SECTION 3
INSTALLATION
22
3.4.2 CONFIGURE AMPS TO VOLTS RATIO
NOTE:
Configuration is preset at the factory if the UPC is packaged with a power source.
The ammeter scale is selected by the AMPS TO VOLTS RATIO SWITCH multiplied by a factor of 10. The
AMPS TO VOLTS RATIO scales the voltage fed into the ammeter circuit input to represent a given amount
of current. This switch may be set from 1 to 15, 10-150 or 100-500.
For example, when the amps to volts ratio is 5:
5 A (load current) = 1 V (input to ammeter circuit) = 5 A displayed.
In this case, the ammeter full range is 50 A (5 x 10).
Set the AMPS TO VOLTS RATIO of the UPC to match the Power Source. Refer to the Power Source
Manual to determine the AMPS TO VOLTS RATIO of the Power Source model. The ratio is set by the
AMPS TO VOLTS RATIO SWITCH on the UPC METERING PCB (
). The 4 LSB's of the Dip-
switch are binary weighted. See (
) for information on configuration switch S2-7. Shown below are
sample settings. Note that not all allowable values are shown:
DIP-SWITCH SETTING
S2-6
S2-5
S2-4
S2-3
S2-2
S2-1
WEIGHT:
X100
X10
8
4
2
1
A:V RATIO
N/A (DO NOT USE)
OFF
OFF
OFF
OFF
OFF
OFF
1
OFF
OFF
OFF
OFF
OFF
ON
2
OFF
OFF
OFF
OFF
ON
OFF
3
OFF
OFF
OFF
OFF
ON
ON
4
OFF
OFF
OFF
ON
OFF
OFF
5
OFF
OFF
OFF
ON
OFF
ON
6
OFF
OFF
OFF
ON
ON
OFF
7
OFF
OFF
OFF
ON
ON
ON
8
OFF
OFF
ON
OFF
OFF
OFF
9
OFF
OFF
ON
OFF
OFF
ON
10
OFF
OFF
ON
OFF
ON
OFF
11
OFF
OFF
ON
OFF
ON
ON
12
OFF
OFF
ON
ON
OFF
OFF
13
OFF
OFF
ON
ON
OFF
ON
14
OFF
OFF
ON
ON
ON
OFF
15
OFF
OFF
ON
ON
ON
ON
20
OFF
ON
OFF
OFF
ON
OFF
50
OFF
ON
OFF
ON
OFF
ON
100
ON
OFF
OFF
OFF
OFF
ON
200
ON
OFF
OFF
OFF
ON
OFF
400
ON
OFF
OFF
ON
OFF
OFF
NOTE:
S2-
7 MUST be set “ON” if the attached power source has only 2 power amplifiers.
