Fisher Power Screwdriver XLT 30 User Manual

XLT-30  
Acou stica l Lea k Detector  
Op e ra ting Ma nua l  
F I S H E R R E S E A R C H L A B O R A T O R Y  
 
INTRODUCTION  
Fishe r Re se a rc h La b o ra to ry ha s a lwa ys b e e n a le a d e r in the fie ld  
o f a c o ustic a l le a k d e te c tio n. Fro m the e a rly LT-10 thro ug h the  
XLT-20, hig h q ua lity sound a m p lific a tion ha s b e e n synonym ous with  
the na m e Fishe r.  
Fishe rs XLT-30 ta ke s le a k d e te c tio n to a ne w le ve l. Ultra se nsitive  
sound m ic rop hone s, c om b ine d with a non-d istortion a m p lific a tion  
syste m a nd c rysta l c le a r a ud io he a d p ho ne s m a ke the XLT-30 the  
le a k d e te c to r d e stin e d to se t n e w sta n d a rd s fo r th e le a k  
p ro fe ssio na l.  
1
1
 
INSTRUMENT SET  
1. Control Box  
All listening and filtering controls for the XLT-30 are contained in this  
sturdy housing. The function of each control is described in the section  
entitled Faceplate and Controls.  
2. Big Foot Prob e  
Also known as the Ground Microphone, this probe is to be used on hard  
surfaces, concrete, asphalt, tile, etc. A flexible rubber shield helps prevent  
outside sounds from interfering with the sounds from the buried pipe. De-  
pressing the red button near the handle will Mute the audio from the probe  
to suppress loud sounds when the probe is moved.  
3. Hyd rop honic Cylind e r Prob e  
This probe is a direct contact probe designed to make direct connection to  
the pipe, or any portion of the pipe that is accessible. Used in any combina-  
tion of Sound Rods with the T-Handle, pipes can be accessed to distances  
up to nearly 6 feet away.  
Another feature of the Cylinder Probe is the ability to listen to pipe noise in  
pipes that are buried in turf, or soft surfaces. Accurate pipe location is  
essential for the placement of the Ground Rods as close to the pipe as pos-  
sible.  
2
 
INSTRUMENT SET  
On top of the Cylinder Probe is a three position toggle switch for Mute,  
Listen, and Momentary Listen. As with all Mute controls, learn to use  
them wisely.  
When tightening the sounds rods to the Hydrophonic Probe, secure the con-  
nector with a wrench as to not let it twist. Twisting of that connector could  
damage wiring on the inside of the probe.  
4. Sound Rod s  
Two different sizes are included with the XLT-30. One (1) 4 inch rod and  
three (3) 24 inch rods give the user various lengths for direct or indirect  
contact to pipes.  
5. T-Ha nd le  
This handle is used primarily with the Cylinder Probe and the sound rods.  
6. He a d p hone s  
These headphones are designed to deliver the clearest sound with the least  
distortion. Unplugging the headphones will turn off the XLT-30. When  
the XLT-30 is turned Off, any modifications to Volume, Notch, and Filter  
will return to the factory presets.  
7. Prob e Ca b le  
This cable attaches at the back of the Control Housing to any of the various  
probes. Make sure the jack is fully inserted and the lock nut is hand tightend.  
8. Ca rrying Ca se  
Each unit comes with a strong plastic carrying case with foam compart-  
ments to store all parts of the XLT-30.  
9. Ca rrying Stra p / Housing Mounting Bra c ke t  
The attachment system for the XLT-30 consists of a plastic mounting bracket  
that slides from the bottom of the control housing up to the bezel around  
the faceplate. There are two slots for attaching an adjustable strap that  
hangs around the neck of the user.  
10. Little Foot Asse m b ly (Ac c e ssory)  
About the size of a computer mouse, this small handheld probe designed for  
areas that the Big Foot Probe can not fit into. The Little Foot assembly is  
normally used for leak detection inside buildings. Mute is activated by  
depressing button in front of Little Foot Assembly.  
3
 
CONTROL PANEL  
POWER  
This pad turns the XLT-30 On or Off. When the instrument is turned Off,  
all settings, or modifications to settings default to the preset factory set-  
tings.  
LIGHT  
Depress pad to turn the back light On or Off. Prolonged use of the Back  
Light will have minimal effect on the battery life of the XLT-30.  
VOLUME  
Depress pad to modify the Volume of the XLT-30. The arrow keys (Up  
arrow/Down arrow) increase or decrease the Volume to the headphones.  
NOTCH  
This control allows the user to mask or reject a small range of frequency  
response. Its purpose is to eliminate a sound (i. e. motor, humming, fans,  
etc.) that may be interfering with the leak sound. The Notch setting can be  
moved with the Arrow Keys.  
FILTER  
The XLT-30 ha s fo ur d iffe re nt filte ring m o d e s.  
AL (All Frequencies) – This is the No Filter feature of the XLT-30.  
No modifications to the signal can be made with the Arrow Keys. Fre-  
quency range of the All Frequency setting is from 60 Hz to 6 kHz.  
4
 
