Tinker & Rasor CI-50 Quick Start Manual

Current interrupter 2010 release

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Contents of the shipping package:

Instrument Kit Includes:

 Model CI-50 Instrument in tan case

 (4) AA Batteries (installed)

 Cable, 6' length with clamps

 Instruction manual

 Warranty Card

Inspection of the instrument should be performed upon receipt. If damage has occurred in

shipment, file a claim with the carrier immediately. If it is necessary to contact your supplier

or Tinker & Rasor, be sure to include all information such as serial number, purchase order

number and invoice number.

Important Note Regarding Rectifier Spikes

Most rectifiers experience a voltage spike when opening and closing, due to a capacitance

effect in the system that can be quite large and very fast. Depending upon the magnitude and

duration of the spike, the solid state circuitry of the CI-50, and most other current interrupters

made today, can become significantly damaged. It is recommended that an oscilloscope be

connected to a rectifier and the rectifier be manually cycled to see what type of spike may be

present, prior to using an interrupter. This step is suggested for all rectifiers, but is a

recommendation if the DC output of the rectifier is 50% or more of the maximum current the

interrupter can handle. To better understand this issue, please see Technical Appendix A

(attached to this document).

General Information

The Model CI-50 Current Interrupter is designed to interrupt cathodic protection systems. The

instrument using solid state switching (no mercury relay) capable of interrupting up to 50 Amps

of current at up to 120 volts (6000 WATT). The Model CI-50 can be used to interrupt the

connection between:

 Rectifier and Structure (DC)

 Rectifier and Anode(s) (DC)

 AC Source and Rectifier (120v, single phase)

Web: www.tinker-rasor.com

Sponsoring members of NACE International, NACE Foundation

CORROSION MITIGATION INSTRUMENTATION

2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: (830) 253-5621

ODEL

URRENT

NTERRUPTER

(2010 RELEASE)

- 1 -

CI-50

E-mail: Info@tinker-rasor.com

QMF-570 105-056

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Summary of Contents for Tinker & Rasor CI-50

Page 1 The Model CI-50 Current Interrupter is designed to interrupt cathodic protection systems. The instrument using solid state switching (no mercury relay) capable of interrupting up to 50 Amps of current at up to 120 volts (6000 WATT). The Model CI-50 can be used to interrupt the connection between: ...
Page 2 Programming the CI - 50: The Model CI-50 is capable of interrupt cycles of 0.1 sec Closed (Seconds On) and Open (Seconds Off). To program the CI-50, it is necessary to follow these simple steps: (1) Turn the instrument on by moving the toggle switch UP.
Page 3 Once the Display is off, the Program button can be used. To begin an interruption program, the Model CI-50 is first turned On by moving the Power toggle switch to On (Up). Note the OPEN LED is lit.
Page 4 Start / Start button once more, or turn the Power toggle switch to Off (Down). The Model CI-50 is a normally Open (Off) instrument. This means that when not in operation or when the power is turned off, the circuit through the instrument is Open (Off). When a program begins, the program always starts in the Open (Off) position.
Page 5 Once the Display is off, the Program button can be used. Stopping / Ending Operation To stop the operation of the Model CI-50, press the Start / Stop button. The instrument can also be stopped by moving the Power toggle switch to Off (down). Maintenance The Current Interrupter does not require maintenance other than occasional battery replacement.
Page 6 CORROSION MITIGATION INSTRUMENTATION 2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: (830) 253-5621 CI-50 ODEL Specifications of the Model CI-50 Maximum 50 Amps Current: Maximum 120 Volts Voltage: Maximum 6000 Watt Wattage: Switching: Solid state (no mercury relays) (Closed) 0.1 sec to 99.9 sec (Programmable)
Page 7 This step becomes especially important when the DC output of the rectifier is ≥ 50% or more of the maximum current the interrupter can handle. In the case of the CI-50, which is a 50 Amp max instrument, a rectifier with an output greater than 24 amps should be investigated with an oscilloscope.