Teledyne powerpod 400 instruction manual Zeroing Unit 4 to 20 mA Range

14.2 Zeroing Unit (4 to 20 mA Range)

The following instructions explain how to use the POWERPOD-400 command signal to supply 4mAmp signal to a channel’s input and set the display to read zero at this current level.

Disconnect all connectors from the channel to be calibrated.

Insure that the channel is set to read 4 to 20 mA signals by performing the following steps. Press MODE

Press 3

Press ENTER

Press 1, 2, 3 or 4, depending on which channel is to be zeroed. Press ENTER

Press 4

Press ENTER Press 3 Press ENTER

The normal display returns and will respond in the 4 to 20 mA mode.

Connect a milliamp meter between pins 14 and 6 on the 15-pin ‘D’ connector corresponding to the channel to be calibrated.

J1 = Channel 1

J2 = Channel 2

J3 = Channel 3

J4 = Channel 4

Set the command for the selected channel to zero.

Press the CHANNEL # button

Press 1, 2, 3 or 4, depending on which channel is to be zeroed.

Press 0.0 using the numbered key pad

Press ENTER

The milliamp meter should be reading between 3.996 and 4.004 mAmps.

To Zero the meter with a signal of 4mA, perform the following steps.

Press MODE

Press 3

Press ENTER

Press 1, 2, 3 or 4, depending on which channel is to be zeroed.

Press ENTER

Press 7

Press ENTER

Press 1

Press ENTER

Press ENTER again

You have just told a channel to display zero when the input signal is 4mA!.

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