Dielectric MGD-2002 Manuel utilisateur
Model MGD-2002
Multi Gas Leak Detector
Instruction manual
IB-417 REV. I PART NO. 84671
User Safety Warnings
IMPORTANT: Before operating the device for the first time, read all
of the following safety guidelines. To prevent personal injury, property
damage, or damage to the detector, operate it only in accordance with
these safety guidelines.
• Do not operate the device if it has been damaged. Contact SPX
Radiodetection for advice.
• Do not allow any part of this device to come in contact with an ener-
gized high voltage source. Injury or death may result.
•Do not disassemble the device as it will void your warranty. Repairs
should only be performed by qualified factory service personnel.
•Do not allow the Detector to draw up water. Water will adversely
affect the device's operation and will cause internal damage. Water
found inside the unit will void your warranty.
•Take sensible precautions to prevent the ingress of moisture when
using the detector in rain, snow or other adverse conditions. Although
the detector is somewhat water resistant, it is not waterproof. Do not
allow water to accumulate on the detector faceplate, as it could mi-
grate into the electronics.
•Do not use the probe tip to dig in the soil, or use it in any manner
other than as directed in this manual.
•Although this device will operate with a low battery voltage, do not
operate the detector when the battery indicator displays 1/4 battery
or less. False readings may occur when operated under this condi-
tion. Refer to pages 7 through 9 for instructions on how to recharge or
replace the battery.
•When charging: This unit should be in an indoor dry location.
•Do Not plug the battery in backwards. Circuit board damage will
result
CAUTION - Refer to accompanying information
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Table of Contents
Section Description Page
User safety warnings i
Table of contents ii
1.0 Specifications 1
2.0 List of kit contents 2
3.0 Unpacking your New MGD-2002 3
4.0 Tracer gas 4
4.1 Helium vs Hydrogen as a tracer gas
4.2 Other Gasses the MGD-2002 will react too
5.0 Assembling the MGD-2002 for use 5
6.0 Operation of the MGD-2002 6
6.1 Overview
6.2 Humidity vs Accuracy
6.3 Moisture filter
6.4 Power supplies
6.5 Charging the battery
6.6 Charging the battery using the universal power supply
6.7 Charging the battery from a 12VDC auto adaptor
6.8 Replacing the battery
6.9 Button function and operation
6.10 Liquid crystal display (LCD)
6.11 Display status icon
7.0 Tracer gas leak locating for piping systems 14
8.0 Leak locating for pressurized cables 21
9.0 Serial port (if equiped) 33
10.0 Maintenance 33
11.0 Calibration 35
12.0 Frequently asked questions (FAQ) 36
13.0 Troubleshooting 39
14.0 Service information 40
Warranty Back cover
1.0 Specications
Dimensions: (LxWxD) 13.3in x 4.9in x 3.3in
(33.7cm x 12.3cm x 8.3cm)
Weight: (MGD-2002 only) 3.1 lbs (1400 grams)
(Shipping) 15.0 lbs (6800 grams)
Temperature Range: +40°F to +110°F
(+4°C to +43°C)
Humidity Range: 20% RH to 50% RH
Sensitivity: (Min) 25 PPM
(Max) 100% (1,000,000 PPM)
(Increment) 25 PPM (0 to 20,000 PPM)
0.1% (2% to 100%)
Tracer gasses: Helium (He) / Hydrogen (H)
Resolution: (Low range) +/- 25 PPM
(High Range) +/- 0.2 %
Response Time: 15 Seconds (approx.)
Audio Out: Pulse Width Modulation
LCD: 128 Bit X 64 Bit Dot Matrix
with long-life backlight
Battery: (Voltage) 7.2 VDC
(Type) Nickel Metal Hydride
(Weight) 383 grams
(Run Time) 6-8 Hours Continuous
(Charging Cycles) 300 - 500
(Charging Volts) 9.5 - 14 VDC @ 2A
Power Supply: (AC Input) 110-240V, 1.6A, 60/50Hz
(Charger) (DC Output) 12V, 4.0A
Pump Volume: 1.05 Liters/Min (approx.)
