TVC HPM-01 User manual
Contents
1.0 Description 3
1.1 Items supplied 3
1.2 Controls and connectors 4
2.0 Operational instructions 5
2.1 Operational warnings 5
2.2 Turning the unit on 5
2.3 Buttons 6
2.4 Sampling 7
2.4.1 Inline magnetic lter connection 7
2.4.2 Gas sampling 8
2.4.3 Dew Point / Moisture Option 8
2.5 Data Logging 10
2.5.1 Log 1 10
2.5.2 Log 2 11
2.5.3 Log 3 11
2.6 Limits 11
2.7 Data viewing and reporting 12
2.8 Viewing logged les 13
2.9 Transferring logged les 13
2.10 Removing logged les 13
2.11 Changing measured units or date and time 14
2.12 Field calibration 14
3.0 Battery charging 15
4.0 Additional information 16
4.1 Specication 16
4.2 Calibration 17
4.3 Disposal 17
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1.0 Description
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1.1 Items supplied
The Handheld Purge Monitor (HPM) is available in two editions: the HPM-
01 and HPM-02.
The HPM is supplied with the following:
Measurement range and resolution separates the two models as follows:
HPM-01 HPM-02
�General purpose / wide range �High precision / wide range
�Measuring range of 0 – 21% �Measuring range of 0 – 1200ppm
�Resolution readings greater
than 5% - 1% �Measuring range of 0 – 21%
�Resolution readings less than
5% - 0.01% (100ppm) �Resolution readings greater than
5% - 1%
�Resolution readings between 5%
and 500ppm – 50ppm
�Resolution readings between
500ppm and 250ppm – 25ppm
�Resolution readings between
250ppm and 50ppm – 10ppm
�Resolution readings between
50ppm and 0ppm – 1ppm
�Dual sensors, auto selecting
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1.2 Controls and connectors
1Quick-t ow inlet (magnetic lter and sampling tube connection)
2Exhaust outlet
3Sampling tube
4‘Reset’ button
5‘Log’ button
6‘Up’ button
7‘Down’ button
4
5
1HPM
2Sampling tube
3USB connection cable
4Battery charger
5Rugged carry case
6Magnetic lter
2.0 Operational instructions
5
7USB connector
8On / O Switch
9Charger input
The following MUST be read before attempting to use the HPM:
1 For use on Inert Arc Welding Shielding and Back Purging
gases ONLY.
2For use with Inert Welding gases. NEVER attempt to monitor
Fuel gases or Oxygen > 25% with the HPM.
3Do not place the HPM unit on or directly next to the welding
power source.
4DO NOT EXCESSIVELY PRESSURISE THE GAS INPUT!
2.1 Operational warnings
2.2 Turning the unit on
Switch the on / o switch to the ‘On’ position. The HPM LCD will illuminate
and the software version number, together with the model type, will be
displayed. The screen will revert to the operating display after a few
seconds.
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2.3 Buttons
Use the ‘Down’ button to start sampling of the purge gas. The screen will
change from ‘ --.--’ to the O2 concentration in either percentage (>=
1% O2) and PPM (< 1% O2).
Pressing the ‘Down’ button again will stop the sampling and the HPM
returns to standby mode.
Press and hold the ‘Up’ button to initiate the periodic user calibration, i.e.
‘zeroing’; see Section 2.12 for further details on ‘zeroing’.
Press and hold the ‘Down’ button to reset / delete the user calibration.
Press the ‘Log’ button to start the HPM logging; see Section 2.5 for further
details on data logging.
Press and hold the ‘Reset’ button to enter the setup menu to select the
required logging mode and adjusting the limits.
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2.4 Sampling
2.4.1 Inline magnetic lter connection
If the HPM unit is to be used on pipework where a lot of grinding takes
place, e.g. grinding out bullets, it is advised that the inline magnetic lter
is tted to stop any grinding dust getting on to the sensor.
Connect one end of the magnetic lter to the sampling tube.
to HPM
gas inlet
to
sampling
tube
Connect the other end of the magnetic lter to the HPM.
The inline magnetic lter connects between the HPM and the sampling
tube hose.
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Place the sampling tube into the purge gas to be sampled. The HPM is
designed to sample the purge gas and is not designed to be the gas
exhaust port for all the purging gas. Over pressuring the HPM will
cause errors in the O2 readings!
Press the ‘Down’ button to start the sampling process.
