Fluke 5725A Amplifier Product Review
The Fluke 5725A Amplifier is an amplifier companion that is used with the Fluke 5700A calibrator to enhance functionality in the calibrator’s direct current (dc), alternating current (ac) and alternating current voltage (ac V) functions. Its operation is totally controlled by the 5700A through a cable connected interface.
The Shielded Interface Cable supplied with Fluke 5725A amplifier is used to connect to the 5700 series calibrator. Once an established connection is made, the Fluke 5725A amplifier functions under full control of the 5700A calibrator. The Fluke 5725A amplifier is controlled from the 5700A calibrator front panel or by sending remote commands to the 5700A. The 700A/5725A shielded interface cable not only provides all the digital and analog control signals for the amplifier, but also provides the conductors with a mechanism to pass amplified voltage to the 5700A calibrator output binding posts. The 5725A amplifier has cable off indicator feature which is lit when the interface cable is not connected, or when the 5700A power is turned off.
The Fluke 5725A amplifier enhances performances of at least two models of calibrators, both 5700A and 5720A models. Specifically, it enhances the 5700A calibrator alternating current voltage output by ensuring that capacitive load limits are increased to 1000pF and frequency limits at higher voltage are increased to 100 kHz at 750V and to 30 kHz at 1100V. The amplifier allows load limits to be increased to 70 mA for frequencies above 5 kHz, and to 50 mA for frequencies less than 5 kHz. It also can increase maximum direct current and alternating current to 11A.
Accuracy, reliability and dependability of all electronic internal parts of the Fluke 5725A amplifier are ensured by maintaining the coolest possible temperature of the internal electrical components. This is made possible by the quality design of the amplifier. This smart design technology incorporates a fan responsible for directing a constant cooling air flow and an advanced filter which is covers the air intake to keep dust and small particles out of the instrument.
The amplifier also has a nonvolatile memory that stores the amplifier calibration constants. The calibrator integrity is ensured by calibration seal placed after storage of corrections generated during the calibration process. The calibration switch feature in the Fluke 5725A amplifier enables user to control usage of the nonvolatile memory. Switching to ENABLE mode gives the user rights to write to the memory, and switching to NORMAL mode protects data in memory from being overwritten.
It is easy to troubleshoot connection problems when using the 5725A amplifier and 5700A calibrator. In an event of fault occurrence FAULT Indicator feature is lit and a message appears on the 5700A calibrator display.
From idle, it takes twice the warm up time since the last time the unit warmed up to 30 minutes max. The unit is configured for rear output, and there is also an available rack mount kit. Standard interfaces include RS-232, IEEE-488, 5205A, 5725A, 5220A, 5215A or 5205A, (BNC) phase out and (BNC) phase lock in.