0.85 to 1.00 L/min
0.75 to 0.85 L/min
0.60 to 0.70 L/min
Compliance CE
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2.0 List of kit contents
Description Part No.
1. MGD-2002 gas detector 79766
2. 12VDC Auto Adaptor charger 163-0005-01
3. Ground probe with Collection cup 90664
4. Spare moisture lter cartridge 83220
5. Sampling handle 83174
6. Needle probe 84165
7. Battery NiMH 82492
8. Sholder strap 300-0012-00
9. Backush connector 84972
10. 110-240 VAC universal AC charger 93642A
11. Carry case 84672
Optional equipment not included
• Headphones 882-0007
• European power cord 241-0003-00
• Serial port requires factory
installation
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3.0 Unpacking your New MGD-2002.
3.1 Upon delivery
1) Open the shipping package and inspect the MGD-2002 for
any physical damage that may have been caused during
shipping. Keep the packing material in case you ever need to
return the device to SPX Radiodetection.
NOTE: The Manufacturer’s warranty does not cover damage
caused in transit. You must notify your carrier immediately for
any damage claims.
2) Position the device face down to open the battery compart-
ment door. Remove the battery to expose the device informa-
tion placard. (The serial number is located under the bar-
code.)
3) Connect the battery plug to the main logic board. Close the
battery compartment door and secure with the quarter turn
fastener.
NOTE: Connecting the battery incorrectly even for a second
will destroy the circuit board.
4) First, plug the universal power supply into a convenient AC
wall outlet then plug the other end into the device.
NOTE: To ensure optimum battery working life, charge battery
for 2 hours before operating the MGD-2002 detector for the
first time. See page 7 for battery charging instructions.
5) Check the moisture cartridge filter and ensure it is blue in
color. Refer to page 34 for filter changing instructions.
6) Before switching the device on, connect either the needle
probe or ground probe to the handle assembly and then con-
nect the handle assembly to the detector using the quick con-
nect fitting on the end of the black tubing. Refer to page 5.
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4.0 Tracer Gas
4.1 Helium vs. Hydrogen as a tracer gas
The MGD-2002 is a Helium/Hydrogen detector calibrated to
detect “Helium”. However, it will indeed give readings if hydrogen
is present. As this detector is based on the thermal conductivity
of gasses and with Helium and Hydrogen being similar in this
regard the detector will not be able to tell the difference.
Helium is the preferred tracer gas. Helium is a noble gas and does
not react or combine with any other gas or substance. It is safe to
use in all types of leak locating at any concentration up to 100%.
Hydrogen is not generally present in higher quantities in
uncontrolled situations as it is very reactive and if in quantities
greater then 4% it is very ammable and even explosive. To use
it as a tracer gas you need to purchase it mixed to 4% or less
with the remainder being nitrogen. Thus, starting with an already
diluted tracer gas making it that much harder to nd as it dilutes
even further when you add it to the system being tested. (not
a problem when working with 100% helium) We certainly DO
NOT recommend Hydrogen be used as a tracer gas for these
reasons.
Note: It would take more then 20 tanks of 4% hydrogen mix to
equal the amount of traceable gas in one 100% helium tank.
Mixing the helium down to 4% is certainly an option and can be
done by adding compressed air to the system as it is being lled.
4.2 Other Gases the MGD-2002 will react to
When considering all other gasses there are some that would
normally present false reading when in high concentrations such
as CO, CO2 and Ozone (on a busy street) with helium detectors
using this above mentioned sensor type. However, we looked at
this situation based on our experience with older models of our
detectors and through the development of some patented lter
media combinations and custom software we have eliminated or
captured these gasses eliminating the majority of false readings.
Unfortunately methane even in very low concentrations can
cause the MGD-2002 to react but this is generally only seen
during certain environmental tests.
