 -Instructionsfor CS-10 Current Supply- (for cathodicprotection testing) T&RProduct Instructions Current& Power Supply
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-Instructionsfor CS-10 Current Supply- (for cathodicprotection testing) T&RProduct Instructions Current& Power Supply
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NOTE: THIS UNIT IS NOT A RECTIFIER INTERRUPTER. THIS INSTRUMENT WILL INTERRUPT ITS OWN POWER ONLY. NOT AN EXTERNAL SOURCE, SUCH AS A RECTIFIER. 1. DIMENSIONS
3. GENERAL The CS-10 Portable Current Supply is designed to be a convenient source of current in areas without rectifiers or other power sources. The instrument output is selectable from zero to ten amperes. The range is selected by adjusting the range switch. It is intended primarily for temporary drains in connection with the cathodic protection of underground piping. It can also be a convenient source of current for testing insulating joints with a compass, determining the extent of a CP area, locating shorts and testing casings. 4. PRECAUTIONS The CS-10 can only be used in non-hazardous (unclassified) locations because it can supply current and voltages above those typically allowed in hazardous (classified) locations. 5. LOAD LIMITING CIRCUITRY The CS-10 is capable of supplying currents in excess of 10 Amps for very short periods of time, draining the batteries rapidly, (less than 10 minutes). To keep the output at an acceptable level the CS-10 circuit incorporates a current limiter for the protection of the regulating circuit and the batteries. A feature of the current limiter is the ability to detect whether or not the CS-10 is limiting the current through the circuit or the load is limiting the current through the circuit. In order to let the operator know when theCS-10 is limiting the current, the Limiting Indicator L.E.D. was incorporated on the front panel. When the CS-10 is limiting the current through the load the Limiting Indicator L.E.D. is off. When the load is limiting the current through the circuit, the Limiting Indicator L.E.D. is on continuously. 6. LOW VOLTAGE LOCK-OUT The Limiting Indicator L.E.D. has a second duty. It is to warn the operator when the internal battery of the CS-10 has fallen below 9 volts. Since the batteries in theCS-10 have an increasing chance of shorting when they are discharged beyond a safe point, the Low Voltage lockout is activated to keep this from happening. When the Low Voltage Lockout is reached there are two things that occur.
In order to distinguish between a Current Limiting condition and the Low Voltage lockout condition, the Limiting Indicator L.E.D. will start flashing. The Low Voltage lockout can only be reset when the CS-10 is turned off for 15 seconds and turned back on. At this point in time, it is recommended that the batteries be recharged immediately or use an external power source. 7. HEAT This type of equipment under high loads will build up high temperatures rapidly. Caution should be used to prevent damage to the CS-10. Operator should avoid direct contact with the panel after high output operation or after prolonged use. The panel on theCS-10 gets hot and stays hot in the higher output ranges. Use CAUTION! 8. INTERRUPTER The interrupter will increase battery life and decrease heating of the case at higher currents. The timer is engaged in or out of use by a 4 post rotary switch on the panel.
