GEM-500 Easy Steps

Printable Version

The following steps assume the use of DataField CS 3.0 or greater.

Steps to Clear Memory from Instrument (GEM-500)

• Turn on GEM-500
• Press 0 to go to Main Menu
• Press 1 General Utilities
• Press 9 More
• Press 4 Memory
• To Clear Readings Press 1
• If you wish to proceed, Enter 0102
• Press 0 Exit to Clear
• If you wish to Clear ID Info, Press 2
• If you wish to proceed, Enter 0102
• Press 0 Exit to Clear
• Press 0 to Exit

Create New IDs

• Start DataField 3.0 CS software
• Plug in instrument, turn on instrument and choose option 4 Download Data when instructed to by the software.
• Once communication is established a screen layout will be created specifically for the GEM-500.
• Click on the ID button
• Enter ID
  • Info/Desc
  • Pipe Diameter
  • Flow Device
• Click "SAVE" and save the file with a project name
• Click "SEND TO INSTRUMENT"

Steps to Calibrate Methane CH₄

It's important to field calibrate the GEM-500 on-site after the instrument has stabilized at working temperature.

• Turn Instrument GEM-500 On.
• Press 0 to go to Main Menu
• Press 1 General Utilities
• Press 9 More
• Press 6 Calibration
• Press 1 CH₄, from Calibrate Gas Type Menu
• Press 1 to Zero CH₄ Methane
• Connect the tubing from the Calibration Gas Regulator / Flow Meter to the GEM-500 Gas Sample Port
  • Note: If not using LANDTEC's supplied regulator, check the Calibration Gas Flow at 500cc and Pressure no greater than 2psig

Turn On the Gas Mixture 0₂

• Press 5 to turn pump On
• Once the readings have stabilized (1 Minute Approximately)...
• Press 1 Zero Level
• Turn Off 0₂ Gas Valve, and Disconnect from GEM-500 Port
• Press 5 again to turn Pump Off
• Press 0 Exit to return to the Methane Calibration Screen
• Press 2 Calibrate CH₄ Span
• Connect the Tubing from the Calibration Gas Regulator / Flow Meter to the GEM-500 Gas Sample Port
  • Note: If Not using LANDTEC's supplied regulator, check the Calibration Gas Flow at 500cc and Pressure no greater than 2psig
• Turn On the Calibration Gas Mixture of CH₄/CO₂.
• Press 5 Turn On Pump
• Allow Readings to Stabilize (1 Minute Approximately)
• Press 1 Enter Gas Con
• Enter the Gas Concentration as indicated on your CH₄ / CO₂ Nitrogen Gas Cylinder
• Press 0 to Exit
• Press 1 Yes
• If Calibration OK accepted, then Turn Off Calibration Gas Cylinder
• Remove Gas Hose attached to Gas Sample Port
• Keep Pump running to purge Instrument (1 minute Approximately).
• Press 5 for Pump Off
• Press 0 to Exit

Steps to Calibrate Oxygen O₂

• Press 3 O₂ from Calibrate Gas Type Menu
• Press 1 Zero 0₂
• Connect the Tubing from the Calibration Gas Regulator / Flow Meter to the GEM-500 Gas Sample Port
  • Note: If not using LANDTEC's Regulator, Gas Flow should be 500cc and Pressure 2psig
• Turn On the Calibration Gas Mixture of CH₄/CO₂
• Press 5 Turn On Pump
• Once the readings have stabilized (1 Minute Approximately)
• Press 1 Zero Level
• Keep Pump running for 60 Seconds to Purge Instrument
• Press 5 Pump Off
• Press 0 to Exit
• Press 2 Calibrate O₂ Span
• Change the Calibration Gas Mixture to Oxygen/Nitrogen and Connect it to the GEM-500 Sample Port
  • Note: If not using LANDTEC's Regulator, Gas Flow should be 500cc and Pressure 2psig
• Turn On the Calibration Gas Mixture O₂/Nitrogen
• Press 5 Pump On
• Allow O₂ readings to stabilize
• Press 1 Enter Gas Con
• Enter Gas Concentration as indicated on your Oxygen / Nitrogen Gas Cylinder
• Press 0 to Exit
• Press 1 Yes
• Turn Off Calibration Gas
• Disconnect 0₂/Nitrogen Gas Cylinder from GEM-500 Port
• Press 5 Pump Off
• Press 0 to Exit

Steps to Perform Readings

• Turn On Instrument
• Press 0 to go to Main Menu
• Press 2 Read Gas Levels
• Press 1 Read using ID?
• Press 1 (If you want to Scroll)
• Press 2 (If you want to Enter Manually)
• (If you Scroll), Press UP or Down Arrows and #2 to Select
• Press 1 to Read
• Press 5 Pump On
• Allow Readings on left side of the screen to become stable
• Press 5 Pump Off
• To record Temperature and Probe Depth, Press 2 More
• Press 1 to Enter Temperature
• After Entering Temperature, Press 0 to Exit
• Press 3 to Zero Pressure
  • Note: Disconnect hose before zeroing, Then Press any key
• Press 1 to Zero Pressures
• Press 0 to Exit
  • Note: Reconnect hose. Allow the Instrument to read
• Press 2 Continue
• If the Flow needs to be changed adjust the control valve on the Well head.
• Press 6 to Store
• Press 1 or 6 to scroll Up or Down Comments
• To select a Comment, Press 2
• Press 0 to Store
• If you want to go to Next ID then,
• Press 4 to go to Next ID
• Press 2 to Purge
  • Note: Warning: Disconnect Hose from the Well
• Press 1 to Begin Purging
• Press 0 to Back
• Press 0 to Exit Purge
• Press 1 for Next ID
• Begin Reading Process Again!

Steps to Download Readings to Datafield

• Start DataField 3.0CS software
• Plug in instrument, turn on instrument and choose option 4 Download Data when instructed to by the software.
• Once communication is established a screen layout will be created specifically for the GEM-500 instrument.
• Click on the readings button
• Click on the button labeled "Load From Instrument"
• The readings will be transferred from the GEM to the computer.
• Click on the Save File button to save the readings from Datafield 3.0CS to a file.
  • Hint: be sure to end the file name with a .CSV (this will assist with opening the file in Excel)