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

Page 37

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!.

164-122012 PowerPOD 400

Page 37 of 42

Image 37

Contents Teledyne Hastings Manual Print History Table of Contents Four to Twenty Milliamp Operation Quick Start Instructions PowerSafety Front Panel Lockout FeaturesPower Selection PowerPod-400 Specifications Table SpecificationsChannel Number Select Keys Front PanelRear Panel Power WiringCommunications Transducer Connections AlarmsAnalog Signal Followers Changing the Command SET Point Power ON/OFFManual Operation Override OpenSetting a Channel to Directly Meter Incoming Signals Setting a Channel to Auto ControlSetting a Channel to Display the Totalizer Function Mode Reset Value Choosing RS-232 Communication External/Remote OperationChoosing RS-485 Communication Entering the SETUP/CAL Mode Setup/Cal ModeDisplay Setup Blanking a Display Line/ChannelSelecting Unit-of-Measure Setting A/D Conversion Rate FilterSelecting Gas ID Front Panel Lock Out Totalizer SetupCount Up to a Set Point RS-232 Settings External Communication SetupRS-485 Settings Count Down from a Set PointZero to Five Volt Operation Selecting the Analog Signal LevelZero to Ten Volt Operation Four to Twenty Milliamp OperationSetting a Single Channel’s High Limit Setting Limit AlarmsSetting a Single Channel’s Low Limit Setting a Single Channel’s HysteresisEnabling Ratio Control Setting Ratio Control ParametersResetting the Zero Only Calibrating a Channel to ITS Incoming SignalsResetting the Span Only Setting a Multiplication Factor Resetting Zero and SpanAlarm/Flag Queries CommandsSerial Communication Set Point QueriesPowerPOD Appendix a PowerPod-400 Serial CommandsPowerPod-400 Serial Commands Contd Appendix a Notes Name Rate Total ApppendixCBGas ID Table Page 1 Gas ID Table Page 2 Appendix D Setting the Zero & Span PowerPod-400 Power Supply/TotalizerZeroing Unit 4 to 20 mA Range Spanning Unit Transducer POWERPOD-400 PowerPOD Drawings Warranty Repair Policy Warranty