9. BATTERIES The CS-10 comes with a 12 volt lead/acid battery and can be operated with a 12 volt external power source (i.e., truck battery). The battery that controls the LCD is a standard 9 volt transistor battery. This should be checked with a voltmeter while working. Voltage under load should be above 7 volts. The 12 volt internal battery can be checked at the Battery test point on the Range Switch. 10. CHARGING The CS-10 has been designed so that the 12 volt internal battery can be charged via the auxiliary power supply (cigar lighter) present in most motor vehicles today. An overnight battery charger is included in the CS-10 kit. 11. CONNECTION To connect the CS-10to increase the polarization of a structure, a temporary ground bed (metal structure with good earth contact) is first connected to the "+" terminal; then connect the "-" terminal to the structure. Select either "Continuous" or one interrupt cycle as desired. Once the CS-10 is connected, turn the "CURRENT ADJUST" slowly clockwise until the desired current is indicated on the meter. If more current is needed than the internal battery can provide or long operation is anticipated, an external battery can be used by connecting the CS-10 to the external battery by the red and black binding posts marked "EXTERNAL POWER" and flipping the power switch to the external position. Attach the appropriated battery terminals to the proper binding posts. Whenever the CS-10 is not in use, turn the "CURRENT ADJUST" fully counterclockwise. The CS-10 can only be used in non-hazardous (unclassified) locations because it can supply currents and voltages above those allowed in hazardous (classified) locations. 12. CURRENT REQUIREMENT TEST During corrosion control work, it may be desirable to make tests to determine the amount of current required to cathodically protect a new structure, or bring a buried structure back up to protection. This test consists of forcing a direct current to flow from a temporary ground connection, to the target structure. Adjust the current output until the protective level is reached, at the lowest P/S (pipe to soil) voltage location. Polarization of a structure will take a period of time (up to weeks for bare structures). If instantaneous current vs. voltage readings are plotted, a prediction of the final polarized current requirement may be made. The CS-10 should be operated in the continuous mode for this test with the "positive" terminal connected to the temporary ground and the "negative" output connected to the structure. During this test, the location with the lowest Pipe to Soil reading can be determined if the protective current is to be installed at the same point as the test is being conducted. The low Pipe to Soil point will be the best location nor a test point to ensure that there is adequate cathodic protection current available to the system to meet protection criteria. 13. SHORT IDENTIFICATION TEST
If so, there is a high probability that there is a short (additional load connected) to the protected system. 14. SHORT LOCATION TEST To locate the short(s)on a protected system, the CS-10 can be connected to the structure to increasepolarization, as in the current requirement test above, but operated inthe interrupted mode. At various points on the protected structure takeboth "off" and "on" Pipe to Soil readings. Subtract the "off" reading fromthe "on" reading and record that difference (delta V) with the location.As you approach the short location, the delta V will decrease toward 0and as you pass and leave the sort location, the delta V will increaseagain. The lowest resistance short will usually be identified first soanother test for shorts should be performed to ensure that all shorts havebeen located and cleared. 15. INSULATOR LOCATION TEST To determine the location of buried insulator, hook the CS-10 to the structure and a temporary ground to increase the structure polarization and switch to the interrupted mode as in the short location test above. Then take half-cell readings until there is dramatically reduced on/off switching. This will indicate that the location is beyond an insulator. Pinpoint location can be completed with an Audio Frequency Locator such as Tinker & Rasor’s Models PD or Mark V Ranger. 16. CASING TEST Connect the CS-10so that it will depolarize the casing to a temporary ground. Take initial half-cell readings of the pipe and the casing, apply a small amount of current (approx. 30 mA) and take another set of half-cell readings. If the pipe and casing are both less negative, there is probably a some what low resistance path between them. However, if the pipe is slightly more negative and the casing less negative, there may be no short. Apply a larger amount of current (approx. 100 mA) and take another set of half-cell readings. If the pipe and casing are still less negative, a low resistant path is still indicated. If the pipe and casing keep the same reading as each other, the path has low resistance. If the pipe is still a little more negative and the casing less negative, any sort is of very high resistance. Additional current steps will help determine if there is a high resistance (electrolyte) connection between the pipe and the casing rather than a short. 17. TESTING INSULATION JOINTS WITH A COMPASS A magnetic compass used as a "lay-on" ammeter is a valuable means of checking insulating joints such as insulating unions and flanges. It will work on parallel flanges as in a manifold. The CS-10 makes this test simple. 18. WARRANTY Ninety day warranty on Parts and Labor. 19. TECHNICAL SUPPORT If you require assistancewith the CS-10 or any Tinker & Rasor product please contact us or e-mail Tinker & Rasor. 20. REPAIR Tinker & Rasor strongly suggests Tinker & Rasor perform all repairs. Tinker &Rasor must perform all warranty work. Many of the CS-10 components may not be readily available to outside repair agencies. All repairs are turned around in 24 hours. See below. 21.SHIPPING INSTRUCTIONS All instruments being returned for repair should be sent PREPAID to either address below:
Include with shipment information the nature
of the problem, purchase order, serial number |