KEPCO KIT 219-0532 User Manual

INSTRUCTION MANUAL

KEPCO

An ISO 9001 Company.

ABC

RIPPLE/NOISE

MEASUREMENT

KIT 219-0532

ABC RIPPLE/NOISE MEASUREMENT

KIT 219-0532

1. DESCRIPTION

Kepco Kit 219-0532 provides a low-noise cable and scope probe adapter used to measure ripple and noise, respec­tively, of ABC Series power supplies. The guidelines provided in this instructions sheet supplement the procedures
found in the ABC Service Manual for Ripple Measurement and Noise Measurement. These guidelines help the user to
replicate the methods used by Kepco to measure ripple and noise of ABC power supplies. This procedure should only
be performed after the unit has been fully calibrated and passed all other performance tests specified in the applicable
ABC Service Manual.

2. MATERIAL REQUIRED (SEE TABLE 1.)

TABLE 1. MATERIAL REQUIRED

MATERIAL

• Ripple Measurement Cable 25422 Provided in this Kit 1

• Noise Measurement Scope Probe Adapter 25423 Provided in this Kit 1

• 60MHz Oscilloscope, Tektronix 2215A

• Tektronix Passive Probe Model P6109B (10X
100MHz)

• Instruction Sheet 228-1642 Provided in this Kit 1

1. Kepco strongly recommends using the models specified to ensure measurements are equivalent to those made at the
factory. The user is encouraged to contact Kepco Applications Engineeringfor guidance on the use of equivalents.

1

1

KEPCO

PART NUMBER

n/a Not supplied 1

n/a Not supplied 1

LOCATION QUANTITY

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

http://www.kepcopower.com " email: [e-mail]

©2007, KEPCO, INC 1
Data subject to change without notice 228-1642

3. MEASUREMENT GUIDELINES

1. The ABC Unit Under Test (UUT) must be fully calibrated and have passed all other performance tests as
detailed in the applicable ABC Service Manual.

2. Follow the steps for Noise Measurement contained in the ABC Service Manual except as noted below

a. All connections must be made at the rear panel.

b. Use oscilloscope and probe listed in Table 1. Set oscilloscope bandwidth to 60MHz.

c. When making source and switching frequency ripple measurements, connect the Ripple Measurement

Cable, Kepco Model No. 25422, directly between the oscilloscope and the UUT.

d. When making spike noise measurements, first install Kepco Scope Probe Adapter Model No. 25423

directly to the rear terminals of the UUT, then connect the scope probe to the probe jack on the adapter
having first removed the probe end cap and ground lead (see Figure 6-3 of the ABC Service Manual).

3. Make separate measurements for low frequency (2 x source frequency) ripple, switching frequency ripple and
noise (commutation spikes).

a. Table 2 lists the maximum specified value for A: 2 X Source Frequency Ripple, B: Switching Frequency

Ripple, and C: Spike Noise.

b. Table 2 also lists a corresponding model-specific illustration with oscillosgraphs of the three measurements

that show how the measured values appear on the oscilloscope.

c. Each illustration is accompanied by specific horizontal and vertical settings for the oscilloscope.

TABLE 2. RIPPLE AND NOISE SPECIFICATIONS

Model Measurement

Figure

ABC 10-10 DM See Figure 1. 4 mVp-p max 5 mVp-p max 20 mVp-p max

ABC 15-7 DM See Figure 2. 7 mVp-p max 8 mVp-p max 20 mVp-p max

ABC 25-4 DM See Figure 3. 10 mVp-p max 10 mVp-p max 20 mVp-p max

ABC 36-3 DM See Figure 4. 15 mVp-p max 15 mVp-p max 20 mVp-p max

ABC 60-2DM See Figure 5. 24 mVp-p max 24 mVp-p max 24 mVp-p max

ABC 125-1 DM See Figure 6. 50 mVp-p max 50 mVp-p max 50 mVp-p

2× Source frequency

(See Detail A of

Measurement Figure

Maximum Specification Values

Switching frequency

See Detail B of

Measurement Figure

Spike (50MHz)
See Detail C of

Measurement Figure

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

http://www.kepcopower.com " email: [e-mail]

2 228-1642 082407

A

2 × SOURCE FREQUENCY

RIPPLE: 1.4mVP-P

VERTICAL 2 mV/DIV

HORIZONTAL 5 mS/DIV

B

SWITCHING FREQUENCY

RIPPLE: 1.6mVP-P

VERTICAL 2 mV/DIV

HORIZONTAL 5

µS/DIV

ABC 10-10DM

C

SPIKE NOISE

14mVP-P

VERTICAL 20 mV/DIV
HORIZONTAL 2
(Scope set to 2 mV/DIV)

KEPCO, INC. " 131-38 SANFORD AVENUE " FLUSHING, NY. 11355 U.S.A. " TEL [phone] " FAX [phone]

082407 228-1642 3

µS/DIV

FIGURE 1. ABC 10-10DM MEASUREMENT DATA

http://www.kepcopower.com " email: [e-mail]