When the required sampling of the purge gas is complete, the sampling
tube should be removed from the purge gas and the sampling stopped on
the HPM.
Press the ‘Down’ button.
NB: The HPM has a built-in non-user serviceable lter to protect the
sensors. If the HPM is used in an environment where dust or other
ne particle contaminates could enter the sampling tube, an external
magnetic lter should be used. Cleanable lters are available from
TVC.
2.4.2 Gas sampling
2.4.3 Dew Point / Moisture Option
When purchased, an additional sensor for the inline measurement of the
Purging Gas Dew Point and moisture volume is tted in the HPM sensor
block, this can be tted to either the HPM-01 or HPM-02 base units.
On initial switch on the tment of the Dew Point/Moisture option is
identied by the ‘-H’ after the HPM model.
When sampling is started the Dew Point, in Degrees C, and Moisture in
Parts Per Million (PPM) are both displayed on the HPM screen below the
O2 reading.
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The Dew Point is on the right-hand side and will display from -8°C to -60°C
in 1°C steps. The moisture value is on the left-hand side and will read from
3000ppm down to 0ppm, from 3000 to 100ppm it will read in 100ppm
steps, from 100 to 0 it will read in 25ppm steps.
The screen colours for the High (Red, Mid (Yellow) and Low (Green)
alarms will only operate in conjunction with the pre-set Oxygen Alarm
Limits (please see section 2.6 for further information on how to set the
Oxygen Alarm Limits).
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2.5 Data Logging
Provides a convenient method of recording the O2 level displayed on the
HPM screen together with the time and date. To use this mode:
1Switch unit on.
2Select ‘Log 1’ mode.
3Start the sampling of the purge gas and allow to stabilise.
4Press the ‘Log’ button while gas is owing to record the data.
2.5.1 Log 1
Measured Oxygen Values can be logged to the HPM units’ internal
memory using the logging facility.
Recorded data can be downloaded from the unit using the USB
connection. Data can be directly imported into the data viewing and
reporting software included with the HPM. There are three modes for data
logging:
Log 1 Logs on-screen results.
Log 2 Logs data over a set period, taking a reading every 1 second.
Log 3 Logs data at regular intervals, pre-set by the user.
To set up and select the required logging mode, rst press and hold the
‘Reset’button for three seconds to enter the ‘Setup’screen. Press the ‘Up’
button to enter the logging options screen. Use the ‘Log’ button to scroll
through the three dierent mode options. To change the logging time in
modes 2 and 3, use the ‘Up’and ‘Down’buttons. Once selected, press the
‘Reset’ button twice to return to the main screen.
NB: This mode provides a quick, ‘screen print’ of results.
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For long periods of purge monitoring, the HPM battery charger can be
connected. Depending on the type of logging required, use ‘Log 2’ or ‘Log
3’.
2.5.2 Log 2
The HPM will start logging when the ‘Log’ button is pressed and will stop
logging once the pre-set time has been reached, or ‘Reset’ is pressed.
2.5.3 Log 3
The HPM will start logging as soon as the ‘Log’ button is pressed and will
continue logging at the set intervals until the ‘Log’button is pressed again.
2.6 Limits
The HPM is equipped with a visual warning system to show when the O2
concentration is at an acceptable level. The ‘Limits’ setup screen allows
the user to pre-set the thresholds which trigger the warning system to
operate.
The ‘High limit’ screen will be red when the reading is above the set level.
If readings are between the set ‘High limit’ and the ‘Low limit’, the screen
will be yellow.
When readings drop below the set ‘Low limit’, the screen will be green.
To set the limit level rst enter the ‘Setup’ screen by pressing and holding
the ‘Reset’ Button.
Press the ‘Down’ button to enter the ‘Limits Setup’ screen.
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Use the ‘Up’ and Down’ buttons to set the limit values; press and hold the
selected button to increase the speed of change.
Press the ‘Log’ button to toggle between the ‘High’ limit and ‘Low’ limit.
Once the Limits have been set to the required levels press the ‘Reset’
button to Exit the Setup screen and save the limit levels. Press the ‘Reset’
button a second time to exit the ‘Setup’ screen and return to the main
system O2 monitoring and operational screen.
2.7 Data viewing and reporting
To view the recorded data on a PC, connect the HPM using the USB cable
provided.
