l Application 1: The maximum DC voltage output is 1550 V, which meets the requirements of the 1.15 Un voltage test of the 1 kV electric energy meter; the maximum DC current output is 600 A, which meets the requirements of the 1.2 In current test of the 100 A electric energy meter. With the power pulse measurement function, it can complete the test of direct connected DC energy meter.

l Application 2: The instrument has a four-wire small signal voltage source of 10 μV ~ 4.4 V, coupled with a 1550 V DC voltage source and energy pulse measurement function, it can carry out testing related to indirect connected DC energy meters.

l Application 3: The instrument supports a maximum current output of 600 A, and with a 1550 V DC voltage source and energy pulse measurement function, it can carry out testing work related to the indirect connected DC energy meter and the DC shunt as a whole.

l Verification items: basic error, starting test, latent movement test, instrument constant test, clock daily timing error.

While the technical specifications of TD1548 cover mainstream specifications of DC energy meter test instruments, the voltage/current measurement uncertainty reaches 0.005%, and the power/electric energy measurement uncertainty reaches 0.01%, meeting the DC standard energy meter calibration requirements.

l DC High Current Standard Source: the maximum output reaches 600 A, which can be used as the primary current input of the DC shunt.

l DC Small Signal Voltmeter: supports voltage input range from 10 μV to 4.4 V, and can measure the secondary output voltage of the shunt.

l Special Low Thermoelectric Potential Wires And Terminal Blocks: effectively reduce the measurement uncertainty caused by contact potential and thermoelectric potential.

l Manual Crimping Device For Shunts: manually press the current terminals of the shunt and connect them to the current source to form a current loop.

DC Shunt Calibration and Testing: The resistance and basic error of the shunt can be measured, and the R(t) curve can be drawn to provide an effective testing method for analyzing the shunt parameters.

• The DC voltage output can reach up to 1550 V, and the DC current output can reach up to 600 A. It has a standard DC charger interface, and with the power pulse measurement function, it can complete the calibration of the DC EV charger tester.

• Advantages: It avoids the need to use additional adapters for connection during the calibration experiment of the DC EV charger tester, simplifies the experimental wiring operation, and improves efficiency.

l Calibrate DC Voltmeters and Ammeters: The device has a built-in DC voltage standard source with an output range of 10 mV to 1550 V and a DC current standard source with an output range of 1 mA to 600 A. The voltage and current accuracy of the device reaches 0.005%, which is suitable for calibrating DC voltmeter or ammeter with accuracy of 0.02% and below.

l Calibrate DC Power Meter: a virtual power standard source composed of independent output of DC voltage and current, and the accuracy of the device reaches 0.01%. It is suitable for calibrating DC power meters with accuracy of 0.05% and below.

Advantages: It integrates a multi-functional DC standard source with excellent accuracy and stability indicators. It can be regarded as a mobile small DC electrical laboratory. By purchasing this instrument, users can cover the calibration of commonly used DC instruments, which is beneficial to reducing the user's initial investment and is both practical and economical.

S/N

Description

The multi-functional multi-meter calibration platform not only calibrates direct-connected or indirect-connected DC energy meters automatically but also calibrates DC shunts and DC charger testers. It features a built-in high-definition display for easy observation and recording of meter status during testing.

Highly stable voltage source with output voltage up to 1550 V.

Highly stable current source with output current up to 600 A.

Mobile console, which can observe or control the value output through its LCD touch screen.

The host computer has built-in fully automatic calibration software and supports semi-automatic or fully automatic calibration of DC energy meters, data management and certificate export.

The printer supports printing of data results and calibration certificates.

l Four-wire Small Signal Voltage Source: It can accurately output ± (10 μV ~ 4.4 V) small signal voltage signal as the current input of the indirect-connected DC energy meter (the shunt specifications can be set and displayed according to its primary current).

Advantages: It adopts a four-wire Kelvin connection method and is equipped with low thermoelectric potential terminal blocks and wires. Compared with the traditional two-wire voltage source, it can effectively eliminate the influence of wire resistance, contact potential and thermoelectric potential on the measurement.

l Manual Crimping Device for Shunts: Manually press the current terminals of the shunt under inspection and connect them with the current source to form a current loop; with the DC small signal voltage measurement function, it can calibrate the DC shunt.

