User manual GTO PRO LOOP DETECTOR

[. . . ] e) DIP 5: INSTANT/DELAY OFF: Instantly activate the output relay when a vehicle is detected. ON: Delay for 2 seconds before activating the output relay when a vehicle is detected. If the vehicle is moved in less than 2 seconds relay will not be activated. f) DIP 6, 7, 8: SENSITIVITY DIP 6 OFF OFF OFF OFF ON ON ON ON DIP 7 OFF OFF ON ON OFF OFF ON ON DIP 8 OFF ON OFF ON OFF ON OFF ON Inductance change 2% 1% . 5% . 25% . 125% . 06% . 04% . 02% Vehicle size Larger Smaller g) DIP 9, 10: FREQUENCY SELECT These two switches provide four selectable loop frequencies. [. . . ] Design the loop geometry considering the area of detection, the type of vehicles to be detected and the distance between the loop and the loop dectector. The outline of the loop(s) should be marked on the pavement in such a way that the lines can be followed easily by the saw operator and not be erased by the water feed from the saw. Loop Perimeter 6' to 12' 13' to 20' 21' to 60' 61' to 240' 240' & Up # of Turns 6 5 4 3 2 1/4" Saw Slot SAW SLOT CROSS SECTION Pavement Surface Sealant 2" Backer Rod every 2 (two) feet. Loop Wire / 3 turns Loop wires must be twisted together - 6 twists per foot from the end of the saw slot to the detector. 4. When the outline of the loop and the lead-in has been marked the pavement can be cut. The saw cut should be approximately 2. 0 inches deep and 0. 25 inches wide. All 90 degree corners should be chamfered so that the course of the loop wire does not change direction sharply but rather at shallow angles of 45 degrees or less. The saw slot should be cleaned out and allowed to dry. Loop wire is typically 14, 16, 18, or 20 AWG with cross-linked polyethylene insulation, rated for direct burial. Since moisture can cause significant changes in the dielectric constant of the insulation, which results in excessive loop (frequency) drift, choose an insulation which is most impervious to moisture. PVC, TFFN, THHN and THHN-THWN should be avoided since they tend to absorb moisture and crack easily. XLPE (cross-linked polyethylene) is very resistant to moisture absorption and provides good abrasion resistance. If long lead-ins are required, it is suggested that the loop cable be spliced onto shielded, pretwisted, lead-in wire (IMSA specification 50-2 is recommended) at a convenient pull box location close to the loop. The shield may be connected to earth ground at the cabinet end but should then be insulated and isolated from earth ground at the loop end. Start laying the loop wire from the termination of the lead-in out towards the loop, continue around the loop for the number of turns required and finally return to the lead-in termination. Leave the lead-in wire out of the slot so that it may be twisted together before being laid in the slot. Lead-ins should be twisted with a minimum of 4 to 6 twist per foot to prevent any separation of the lead-in wires. Make sure that the loop wire is pushed fully to the bottom of the saw slot. The wire must be held firmly in the bottom of the slot using a plastic foam material called "backer rod", before applying loop sealent. Many different types of loop sealant are now available. Single part types are the easiest to apply since no mixing is required, but they also tend to be more expensive in terms of linear feet of saw slot filled. [. . . ] IMPORTANT: Call (850) 575-4144 or Fax (850) 575-8950 for a Return Goods Authorization (RGA) number before returning accessory to factory. Products received at the factory without an RGA number will not be accepted. Replacement or repaired parts are covered by this warranty for the remainder of the one (1) year warranty period or six (6) months, whichever is greater. will pay the shipping charges (equal to United Parcel Service GROUND rate) for return to the owner of items repaired under warranty. [. . . ]