AMETEK PLA-PLW User Manual

Page 56

Do not deliberately try to trip the OVP circuit on when performing battery-testing applications. When an Over-voltage
condition occurs, the electronic load will try to sink more current in order to drop the input voltage source. In other
words, the input source is supplying more power than the electronic load is capable of handling. By trying to trip the
Over-voltage circuit, you may severely damage both the input source and the load.

LOCAL AND GPIB OPERATION INFORMATION

When the programmable electronic load is first turned on, the LCD will display LCL for local communication (via
keypad). When the electronic load is communicating via GPIB, USB, Ethernet or RS-232 remote control operation, the
LCD module will display GPIB/ETHER/RS-232/USB to inform the user that the keypad is disabled and the load is being
controlled remotely. Pressing the LOCAL key will change status from remote access to local operation.

MODE MENU OPERATION AND RANGE SETTING

The eLOAD provides a wide range of input operating modes CV/CC/CR/CP and range operation (Manual Low/Manual
Middle/Manual High/Automatic). The user is capable of activating any mode during the operation of the unit; however,
careful attention needs to be adhered to prior to entering the programming values for each operating mode and correct
range.

The Mode HOT Keys play an important role in switching operating mode (CV, CC, CR, and CP) and the “Range”
selection key allows easy range switching from manual (all ranges) to auto. By switching to other modes/range, the input
will shut off. A cross mode and cross range feature is offered on the eLOAD that will keep the input on when switching
between different modes and ranges. An important precaution is to make sure the proper settings are utilized for the
designated range. For example, if a PLA800-120-150 eLOAD is operating in CCH mode at 100A, and the mode is
crossed over to CPL, the input will shut off and display “OC”. The reason for the protection shutdown is due to the
maximum current in CPL is 15A, and 100A in that range is too high. To prevent from protection shutdown of the
eLOAD, ensure proper voltage and current settings before using the cross mode and cross range feature.

TO SELECT THE MANUAL MODE AND RANGE, SIMPLY FOLLOW THE PROCEDURE:

Press the Range key, and use the encoder to select between manual low, manual middle, manual high or
automatic. Select manual low and press enter.

Select the desired mode by pressing the corresponding hot key. Press the CC hot key.

Now the operating range is CC mode in low range.

TO SELECT THE AUTOMATIC MODE AND RANGE, SIMPLY FOLLOW THE PROCEDURE:

Example: If 300A is maximum current = high range, then 30A = low range.

Press the Range key, and use the encoder to select between manual low, manual middle, manual high or
automatic. Select automatic and press enter.

Select the desired mode by pressing the corresponding hot key. Press the CC hot key.

Now the operating range is CC mode in automatic range.

WARNING

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