Manson Engineering Industrial DPM-3321 User manual

DPM-3321
Bi-directional Digital DC Power Meter
with built-in USB data logger & adapter
External shunt model
User Manual
Bi-Directional DC Power Meter with built-in USB data logger & adapter.
The new DPM-3321 is an upgrade version of previous DPM series. It measures current in both
direction, using a battery as the reference, it measures the Charging and Discharging current.
DPM-3321 is a self contained with built in data adapter for data retrieval to PC* via USB port and
for real time monitoring.
In addition to USB, it can be connected through Bluetooth* for Bluetooth model. The new EEPROM
is increased to 3,600 sets of data.
The direction of current is with reference to the receiving end (output) typically a battery.
Current(charging) going to battery is Positive (+) and current out of battery (discharging) is
Negative(-).
The power meter is powered up by 5-60V dc from either side or an external USB power bank for
extended measured dc voltage range of 0-60V.
*Remark: PC software, driver, software and Bluetooth manual can be download from
http://www.manson.com.hk/product/dpm-3321/
Precaution
a. Do not exceed 60V DC in application of DC Meter.
b. This meter is designed and made for indoor use only.
c. Do not disassemble or attempt to repair the power meter.
d. If Start up screen does not appear, immediate remove all input and output connections power
sources.
e. Double check on the correct polarity. If either input or output connection is in wrong polarity,
there is no display on LCD.
f. Damage to the Power Meter may result if wrong polarity power is applied.
g. Do not exert pressure on the display to avoid damage to LCD display.

Controls, Indicators & terminals
FRONT
Shunt connect flat cable with phone plug
LCD Display: Constant displays: V, A, and W.
Scrolling Displays: Two sets of values for most parameters, the positive value means current
going into the battery and the negative value means current coming out of
the battery .
Parameters: Time period in use, Ah (Amp Hour), WH (Watt Hour),
Vp (max voltage), Ap (max.current), Wp ( max.Watt),
Vm (min.Voltage), Negative: -Ah, -WH, -A P, -Wp back to
Time period in use.
Freeze Scrolling display: Hold and release of any scrolling display by
quick press of RESET button.
SIDE
Micro USB socket: Either for connection to PC for data retrieval & real time monitoring.
Or for connection to External Power source (such as 5V USB Power
Bank) to extend voltage range from 5V-60V to 0V-60V.
Reset Switch: To set the data logging interval from 30 sec to 180 sec.
To clear old data.
To freeze and release rolling display 4.

Wiring Diagram
Bi-directional Connections with 5-60V DC range

Bi-directional application with external DC for 0-60V meter range
Bi-directional application connect to PC
*Remark: PC software, driver, software and Bluetooth manual can be download from
http://www.manson.com.hk/product/dpm-3321/

Unidirectional Connections
When used in unidirectional applications, there is no negative current.
The following are some examples for meter connections.
Unidirectional application with external DC for 0-60V meter range

Unidirectional Application Connect to a PC*
*Remark: PC software, driver, software and Bluetooth manual can be download from
http://www.manson.com.hk/product/dpm-3321/

Operations and Displays
Installation
Connect shunt according to one of the connect in bidirectional or unidirectional connection diagram.
Then connect DPM-3321 to shunt. The DPM will start up and show information in following
sequence.
Software version
Shunt rating
Sampling time
Normal operation
Set shunt rating of DPM
In case it is need to change the DPM shunt rating to match your shunt, proceed as following:
1. Disconnect phone plug from shunt.
2. Press and hold the reset button. Then reconnect the phone plug to shunt.
3. The LCD displays present shunt setting.
4. Release the reset button.
5. Quick press on the reset button to select the your shunt rating in 50A, 100A or 200A.
6. Press and hold the reset button until the LCD displays Sample time.
7. Unplug and replug the phone jack to check if your new shunt setting has been successful.

Set data logging time interval
1. On powering up DPM will display “Version No. & USB” and shunt rating then “Sampling time”.
To enter sampling time setup mode, PRESS and HOLD the “RESET” button within 5 second of
“Sampling time” being on display.
2. The sampling time can be adjusted between 30s and 180s.
It starts with the setup of the far left digit at the hundred position first then the second and third
digit.
The number being set is flashing.
3. Short presses of “RESET” button to change value in the digit.
4. PRESS and HOLD the “RESET” button to confirm the chosen digit in the number.
It will show “OK” then go to set next digit.
5. Repeat step 3 and step 4 for all digits.
6. After all three digits are set, it will display a “Y” meaning YES for you to confirm by a long press
of the RESET.
7. In case you want to change the new setting, a short press at the “RESET” button to change “Y”
to “N” followed by a long press at the RESET to do the whole new setting of sampling period.
8. In the case the setting is correct, then PRESS and HOLD “RESET” button to confirm the value.
It will show OK to confirm sampling time setting. Then the DPM go to operation mode.

