Fluke 5820A, Руководство оператора

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5820A
Operators Manual
4-36
4-51. Setting the Output Channel
This can be done only with the 5-channel option. This feature allows you to select the
output channel. To select a channel, press
`
. The following menu appears:
Select Channel:
CHAN 1 CHAN 2 CHAN 3 CHAN 4 CHAN 5
f f f f f
Select the desired menu and press
`
again to go back to the original menu.
4-52. Using an External Reference
The calibrator uses an internal 10 MHz clock signal as a reference for all ac functions.
Although this internal clock is very accurate and stable, you may have a lab standard that
you want to govern the frequency performance of the calibrator. To apply an external
clock to the calibrator, you can make external reference the power-up and reset default
condition.
To make external reference the power-up and reset default setting, proceed as follows:
1.
Connect a 10 MHz squarewave signal of 5 V p-p (maximum) to the EXTERNAL
REFERENCE connector.
2. Press
p
.
3. Press the following sequence of softkeys: INSTMT SETUP | OTHER SETUP | REF
SETUP.
4. Press the REF CLK softkey to select “external.”
5. Press
m
.
4-53. Using the Current Output Function
Access the current output function as follows:
1.
Press the
ã
key followed by the OTHER and CURRENT softkeys. The Control
Display shows a label on the right that identifies the mode as “amp.”
2. The leftmost softkey says “DC ONLY.” If an ac current value is desired, press the
DC ONLY softkey and enter the desired frequency.
3. Attach the current probe to the current loop located just above the 5800A Calibrator
power button.
4. Press
l
.
5. To determine the error of the unit under test, turn the knob to activate edit mode.