User Manual AMETEK Programmable Power
RS Series 145
Connect the load to the output. Use the 1 mOhm current shunt in series with the load to
measure the AC and DC load current. When programming a DC load always program the
output voltage to 0 volts before changing the output load. This will prevent load switch contacts
from being damaged.
To calibrate all measurement functions, the desired value for the measurement value of current
or voltage must be entered for the corresponding calibration value. Make the indicated
adjustments by typing in the desired display value. This should be the value indicated by the
external DVM. If a 1 mOhm current shunt is used for current, 300 mV represents 300 amps.
The Calibration Load Table shows required load bank settings for the current measurement
calibration procedure. The following text is a detailed explanation of the procedure.
Note that the voltage measurement calibration is only required on the high voltage range. The
same voltage measurement calibration coefficients are used on both voltage ranges.
Note that the current measurement calibration is only required on the low voltage range –
maximum available current range. The same current measurement calibration coefficients are
used on both voltage ranges (if available). Suggested load values are shown for either voltage
range in case the RS is only used in a single voltage range.
AC Current Full Scale
0.5 Ω, 30KW 0.25 Ω, 60KW 0.16 Ω, 90KW
DC Current Full Scale
1.33 Ω, 20KW 0.64Ω, 40KW 0.43 Ω, 60KW
AC Current Full Scale
2.0 Ω, 30KW 1.0 Ω, 60KW 0.65 Ω, 90KW
DC Current Full Scale
5.2 Ω, 20KW 2.6 Ω, 40KW 1.8 Ω, 60KW
AC Current Full Scale
0.12 Ω, 120KW 0.1 Ω, 150KW 0.08 Ω, 180KW
DC Current Full Scale
0.33 Ω, 80KW 0.26 Ω, 100KW 0.22 Ω, 120KW
AC Current Full Scale
0.5 Ω, 120KW 0.4 Ω, 150KW 0.33 Ω, 180KW
DC Current Full Scale
1.3 Ω, 80KW 1.1 Ω, 100KW 0.9 Ω, 120KW
Table 6-1: Calibration Load Values
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