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AMETEK SLM Series Rev B User Manual

Page 33

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SLM-Series AC/DC Electronic Load

Operation

M540072-01 Rev B

3-7

Zero Crossing

SYNC

Input

SYNC "OFF"

+5V

330Ω

SYNC

EXT+

EXT-

SYNC "ON"

Figure 3-3 Illustration of Sync

3.2.4 Crest

Factor

The SLM-Series AC/DC electronic load module provides 11 built-in sets totaling 55
waveforms.

• Select the waveforms from the memory banks. The waveforms are stored in

memory banks (0-10) with 5 selections per bank as shown in Table 3-1. (See
Appendix for waveform details).

• Select the crest factor through the √2, 2.0, 2.5, 3.0 and 3.5 keys in addition

to the bank selection.

BANK

√2

2.0

2.5

3.0

3.5

Sine Wave

0

√2 2.0 2.5 3.0 3.5

1

1.5 1.6 1.7 1.8 1.9

2

2.0 2.1 2.2 2.3 2.4

3

2.5 2.6 2.7 2.8 2.9

4

3.0 3.1 3.2 3.3 3.4

Square Wave

5

1.0 1.1 1.2 1.3 1.4

6

1.5 1.6 1.7 1.8 1.9

7

2.0 2.1 2.2 2.3 2.4

8

2.5 2.6 2.7 2.8 2.9

9

3.0 3.1 3.2 3.3 3.4

DC

10

√2dc 2dc 2.5dc 3.0dc 3.5dc

Table 3-1 Built in Crest Factor Settings by Bank andKkey Selection

• When Frequency is set to DC (see Frequency Setting above), the waveform

information shall be fixed at DC level and the “bAn” bank selection will not
appear in the FREQ key menu.


1. Press FREQ key (15). The associated LED will light. The first selection is for

frequency, as described in the section, “Frequency Setting” above.

2. Verify that the frequency does not read “dc”. If it does, use the

↑↓ keys to

adjust the frequency from “dc”.

3. Press the “FREQ” key until “bAn” appears on the upper DM.
4. Use the 

↑↓ keys to select the desired bank.