Calibrating Instruments
Setting the High Resistance Source Output 4
4-7
5. Using the Terminals part of the display as a guide, connect the UUT’s terminals to
the Calibrator’s terminals.
6. After confirming all settings and connections are correct, press O to connect the
UUT to the selected resistance.
R
OUTPUT V, HIΩ, mA~
HI LO
ehq011.eps
Figure 4-3. Simplified High Resistance Source Scheme
While connected to the UUT, the Calibrator monitors the voltage appearing across the
resistance. If the voltage exceeds acceptable limits, the Calibrator will disconnect the
output terminals and display an error message. The measured voltage and current, along
with the maximum allowed voltage across the selected resistor, is shown in the
PARAMETERS area of the display.
ehq059.bmp
Figure 4-4. Typical High Resistance Display
WCaution
To avoid overloading the Calibrator, make sure the voltage
applied by the UUT will not exceed the maximum allowed value
before adjusting the output value.
With the output connected, you can adjust the resistance value with the keyboard, cursor
keys, or rotary knob. Any new values set using the front panel can take approximately
500 ms to actually appear on the output terminals. If during the adjustment, the current or
voltage exceeds acceptable limits, the output terminals will be disconnected and an error
message displayed. If the set value should exceed the upper range limit or lower range
limit, the Calibrator displays “Value too high” or “Value too low”, respectively.
To switch between grounded and ungrounded output:
To Next Page
Loading...
