TPG DPM-3221 User manual

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DPM-3221
Digital DC Power Meter with Data logging capability
User Manual
Introduction
The DPM-3221 digital DC Power Meter measures and displays in real time; DC Voltage (0-60V), DC Current (0-
200A with a 200A/50mV* external shunt) andWatts (0-12000W). It also displays; Amp-hour, Watt-hour, maximum or
peak Watts, running time since Power Meter start up and minimum and maximum values of voltage and current
during the measuring period. The power for the meter can either be from the source or the load whichever has a
minimum 5V DC available (only voltages between 5V and 60V can be measured when powered in this way). The
Power Meter can also be powered by an external DC voltage of 5 to 60VDC, which then allows a voltage
measurement range of 0-60V. Once the Power Meter is powered up it starts to display and log the Voltage and
Current. It also displays Wattage, Amp-hours, Watt-hours, Max. & Min. Voltage and Current and peak Watts. The
logged data values are recorded at 30s to 180s intervals. Up to 1,500 sets of data can be stored in the Power
Meter’s Memory (EEPROM) so even when the Power Meter is powered down, data is retained. The data can be
retrieved by a PC using the optional Data Adapter (DPA-3051) and a software program provided. Unless reset, the
last set of data values; Ah, Wh, peak Current, peak Watts, (and sometimes min. and peak Voltage), is retained
and displayed when the DM-3221 is powered up. A new group of data (up to 20) is created each time. The Power
Meter can be mounted using the Snap-On bracket provided or magnetically on ferrous metal surfaces. *50A/50mV
and 100A/50mV shunts may also be used with current ranges of 0-50A and 0-100A respectively.
Precautions
a. Do not exceed 60V DC when using the Power Meter.
b. This meter is designed for indoor use only.
c. Do not disassemble or attempt to repair the Power Meter. Return it to your service agent for repair.
d. If the start-up screen does not appear, immediatelyremove the power source.
e. Double check the correct input and output polarity. If the input connection has the wrong polarity, the LCD
display will not show. Wrong polarity on the output may result in excessive current flow.
f. Damageto the Power Meter may result if voltage is applied with the wrong polarity.
g. Do not exert pressure directly on the LCD display as damage may occur.
Controls and Indicators
FRONT
1. Shunt connector : Flat cable with phone plug RJ12 6P/4C.
2. LCD Display : Displays: V, A, andW continuously.
Scrolling display : Amp Hour (Ah), Watt Hour (Wh), Peak Voltage (Vp), Peak Current (Ap), Peak Watts
(Wp), Min. Voltage (Vm) or sag, Min. Current (Am) and total time since power up.
3. Scrolling display : Any one of the scrolling displays can be halted at any time (and also released) by one
quick press of the "Reset" button (5)

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SIDE
3. External Power Socket:
An external power source (5-60VDC) extends the measured voltage range from 5-60V to 0-60V.
Pins: 5V-GND-RC
5V = +5V to +60V external DC source.
GND = Ground or negative of external DC source.
RC = Remote Clear, this is for deleting the stored data and setting the shunt rating.
4. Phono Socket: for connectionto optional Data Adapter (DPA-3051).
5. Reset Switch: To clear saved data and to setup the unit and halt/continue display scrolling.
Connector
PIN
F
un
c
t
i
on
D
e
sc
rip
t
i
on
Wire
Colour
1C- SENSOR - Silver
2C+ SENSOR + Yellow
3NC No Connection Green
4NC No Connection Brown
5V+ Voltage + Black
6GND Voltage - Blue

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Wiring Diagram
Optional external DC supply
required if Source 0-60V.
Operation and Display Screens:
Installation of the DC Power Meter:
1. First connect a DC source to the meter and check that the DPM powers up. If no display appears then
check for reverse polarity and ensure that the voltage is greater than 5 Volts.
2. The last set of accumulated data will appear on the LCD. The old data can be cleared by pressing the
Reset Button for 5 seconds twice. See the “Resetting the DPM-3221” section for more information.
3. Connect the remaining leads to complete the installation of the DC Power Meter.