Advantages: Compared with traditional wiring, the crimping device effectively improves the convenience of test operations.

The built-in clock module with an accuracy of 0.2 ppm can accurately measure the second pulse signal and conduct daily timing error testing.

It has a built-in GPS module and can be connected to an antenna to receive the GPS standard clock signal and synchronize the DC energy meter to Beijing time. With high-precision time scale, it is convenient for statistics and test analysis.

l Each meter unit has a built-in auxiliary power supply, which can provide DC 24 V or AC 220 V power supply for Class A energy meters.

Advantages: It has built-in AC and DC voltage sources required for the calibration of Class A electric energy meters. The AC and DC power output can be satisfied through a pair of power supply terminals, which not only reduces the initial investment, but also simplifies the wiring operation.

• Equipped with automated calibration software, it can be adapted to test various electrical measuring instruments and automatically generate test reports to improve detection efficiency;

• Supports fully automatic or semi-automatic calibration of the inspected equipment, raw data recording, analysis, management and customized template report export. *(During fully automatic calibration, the equipment under inspection should have communication functions and open communication protocols to enable data reading.)

• Software functions can be customized according to customer needs and software upgrades is supported.

100 mV

0.1 μV

0.003

30 + 5 μV

200

< 0.5

300 mV

0.1 μV

0.002

30 + 10 μV

200

< 0.5

1 V

1 μV

0.001

30 + 20

200

< 0.5

3 V

1 μV

0.001

30 + 20

200

< 0.5

10 V

10 μV

0.001

30 + 20

200

< 0.5

30 V

10 μV

0.001

30 + 20

200

< 0.5

100 V

0.1 mV

0.001

30 + 20

200

< 0.5

300 V

0.1 mV

0.001

30 + 20

60

< 0.5

600 V

0.1 mV

0.001

30 + 20

30

< 0.5

1000 V

1 mV

0.001

30 + 20

15

< 0.5

1500 V [2]

1 mV

0.001

30 + 20

10

< 0.5

Note: [1] RD is the reading value, RG is the range value, the same below. [2]: 1500V range is optional.

10 mA

10 nA

0.002

30 + 20

12

< 0.5

20 mA

10 nA

0.002

30 + 20

12

< 0.5

50 mA

10 nA

0.002

30 + 20

12

< 0.5

100 mA

0.1 μA

0.002

30 + 20

12

< 0.5

200 mA

0.1 μA

0.002

30 + 20

12

< 0.5

500 mA

0.1 μA

0.002

30 + 20

4

< 0.5

1 A

1 μA

0.002

30 + 20

4

< 0.5

2 A

1 μA

0.002

30 + 20

4

< 0.5

5A

1 μA

0.002

30 + 20

4

< 0.5

10 A

10 μA

0.002

30 + 20

4

< 0.5

20 A

10 μA

0.002

30 + 20

4

< 0.5

50 A

10 μA

0.002

30 + 20

4

< 0.5

100 A

0.1 mA

0.002

30 + 20

4

< 0.5

200 A

0.1 mA

0.002

30 + 20

4

< 0.5

500 A

0.1 mA

0.002

30 + 20

4

< 0.5

Note: [3] As the current input of the direct-connected type electric energy meter, electric vehicle charger tester, or the current input of the external shunt of the indirect-connected type DC energy meter.

1 mV

10 nV

0.1 μVrms

120 + 0.3 μV

—

< 0.2

3 mV

10 nV

0.3 μVrms

120 + 1 μV

—

< 0.2

10 mV

0.1 μV

1 μVrms

120 + 3 μV

—

< 0.2

30 mV

0.1 μV

0.002

120 + 80

—

< 0.2

100 mV

1 μV

0.002

120 + 80

—

< 0.2

300 mV

1 μV

0.002

120 + 80

≤ 10

< 0.2

1 V

10 μV

0.002

120 + 80

≤ 10

< 0.2

4 V

10 μV

0.002

120 + 80

≤ 10

< 0.2

Note: [4] When calibrating the indirect-connected electric energy meter separately, it can be used as its current input (corresponding to the shunt voltage)

Measurement Uncertainty

Voltage measurement uncertainty + current measurement uncertainty (or DC small signal voltage measurement uncertainty)

