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California Instruments 91
User Manual Compact i/iX Series
CAUTION
IN SECTIONS OF THIS
. THIS EQUIPMENT GENERATES
VOLTAGES UP TO 300 VAC AND 500 VDC ARE PRESENT IN
CERTA
POWER SOURCE
POTENTIALLY LETHAL VOLTAGES.
DEATH
AFETY PRECAUTIONS. DO NOT TOUCH ELECTRONIC
ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE
S
CIRCUITS WHEN POWER IS APPLIED.
California Instruments 92
User Manual Compact i/iX Series
6. Calibration
The Routine Calibration should be performed every 12 months. Non-routine Calibration is only
of
6.1 Re
required if a related assembly is replaced or if the periodic calibration is unsuccessful. Calibration
the i/iX system can be performed from the front panel or over the bus. This section covers calibration
from the front panel.
commended 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
of load bank settings are
shown in Table 6-1 and Table 6-2.
6.2 Calibrat ns
current range (80-100 %). Suggested values
ion Scree
The calibration screens for output or measurement calibration can be selected from the MENU screen.
(Press MENU button several times to toggl
To select the CAL ct 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
e to select the CALIBRATION screen.)
IBRATION screen press the ↑ or ↓ key several times to sele
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.
California Instruments 93
User Manual Compact i/iX Series
Note: The Fluke 8506A or 8508 Digital Multi meter (or higher AC accuracy DMM) must be used
for the following calibration. The DMM must be set to the AC HI ACCUR mode for all
AC measurements.
The shunt must be connected in Use a 10
mOhm current shunt of sufficien
To calibrate all measurement fun
voltage must be entered for the corresponding calibrati
mOhm current shunt is used for
The Calibration Load Table show ion
procedure. The current should b ).
series with the load. Connect the load to the output.
t power rating in series with the load to measure the AC load current.
ctions, the desired value for the measurement value of current or
on value. Make the indicated adjustments by
typing in the desired display value. This should be the value indicated by the external DVM. If a 10
current, 100 mV represents 10 amps.
s required load bank settings for the current measurement calibrat
e calibrated in the lowest voltage range only. (Highest current range
PARAMETER
Model ---> 751i/iX 1501i/iX
Max current, 115 V, Low 17.6 Ω 8.8 Ω
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