AMETEK Compact i/iX Series - Manual (Page 96)

User Manual Compact i/iX Series
AMETEK Programmable Power California Instruments 96
6. Calibration
The Routine Calibration should be performed every 12 months. Non-routine Calibration is only
required if a related assembly is replaced or if the periodic calibration is unsuccessful. Calibration of
the i/iX system can be performed from the front panel or over the bus. This section covers calibration
from the front panel.
6.1 Recommended Calibration Equipment
Digital Multimeter: Fluke 8506A, 8508 or equivalent.
10 mOhm Current Shunt: Isotek Model RUG-Z-R010-0.1.calibrated to 0.1%.
Load Bank: Various power load resistors or a resistive load bank will be needed.
Size of the load bank depends on model. A load is required to
perform the current measurement calibration near full scale. Current
measurement calibration should be done on the lowest available
voltage range.
The accuracy and value of the load resistor is not critical as long as
the current drawn is sufficient to operate the AC Source in the upper
current range (80-100 %). Suggested values of load bank settings are
shown in Table 6-1 and Table 6-2.
6.2 Calibration Screens
The calibration screens for output or measurement calibration can be selected from the MENU screen.
(Press MENU button several times to toggle to select the CALIBRATION screen.)
To select the CALIBRATION screen press the

or

key several times to select PASSWORD. Then
press the ENTER key. This will bring up the PASSWORD screen. To prevent unauthorized access to
calibration data, a password must be entered to access any calibration screen. The calibration
password is an numeric value equal to the high voltage range limit, typically 300. Check the serial tag
label or the LIMIT screen when in doubt.
The password can be entered using the shuttle or the keypad. Once the correct value is set, press the
ENTER key. Once set, the calibration screens remain accessible until the power source is powered
down. If you leave the calibration screen and return, toggle the value up or down and back, followed by
the ENTER key to re-engage the calibration mode.
To select the MEASUREMENT CALIBRATION screen, follow the same steps as outlined above but
select the MEASUREMENT CAL entry instead of OUTPUT CAL. If another CALIBRATION screen has
been accessed since power-up, no password is needed. Otherwise, enter the same password as
indicated above.
6.3 Measurement Calibration
The i/iX Series controller measures voltage and current by digitizing both voltage and current
waveforms on each available output phase. This data is subsequently processed and used to calculate
all measurement parameters such as VRMS, IRMS, Power, VA, and Frequency etc. To calibrate all
measurements, only the voltage and current measurement need to be calibrated specifically. All other
measurements are derived from these.
Connect the test equipment to the power source. If the power system is a master/auxiliary multi-box
system with one controller, the DVM for calibrating the measurement voltage should always be
connected to the Remote Sense connector on the Master cabinet.