Sets or returns the ACW reference value in uA or 
mA. The test must first be in ACW mode before 
this command can be used. 
The ACW reference value shares the identical limit 
of HI SET value, which is 42mA at the maximum. 
For instance, when HI SET value is set 10mA, the 
reference value can therefore be set up to 32mA. 
Note: An “Err” message will be shown on display 
if the Ramp Time + Test Time is > 240 seconds 
when the HI SET limit + REF is ≥ 30mA for GPT-
12XXX or HI SET limit + REF is ≥ 80mA for GPT-
15XXX. This applies to the ACW function only. An 
“TIME OVER 240s” message will be returned after 
using the query command “SYSTem:ERRor ?” in 
remote control. 
Sets or returns the ACW percentage of initial 
voltage. The test must first be in ACW mode 
before this command can be used.