Markes International C-HLD User manual

Helium leak detector
QUI-1166
Version 1
August 2019
www.markes.com
Instruction for use
Product reference:
Helium Leak Detector, with USB charger C-HLD

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Contents
1. Introduction .............................................................3
1.1 Important safety warnings ......................................3
1.2 Warnings....................................................................3
1.3 Operational notices ..................................................4
2. Components.............................................................5
3. Preparation ..............................................................6
4. Detector operation ..................................................6
5. Storage .....................................................................8
6. Setting parameters ................................................9
6.1 Parameter setting items and contents ...................9
6.2 Flow diagram of parameter settings .......................10
7. Specications..........................................................11
8. Contact details ........................................................11

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1. Introduction
This portable, highly sensitive helium leak detector for TD–GC systems provides the
accurate, sensitive and rapid detection of carrier gas leaks that is essential for
TD–GC troubleshooting.
Through a dual system consisting of an LCD display and an audible alarm, this
qualitative device clearly indicates gas leaks, and is powered by rechargeable
batteries for ease of portability.
The detector is suitable for analytical equipment that utilizes helium as a carrier gas
and is capable of detecting gases that have a different thermal conductivity than air.
1.1 Important safety warnings
Make sure you follow the precautionary notices presented in this manual. Safety and
other special notices appear in boxes and include the following.
WARNING This is the general warning safety symbol and safety alert word to
prevent actions that could cause personal injury.
CAUTION Highlights actions that may cause product damage. We use it to
highlight information necessary to prevent damage to hardware,
software, invalid test results, or to information that is critical for optimal
system performance.
NOTES  Emphasizesimportantinformationaboutaspecictask.
1.2 Warnings
WARNING This detector is not explosion-proof equipment. Do not use the detector
inareasatriskofre,explosionorlargeammablegasleaks.
WARNING  Thedeviceisnotasafetyguardagainsthazardousorammablegases.
WARNING Do not open the detector’s body except when replacing a battery.
WARNING Do not use the supplied recharge micro USB cable for other equipment.
CAUTION When removing or attaching the recharger to the detector, ensure the
power of the detector is OFF.

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1.3 Operational notices
WARNING DO NOT use the detector to detect corrosive gases.
WARNING DO NOT use the detector in environments that are contaminated with
dust or combustible fumes.
WARNING DO NOTusethedetectoroutsideofthespeciedtemperaturerange
(10 to 40°C)
WARNING DO NOT expose the detector to shock.
WARNING Ensure the device is in a stable condition during operation.
WARNING DO NOT aspirate liquid samples. The detector has a sample gas line and
referencegasline;bothhaveltersttedbutthesearenoteffectivefor
liquid samples.
CAUTION  Whenusingthedetectorforammablegasleakages,makesurethereis
sufcientventilationintheroom.
CAUTION DO NOT block the tip of the sample probe and reference port. Please
take extra care not to press the sample probe against the object.
NOTES The sensitivity of the detector decreases when the surrounding contains
the leaking gas.
NOTES Wind can affect the sensitivity of the detector, so please be careful
when using outdoors.
NOTES The detector is not a quantitative device and therefore does not require
calibration. It was designed to detect leaks associated with laboratory
equipment.
NOTES  Decreaseofsensitivitycanbearesultoflterclogging.Ifthisoccurs,
pleasereplacethelteronthesampleorreferenceline.(Referto
instruction below).
NOTES The detector gives a positive response to water vapour. Skin vapour or
soapy water can therefore incorrectly be detected as gas leakage.

