The Tinker & Rasor Model AP VoltageRegulated Holiday is a portable, all-purpose electrical inspection instrumentwhich maintains a given inspection voltage in spite of the electrical loadon the circuit or the charge on the battery. It is recommended for useon any pipe diameter as well as on flat surfaces when such surfaces arecoated with a highly electrical resistance material, and when the surfacebeneath the coating is electrically conductive. The detector works equallywell on damp or dry surfaces, and is especially desirable where humid conditionsprevail. 
 
 

2.UNPACKING & INSPECTION

A. Open the carrying case and make noteof where the various accessories are located. To 
     ensure properstorage, repack accessories in the same manner when not in use. 

B. Inspection should be made upon receipt.If damage has occurred during shipment, file a 
     claim with thecarrier immediately. 

C. If it is necessary to contact your supplieror the manufacturer concerning damaged or 
     missing items,be sure to include the serial number, purchase order number, and invoice 
     number of theinstrument in question. 
 
 

3.CHECK-OUT INSTRUCTIONS

A. Remove all accessories from the carryingcase with the exception of the battery charger. 
     (The instrumentis shipped with two batteries, one of which us already in the unit). 

B. Make sure that the detector is turnedOFF. 

C. Using the VOLTAGE SELECTION TABLE onthe back panel, select the specific voltage 
     required Unscrewthe protective cap on the SELECTOR and use a screwdriver to turn the 
     switch to theHI or LO position. Replace black plastic cap cover. Use same procedureto 
     adjust voltagesettings. 
 

     CAUTION:Alwayschange HI-LO switch with detector turned OFF. 
 

D. Connect high voltage cable and groundcable to detector (insert and twist clockwise). 

E. Attach probe handle to voltage cable. 

F. Attach electrode to the voltage probeassembly and apply to the structure to be inspected.
     The electrodeshould always make intimate contact with the surface under inspection. 

G. The Model AP Holiday Detector is nowready to operate. 
 
 

4.OPERATING METHODS

A good ground return system for both thepipe and the detector will always provide the best and most reliable inspection.The pipe to be inspected must be grounded from the bare pipe to earth atsome point along the pipe. If individual joints of the pipe are to be inspectedthat are not electrically connected, each joint must be grounded. 

The speed of the electrodes travel alongthe pipe should never be excessive, since faulty inspection may result.Occasional checks of the detector operation should be made, particularlyif no holidays are being found. this can be accomplished by testing forthe spark and signal at the edge of the coating where bare pipe exists,or by touching the probe end to the bare pipe and noting the length ofthe spark and the signal effectiveness. 

If the signal does not occur when the sparkdischarges from the electrode into a known holiday, the ground return (i.e.the path between the metallic pipe and earth and the earth to the groundtrail of the detector) is of high resistance. In this case, a better groundis required and a direct connection between the metal pipe and the groundwire may be necessary. This type of grounding is extremely uncommon unlessthe soil is very dry of the detectors output is low. 

Correct voltage output for a given thicknessof coating has long been a matter of controversy. However, recent formulashave been suggested which may be used as a guide for correct peak voltageson various coating thickness. the calculation is as follows: 

V = K√ T WHERE 
V = Peak voltage in volts.
√T = Squareroot of the Thickness of bonded coating in mils(not including outer wrappers). 
K = Constant of 1,250 for coatings over30 mils and 525 for fusion bonded epoxy coatings. 

These formulas when applied to a coatingof 3/32" thickness and with a constant of 1,250 would indicate an appliedvoltage of 12,500 volts peak or a coating of 16 mil thickness and witha constant of 525 would indicate an applied voltage of 2,100 volts peak.A common practice used in setting inspection voltages in the field I sto adjust the output voltage by visual observation. It is the general consensusthat spark discharge at least twice the thickness of the coating will giveadequate inspection. 

Consult the coatingmanufacturer for recommended voltage applications.
 
 

5.INSTRUMENT SERVICING INSTRUCTIONS

A. Cleaning

     Keep the instrumentclean and dry. Clean the instrument case with a soft cloth 
     dampened withkerosene, then wipe dry. Do not use solvents such as lacquer thinner, 
     methyl ethylkeytone, etc. KEEP ALL ELECTRICAL CONTACTS CLEAN. 
 

B. Voltage Output Checks

     1. In case ofLOW output voltage:

        a. Check position of voltage selector switches. 
        b. Check battery (is it fully charged?). 
        c. Check for "parted conductor in voltage probe and/or ground trail. 
 

     2. In case ofNO output voltage: 

        a. Check battery. 
        b. Check for "parted" conductor in voltage probe and/or ground trail. 
        c. Check battery contacts, MAKE SURE THEY ARE CLEAN. 
 
 

6.BATTERY CHARGING INSTRUCTIONS

A. Use ONLY the battery charger provided. 

B. Charge battery nightly after use. 

C. To charge battery in the instrument. 

     a. Connect plugof the battery charger to jack on battery through access door. 
     b. Plug AC powercord into proper outlet. 
 

D. Charger indicator light is on duringcharging. It will begin to flash on and off when battery is
      fully charged. 
 

E. To charge battery OUTSIDE the instrument: 

     a. Remove batterythrough battery access door. 
     b. Connect batterycharger plug to battery jack and follow step C above. 
 

F. Charge battery at temperatures above45 degrees for best results. 

G. Always disconnect charger from batteryand AC outlet when not in use. 
 
 

7.BATTERY MAINTENANCE INFORMATION

A. When instrument fails to operate normallythe battery may be fully discharged. Recharging 
     battery nightlywill extend battery life. 

B. Store at room temperature 68 degreesF (20 degrees C) or below when not in use. 

     Note:Do not store battery in discharged state. Recharge every 30 days, if notin use. 
 
 

8.SHIPPING INSTRUCTIONS

All instruments being returned for repair should be sent PREPAID to either address below: 

Ship Via Courrier (UPS, FedEx, DHL, etc)

Tinker & Rasor
ATTN: Repairs
791 S. Waterman Ave.
San Bernardino, CA 92408

Ship Via US Postal Mail

Tinker & Rasor
ATTN: Repairs
PO BOX 6890
San Bernardino, CA 92412-6890

Include with shipment information the nature of the problem, purchase order, serial number
and return delivery address, phone and fax numbers. Immediate service is guaranteed!