KEISOKU GIKEN Digital Ripple & Noise Meter | Denkei Corporation Americas

Digital Ripple & Noise Meter

It is mandatory to conduct periodic maintenance of the power supplies in industrial equipment used in
power plant or other public services.

As power supply is the key devise in the system and their system will shut off when power supply failed and will cause serious damage to our life. Normally ripple voltage and noise voltage of the power supply are measured in the periodic check but those are not that straightforward.

Since the measuring object is “NOISE” , reading waveforms on the oscilloscope is very complicated and good experience is needed. However digital ripple & noise meter can discriminate them and read them accurately.

Model:

RM-104

Maker:

KEISOKU GIKEN Co., Ltd.

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What is ripple noise meter?

A ripple noise meter is used to measure the ripple voltage appearing on the DC output of switching power supplies. It is commonly used for shipping inspections of switching power supplies embedded in various electronic devices. Since the output of switching power supplies includes not only ripple voltage but also various noise components, measuring it is not straightforward. Although it is possible to measure with a general oscilloscope, the operation is not simple, and reading ripple voltage from complex waveforms can lead to “individual reading differences.” Additionally, oscilloscopes are not well-suited for automation.

In such cases, using a ripple noise meter allows for simple operation without individual reading differences, enabling standardized work and quantitative measurement, which makes automation easier. Furthermore, in recent years, maintenance of industrial equipment at power plants and other facilities has become indispensable, as a power supply failure can halt all functions. Regularly measuring ripple voltage can help estimate the deterioration of smoothing capacitors, providing a guideline for replacement timing. The importance of maintaining the power supply, the heart of the system, cannot be overstated.

RM-104 measures 5 types of voltage easily

The DC output of switching power supplies contains not only the DC component but also noise and ripple generated by the switching circuit, along with ripple from commercial frequency components (50/60Hz), resulting in a complex waveform. By using the RM-104, you can easily measure five types of voltage from such ripple noise waveforms.

A: Ripple & noise voltage
B: Ripple voltage
C: Noise voltage
D: Switching ripple voltage
E: AC ripple voltage

Features

• Automated measurements that correlate with oscilloscope readings.
• Effortless one-touch measurements facilitated by digital technology.
• Automated judgment of ‘PASS’ or ‘FAIL’ statuses.
• In accordance with JEITA measurement standards.

Specification

1. DC Volt. Measurement
Range		±6.0000 V	±60.000 V	±500.00 V
Resolution		0.1 mV	1.0 mV	10.0 mV
Measurement Time		-6.0000 V ～ 6.0000 V	-60.000 V ～ -5.600 V 5.600 V ～ 60.000 V	-500.00 V ～ -56.00 V 56.00 V ～ 500.00 V
Accuracy *5		±0.025 % of rdg. ±0.025 % of f.s.
Max. Applied Volt.		±500 V
Measurement Time *4		less than 90ms (Fast Mode) / less than 250ms (Slow Mode)
2. Ripple & Noise Measurement
Ranges		300.0 mVp-p	3000 mVp-p
Resolution		0.1 mV	1.0 mV
Accuracy 1, 2, *5		±2 % of rdg. ±1 % of f.s.
Filter	THRU	50 Hz～100 MHz
	LPF	50 Hz～2 kHz
	HPF	2 kHz～100 MHz
	20 MHz bandwidth limitation	50 Hz ～ 20 MHz
Ripple Ratio *3		0.0 % ～ 50.0 % (0.5 % increment)	0.0 % ～ 50.0 % (0.5 % increment)
Measurement Time 3, 4		Approx. 170 ms	Approx. 170 ms
3. Interface
GP-IB		Compliant with IEEE488.1
LAN *6		IEEE 802.3
USB		USB2.0 compliant (Full-Speed)
OUT PORT: PASS, FAIL		Photocoupler output 24V common (14-pin connector) *8
OUT PORT: start trigger		Photo-coupler input 12V common (14-pin connector) *7
OUT PORT: 4 CH output		Photo-coupler output 24V (for SC-83 control) *8
4. Input terminals, cables
Impedance		DC 1 MΩ, high frequency 50 Ω
Cable		DP-100 or 50 Ω coaxial cable, 1.5 m
5. General
Power supply		AC85 ～ 264V, 50/60Hz (47 ～ 63)
Power consumption		30VA or less
Dimensions *9		180(W) x 85(H) x 300(D) mm
Weight		Approx. 1.8kg
Withstand voltage		Input to output 3000V AC for 1 minute / Input to FG 1500V AC for 1 minute
Insulation resistance		Between input and FG DC500V 30MΩ min.
Operating temperature/humidity range		0℃ ～ 40℃ 20% ～ 85%RH or less (No condensation)
Storage temperature/humidity range		-20℃ ～ 60℃ 20% ～ 85%RH or less (No condensation)
advanced		Less than 2000m

*1: Effective when Ripple Ratio is set between 0% and 10%.
*2: Effective when the Frequency Range is between 10kHz and 10MHz.
*3: Operates when the Frequency Range is between 10kHz and 100MHz.
*4： Measurement Time in the same Measurement Range.
*5：Guaranteed for 6 months when Operational Temp. is 23+-5degree C and Humidity is less than 70degree C.
*6: Factory option.
*7: Photocoupler Input rating: 12V 12mA (input resistance 1KΩ)
*8: Photocoupler Output rating: 24V 10mA MAX
*9: External dimensions do not include interface protrusions.
・The calibration year and month are displayed on the screen at startup.
・Compatible with previous model RM-103.

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