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2620A, 2625A
Users Manual
6-22
no parts to disassemble, no mechanical adjustments to make, and the instrument can be
calibrated by an automated instrumentation system.
The instrument should normally be calibrated on a regular cycle, typically every 90 days
or 1 year. The chosen calibration cycle depends on the accuracy specification you wish
to maintain. The instrument should also be calibrated if it fails the performance test or
has undergone repair.
Note
Do not press CAL ENABLE unless you have a copy of the Service Manual
and intend to calibrate the instrument. If you have activated calibration
and wish to exit calibration, press CAL ENABLE until CAL disappears
from the display (or press power OFF).
Refer to the Hydra Series II Service Manual for the essential calibration procedures.
Variations in the Display
Note
This feature is not available with instruments having Main Firmware
version 5.5.
Under normal operation, the display presents various combinations of brightly and dimly
lit annunciators and digits. However, you may encounter other, random irregularities
across different areas of the display under the following circumstances:
• After prolonged periods of displaying the same information.
• If the display has not been used for a prolonged period.
This phenomenon can be cleared by activating the entire display and leaving it on
overnight (or at least for several hours). Use the following procedure to keep the display
fully lit:
1. With power OFF, press and hold SHIFT, then press power ON.
2. Wait a moment for the instrument to beep, then release SHIFT. The entire display
will now stay on until you are ready to deactivate it.
3. At the end of the activation period, press any button on the front panel; the
instrument resumes the mode in effect prior to the power interruption (Active or
Inactive.)
Service
If the instrument fails, check that operating instructions presented earlier in this manual
are being followed. If the problem cannot be remedied, forward the instrument, postage
paid, to the nearest Fluke Service Center. Be sure to pack the instrument securely; use
the original container if available. Include a brief description of the problem. Fluke
assumes NO responsibility for damage in transit.
To locate an authorized service center, visit us on the World Wide Web: www.fluke.com
or call Fluke using any of the phone numbers listed below.
1-800-44-FLUKE (1-800-443-5853) in U.S.A. and Canada
+31 402-678-200 in Europe
+81-3-3434-0181 Japan
+65-*-276-6196 Singapore
+1-425-356-5500 in other countries