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5.0 Assembling the MGD-2002 for use.
When assembling the device, refer to the List of Kit Contents on
page 2 of this manual.
1. Clip the black sampling tube quick-release connector of the
sampling handle (5) onto the connector on end of the MGD-
2002 detector (1).
2. Attach either the needle probe (6) or the Ground probe (3):
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To attach the needle probe snap it into the quick connect
coupling of the sampling handle cap/adaptor.
-To attach the ground probe: Unscrew the cap/adaptor
from the sampling handle and screw the sampling handle
into the extendable ground probe (3). Do not overtighten
(Hand tight). Note: applying a small amount of silicone
based lubricant to the seal on both ends of the moisture
cartridge will improve its performance.
3. To extend the ground probe, press the lock button on the
sample probe and with it pressed, gently pull on the sample
collection cup. When the sample probe is at the required
length, release the lock button, ensuring it engages in a
locking position.
4. Turn the MGD-2002 on. The MGD-2002 will perform a self
check and zeroing routine (1 min approx). Youare now
ready to look for Helium/Hydrogen
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6.0 Operation of the MGD-2002
6.1 Overview
The MGD-2002 gas detector is a portable leak-locating and
pinpointing device that can be used in a multitude of pressurized
systems to detect both hydrogen and helium when used as a
tracer gas . Because they are both lighter than air, hydrogen
and helium penetrate small leakage points rapidly. The gasses
permeate through the densest soils and pavements quickly
enabling the leak to be pinpointed easily with the detector.
6.2 Humidity vs Accuracy
The MGD will function correctly at high relative humidity (RH)
levels of 50% or greater, but its accuracy and sensitivity may be
reduced. Lower humidity is prefered.
6.3 Moisture filter
The replaceable moisture cartridge filter removes much of the
moisture from the sample and is designed to enable users to
quickly asses the filter daily life-span by visual inspection. A new
dry cartridge will be bright blue in color, and is shown on page
7. The moisture cartridge will turn pink as it removes moisture
from the air. As it changes color, the filter cartridge is still within
its useful life, but will degrade further to a clear white color if
continually used in high humidity conditions or if water is present.
To maintain optimum filter performance we recommend that you
change it or clear it of moisture when the color changes to light
pink.
The useful life of the filter depends upon the relative humidity
(%RH) of the working environment. For example, on an average
dry day, the %RH is roughly 20%, and in this case the filter should
last between 4-6 hours. If the relative humidity increases to 50%
RH, the single cartridge might last only 2-3 hours. If the humidity
increases to between 50-90% RH, the filter may only last one
hour.
With the MGD-2002 field replaceable system, filters can be
changed within seconds, or cleared and reused within minutes.
Refer to page 34 for instructions on how to change the filter.
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The internal filtration material has a limited useful life, and S
PX
Radiodetection strongly recommends that the MGD is returned for
calibration once a year. During factory recalibration, the moisture
cartridges are cleared or replaced, and other filters have their filtra-
tion media changed. Refer to page 35 for a list of all the value-added
benefits that are included in a factory recalibration.
6.4 Power supplies
The MGD-2002 is powered by a replaceable, rechargeable nickel
metal hydride (NiMH) battery and comes supplied with a universal
AC/DC adapter, AC charging lead, and 12 volt DC charging lead
for use with a vehicle cigarette lighter socket.
6.5 Charging the battery
Charging from a completely dead battery will take approx 2 hours
and should last for approximately 6-8 hours of run time. While
charging, the battery will heat up and become warm. As the
sensor is sensitive to temperature changes it will be necessary
to wait approx 20 min for the battery temperature to return to
normal before using the device.
Note: It is not possible to use the MGD-2002 during battery
charging as the detection capability is automatically dis-
abled when the battery charger is plugged in.
Note:The battery is equipped with a temperature sensing
Spent Cartridge Dry Cartridge
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