Calibration-PS
501
0
Performance Check Procedure
20.
Check Logic Supply Constant Current Range,
Step Size and Accuracy
a.
Determine the current to be verified within the specified
range of the instrument.
b.
Divide
5
V by the chosen current. This determines the
resistor required. If the exact resistor value is not
obtainable, make certain that the resistor selected
provides a voltage drop from
4.5
V to
5.5
V
at the
chosen current. Make certain the resistor has sufficient
wattage rating.
c.
Press the following buttons in the order listed:
SUPPLY SELECT
LOGIC
5
5
ENTER
CURRENT
Select the current desired and press ENTER.
Make certain the OUTPUT is OFF.
Connect the selected resistor across the LOGIC front
panel terminals.
Connect the dvm across the resistor.
Using the resistor value selected determine the voltage
drop across the resistor for the desired current.
Turn the OUTPUT ON.
CHECK-that the dvm reads a voltage indicating a cur-
rent through the resistor within
+:(5%
+20 mA) of the
current value selected.
Reduce the current limit
by
100 mA (press the INCRE-
MENT
1
pushbutton once).
I. CHECK-that the current flowing through the resistor
is from 70
mA to 130 mA less than the original current
selected.
m. Remove the dvm for the next step.
21.
Check Logic Supply Scaled Current Out
a.
Using the same setup in the previous step connect the
dvm to rear interface terminals 28A
(+
lead) and 27A
(-
lead). These terminals are not ground referenced.
b.
Determine the current flowing through the front panel
resistor connected to the LOGIC terminals.
e.
CHECK-that the dvm reads
1
mV k(20/0
+
1 mV) for
every
10
mA of current flowing through the resistor.
d. Remove all connections.
Check the GPIB Bus
via
the Controller
Refer to the talker-listener programs in the
Programming section of this manual.
Send commands using the program and observe the
front panel changes. Send SET? and note the data
returned to the controller.
CHECK-that the PS 5010 displays the voltages and
curents as sent and sends the correct voltages and
currents when queried.
Remove all connections.
This completes the Performance Check procedure.
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