The HPM unit will display the following screen whilst it is connected:
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All log les are stored under folders labelled by the date - day, month,
year, i.e. 01042019. Open one of the folders to view the log les for that
day.
When the HPM 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 HPM les.
2.8 Viewing logged les
LOG.CSV contains all screen prints taken whilst in ‘Log 1’ mode.
.TXT contains all logs while in ‘Log 2’ and ‘Log 3’ mode. Each
‘.TXT’ le is labelled using the time the log was started –
hours (hh), minutes (mm) and seconds (ss).
2.9 Transferring logged les
TVC provide MS-Excel templates which are used to open the HPM les
and display the logged gas in an MS-Excel report.
2.10 Removing logged les
Files on the HPM are like any normal PC les; this means you can store,
remove or delete them as you normally would.
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2.11 Changing measured units or date and time
The HPM should be factory-set to measure in either Metric or Imperial
units, however, should this need to be adjusted this can be done via a
computer.
When the HPM is connected to your 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 HPM les.
2.12 Field calibration
The HPM is factory calibrated, however, additional eld calibration is
possible to maintain optimum operation.
To perform the eld calibration, an O2-free gas, e.g. pure Argon or pure
Nitrogen, should be purged through the system. The purge should be run
for at least ve minutes before the eld calibration is performed. The HPM
should be run as per a normal test, starting the analysis with the ‘Down’
button.
The date and time can be adjusted using this also (Item 5, above).
Follow the instructions and ensure that the correct measurement units’
box is ticked (Item 4, above).
Double-click on the le ‘TVC-Handheld-Date-Setter.exe’. The following
software window will open on your PC.
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After the purging gas has been run for ve minutes, while the gas is still
running, press and hold the ‘Up’ button until the screen shows ‘Zero
Complete’. Release the ‘Up’button. The eld calibration is now complete,
and the purge gas can be removed.
NB: Running a eld calibration on a gas mix containing O2 and/or
CO2 will cause the measured gases to be inaccurate! If this occurs,
the eld calibration should be run again on the appropriate gas.
It is also possible to delete a bad eld calibration by pressing and holding
the ‘Down’ button until the screen displays ‘Zero reset’.
It is recommended that a eld calibration is run once per week, or before
use, particularly if the HPM has not been used for a while or the operating
environment has changed since the HPM’s last use. If in doubt, run a new
eld calibration.
3.0 Battery charging
The HPM uses a rechargeable 7.2 Volt Lithium-Ion battery which lasts for
approximately eight to ten hours. When the battery level drops so either
the battery icon in the top right-hand side of the display shows a red bar
or no bar, i.e. reaching 0%, the HPM should be recharged.
NB: Charge the HPM using the supplied battery charger only!
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Ready LED Error LED Mode
O O Battery not connected.
Flashing O Battery charging.
On On Battery charged.
Any On A problem has occurred with the battery of
charger; consult TVC or your agent for
assistance.
Insert the battery charger plug into the charging input socket. Connect the
battery charger to a suitable mains supply. The HPM battery will take
around two hours to fully recharge and should be disconnected from the
battery charger once fully charged.
The following details the charge cycle and LED indications for the HPM
battery charger:
4.0 Additional information
4.1 Specication
NB: The HPM is not designed to measure any concentrations of O2
greater than 25%! Using the HPM on higher O2% mixes is not
approved!
Range 0 – 25% O2
Accuracy ±5% RDG (reading) ± 1 Digit
Transducer Type Multiple
Battery Rechargeable 7.2 Volt Lithium-Ion
O2 measurement range:
0.01% - 20.9% (HPM-01)
0 ppm – 1200ppm / 0.0005% - 20.9% (HPM-02)
As with any measurement equipment, the analysis pod requires time to
achieve an accurate measurement. The T95 time is 120 seconds.
The HPM also requires time to stabilise its sensors to the operating
environment. Large uctuations on temperature, air pressure and
humidity can aect the accuracy of the HPM; see the Section 2.12 for
more details.
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To meet our obligations under the WEEE directive, we have
a collection point for the recycling of this product once it has
reached the end of its normal working life. In these
circumstances, please contact us for further instructions.
For further information on equipment calibration or disposal
please contact TVC.
All HPM meters are supplied with valid and traceable 12-month calibration
certication.
TVC recommend that the HPM unit is returned to TVC, or a TVC-
approved agent, for recalibration and service annually.
4.2 Calibration
4.3 Disposal
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