TVC HPM-01 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]
HPM
Hand-held Purge Monitor HPM-01 / HPM-02
Instruction Manual
V1.5

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 Specication 16
4.2 Calibration 17
4.3 Disposal 17

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24
3
5
1.0 Description
3
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
3
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4
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
identied 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 di󰀨erent 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.