CONTROL PANEL  
(The following filte r mode s ha ve a fre que nc y ra nge from 60 Hz to 2.4 kHz)  
HI (High Range) – This filtering mode allows the user to adjust the  
response in the higher areas of the frequency range. Use the Arrow keys to  
increase or decrease this frequency response range.  
LO (Low Range) – Similar to the previous filter mode, the Low Pass  
filter allows the user to listen to the lower areas of the frequency range.  
The Arrow keys are used to increase or decrease this frequency response  
range.  
FC (Frequency Choice) – This filter could also be called Frequency  
Select. This mode allows tuning to the frequency that gives the user the  
best response. The Arrow keys are used to move the cursor, selecting a  
narrow frequency band of choice  
HOLD/ MUTE  
This d ua l p urp o se b utto n is b o th a Mute c o ntro l a nd a Pe a k Ho ld  
Re se t c o ntro l.  
Mute – As the name applies, muting disengages the sound to the  
user. There is also a control on all listening microphones. Learn to use this  
control to prevent excessive noise to your ears when the probes are moved.  
Hold – The display of the XLT-30 will show the highest sound level  
recorded. This reading can be reset by depressing this pad. Resetting the  
Peak Hold clears earlier readings of the Peak sound.  
Arrow Ke ys  
These keys allow features of the XLT-30 to be modified.  
RESUME  
After any modification has been made to the XLT-30 (VOLUME, NOTCH,  
or FILTER), depressing the RESUME will return the display screen back  
to a Meter function (Sound Graph).  
5
 
OPERATING INSTRUCTIONS  
Se t Up  
1. Assemble Control Housing, Headset, and your choice of listening probe .  
The headset must be plugged in for the XLT-30 to operate.  
2. Depress POWER pad to turn On the XLT-30. The XLT-30 goes through  
a five second warm up before the touch pads are functional. During this  
time, the Display Screen gives information of Battery Level. A reading of  
68 or below will activate the Low Battery” indicator. The XLT-30 does  
have a usage buffer between the Low Battery” indicator and complete sys-  
tem shut down to allow you to complete a job.  
3. The XLT-30 always turns On to the default settings. Volume is at the  
Medium setting, Filter is in the All Pass (no filter) mode, and the Notch  
Control is at the Midway point. The display screen will show the sound  
intensity in a bar graph form (Sound Graph) and two digit display.  
4. Familiarize yourself where the Mute Buttons (and pad) are. Remember  
to Mute the XLT-30 when moving any probe.  
5. Depress the VOLUME pad to modify headset volume. Use the ARROW  
pads to increase or decrease the volume. The display screen will show the  
volume level in a graph form. Depress the RESUME pad to exit Volume  
modification and return the Display Screen to the Sound Graph function.  
6. Begin your leak detection search.  
Mod ific a tions During Le a k Se a rc h  
So m e le a ks a re sm a ll in size , a nd unre c o g niza b le , o r c o nd itio ns  
a re suc h tha t ve ry little le a k so und c a n b e re c o g nize d , so yo u  
m a y ne e d to m a ke c ha ng e s to the Filte r(s) in o rd e r to he a r le a ks.  
De p e nd ing up o n the typ e o f p ip e c o m p o sitio n a nd so il (g ro und )  
typ e , d iffe re nt filte r se tting s will inc re a se yo ur a b ility to he a r the  
le a k so und .  
Ad justm e nt to the Filte r is d one b y d e p re ssing the FILTER p a d whic h  
will a llo w yo u to sc ro ll thro ug h fo ur d iffe re nt filte r typ e s. Fre q ue nc y  
ra ng e m o d ific a tio ns c a n b e m a d e to the HI, LO, a nd FC filte rs. As  
yo u a re c ho o sing yo ur filte r, the d isp la y sc re e n will g ive a visua l  
d isp la y o f the filte r typ e b e ing use d , a nd the fre q ue nc y ra ng e o f  
tha t filte r. Afte r yo ur se le c tio n a nd m o d ific a tio n is m a d e , d e p re ss  
the RESUME p a d to re turn to the So und Gra p h func tio n o f the  
d isp la y sc re e n.  
6
 
