TM7900 Precision Volt-second Generator for Flux Meter Calibration

Name: TM7900 Precision Volt-second Generator for Flux Meter Calibration
Brand: TUNKIA
Rating: 5.0 (36 reviews)

Tunkia TM7900 Precision Volt-second Generator For Flux Meter Calibration

1. Summary

TM7900 is a high-precision Calibrator for Flux Meter , which generates magnetic flux by a built-in high-precision Volt-second Generator (1Vs=1Wb). It calibrates flux-meters by comparing indicating value of the flux-meter with the value it generates. Compared with Mutual Inductance method, Volt-second method is featured with easier to use, better precision and traceability, it is applied for calibrate digital flux-meter and electrical integrator.

2. Features

• Accuracy: 0.005%, 0.01%, 0.02% or 0.05%.

• Built-in high-precision voltage source and timer.

• Generate magnetic flux by integrating voltage and time.

• Calculate and output voltage and time by setting magnetic flux value.

• Quick calibration in several seconds.

• Unit switch: mWb, Wb, Vs, mVs, Mx.

• Support setting interior resistance and wire resistance.

• Eliminate interior resistance’s influence by compensation.

• Large LCD screen and press-key.

3. Application

☆ Fast Calibration of Digital Fluxmeter

Tunkia TM7900 Precision Volt-second Generator For Flux Meter Calibration

The user sets the target standard flux value, and the system automatically configures the corresponding voltage and time parameters.
Fast calibration speed — the entire process takes only a few seconds.
Compared to the mutual inductance method, it offers easier operation, higher accuracy, and better traceability.

4. Appearance

☆ Front Panel

S/N	Description
	LCD touch screen for intuitive display and easy operation.
	Keypad for easy input and function selection, improving usability.
	Built-in handle for easy carrying of the instrument.
	Foldable feet for easy reading.

☆ Rear Panel

S/N	Description
	Magnetic flux output interface: can output standard magnetic flux.
	RS232: can be connected to a computer via an RS232 data cable.
	Power interface: AC 220V power input interface with switch and fuse.
	Chassis ground: before using the device, make sure that the chassis ground is reliably grounded.

5. Specifications

5.1 DCV Output

Range	Measurement Uncertainty (k=2)，ppmRD+ppmRG
Range	Class 0.05	Class 0.02	Class 0.01	Class 0.005
2 mV	200 + 200	100 + 100	50 + 100	20 + 100
20 mV	200 + 200	100 + 50	50 + 30	20 + 10
200 mV	200 + 200	100 + 50	50 + 30	20 + 10
2V	200 + 200	100 + 50	50 + 30	20 + 10
Note: ① RD is the reading value, ② RG is the range value

• Adjustment fineness: 0.005*RG, 0.001%*RG (class 0.005).

• Protective function: Short-circuit protection, Overload protection.

5.2 Adjustable Timer

Time Output	Measurement Uncertainty (k=2), μs
Time Output	Class 0.05	Class 0.02	Class 0.01	Class 0.005
0.1 s	1	1	0.5	0.5
0.5 s	1	1	0.5	0.5
1 s	1	1	0.5	0.5
5 s	1	1	0.5	0.5

• Pulse width output range: 0.1s ~ 5s

5.3 Standard Flux Output

Range	Measurement Uncertainty (k=2), ppm*RD + μWb
Range	Class 0.05	Class 0.02	Class 0.01	Class 0.005
Combination of voltage and time	500 + 0.1	200 + 0.1	100 + 0.1	50 + 0.1

• Flux output range: 0.1mWb ~10Wb, 7-dights display.

6. General Specifications

Power Supply	AC (220±22) V，(50±2) Hz
Temperature Performance	Operating temperature: 0℃~50℃； Storage temperature: -20°C～70°C
Humidity Performance	Operating humidity: 40%～80% R·H, no condensation Storage humidity: < 95% R·H, no condensation
Weight	About 4 kg
Communication Interface	RS232 interface
Dimensions	180mm(width) × 270mm (depth) × 230mm (height)
Dimensions

7. Ordering Information

Tunkia TM7900 Precision Volt-second Generator For Flux Meter Calibration

8. Accessory List

No.	Pic	Name	Specification	Qty	Remark
1		Low potential test lead	1m, silver-plated wire, straight-plug lantern head, red and black twisted pair	1	Standard Accessory
2		Power cord	AC 220V, 10A	1	Standard Accessory
3		Glass fuse	1A 250V slow blow	4	Standard Accessory
4		Packing box	Paper package	1	Standard Accessory

TM7900 Percision Volt-second Generator for Flux Meter Calibration

TM7900 Precision Volt-second Generator for Flux Meter Calibration

TM7900 Precision Volt-second Generator for Flux Meter Calibration

TM7900 Precision Volt-second Generator for Flux Meter Calibration

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