User Manual - Rev AJ
California Instruments
6.5 Non-Routine Calibration
The
Use
mai
6.5.1 Powe
non-routine calibration may involve removing the front or top cover of the power source.
extreme caution when performing any of these tasks while the system is connected to AC
ns and/or powered up.
r Source Gain Adjustment
For any MX configuration that requires two or more amplifiers to be operated in parallel for
increased curre
amplifier gains ha
d as
ssible to ensure
equal current sharing. If an unbalance exists between amplifier outputs, one or the other
amplifier will de
may run
current lim
ction before full output
power can be a
This procedure details the gain adjustment. G
already set correctly so this task should only be undertaken if an amplifier has been replaced or
if two MX units are to be combined that were not originally shipped from the factory as such.
To make this adjustment the front cover must first be removed in order to get access to the
power module
ower s
o be adjus
n MX45-1, the procedure
involves matching the output voltage of the B and C power modules to the A module. Proceed
as follows:
1. Verify the controller is indeed set for 1-phase operation.
2. Shut off all power to the cabinet. Disconnect the two wires going to Terminal 6 and Terminal
7 on the lower front of the power modules. Do this to module B and C only. Place some
temporar
3. Connect a DMM between terminals 6 and 7 on the A module. Power up the cabinet. Set the
controller to the 300V range, program 230V at 60Hz. Enable the output by pressing the
OUTPUT
4. Measure
disable th
5. Move the DMM leads to the B module terminals 6 and 7. Press the OUTPUT ON/OFF key
again to enable the output. Verify the phase B module output is within 50mVolts of the A
module. If it is not, adjust the pot behind the hole in the upper left corner of the module so
the B output matches the A output within 50mVolts. Press the OUTPUT ON/OFF key to
disable th
6. Move the DMM leads to the C module terminals 6 and 7. Press the OUTPUT ON/OFF key
again to enable the output. Verify the phase C module output is within 50mVolts of the A
module. If it is not, adjust the pot behind the hole in the upper left corner of the module so
the C output matches the A output within 50mVolts.
7. Power down system and replace the wires to terminals 6 and 7 on the B and C modules.
nt output, the
ve to matche
closely as po
liver more current and
into its
it prote
ttained.
enerally, MX units are shipped with the gains
output terminals. If the p
ystem t
ted is a
y insulation over the lug ends.
ON/OFF key.
the A module output voltage and write it down. Press the OUTPUT ON/OFF key to
e output.
e output.
MX Series
171
Содержание MX30-1
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