Fluke 5790B - Power-Up State; Warmup Requirements

5790B
Operators Manual
4-2
Power-Up State
After passing power-up self tests and any time
 is pushed, the Product goes
into the power-up state. The only power-up setting that is non-volatile (saved
when the power is turned off) is the Initial Input setting. When you turn on the
power or push
 (with no stimulus attached), the Product auto ranges down to
one of the lowest ranges.
At any time during front panel operation, you can return the Product to the power-
up state by pushing
. Table 4-1 summarizes the power-up state settings.
Most instrument parameters that you can set are saved in memory until you clear
non-volatile memory with a restore to factory default operation. Table 4-2
summarizes the non-volatile setup parameters and their factory defaults.
Warmup Requirements
Make sure the Product is warmed up before use. After initial turn-on, warm up
the Product for 30 minutes to allow the environmentally-controlled components
inside to stabilize. You can use the Product right away, but a 30-minute warm-up
period is required to ensure that the Product meets or exceeds the specifications
listed in Chapter 1.
If you turn off the Product after it has warmed up, allow it to warm up again for at
least twice the length of time it was turned off (up to a maximum of 30 minutes of
warm up). For example, if the Product is turned off for 10 minutes, allow it to
warm up again for at least 20 minutes.
Table 4-1. Power-Up State Defaults and Volatility
Operating State
Factory Default
(Setting after Non-Volatile Memory Restore)
Volatile?
(Reset at Power Up)
Range 1 kV Yes
Auto/Lock Range AUTO Yes
EX TRIG OFF (continuous trigger) Yes
EX GRD OFF (internal) Yes
Digital Filter Mode OFF Yes
Digital Filter Restart
Threshold
MEDIUM Yes
Initial Input INPUT 2 No
Hi Res OFF Yes
Reference None Yes
Reference Delta
Units
PPM Yes