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Calibration Adjustment
Calibration adjustment should be done at the desired interval, or whenever a
verification test indicates that a Product function is out of tolerance. Product
accuracy stays within specifications only if the adjustment procedure is done at
regular intervals. A one-year interval is adequate for most applications. Product
accuracy specifications are not valid beyond the one-year interval.
Adjustments are accessed through both the remote interface and front panel with
a series of adjustment steps. The remote program directs the test equipment to
apply a series of shorts, opens, voltages, currents, and resistances to the
Product. At each step, the Product internally makes the necessary adjustment to
bring the Product into specification. No internal mechanical adjustments are
necessary.
With an automated, computer-controlled procedure, the calibration and
verification procedures can be done in under an hour. A simple adjustment
program is listed in the Sample Adjustment Program section. A MetCal program
is available at
Adjustments are password protected to prevent accidental or unauthorized
adjustments. The admin password must be entered through the front panel or
remote interface.
Unlock the Product
To unlock the Product for adjustments from the front panel:
1. Push Instrument Setup.
2. Push Calibrate.
3. Use the numeric keypad to enter the 4-digit admin password.
4. Push OK to enter the password and continue the adjustments procedure.
The Product is shipped from the factory with the password set to 2638.
Unlock the Product with a Remote Interface
To unlock the Product with a remote interface, send the command:
CAL:SEC:STAT OFF,"2638"
To relock the Product, send the command:
CAL:SEC:STAT ON
www.fluke.com
to adjust the Product.
HYDRA Series III Data Acquisition Unit
Calibration Adjustment
33
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