AMETEK SLH Series RevB - Manual (Page 33)

SLH-Series AC High Power Electronic Load Operation
M540073-01 Rev C 3-7
Crest Factor
The SLH-Series AC electronic load module provides 11 built-in sets totaling 55
waveforms. 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). Selection of crest
factor is 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.
• Press FREQ key (15). The associated LED will light. The first selection is for
frequency, as described in the section, “Frequency Setting” above.
• Verify that the frequency does not read “dc”. If it does, use the
↑↓ keys to
adjust the frequency from “dc”.
• Press the “FREQ” key until “bAn” appears on the upper DM.
• Use the ↑↓ keys to select the desired bank.
• Press the “FREQ” key two times to exit setting mode.
• Press the appropriate √2, 2.0, 2.5, 3.0 and 3.5 keys to select the desired crest
factor. The associated LED will light.
Display Setting
In normal operation, the DMs display RMS voltage and RMS current. To display power
in Watts (upper DM) and VA (lower DM), press the “WATT” key until the associated LED
(W or VA) is lit.
Press the “WATT” key again to return to normal display mode.