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8    DETECTOR CARE

Handling/Transport

Avoid placing stress on the battery cable:

• 

Never lift the detector by the battery cable.

• 

Never hang the detector by the battery cable.

• 

Never stand the detector upside-down with the weight of the detector on 
the battery cable.

When transporting the Impulse AQ Limited, either dismantle and place in a padded 
detector bag or lay in a horizontal position. Avoid placing other items on top of the 
detector. Never leave the detector in a vehicle where it can be subject to extreme 
heat.

Storage

Store in a dry place and avoid extreme temperatures. If the detector has been 
exposed to excessive heat, it is recommended to let it to cool down before switching 
it on. We recommend storing at room temperature to preserve battery capacity. 
When storing the detector, charge the batteries completely before storage. If storing 
for a prolonged period of time, recharge the batteries occasionally to preserve battery 
capacity. 

Cleaning

After any water hunting or operation near salt water, 

thoroughly rinse with fresh 

water

. Compress the headphone ear pads to squeeze out excess water. After 

rinsing, allow the detector to completely dry out before storing. If using a coil cover 
occasionally remove the cover and clean out any accumulated sand. 

If salt water and/or sand get inside any one of the connectors: 

• 

Turn off power to detector immediately.

• 

Rinse the connector thoroughly with fresh water.

• 

Use a small brush with soft fibers, such as a toothbrush, to dislodge any 
foreign material (do not use a wire brush of any type).

• 

Allow the connector to dry thoroughly before reconnecting.  You can 
facilitate drying by blowing air into the connector, or you can place the 
power cable, and/or battery, in a plastic bag with white rice overnight (the 
rice will absorb any moisture).

Summary of Contents for iMpulse AQ Limited

Page 1: ......

Page 2: ...c sand It is designed for beach hunting wading and shallow water treasure hunting Each detector is submersion tested at 1 meter for 4 hours Happy Hunting from Fisher Research Labs Important Features H...

Page 3: ...ly by Fisher Research Labs Any attempt to modify repair or open the sealed enclosure will void the manufacturer s warranty Operating Principle Pulse Induction Pulse Frequency All Metal Mode 4 02kHz 4...

Page 4: ...BOX 5 2 BATTERY 6 3 INITIAL ASSEMBLY 7 4 ASSEMBLY 8 5 QUICK START 13 6 USER CONTROLS 15 7 SEARCH TIPS 23 8 DETECTOR CARE 26 9 TROUBLESHOOTING 30 10 COMPLIANCE 31 11 CODE OF ETHICS 32 12 2 YEAR LIMITED...

Page 5: ...owing preassembled components are in the box Figure 1 Detector Components A Upper Assembly B Lower Assembly with 12 Searchcoil C Headphones D Owner s Manual E Components Box E1 Power Cable E2 Charger...

Page 6: ...Pack may be fully charged even when the light continues to illuminate red After approximately 5 hours the Battery Pack will be fully charged CAUTION Please plug in AC power first then connect the bat...

Page 7: ...careful to avoid damaging the Power Cable and battery pack connector 1 Do not rest the rear of Upper Assembly A on any hard surfaces 2 Do not hold or grab the detector by the Power Cable Power Cable...

Page 8: ...ard until the silver button locates in the desired hole 6 Adjust Lower Assembly Tube B to a length that lets you maintain a comfortable upright posture with your arm relaxed to your side and the searc...

Page 9: ...ector in your hand with the Wide Notch pointed upward figure 5 2 Push in connector to seat If it doesn t seat rotate slightly left and right until it seats 3 Turn the Locking Ring clockwise until it l...

Page 10: ...d Headphones 10 ASSEMBLY Continued Connect Power Cable to Tube 1 Go into well lit area 2 Push lower assembly to shortest detector length possible 3 Stand detector up with control housing against the w...

Page 11: ...he connector protruding from the tube figure 9 6 Push Power Cable down onto connector and feel it seat 7 Turn outer knurled ring clockwise to thread on the connector figure 10 8 Tighten very firmly wi...

Page 12: ...Hold the Power Cable upright with one hand with other hand turn outer knurled ring clockwise to thread on the connector figure 11 4 Tighten very firmly with fingers Connect Headphones 1 Hold cable co...

