Compaq MTEK6000 user manual Calibration Mode, Calibrating the Pressure Transducer

Page 36

MTEK6000 SERIES USER'S MANUAL

CALIBRATION MODE

Calibration mode allows the user to calibrate any of the analog signals, such as the pressure transducer or the temperature probe. While operating in the calibration mode, the MTEK6000 continues to store pulses and periodically updates volume, pressure, and temperature data using the values measured when calibration mode was initially entered. Once in calibration mode, the user can perform the following operations:

1.Calibrate zero only.

2.Calibrate span only.

3.Calibrate both zero and span.

Of course, the option to change the calibration reference points is available at all times. Several other features make the software calibration routine attractive and more intuitive. In the MTEK6000, unit calibration is software-based; there is no need for laborious operator adjustments. Software calibration does away with the need for repetitive potentiometer adjustments, thereby simplifying field calibration procedures.

In order to perform calibration, you will need a pressure source, temperature source, and accurate reference indicators. You will also need the Metretek, Inc. Virtual keypad or the optional external keypad and display.

Calibrating the Pressure Transducer

NOTE

Pressing esc repeatedly from anywhere within the calibration procedure will back the operator out of calibration mode.

3-10

1.Display the line pressure by pressing F3 or jumping to 030302.

2.Press cal. Enter your password at the optional PASSWORD? prompt, if required.

3.The unit will enter calibration mode. The display will alternate between CALIBRATING and the parameter label (Pressure for example).

4.Close the shut-off valve between the pressure source and the pressure transducer.

5.Open the pressure sensing line on the unit to the atmosphere, and wait until the line is fully vented and the reading is stable.

6.Press zero. The display now shows:

ZERO> XX.XXX

NEW?>

XX.XXX represents the unit's default zero value. If the current zero reference matches the unit's default, simply press ent to collect the new point. Otherwise, key in the value of the current reference before pressing ent. The unit should display Calculating . . .

briefly, and then display the new point. Pressing esc instead of ent at this point aborts the operation and returns you to the calibration prompt.

7.Apply the span (full scale) reference to the pressure sensor and wait for the reading to stabilize

8.Press span. The unit now shows:

SPAN> XX.XXX

NEW?>

January 2002

Image 36
Contents MTEK6000 Series Table of Contents Optional Equipment List of Figures January January Overview Hazardous LocationsONE-YEAR Warranty ComplianceSecurity Options MTEK6000 exterior view MTEK6000 interior view Unpacking Initial Check OUTPower for the MTEK6000 Optional Power SuppliesMounting the Instrument on the Meter Setting UP the Index Assembly Output Shaft RotationUnit and Index Rotation Counter MaskingPulse Input to the MTEK6000 Wall and Pipe MountingWall Mounting Connecting the Pressure Tubing Transducers in the MTEK6000Typical Installation for MTEK6000 EFC Installing the Thermal Probe Pipe Size Insertion Thermowell Length Part NumberInstalling the Pulse Output Wiring Pulse Output WiringVolume and Alarm Pulse Specifications Uncorrected Pulse Output SpecificationsConnecting the Telephone Line CommunicationsRS-232C Serial Direct Communications 9600 Baud Modem Communications 2400 BaudActivity Indicator MTEK6000 Function RS232 cable connected January Grounding ReferencesJanuary SLEEP/WAKE-UP Mode Display ModeAlarm Mode Viewing and clearing alarms using the magnetFaulty Counter Alarm EFC First Time Power AlarmHigh Flow Rate Alarm EFC & EFM High Differential Pressure Alarm EFMLow Pressure Alarm Low Supply Volts AlarmsLow Temperature Alarm Lost Temperature AlarmOpen Door Alarm optional Software Error AlarmMemory History Logging Configuration Mode Editing ParametersOptional Keypad and Display Assigning Function Keys Audit TrailWake-Up on Pulse Event Driven Analog SamplingSpecial Key Combinations Calibration Mode Calibrating the Pressure TransducerCalibrating the Temperature Transducer Zero NEW?Calibrating the Differential Pressure Transmitter EFM Only Optional Equipment Analog Output AO OptionAnalog Output Option MTEK6000 Analog Output Specifications Zero x.xxx 04.000 +y.yyy mA Enclosure Maintenance Changing the BatteryCalibration PcGas Meter Utility Package PcGas Customer MonitorMtek Manager DC2000 January Alarms Alarm Code Label I.D Description AddressTable A-5 Standard alarms for MTEK6000 EFC w/ Aux Pressure Label Description Address Aux Pressure Table A-11 Standard alarms for MTEK6000 EFC2 w/2 Aux Press Table A-14 Standard alarms for MTEK6000 EFM w/ Aux Press MTEK6000 EPR MTEK6000 ETR MTEK6000 Eptr January AGA-7 Volume Calculations NX19 Supercompressibility ReportJanuary Alarm Pulse Output Enable/Disable Alarm Pulse Time msAudit Trail Logging Enable Analog Sampling Rate secondsBase Temperature Calibrate Mode Time-outCalibration Password Configuration PasswordFlow Rate Update Interval s Cubic Unit/Pulse In or Meter DriveDate Month, Day, Year High Flow Rate Alarm Setpoint High Pressure Alarm SetpointHigh Pressure Alarm Reset High Temperature Alarm ResetLow Pressure Alarm Setpoint Low Supply Voltage Alarm ResetLow Supply Voltage Alarm Setpoint Low Temperature Alarm ResetUncorrected Volume Time Hhmmss Hours, Minutes, SecondsWake Up Interval seconds Wake Up On Pulse event driven EFCFlow & Volume Temperature DifferentialUnits of Measure AccumulationsJanuary SBC Revision a Corrector Board OPT Revision a Option Board Description Jumper positionPulse Input #1 PLI Revision C Phone Line Interface Service Requirement Consumer Information and FCC RequirementsWarranty & Repair Service EL0001 Sheet 1 of 2 Class I Division 2 Installation EL0001 Sheet 2 of 2 Class I Division 2 Installation Warranty Information January Appendix G TII Station Protector January Appendix H Hazardous Area Installation Control Drawings October October