TVC GFM2 User manual

[phone]
www.tvcalx.co.uk
The Validation Centre (TVC) Limited
Unit 15, Brinell Way, Harfreys Industrial Estate, Great Yarmouth, Norfolk,
NR31 0 U, UK.
[email protected]
GFM2
Gas Flow Meter 2 including Analysis Model
Instruction Manual
V2.0

Contents
1.0 Description 3
1.1 Items Supplied 3
1.2 Connectors and Controls 4
2.0 Operational Instructions 5
2.1 Operational Warnings 5
2.2 Powering Up the Unit 6
2.3 Selecting a Function 6
2.3.1 Function: Gas Type Selection 6
2.3.2 Flow Measurement 7
2.3.3 Function: Data Logging 8
2.3.3 (i) Data Logging: Nozzle Measurements 9
2.3.3 (ii) Data Logging: Inline 9
2.4 Data Viewing and Reporting 9
2.5 Viewing Logged Files 10
2.6 Transferring Logged Files into MS Excel Reports 11
2.6.1 Surge File Example 11
2.7 Removing Logged Files 12
2.8 Changing Measured Units or Date and Time 12
3.0 GFM2 Analysis Edition (Optional) 13
3.1 Field Calibration 15
4.0 Operational Flow Charts 16
4.1 Flow Chart 1 16
4.2 Flow Chart 2 17
4.3 Flow Chart 3 18
5.0 Battery Charging 19
6.0 Additional Information 19
6.1 Specication 19
6.2 Calibration 19
6.3 Disposal 20

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1.0 Description
1GFM2
2Battery charger
3Thread adaptors (male and female; 3/8” and 1/4”)
4Quick-t extensions with thread adaptors (male and female; 3/8”
and 1/4”)
5Nozzles (16mm, 19mm and 22mm; only one pictured above)
6Nozzle extension hose
7GFM2 to PC USB interface lead
8GFM2 to TVC Welding Data Logger interface lead (optional)
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1.1 Items Supplied
The GFM2 is supplied with the following:

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1.2 Connectors and Controls
1Quick-t ow inlet
2Quick-t ow outlet
3Display screen
4‘Reset’ button (reset peak gas ow value)
5‘Log’ button
6‘Up’ button
7‘Down’ button
Close up view of quick-t ow inlet and outlet
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2.0 Operational Instructions
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7USB / Welding Data Logger output connector
8Charger input
9On / O Switch
The following MUST be read before attempting to use the GFM2:
1 The GFM2 is designed for use on Inert Arc Welding Shielding
and Back Purging gases ONLY. The GFM2 is designed for
use with Inert Welding gases. NEVER attempt to monitor
Fuel gases or Oxygen with the GFM2.
2When measuring welding nozzle ow, always ensure that
the wire feed drive wheels are slackened o so that welding
wire cannot be fed through the GFM2.
3When using on equipment with High Frequency (HF) Arc
Starting always ensuring that the HF is turned o.
4DO NOT EXCEED THE MAXIMUM LINE PRESSURE OF 8
BAR!
2.1 Operational Warnings

2.2 Powering Up the Unit
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2.3 Selecting a Function
The GFM2 has been programmed with nine gas mix selections. As
standard, these are:
•Argon (Ar)
•Carbon Dioxide (CO2)
•Argon/CO2 Mixes (Ar-CO2)
•Nitrogen (N2)
•Argon/Helium Mixes 0 to 10% (Ar-He 10%)
•Argon/Helium Mixes 10 to 30% (Ar-He 30%)
•Argon/Helium Mixes 30 to 50% (Ar-He 50%)
•Argon/Helium Mixes 50 to 70% (Ar-He 70%)
•Argon/Helium Mixes 0 to 100% (Ar-He 100%)
Switch the On / O button to the ‘On’ position. The GFM2 LCD will
illuminate and the software version number together with the model type
will be displayed for a few seconds the screen will then revert to the
standard display layout.
2.3.1 Function: Gas Type Selection