OPERATING INSTRUCTIONS  
Use of the Notc h Filte r  
Oc c a siona lly, you m a y c om e a c ross a sound tha t m a y b e m a sking  
o r c o ve ring yo ur a b ility to a d e q ua te ly he a r a ny le a ks. This m a y  
b e c a use d b y ne a rb y m o to rs, fa ns, o r m a ny o the r a nno ya nc e s.  
(Un fo rtu n a te ly, th e m o st c o m m o n a re so u n d s c a u se d b y  
a utom ob ile s a nd tra ffic ). The XLT-30 ha s a Notc h, or re je c t fe a ture ,  
tha t will a ssist in e lim ina ting tha t so und fro m yo ur fre q ue nc y ra ng e .  
De p re ss the NOTCH p a d , a nd use the ARROW p a d s to m o ve the  
c urso r to the p o int whe re the a nno ying so und is e lim ina te d o r a t  
its we a ke st. De p re ss the RESUME p a d to se t the No tc h func tio n.  
(Hint: De p re ss the FILTER p a d to g o d ire c tly to the FILTER m o d e .  
No w yo u c a n c ho o se the typ e o f Filte r yo u wish to use AND still  
ha ve the a nno ying so und No tc he d ).  
7
 
SPECIFICATIONS  
Su bject to im p r ovem en t or m od ifica tion w ith ou t n otice.  
Op e ra ting fre q ue nc y Ra ng e  
All p a ss m o d e  
Filte r m o d e  
60Hz - 6kHz  
60Hz - 2.4kHz  
Filte r Typ e s:  
Ind e p e nd e nt no tc h filte r  
Lo wp a ss, Hig hp a ss o r Ba nd p a ss  
95d B  
G a in  
Outp ut Ind ic a tio ns:  
Aud io Hig h p e rfo rm a nc e he a d p ho ne s (64 o hm s)  
Visua l LCD b a rg ra p h a nd 2-d ig it num e ric d isp la y  
Auto m a tic  
Ba tte ry Te st  
Ba tte ry Typ e  
Ba tte ry Life  
We ig ht  
Two 9 Vo lt a lka line  
50 Ho urs (a p p ro xim a te )  
Ho using 1.2 lb s.  
Big fo o t Se nso r 4.5 lb s.  
Ca se Dim e nsio ns  
8-1/ 4" x 8-1/ 2" x 32-1/ 2"  
ACCESSORIES  
Standard Equipment:  
Hard Carrying Case  
Operation Manual  
Optional Equipment:  
Little Foot Assembly  
F ish er Resea r ch La bor a tor y d oes n ot w a r r a n t su ita bility to sp ecific u se.  
F ish er Resea r ch La bor a tor y sh a ll in n o even t be lia ble for a n y d ir ect, in cid en ta l,  
con sequ en tia l or in d ir ect d a m a ges.  
8
 
 
Q U A LI TY  
Fishe r d e te c to rs a re re no wne d fo r the ir q ua lity.  
Ea c h d e te c to r is ha nd c ra fte d in the USA with p rid e  
P E R F O R M A N C E  
The wo rld wid e und e rg ro und utility ind ustry re lys o n Fishe r.  
Our instrum e nts a re d ura b le , d e p e nd a b le , a nd se a rc h d e e p e r..  
R E P U TA TI O N  
Fishe r p ro d uc e d the first p a te nte d m e ta l d e te c to r in 1931. Fo r  
o ve r 70 ye a rs, the Fishe r lo g o ha s b e e n a m a rk o f e xc e lle nc e .  
2 YEAR W A R R A N TY  
Fishe r b e lie ve s in the p ro d uc ts we p ro d uc e a nd b a c ks this b e lie f  
with a 2 ye a r wa rra nty o n a ll o f o ur ind ustria l instrum e nts.  
Wa rra nty m a y va ry o utsid e o f the Unite d Sta te s.  
Se e yo ur d e a le r fo r d e ta ils  
S E R V I C E  
Fishe r is c o m m itte d to p ro vid ing yo u, o ur va lue d c usto m e r, with  
sup e rio r se rvic e . Ea c h a nd e ve ry instrum e nt is rig id ly te ste d a nd  
c a re fully insp e c te d d uring a sse m b ly a nd b e fo re ship m e nt.  
Should you ha ve a ny q ue stions or p rob le m s, c onta c t:  
FISHER RESEARC H LABO RATO RY  
200 We st Willm o tt Ro a d .,  
Lo s Ba no s, Ca lifo rnia 93635  
Te l 209.826.3292 Fa x 209.826.0416  
www.fishe rla b .c o m  
e m a il: info @fishe rla b .c o m  
for a d e a le r ne a r you  
1.800.M-SCOPE.1 1.800.672.6731  
 
FRL#8700721  

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