Energy Pulse

Standard Power Pulse Output

The high frequency full scale value corresponds to 60 kHz;

The low frequency full scale value corresponds to 6 Hz;

Pulse Output Frequency

Output frequency jitter time <10 μs

Standard Power Pulse Input

The signal amplitude is 5 V, TTL level;

Can receive high-frequency pulses ≤150 kHz;

FH=60 kHz x Power value ÷ Voltage range value ÷ Current range value

FL=60 kHz x Power value ÷ Voltage range value ÷ Current range value ÷ 10000

Energy Error Display

Automatically displayed with a resolution of 0.0001%

Measuring Range

0.1 Hz～1 MHz

Annual Measurement Uncertainty (k = 2)

2.0 x 10^-7

Standard Second Signal Output

Frequency

Standard second signal

Short-term Stability

2.0 x 10^-10 / h

Annual Measurement Uncertainty

2.0 x 10^-7

Input Level

≤ 5 V

Clock

GPS absolute clock reception function, real-time clock display

Preheat Time

30 mins

Maximum Power Consumption

5.5 kVA

Temperature Performance

Working temperature: 15°C～30°C;

Calibration temperature: 18°C～28°C;

Storage temperature: 0°C～40°C

Humidity Performance

Operating humidity: < 80% @ 30°C, < 70% @ 40°C, < 40% @ 50°C

Storage humidity: (20%～80%) R H, no condensation

Altitude

< 3000 m

Connection

RS232, RS485

Size

2500 mm（W）x 800 mm（D）x 1230 mm（H）

1

Voltage Test Cables/Auxiliary Power Cable

1.5 m / 2.1 mm² / Φ4-Φ4 Plug

Red 6

Black 6

Standard Accessory

2

100A Current Test Cables

1.5 m / 25 mm²; / Φ8-Φ8

U Type Insert pin

Red 1

Black 1

Standard Accessory

3

—

100A Current Test Cables

0.4 m / 25 mm²; / Φ7.2-Φ7.2

Light Rod

2

Standard Accessory

4

100A Current Test Cables

1.5 m / 25 mm²; / Φ4

Insert Pin-MC Quick Plug

Red 1

Black 1

Standard Accessory

3

600A Current Test Cables

1.5 m / 140 mm²; /Φ21-Φ21

Insert Pin

Red 1

Black 1

Standard Accessory

4

20A Current Test Cables

1.5 m / 6 mm² / Φ4-Φ4

Plug

Red 1

Black 1

Standard Accessory

5

Current Shorting Cables

0.18 m / 1.6 mm² / Φ4-Φ4

Plug

Red 2

Black 2

Standard Accessory

6

Alligator Clips

Full Sheath / Φ4 Jack

Red 6

Black 6

Standard Accessory

7

Pin Adapter

Φ2*18 mm / Φ4 Jack

Red 6

Black 6

Standard Accessory

8

U-shaped Insert Pin

Φ8 Thin Insert / Φ4 Jack

Red 6

Black 6

Standard Accessory

9

Small Voltage Meter Test Lead

1.5 m / LEMO-Insert Pin Two Wires

3

Standard Accessory

10

Small Voltage Meter Test Lead

1.5 m / LEMO-Φ4

Gun Plug Two Wires

3

Standard Accessory

11

Small Voltage Test Lead

1.5 m / LEMO-Φ6

Insert Pin Two Wires

1

Standard Accessory

12

Small Voltage Test Lead

1.5 m / LEMO-LEMO Plug

1

Standard Accessory

13

Multifunctional Interface Cable

1.5 m / SD 80-3 sets

Alligator Clips

3

Standard Accessory

14

Frequency Test Cable

1.5 m / BNC Male Head - Alligator Clip Two Wires

3

Standard Accessory

15

Frequency Test Cable

1.5 m / Male Head- BNC Male Head

3

Standard Accessory

16

Power Cable

AC 220V, 10A

1

Standard Accessory

17

Calibration Software

DC Energy Meter Calibration System (USB Disk)

1

Standard Accessory

18

Serial Port Adapter Cable

1.8m / USB to RS232

(DB9 Female Socket)

1

Standard Accessory

19

Glass Fuse

F5A, 250V

3

Standard Accessory

20

—

Packing Box

Wooden

1

Standard Accessory