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Use the ‘Up’ and ‘Down’ buttons to scroll between the available selections.
The selected gas is displayed at the bottom of the screen.
Select the required size nozzle and connect it to the GFM2 inlet tting
using the extension hose if required.
Insert the arc welding torch nozzle into the GFM2 nozzle ensuring a good
t. Check that the GFM2 unit is switched on and the correct gas type
selected.
Press the gas purge button on the arc welding set, once the ow has
stabilised read the ow in litres per minute (LPM) on the GFM2 display.
Once the gas stops owing the GFM2 display will turn red, and display the
total gas consumed. Further gas ows will be added to the gas consumed
total until the ‘Reset’ button is pressed. The total consumed can be read
o the display during gas ow on the ‘Cons’ area of the screen. Peak gas
ow is displayed on the ‘Peak’ screen which shows the highest peak ow
throughout the gas reading or series of readings taken. The ‘Reset’ button
resets these displays to zero also.
2.3.2 Flow Measurement
GFM2 with Nozzle

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GFM2 with Nozzle and Extension Hose
The data logging facility records ow results and surge data on the GFM2
internal memory. Recorded data can be downloaded from the GFM2 via
USB connection for direct import into the included data viewing and
reporting software. There are three modes for data logging:
Log 1 Quick, on-screen results.
Log 2 Logs gas over a set period, taking a gas reading every 20
milliseconds.
Log 3 Logs gas at regular intervals.
To select an alternative mode, press and hold the ‘Reset’ button for three
seconds to enter the ‘Setup’ screen. Press the ‘Up’ button to enter the
logging options screen. Press the ‘Log’ button to scroll through the three
logging options. Use the ‘Up’ and ‘Down’ buttons to change the logging
time in each option. Once selected, press ‘Reset’ twice to return to the
main screen.
2.3.3 Function: Data Logging

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2.3.3 (i) Data Logging: Nozzle Measurements
1Switch unit on.
2Select ‘Log 1’ mode. This provides a quick, ‘screen print’ of results.
3Connect the GFM2 to the welding torch using the correct size nozzle
adaptor.
4Start the ow of gas and allow to stabilise.
5Press the ‘Log’ button while gas is owing to record the gas ow data.
6Once the gas ow has been logged, the screen will display the gas
consumed and peak gas ow.
Connect the GFM2 into the gas line observing the correct gas ow
direction. DO NOT OVER-TIGHTEN CONNECTIONS! Use PTFE tape to
seal if required.
2.3.3 (ii) Data Logging: Inline
NB: DO NOT EXCEED THE RATED MAXIMUM PRESSURE OF 8 BAR!
For long periods of gas ow monitoring, the mains power supply can be
connected to the GFM2. Use either ‘Log 2’ or ‘Log 3’ depending on the
type of logging required.
Log 2 The GFM2 will start logging as soon as it sees the gas ow
and will stop logging once the pre-set time has been reached.
Log 3
The GFM2 will start logging as soon as the ‘Log’ button is
pressed and continue to log at the set intervals until the ‘Log’
button is pressed again.
2.4 Data Viewing and Reporting
To view the recorded data to a PC, connect the GFM2 using the USB
cable provided and view using the software included with the unit.

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The GFM2 unit will display the following screen whilst it is connected:
When the GFM2 is connected to a computer it will appear as a removable
drive in the Windows ‘My Computer’ page. Double-click the drive icon to
open the drive and nd the GFM2 les.
All logged gasses are stored under folders labelled by the date (day,
month, year i.e. 01042014). Open one of the folders to view the logged
gases for that day.
LOG.CSV contain all gas screen prints taken whilst in ‘Log 1’ mode.
.TXT
contain logged gasses whilst in ‘Log 2’ and ‘Log 3’ modes.
Each TXT. le is labelled using the time the gas was
logged (hours, minutes, seconds).
2.5 Viewing Logged Files