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2. Components
[1] FUNC/POWER key
Turning the power ON/OFF and selecting setting contents.
[2] ZERO/ENTER key
Adjusting zero balance and entering setting contents.
[3] LCD display
[4] LED indicators
Indicating leak level and battery level
[5] Reference Port
Inlet to aspirate ambient air
[6] Charging terminal
Connecting the charging terminal to a PC with supplied micro USB charging
cable to charge
[7] Battery Cover
[8] Strap eyelet
For attaching the supplied strap
[9] Samplingprobe(withinternallter)
For aspirating sample gas

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3. Preparation
Priortorstuse,orbeforeusingtheproductfollowinganextendedperiodofdisuse,
ensure the device battery is fully charged.
WARNING DO NOT turn on the power of the detector while the battery is being
recharged.
After recharging, allow the detector 30 minutes to stabilize its
temperature before use. The charging terminal cap should be attached,
except for when charging.
NOTES The detector may become warm during charging. This is normal and
does not indicate a malfunction.
NOTES Use of the LED in addition to LCD display will deplete the battery.
4. Detector operation
[1] Topoweron,presstheFUNC/POWERkeyforapproximately1second.The
detector takes approximately 25 seconds to warm up at standard range (Std)
and 90 seconds at high range (Hi).
Warming-up display
(RangeStd.) 25 – second countdown
PressZERO/ENTERkeytoskip
R_Std
Warm up
25
Skip:ENT

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[2] After warm-up, the standard display is shown.
Standard display
(RangeStd.) (SimilardisplayedatRangeHi.)
➊ ➌
➍
➋
➊Range
R_Std: StandardSensitivityRange
R_Hi: HighSensitivityRange(10timesmoresensitivethan 
standard range)
➋Battery indicator
Battery indicator shows the battery charge levels in 3 levels:
Battery level 3: Full charge (more than 50% is left)
Battery level 2: Low charge (about 20–30% left)
Battery level 1: Very low charge, charging is required
(battery survival time is about 10 min.)
➌Leakindicator(LCDdisplay)
When a leak is detected, the detector displays bar graphs. The number of
bar graphs indicated the level of gas leak. (Max. 8 high intensity of bar
graphs).
ZEROpointdisplay: Blinkingbar,1sttotheleft.
Leak display: Indicates the gas leak, which has higher thermal
conductivity than air
Indicates the gas leak, which has lower thermal
conductivity than air
➍Leakindicator(LEDindicator)
When a gas leak is detected, the LED lights from the bottom left to top
and then from the bottom right to top (maximum 8 blocks).
The LED can be used in addition to the LCD display. This can be selected
by setting parameters.
ZEROpointdisplay:ThegreenorredLEDblinkswhenthedetector
becomes stable near Zero point.
Leakdisplay: Redlight:  Indicatesthegasleak,whichhashigher
thermal conductivity than air
Green light: Indicates the gas leak, which has lower
thermal conductivity than air

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[3] First, check the stability at zero point.
& on the left will be blinking alternately when the detector becomes
stable.Whentheleakindicatorisdisplayedwithoutleakage,pressZERO/
ENTERkeytoadjustthezerobalance.Underconditionssuchasuctuationof
temperature or humidity, the detector needs zero point adjustment for both
the LED and LCD display.
Out of zero point ZEROadjust
[4] Place the sample probe tip near the gas connection to leak check.
One gas leak mark indicates there may or may not be gas leaks, especially on
a high range.
Two or more gas leak marks indicate there is a gas leak.
More than three gas leak marks are indicated, and the audible alarm sounds
when the buzzer function is ON.
[5] Turn off the detector after use.
Auto Power Off function ON: The detector is automatically turned off 10min.
after use.
AutoPowerOfffunctionOFF:HolddownFUNC/POWERkeyfor3secondsto
turn the power OFF.
5. Storage
The detector should be kept in a clean/dry environment.

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6. Setting parameters
6.1 Parameter setting items and contents
Parameter setting item Content
Range
Sets range
Std: Standard sensitivity range
Hi: High sensitivity range
Buzzer
Sets the buzzer to alarm
ON: Use (More than 3 gas leak marks)
OFF: Not use
LED
Sets LED in combination with LCD display
ON: Use
OFF: Not use
Backlight
Sets LCD backlight
ON: Use
OFF: Not use
A.P .Off
Sets auto power off
ON: Use
OFF: Not use

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6.2 Flow diagram of parameter settings
: At blinking (Selecting) condition