Performance Tests; Preparing For The Performance Tests - Fluke 725Ex Calibration Manual

725Ex
Calibration Manual

Performance Tests

Some of the performance tests involve the use of high voltages and
should be performed by qualified personnel only.
To avoid electric shock, always set the calibration source (5520A) to
Standby (STBY) mode between tests and before handling the test
connections or test cables.
Performance tests confirm the complete operability of the Calibrator and check the
accuracy of each function against the Calibrator's specifications.
If the Calibrator fails any performance test, it needs calibration
adjustments. If the Calibrator continues to fail after calibration
adjustments, send it to an authorized Fluke Service Center for repair.
The Calibrator's performance and accuracy are specified for one year after calibration at
operating temperatures of +18 °C to +28 °C (64 °F to 82 °F), in relative humidity to
90 %. The specifications assume the Calibrator has been warmed up for five minutes
before use.
It is not necessary to open the case for the performance tests; no mechanical adjustments
are necessary. Merely make the required connections, source the designated values, and
determine if the reading on the Calibrator or the multimeter falls within the acceptable
range indicated.

Preparing for the Performance Tests

Performance tests for the Calibrator can be performed manually, or they can be
computer-automated (using Fluke Metrology Software). The Metrology Software
automates all of the performance-verification tasks, except for connection of the
standards to the Calibrator. This document provides the procedures necessary for manual-
performance tests. Contact Fluke for information on Metrology Software.
These performance tests assume that the person performing them knows how to use the
Calibrator and the required equipment.
Do not attempt to perform these tests unless qualified to do so.
Throughout the performance tests, "UUT" (unit under test) refers to the Calibrator; the
word "multimeter" is reserved for the digital multimeter identified in the required
equipment listed in Table 3.
Unless otherwise indicated, all connection diagrams for the verification tests in this
manual showing a calibrator or digital multimeter use a Fluke 5520A Calibrator or HP
3458A DMM. If using a different DMM, make the connections appropriate for that
instrument.
To prepare the UUT for the performance tests, do the following:
1. Make sure that the required equipment is available, see Table 3.
2. Make sure the UUT has fresh batteries. See "Replacing the Batteries".
3. Warm up the Calibrator and multimeter as required by their specifications.
4. Remove all test leads from the front of the UUT.
5. Make sure that the UUT is in a stable ambient temperature between 18 °C and 28 °C
12
(64.4 °F and 82.4 °F) and that it has been warmed up for five minutes.
XW
Warning
Note