IET Labs PRS-370 SERIES, Руководство по эксплуатации

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MAINTENANCE
PRS-370 Series
32
Figure 6-3 Password entry screen
Figure 6-4 Entry of IET as password
Once the password IET has been input via touch
screen press the ENTER key. This will open the
Calibration screen as shown in Figure 6-5.
Figure 6-5 Resistor 1 Calibration Screen
The process is to measure the resistance with
a DMM using a 4 terminal Kelvin connection,
making sure the shorting links are not on the
binding post.
IET Labs uses the Fluke 8508A, set to 7 ½ digits
of resolution, during the adjustment process to
ensure the PRS-370 meets speci
fi cations.
NOTE: The mode the PRS-370 is in affects
how calibration is performed. If the PRS-370
is in PRS-DMM Mode then the calibration
process is completely automated with the
PRS-370 controlling the DMM during the
calibration process. If in Source Resistance
Mode the process is manual.
If the PRS-370 is con fi gured for PRS-DMM
Mode prior to going into the calibration routine
for the measurement of all 43 resistors is done
automatically with the PRS-370 controlling
the DMM. The PRS-370 should be con
fi gured
as outlined in Chapter 4. This is a completely
automated process.
If the PRS-370 is con fi gured for source resistance
mode the technician will have to manual perform
each resistance measurement and then manually
enter the resistance value for all 43 resistors.
Once the resistance is measured the resistance
value can be manually entered in ohms using
the keypad.
Once the resistance has been entered the NEXT
key can be pressed to move to the next resistor
value R2. The PREV key can be used to go back
to the previous resistance value if required. There
are 43 resistors which require calibration.
At anytime during the process the CNCL key
can be pressed to cancel the calibration process.
Cancelling the calibration process will not save