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Product Overview
TD1545 is a multi-function instrument dedicated to the verification or calibration of DC electrical instruments. It is composed of DC voltage standard source, DC current standard source, DC small signal voltage source, DC measurement unit and so on. It has two specifications of 0.02/0.05. The instrument can not only verify conventional DC measuring instruments such as DC voltmeter / ammeter / power meter, but also verify DC shunt, direct access DC watt-hour meter and indirect access DC watt-hour meter.
Reference standard: GB/T 33708-2017《 static DC watt-hour meter, JJG 842-2017《 electronic DC watt-hour meter verification regulation (Tianheng measurement and control participate in drafting), suitable for all levels of measurement departments, manufacturers, DC watt-hour meter users as DC power / electric energy detection standards.
Main Application (0.02 class)
Verification or calibration of DC voltmeters and ammeters of class 0.05 and below
Verification or calibration of DC power meters of Class 0.1 and below
Verification of direct access DC watt-hour meters of Class 0.1 and below
Verification of a DC watt-hour meter connected to a shunt of Class 0.1 and below
Verification or calibration of DC shunt of Class 0.1 or less
Verification or calibration of 0.1 and below DC transmitters (selectors)
Functional Characteristics
DC voltage output: up to 1150 V, meet the requirements of 1 kV watt-hour meter 1.15 Un voltage test.
DC current output: up to 600 A, can be used as the current input of direct access DC watt-hour meter, or the current input of indirect access DC watt-hour meter with shunt.
DC small signal voltage output / measurement: up to ±4.4 V, output as indirect access DC watt-hour meter current input (corresponding to shunt voltage). The measuring end can be used to measure the secondary voltage of the shunt to detect its error.
The four-wire Kelvin connection between the low potential terminal and the wire can minimize the influence of thermoelectric potential or contact potential on electric energy measurement.
Value output mode: with standard source and output source two modes, convenient digital meter and pointer analog meter verification.
Value adjustment mode: with "fixed-point output, rotary encoder, step ratio" and other ways.
Data analysis function: electricity stability test, trend change curve, statistical analysis, etc.
Human-machine operation function: with large size LCD screen, visual display, touch + digital button convenient operation mode.
DC small signal measurement (optional): used to measure the secondary DC signal of the transmitter to detect its error.
Special software (options): support semi-automatic or automatic verification, data management and certificate export.
4. technical specifications
4.1 DC voltage output DCV
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2) (ppm*RD +ppm*RG)1 | Maximum load current (mA) | ripple Coefficient ( % ) | ||
0.05 level | 0.02 | 0.05 level | 0.02 | ||||
100 m V | 0.1μV | 0.005 | 0.002 | 120 + 80 | 60+5μV | 200 | < 1.0 |
300 m V | 0.1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
1V | 1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
3V | 1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
10V | 10μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
30V | 10μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
100V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
300V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 60 | < 1.0 |
600V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 30 | < 1.0 |
1000V | 1mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 15 | < 1.0 |
Note :1 RD read value, RG range value | |||||||
Output range :10 mV ~1150 V,7 display
Protection function: short circuit protection, overload protection
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2) (ppm*RD +ppm*RG)3 | Maximum load voltage (V) | ripple (%) coefficient | ||
0.05 level | 0.02 | 0.05 level | 0.02 | ||||
10m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
20m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
50 m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
100 m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
200m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
500m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
1A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
2A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
5A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
10A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
20A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
50A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
100A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
200A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
500A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
Note :2 as current input of direct access DC watt-hour meter or current input of external shunt of indirect access DC watt-hour meter RD read value RG range value | |||||||
Output range :1 mA ~600 A,7 bit display
Protection function: short circuit protection, overload protection
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2)(ppm*RD +ppm*RG )5 | Maximum load Current (mA) | (%) of ripple coefficients |
m V 1 | 10nV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
3 m V 3 | 10nV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
m V 10 | 0.1μV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
30 m V | 0.1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
100 m V | 1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
300 m V | 1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
1V | 10μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
4V | 10μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
Note :4 When verifying an indirect access watt-hour meter separately, it can be used as its current input When the DC shunt is directly calibrated, it can be used to measure the secondary voltage of the shunt. | |||||
Output range :±(10μV ~4.4 V ),6-bit display
The shunt specification and current-voltage ratio can be set, and the output value can be displayed according to the current converted by the voltage or shunt.
