Current Setup Menu - Arbiter Systems Portable Power Sentinel 933A Operation Manual

3.8 Current Setup
Use Current Setup to adjust the current input sensitivity by a factor of
approximately 20. Adjustable settings are either 1 or 20 Amps for each
channel (A, B, C or N). By switching to 1 Amp, you are increasing the
sensitivity of any one, or all, of the current input channels. Switching
to 20 Amps, removes the current input preamplifier thereby reducing the
1
sensitivity .
Figure 3.10: Current
Setup Menu
Note: Over driving the 933A current input (to greater than 1 Amp) when
configured to the 1 Amp range will not damage the unit, however it will
saturate the input amplifier and may produce unwanted harmonics.
To Setup the Current Range Sensitivity
1. Press the Setup key and choose 6-Current Setup.
2. Press the CHANGE CHANNEL A, CHANNEL B, CHANNEL C
and CHANNEL N soft keys individually to toggle any or all of the
channels to the preferred range – high or low current.
3. Press END MODIFY soft key and SAVE SETTINGS to save the
changes made to Current Module Settings.
4. Press the EXIT soft key to leave this menu without changes.
Low Current Modules – 933A-02, 933A-03. The 933A-02 and 933A-
03 Low Current Modules also include two ranges, and accept input voltages
as well as input currents. This allows them to work with current-output or
voltage-output CTs. For further information on these optional modules,
see Section 3.9.
1
The 1-Amp setting has 1% accuracy compared to 0.05% accuracy for the 20 Amp
setting.
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