Teledyne powerpod 400 Calibrating a Channel to ITS Incoming Signals, Resetting the Zero Only

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10.8. CALIBRATING A CHANNEL TO ITS INCOMING SIGNALS

The POWERPOD-400is designed to accept the input from almost any transducer that operates in the ranges of zero to five volts, zero to ten volts or four to twenty milliamps. In most cases, transducers are capable of having their minimum signal and maximum signal adjusted to correspond with the minimum (ZERO) and maximum (SPAN) unit-of-measure that they are designed to reflect.

For example:

A transducer designed to output 0 volts while reading a temperature of 0 degrees centigrade and output 5 volts while reading 100 degrees centigrade is connected to channel one of the POWERPOD-400.

In actuality, the transducer is sending -0.23 volts at 0 degrees and 5.11 volts at 100 degrees. By zeroing channel one of the POWERPOD-400while reading the low signal from the transducer, the display will be

000.0when the temperature is 0°C. Like wise, by setting the CAL value to 100.0 while reading the 5.11 volt signal causes the POWERPOD-400to display 100.0 when the temperature is actually 100°C.

This procedure will not account for any non-linearity in any transducer’s output. That is, the accuracy/calibration of any transducer must be independently set, checked and verified before connecting to the POWERPOD-400, or, the transducer/ POWERPOD-400 combination must be calibrated together as a system, if the accuracy of the whole system is to be known.

10.8.1. Resetting the Zero Only

While the SETUP/CAL menu is being displayed and after making a selection from the CHANNEL SELECT menu, select CALIBRATE by pressing the number 7 key followed by ENTER, then choose ZERO ONLY by pressing the number 1 key and ENTER. The ZERO menu will be displayed which also displays the selected channel number and the signal being received. If this signal is an acceptable signal for zero, press the ENTER key to accept it. If the indicated signal is not an acceptable level for reading zero, the operator has an opportunity at this stage to correct any problems while reading the incoming signal before pressing the ENTER key and accepting it. Alternatively, the operator can press ESC to exit the SETUP/CAL mode and return to it later. After accepting the displayed signal level as the zero point, the display returns to its previously programmed settings. See Appendix D.

10.8.2. Resetting the Span Only

After selecting a channel in the CHANNEL SELECT portion of the SETUP/CAL menu, press 7 + ENTER to select CALIBRATE. SPAN ONLY is selected by pressing number 3 + ENTER. The SPAN window is displayed which contains the chosen channel and the incoming signal on that channel. If the displayed signal is an acceptable full range value, press ENTER to accept it. The previously programmed display returns with the selected channel now displaying the CAL’d value. If the incoming

164-122012 PowerPOD 400

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Contents Teledyne Hastings Manual Print History Table of Contents Four to Twenty Milliamp Operation Power Quick Start InstructionsSafety Features Front Panel LockoutPower Selection Specifications PowerPod-400 Specifications TableFront Panel Channel Number Select KeysRear Panel Communications WiringPower Alarms Transducer ConnectionsAnalog Signal Followers Manual Operation Power ON/OFFChanging the Command SET Point Override OpenSetting a Channel to Display the Totalizer Function Setting a Channel to Auto ControlSetting a Channel to Directly Meter Incoming Signals Mode Reset Value Choosing RS-485 Communication External/Remote OperationChoosing RS-232 Communication Display Setup Setup/Cal ModeEntering the SETUP/CAL Mode Blanking a Display Line/ChannelSelecting Gas ID Setting A/D Conversion Rate FilterSelecting Unit-of-Measure Count Up to a Set Point Totalizer SetupFront Panel Lock Out RS-485 Settings External Communication SetupRS-232 Settings Count Down from a Set PointZero to Ten Volt Operation Selecting the Analog Signal LevelZero to Five Volt Operation Four to Twenty Milliamp OperationSetting a Single Channel’s Low Limit Setting Limit AlarmsSetting a Single Channel’s High Limit Setting a Single Channel’s HysteresisSetting Ratio Control Parameters Enabling Ratio ControlResetting the Span Only Calibrating a Channel to ITS Incoming SignalsResetting the Zero Only Resetting Zero and Span Setting a Multiplication FactorSerial Communication CommandsAlarm/Flag Queries Set Point QueriesPowerPOD PowerPod-400 Serial Commands Appendix aPowerPod-400 Serial Commands Contd Appendix a Notes ApppendixCB Name Rate TotalGas ID Table Page 1 Gas ID Table Page 2 Setting the Zero & Span PowerPod-400 Power Supply/Totalizer Appendix DZeroing Unit 4 to 20 mA Range Spanning Unit Transducer POWERPOD-400 PowerPOD Drawings Warranty Warranty Repair Policy
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