Protection function: short circuit protection, overload protection
4.4 DC Power Indicator data
Annual measurement uncertainty of DC power (0.05 level device):0.05%* RD
Annual measurement uncertainty for DC power (0.02 stage):0.02%* RD
Standard power pulse output (high frequency): full range value corresponds to 60 kHz
Standard power pulse output (low frequency): full range value corresponds to 6 Hz
Pulse output frequency jitter :<10μs
Standard power pulse input: can receive ≤200 kHz high frequency pulse, input level ≤5 V
Automatic display of power error with resolution of 0.0001 per cent
Voltage/current range | Scope of measurement | Best measure uncertainty (k=2) (ppm*RD +ppm*RG )6 |
1V | ±(0~1.2) V | 60 + 40 |
10V | ±(0~12) V | 60 + 40 |
2mA | ±(0~2.4) mA | 60 + 40 |
20mA | ±(0~24) mA | 60 + 40 |
Note 5: this function is used to measure the secondary DC signal of the transmitter; Note 6: RD is read value, RG is range value | ||
Power supply: AC (220±22) V, (50±10) Hz（ Customize according to the situation）
Working environment :15℃~30℃,40~75 per cent
Storage environment :-20℃~70℃,<95% not exposed
Size :625 mm (W)×590 mm (D)×260mm(H)
Equipment weight: approximately 53 kg
Communication interface: RS232 interface USB interface, RJ45 interface
Product Overview
TD1545 is a multi-function instrument dedicated to the verification or calibration of DC electrical instruments. It is composed of DC voltage standard source, DC current standard source, DC small signal voltage source, DC measurement unit and so on. It has two specifications of 0.02/0.05. The instrument can not only verify conventional DC measuring instruments such as DC voltmeter / ammeter / power meter, but also verify DC shunt, direct access DC watt-hour meter and indirect access DC watt-hour meter.
Reference standard: GB/T 33708-2017《 static DC watt-hour meter, JJG 842-2017《 electronic DC watt-hour meter verification regulation (Tianheng measurement and control participate in drafting), suitable for all levels of measurement departments, manufacturers, DC watt-hour meter users as DC power / electric energy detection standards.
Main Application (0.02 class)
Verification or calibration of DC voltmeters and ammeters of class 0.05 and below
Verification or calibration of DC power meters of Class 0.1 and below
Verification of direct access DC watt-hour meters of Class 0.1 and below
Verification of a DC watt-hour meter connected to a shunt of Class 0.1 and below
Verification or calibration of DC shunt of Class 0.1 or less
Verification or calibration of 0.1 and below DC transmitters (selectors)
Functional Characteristics
DC voltage output: up to 1150 V, meet the requirements of 1 kV watt-hour meter 1.15 Un voltage test.
DC current output: up to 600 A, can be used as the current input of direct access DC watt-hour meter, or the current input of indirect access DC watt-hour meter with shunt.
DC small signal voltage output / measurement: up to ±4.4 V, output as indirect access DC watt-hour meter current input (corresponding to shunt voltage). The measuring end can be used to measure the secondary voltage of the shunt to detect its error.
The four-wire Kelvin connection between the low potential terminal and the wire can minimize the influence of thermoelectric potential or contact potential on electric energy measurement.
Value output mode: with standard source and output source two modes, convenient digital meter and pointer analog meter verification.
Value adjustment mode: with "fixed-point output, rotary encoder, step ratio" and other ways.
Data analysis function: electricity stability test, trend change curve, statistical analysis, etc.
Human-machine operation function: with large size LCD screen, visual display, touch + digital button convenient operation mode.
DC small signal measurement (optional): used to measure the secondary DC signal of the transmitter to detect its error.
Special software (options): support semi-automatic or automatic verification, data management and certificate export.