D I S P L AY I ndications
1. On the first power up the display shows the firmware version and factory preset data port
mode.
2. Sampling time setting
3. Measured Data Displays
The data in the scrolling quadrant: Time period in use, Ah(Amp Hour), WH(Watt Hour), Vp(max
voltage), Ap(max.current), Wp( max.Watt), Vm(min.Voltage), Negative: -Ah, -WH, -A P, -Wp back to
Time period in use, can be fixed and released by one quick press of the Reset button.
Current (Amps A, Peak Amps Ap, - Amps):
The Amps value is the average current through the Meter's black wire over the last screen update
interval.
Ap is the Peak (maximum) is current to the LOAD side, since the start up screen to the present
moment. Similarly for negative Ap.
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 & Vm (minimum) from the source side since start up screen to
the present moment. There is no negative Vp or Vm registered .
Charge (Amp-hours Ah , negative amp hour Ah):
Ah is total amp-hour delivered to the battery while negative Ah is the total Ah discharge from
battery since start up synchronized with the internal clock of the MCU.
Energy (Watt-hours Wh and negative Watt hour ):
Wh is total watt-hour delivered to the battery while negative Wh is the total Wh discharge from
battery since start up synchronized with the internal clock of the MCU.
Power (Watts W, Peak Watts Wp, negative Watts W, negative Peak Watt):
The W value displayed is the average power delivered to the battery wie negative W is the
discharge W from the battery over the last screen update interval. The displayed Peak Watts value
(Wp) is the maximum power delivered to the battery and negative Wp is the maximum power
discharged from battery...

Display duration time after power ON
Reset DPM
The stored data can be reset to 0 by using reset button.
Press and hold the Reset button until the LCD display show “Press again 5 seconds to reset”,
Then release the Reset button quickly, press again and hold 5 seconds to delete all the stored
measured data.
Charger Data Log Graph

Discharger Data Log Graph

Specifications
Measured Parameters
Current Range Amp.
50A / 50mV
100A / 50mV
200A / 50mV
-50 to 50A
-100 to 100A
-200 to 200A
Voltage Range Volt.
5-60V or 0-60V with external DC source
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; -99,999Ah
Resolution of AH:
0.01AH for -1,000Ah< total recorded AH < 1,000AH
0.1AH for 10,000 > total recorded AH > 1,000AH
or -10,000 < total recorded AH < -1,000AH
1AH for total recorded AH > 10,000AH
or total recorded Ah< -10,000AH
Resolution of Ah according
to total Ah stored
Total Ah stored
Ah<1,000
1,000<Ah<10,000
Ah>10,000
Resolution
0.01Ah
0.1Ah
1Ah
Power Watt (Wp) registered
Max. recorded W: 12,000W ; -12,000W
Resolution of W: 0.1W for W<10,000W
1W for W>10,000W
Energy: Kilo Watt Hour (KWH)
Max. recorded KWH: 9999.9KWH ; -999.9KWH
Resolution of KWH: 0.1KWH
Registered Peak Voltage (Vp),
Min. Voltage (Vm), P
eak Current
(Ap), Negative Peak Current (-Ap)
The new high and low values of voltage and current will
replace the old ones during the metering period and
registered at the finish of the metering period.
Accumulative Max. Operation
Period logged
180 hours
Scrolling speed on LCD
3 seconds for one parameter
Data logging interval
selectable from 30s to 180s
Operation Voltage & Current
5-60V and 20mA
5V USB Power Bank
5V, 20mA
Operation Condition
0-40°C, non condensing humidity
Storage Condition
Minus -10°C -60°C
Construction
LCD Display
VA=54x14.4mm, 16 character x 2 row STN 5*8 dots
Housing Material
Poly-Carbonate
Dimension & Weight
75(L) x 45(W) x 23(D) mm 100g approx.
Supplied Accessories
Snap-on mounter, 2 screw-on type connector blocks,
USB cable, Inline coupler connector
Approvals
CE EN 61326
REV. 0.1 2018/12 7673-3321-0560