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Performance Testing and Calibration
Updating 2635A Data Bucket Embedded Instrument Firmware
4
4-27
Table 4-11. 4-Wire Ohms Calibration (Fixed Resistor)
Command Response Action
CAL 3 => Puts Hydra in OHMS Calibration.
CAL_REF? +290.00E+0 You source 290Ω from the decade resistance source or fixed resistor.
CAL_STEP? Hydra computes calibration constant 15 and returns the calibrated
reading. (For software versions lower than 5.4, this step computes
calibration constant 13.)
Note
If the input is incorrect, the "!>" response signifies that a Device
Dependent Error has been generated. The calibration step could not be
executed.Verify that the input to Hydra channel 1 is the correct value. If
the input is correct, Hydra may require repair.
CAL_REF? +2.9000E+3 You source 2900Ω.
CAL_STEP? Hydra computes calibration constant 16 and returns the calibrated
reading. (For software versions lower than 5.4, this step computes
calibration constant 14.)
CAL_REF? +29.000E+3 You source 29000Ω.
CAL_STEP? Hydra computes calibration constant 17 and returns the calibrated
reading. (For software versions lower than 5.4, this step computes
calibration constant 15.)
CAL_REF? +290.00E+3 You source 290000Ω.
CAL_STEP? Hydra computes calibration constant 18 and returns the calibrated
reading. (For software versions lower than 5.4, this step computes
calibration constant 16.)
CAL_REF? +2.9000E+6 You source 2900000Ω.
CAL_STEP? Hydra computes calibration constants 19 and 20 and returns the
calibrated reading. (For software versions lower than 5.4, this step
computes calibration constants 17 and 18.)
4-30. Updating 2635A Data Bucket Embedded Instrument
Firmware
The instrument firmware in the 2635A Hydra Data Bucket can be easily updated without
even opening the instrument case or replacing any parts. The instrument firmware is
stored in electrically eraseable and programmable Flash memory.
A diskette which contains the necessary software and the latest release of 2635A Data
Bucket firmware may be obtained from either your local Fluke authorized service center
or the Fluke factory. The local service centers are listed in Section 6 of this manual.
Contact the one nearest you. To request the "2635A Embedded Firmware Memory
Loader" diskette from the factory, telephone or send a fax to:
Fluke Corporation, Data Acquisition Sales Support Telephone: (206) 356-5870 FAX:
(206) 356-5790