AMETEK SLH Series RevB - Manual (Page 28)

Operation SLH-Series AC High Power Electronic Load
3-2 M540073-01 Rev C
1 Model Label
Shows load model series and its voltage, current and power specifications.
2 NG LED
• When lit, indicates “No Go” (fail) when Vmeter, Ameter, Wattmeter or VA meter
exceeds the upper or lower limit set.
• When not lit, indicates “Go” (no fail).
3 MODE key and CC, CR LEDs
The MODE key toggles between Constant Current (CC LED on) or Constant Resistance
(CR LED on) operating modes.
4 REM LED
Indicates remote operation:
• When lit, the unit is under remote control and cannot be operated through the front panel
keys. (Remote controller releases control by GPIB command).
• When not lit, the unit is under local control and can be manually operated using the front
panel keys.
5 Upper Digital Meter (DM)
Multi-purpose display, depending on selected mode:
• Under general conditions, functions as a 4 ½ digital voltmeter to display the voltage at
the load input end or Vsense BNC input end.
• During WATT ON condition, functions as a wattmeter to display the power of the load.
• Under LIMIT ON condition, displays the upper limit of:
o Voltmeter with the unit as “Vrms”.
o Ammeter with the unit as “Arms”.
o Wattmeter with the unit as “W”.
o VA meter with the unit as “VA”.
• During protection condition, displays “oVP” for over-voltage.
• During FREQ ON (see 15) condition, displays:
o “FrEq” (frequency),
o “bAn” (bank), or
o “Sync” (Sync)
6 Lower Digital Meter (DM)
• Under general conditions, functions as a 4 ½ digital ammeter to display the load current
actually flowing into the electronic load.
• In Preset ON (see 7) mode, displays the set value whether by front panel manual
operation or by remote control.
• In CC Mode (see 3), displays the set value of CC Level A and B in “Arms”.
• In CR Mode (see 3), displays the set value of CR Level A and B in “Ω”.
• During protection condition, displays:
o “oCP” for over-current,
o “oPP” for over-power, or
o “oTP” for over-temperature
• During LIMIT ON condition (see 11), displays the lower limit of:
o Voltmeter with the unit as “Vrms”.
o Ammeter with the unit as “Arms”.
o Wattmeter with the unit as “W”.
o VA meter with the unit as “VA”.