4. technical specifications
4.1 DC voltage output DCV
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2) (ppm*RD +ppm*RG)1 | Maximum load current (mA) | ripple Coefficient ( % ) | ||
0.05 level | 0.02 | 0.05 level | 0.02 | ||||
100 m V | 0.1μV | 0.005 | 0.002 | 120 + 80 | 60+5μV | 200 | < 1.0 |
300 m V | 0.1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
1V | 1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
3V | 1μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
10V | 10μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
30V | 10μV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
100V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 200 | < 1.0 |
300V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 60 | < 1.0 |
600V | 0.1 mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 30 | < 1.0 |
1000V | 1mV | 0.005 | 0.002 | 120 + 80 | 60 + 40 | 15 | < 1.0 |
Note :1 RD read value, RG range value | |||||||
Output range :10 mV ~1150 V,7 display
Protection function: short circuit protection, overload protection
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2) (ppm*RD +ppm*RG)3 | Maximum load voltage (V) | ripple (%) coefficient | ||
0.05 level | 0.02 | 0.05 level | 0.02 | ||||
10m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
20m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
50 m A | 10nA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
100 m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
200m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 12 | < 0.5 |
500m A | 0.1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
1A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
2A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
5A | 1μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
10A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
20A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 0.5 |
50A | 10μA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
100A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
200A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
500A | 0.1 mA | 0.005 | 0.003 | 120 + 80 | 60 + 40 | 3 | < 1.0 |
Note :2 as current input of direct access DC watt-hour meter or current input of external shunt of indirect access DC watt-hour meter RD read value RG range value | |||||||
Output range :1 mA ~600 A,7 bit display
Protection function: short circuit protection, overload protection
Range | Resolution | Short-term stability (%/ min) | Measurement uncertainty (k=2)(ppm*RD +ppm*RG )5 | Maximum load Current (mA) | (%) of ripple coefficients |
m V 1 | 10nV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
3 m V 3 | 10nV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
m V 10 | 0.1μV | 1μV rms | 120+2μV | ≤ 10 | < 0.5 |
30 m V | 0.1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
100 m V | 1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
300 m V | 1μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
1V | 10μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
4V | 10μV | 0.005 | 120 + 80 | ≤ 10 | < 0.5 |
Note :4 When verifying an indirect access watt-hour meter separately, it can be used as its current input When the DC shunt is directly calibrated, it can be used to measure the secondary voltage of the shunt. | |||||
Output range :±(10μV ~4.4 V ),6-bit display
The shunt specification and current-voltage ratio can be set, and the output value can be displayed according to the current converted by the voltage or shunt.
Protection function: short circuit protection, overload protection
4.4 DC Power Indicator data
Annual measurement uncertainty of DC power (0.05 level device):0.05%* RD
Annual measurement uncertainty for DC power (0.02 stage):0.02%* RD
Standard power pulse output (high frequency): full range value corresponds to 60 kHz
Standard power pulse output (low frequency): full range value corresponds to 6 Hz
Pulse output frequency jitter :<10μs
Standard power pulse input: can receive ≤200 kHz high frequency pulse, input level ≤5 V
Automatic display of power error with resolution of 0.0001 per cent
Voltage/current range | Scope of measurement | Best measure uncertainty (k=2) (ppm*RD +ppm*RG )6 |
1V | ±(0~1.2) V | 60 + 40 |
10V | ±(0~12) V | 60 + 40 |
2mA | ±(0~2.4) mA | 60 + 40 |
20mA | ±(0~24) mA | 60 + 40 |
Note 5: this function is used to measure the secondary DC signal of the transmitter; Note 6: RD is read value, RG is range value | ||
Power supply: AC (220±22) V, (50±10) Hz（ Customize according to the situation）
Working environment :15℃~30℃,40~75 per cent
Storage environment :-20℃~70℃,<95% not exposed
Size :625 mm (W)×590 mm (D)×260mm(H)
Equipment weight: approximately 53 kg
Communication interface: RS232 interface USB interface, RJ45 interface