Page 13: ...refer to EMI noise section below 6 Happy Hunting Underwater Operation Same as Basic Operation except Delay 11 5 s Threshold and or Volume may need to be increased if headphones are submerged Maximizi...

Page 14: ...y an uneven threshold tone in the All Metal mode turn the Mode control to the Batt Freq position and then rotate the Pulse Freq control to find the quietest setting Return the Mode control to the desi...

Page 15: ...Reject control determines the crossover point for the two tones Mute Low conductors induce a high tone iron and high conductors are muted again the Reject control setting determines the crossover poi...

Page 16: ...rence from other electromagnetic sources such as radio stations microwaves short waves electric fences power lines or other nearby metal detectors This interference is recognizable as a warbling or re...

Page 17: ...a single high tone however audio anomalies allow an experienced operator to identify some types of targets such as Nails hairpins and other elongated shapes produce double beeps when the coil is swep...

Page 18: ...ally be rejected may produce a short high tone chirp This and other audio anomalies can assist in identifying targets Because Mute mode eliminates the low tone responses it tends to be smoother than T...

Page 19: ...ed Volume Control The Volume control adjusts the loudness of all audio responses There is a trade off between a setting high enough to hear a faint deep target but not so high that a strong shallow ta...

Page 20: ...S AUTO TUNE SPEED Control Normally the coil must be in motion to detect targets If you stop directly over a target the detector will retune itself and the target response will cease The ATS control se...

Page 21: ...Choose Tone Mute or Volcanic Sand mode 2 Set the Reject control to 0 and the ATS to 8 3 Put the reference iron target on the ground in horizontal position 4 Swing the coil over the target at a height...

Page 22: ...nail responds as follows a In Tone mode the iron response is mostly low tone with some minor high tone mixed in b In Mute mode the iron response is mostly silent with some minor high tone breaking th...

Page 23: ...p using an ATS of 8 s or lower Surf Zone If you are in the active surf with the coil in and out of the water then the salt problem is magnified and 8 s is likely the minimum delay that will offer reas...

Page 24: ...ection but double response in the other likely a nail or other long ferrous target However a coin or ring buried on edge can also produce this response Double response in both directions likely a smal...

Page 25: ...PI detectors the Impulse AQ Limited can detect most gold targets within the category of low conductors Coins can also occupy a continuum of conductivities but many especially those with high silver c...

Page 26: ...harge the batteries completely before storage If storing for a prolonged period of time recharge the batteries occasionally to preserve battery capacity Cleaning After any water hunting or operation n...

Page 27: ...er the fork is aligned over the coil ears the Hex Insert is pushed through the holes on each side of the fork from inside to outside to hold the fork of the shaft to the coil 3 Finally the Coil Knob A...

Page 28: ...Strain Relief The Coil Strain Relief is located at the front of the coil in front of the lower stem fork It is positioned here to prevent interference with the lower tube when the detector is laid in...

Page 29: ...talled on the detector or it can be removed and charged 2 Loosen or tighten the two knobs to detach or install 3 The Battery Pack slides through two ring guides and reaches a stop on the rear ring gui...

Page 30: ...your sweeps Underwater Wet Sand 1 Reduce swing speed 2 If the problem persists change the swinging direction 3 If the problem persists increase the pulse delay between 10 s and 11 5 s 4 If the proble...

Page 31: ...ons These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate rad...

Page 32: ...emove and dispose of any and all trash and litter found Appreciate and protect our inheritance of natural resources wildlife and private property Act as an ambassador for all treasure hunters Use thou...

Page 33: ...uired to make a claim under this warranty Liability under this warranty is limited to replacing or repairing at our option the metal detector returned shipping cost prepaid to Fisher Research Labs Shi...

Page 34: ...tery packs contact Fisher Research Labs Fisher Padded Carry Bag Rugged double stitched construction Includes handy Exterior pocket for extra batteries or small Accessories 103693000C 45 00 Fisher Batt...

Page 35: ...35...

Page 36: ...MIMPULSE AQ R1 072220...

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