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DISPLAYS:
A. On first powering up the display, the firmware version and factory preset data port mode are shown. Then
it briefly shows the preset shunt rating of the DPM and finally the data display appears.
B. On the data display, the Volts, Amp and Watt are continuously displayed; all other data is shown
cyclically at about 3 second intervals. The display can be toggled between fixed and cyclical by one
quick press of the "Reset" button (5).
1. Current (Amps - A, Peak Amps - Ap, Minimum Amps - Am):
The Amps value is the average current through the Meter's black wire over the last screen update
interval. Ap is the Peak (maximum) current to the LOAD, since start up to the present time .
Similarly, Am is the minimum current.
2. Voltage (Volts - V, Maximum Voltage – Vp, Minimum Voltage - Vm):
The Volts value is the average voltage over the last screen update interval. Vp is the Peak (maximum)
voltage from the source side since start up to the present time. Similarly for Vm (minimum) which is the
minimum voltage, voltage dip or sag on the source side since start up.
3. Charge (Amp-hours -Ah):
The value displayed is the total charge in Amp-hours delivered to the LOAD since start up. The Amp-
hours is determined using the internal clock of the MCU.
4. Energy (Watt-hours - Wh):
The value displayed is the total energy delivered to the LOAD in Watt-hours since start up. The Watt-
hours is determined using the internal clock of the MCU.
5. Power (Watts - W, Peak Watts - Wp):
The value displayed is the average power delivered in Meter over the last screen update interval. The
displayed Peak Wattsvalue (Wp) is the maximum power drawn of the LOAD, since start up.
C. Operation time since start up:
The second line displays the elapsed time since start up in HH:MM:SS format.

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Setting the Shunt rating of the DPM
If you want to change the DPM shunt rating to match your shunt, proceed as follows:
1. After checking the DPM is in good order, power down the unit – if necessary, unplug the phone jack from
the interconnector.
2. Plug in the supplied external power plug into the 5V-GND-RC socket. A 9V battery connected to the
positive (red) wire and negative (black) wire is best to power the unit whilst the shunt rating is being set.
3. Power up the unit and when the “External Shunt” is displayed, press and hold the reset button for 3
seconds.
4. Release the reset button and note that the LCD will show the current DPM shunt setting. Fig. 1.
5. A quick press on the Reset Button will cycle the shunt setting from 100A to 200 A. Press again for 50A
and again to go back to 100A. Fig. 1, 2 and 3. Select the required shunt setting in this way.
6. Make a quick connection of the black (GND) and white (RC) wires to confirm the currently displayed
shunt setting and the LCD will then show the normal data display. Fig. 4.
7. Power down the unit and power up again and verify that the “External Shunt” is set correctly.
8. Plug the phone jack into the new shunt and check that the readings are correct.

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Resetting the DPM-3221
There are two ways to clear the previously stored data.
1. Press and hold the Reset button (5) until the LCD display indicates “Press again 5 seconds to
reset”, then release the Reset button and press again holding for 5 seconds to delete the data.
2. Use the external power source socket and connect the remote I/O (white wire) as shown below. This is
marked RC on the side of the DPM to the GND or negative terminal (black wire) for 3 seconds.
All previously recorded data is then erased.

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SPECIFICATIONS
Model DPM-3221 (For use with external shunt)
Measured Parameters 50A/50mV 100A/50mV 200A/50mV
Current Range Amp (A) 0-50A cont. 0-100A cont. 0-200A cont.
Voltage Range Volt (V) 5-60V or 0-60V with external DC source
Power Watt (W) Max. recordedW:12,000W
Resolution of W:0.1W forW<10,000
1W for W>10,000
Resolution of V&I 0.01V,0.01A 0.01V,0.02A 0.01V,0.05A
Scrolling Display of Registered Parameters:
Ampere Hour (Ah) Max. recorded Ah: 99,999Ah
Resolution of Ah: 0.01Ah for total recorded Ah <1,000Ah
0.1Ah for 10,000 > total recorded Ah > 1,000Ah
1Ah for total recorded Ah > 10,000Ah
Peak Watt (Wp) registered Max. recordedW: 12,000W
Resolution of W: 0.1W
Energy: Kilo Watt Hour (kWh) Max. recorded kWh: 9999.9kWh
Resolution of
k
W
h
: 0.1
k
W
h
Registered Peak Voltage(Vp),
Min.Voltage(Vm), Peak Current(Ap),
Min. Current(Am), Peak Watt(Wp)
The new high and low values of voltage and current will
replace the old ones during the metering period and
registered at the end of the metering period
Accumulative Max. Operation
Period logged 75 hours (180s or 3 min. data logging interval, 1500 samples)
Scrolling speed on LCD 3 seconds for one parameter
Data logging interval Selectable from 30s to 180s
Operation Voltage and Current 5-60V, 12mA
External DC Source Range 5-60V, 8mA-12mA
Operation Condition 0°C to 50°C, non-condensing humidity
Storage Condition -10°C to 60 ° C
Construction
LCD Display VA = 54mm x 14.4mm, 16 character x 2 row STN 5*8 dots
Housing Material Polycarbonate
Dimension &Weight 75(L) x 45(W) x 23(D) mm 100g approx.
Supplied Accessories User manual, snap-on mount & external power cable with plug,
phone cable with RJ-12 6P/4C plug, inline RJ-12 coupling.
Optional Accessories 1. Data adapter module and software for data logging.
2. External DC power box with plug.
3. External shunt modules with 5m phone cable and RJ-12
6P/4C plug.
Approvals CE EN 61326 , FCC