evident labels can be affixed to the cover after
installation.

Q: Can voltage input wires and current transformer secondary leads be routed
through the same conduit?

A: Yes, provided Leviton supplied CTs are used.

Q: I accidentally installed my CTs backwards; can I switch the X1 and X2 terminal
connections instead of flipping the CT?

A: Yes, but this practice is not recommended as service technicians may believe that
meter is wired incorrectly.

Q: I still can’t get my meter to work, what now?

A: Contact technical support via phone or on our website given in the following section.

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0% Restock Charge
25% Restock Charge

*Prices as of May 01, 2009 and subject to change

7. Returned Material Policy and Warranty Information

After acceptance, all sales of meters are final. Leviton, in its sole discretion, authorizes
product returns in appropriate circumstances, subject to such conditions as Leviton may
specify. Any such return is subject to the express prior authorization and approval of
Leviton. Buyer must notify Leviton at 800-736-6682 (telephone) or 503-404-5594 (fax)
and request a Returned Material Authorization Number (RMA Number) and state the
specific reason for return. Unauthorized returns will not be accepted.

When requesting an RMA Number please supply the following information:

1. Distributors name and address

2. Model number of meter

3. Original purchase order number

4. Reason for return

All paperwork and boxes must be marked with an RMA number issued by Leviton. All
authorized returned materials must be shipped freight prepaid to Leviton to the address
specified below. Leviton is not responsible for uninsured packages or packages lost by
your carrier.

Leviton 20497 SW Teton Avenue Tualatin, Oregon 97062
All returns are subject to a handling/restocking charge, except for product shipped in error or

products under warranty. All charges (modification, repair, restock etc) related to returned
products will be determined by Leviton upon evaluation. All shipping costs are the responsibility
of the buyer.

METERS RETURNED FOR CREDIT*

Replacement meter ordered

 RMA Number requested by stocking distributor for credit must be

accompanied by a purchase order for material of equal or greater value.

NO replacement meter ordered

METERS RETURNED FOR REPAIR (STILL UNDER WARRANTY)*

No defects found $75.00 evaluation charge
Defects not covered under warranty Charges upon evaluation
Defects found covered under warranty No Charge

METERS RETURNED FOR EVALUATION (NO LONGER UNDER WARRANTY)*

Evaluation charge of $75.00 applies
Other charges will apply depending on evaluation by Leviton

Leviton Manufacturing Co., Inc. 21

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