725Ex
Calibration Manual
28
Pressure Module Input
1. Connect a Fluke 700 Series Pressure Module to the 5-pin LEMO connector at the top
of the UUT; then press U.
2. Verify that the display first shows -----psi, then changes to a pressure value.
3. Disconnect the pressure module from the UUT.
The performance tests are now complete. Disconnect and secure all test equipment.
Calibration Adjustment Procedures
The 725Ex Calibrator has an electronic calibration. There are no mechanical adjustments
and the calibration is done case closed. The calibration is done via a serial
communications port, by sending and receiving commands and readings. For the serial
port connection, the 700SC Serial Interface Cable (PN 667425) will be necessary. This
permits communication through the pressure-port connection.
Throughout these procedures, the 725Ex is referred to as the UUT. Two methods of
calibration are available for the UUT: using a a serial-based program via a PC
(see Table 3 for requirements), and using a Met/Cal calibration procedure. This manual
only describes the serial-based PC program. The automated Met/Cal procedures are
available from the Fluke Metrology Group. For more information on the automated
Met/Cal procedures contact Fluke or visit the Fluke Web site at www.fluke.com
.
Setup
Setup the PC and the UUT as follows:
1. Ensure that the terminal communications software is installed on the PC.
2. Connect the interface cable to the appropriate connector on the UUT.
3. Connect the 9-pin 'D' connector to the PC serial port. An adapter may be needed for
PCs that use 25-pin 'D' serial connectors.
4. Verify the settings on the PC are as follows:
• Bits per second: 9600
• Data bits: 8
• Parity: None
• Stop bits: 1
• Flow control: None
• Local echo on
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