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Issue: 1.04
another terminal emulator. For further details of how to connect a PC to your
microK see section 8.
Once you have established communication with your microK, type in the
following commands and check that the measured current is within the given
limits:
command
current limits
TEST:CURR 0.1
0.0996 to 0.1004 mA
TEST:CURR 1
0.996 to 1.004 mA
TEST:CURR 10
9.96 to 10.04 mA
TEST:CURR -0.1
-0.09966 to -0.1004 mA
TEST:CURR -1
-0.9966 to -1.004 mA
TEST:CURR -10
-9.96 to -10.04 mA
7.1.2 Resistance Measurements
The current reversal used by the microK to eliminate the effect of thermal EMFs
means that it has an inherently stable zero for resistance measurement. The zero
ohms test does not form part of the calibrations process but is used to confirm
correct operation of the measurement system. It only needs to be checked on one
channel.
7.1.2.1
Zero Ohms Check
Start by applying a four terminal short-circuit to channel 1. This involves
shorting out the voltage sense terminals (marked “V”) and the current terminals
(market “I”) and then making a single connection between these two set of
terminals. The objective is to ensure that none of the sense current passes along
the wire between the voltage sense terminals. This can easily be achieved using a
single piece of un-insulated wire:
