SERIES OTC25-N/L/P TEMPERATURE CONTROLLER Instruction Manual
Introduction Features Congratulations on your purchase of an Athena Series OTC25 Digital Temperature Controller. It is designed for ease of use and reliability wherever accurate temperature control is required. • Type J Input (OTC25 N, OTC25 L) • Type J or K Input (OTC25 P) • ±0.
Table of Contents Installation Installation Mounting Wiring Operation 1 2 3 OTC25 N On/Off Controller OTC25 L Limit Controller OTC25 P PID Controller 4 6 10 13 Calibration Error Codes IEC Requirements Warranty/Repair Information Technical Specifications 18 20 21 22 25 Pre-Installation Instructions 1. Inspect shipping carton for obvious signs of mishandling. 2. After removing the controller from the shipping carton, inspect it carefully for damage. Never attempt to install and use a damaged unit. 3.
Mounting Wiring Figure 2. Mounting Diagram IMPORTANT: All electrical wiring connections should be made only by trained personnel using Class 1 wiring, and in strict accordance with the National Electrical Code and local regulations. Both of the incoming power lines should be fused with 2AG, 0.5 A maximum rated fuses. The OTC25 controller has built-in circuitry to reduce the effects of electrical noise (RFI) from various sources; however, power and signal wires should always be kept separate.
Operation Operation Athena Series OTC25 Digital Temperature Controller Just a few easy steps are required before your OTC25 can be placed into service. After completing the mounting and wiring procedures as previously instructed, set each controller parameter using the simple front-panel keys as instructed. Three-Digit LED Display Displays measured temperature, setpoint, or parameter labels and settings.
OTC25 N Operation OTC25 N Operation OTC25 N On/Off Temperature Controller The Calibration High and Calibration Low selections are accessible only when the calibration jumper is installed as instructed on page 18 (Figure 6). Normal Operation The factory default display setting of the OTC25 N is for Actual Temperature . The default display may be changed to setpoint temperature by selecting Setpoint at the Default Display parameter selection.
OTC25 N Operation OTC25 N Operation observe the other value by momentarily pressing the Parameter Key. This will cause the alternate value to be displayed for five seconds. Control Hysteresis is adjustable between 2 and 252° F (1 to 140° C ). This parameter is used by the control algorithm to prevent rapid cycling of the output around Setpoint. The default value is 4° F (2° C). This means the heat will turn OFF when the Actual Temperature exceeds the Setpoint by 2° F (1° C).
OTC25 L Operation OTC25 L Operation OTC25 L Limit Controller Normal Operation The factory default display setting of the OTC25 L is for Actual Temperature . The default display may be changed to setpoint temperature by selecting Limit Setpoint at the Default Display parameter selection. When the Default Display is changed to Limit Setpoint, the limit setpoint temperature may be adjusted by using the Raise or Lower keys. The limit setpoint is adjustable from 32 to 905° F (0 to 485° C).
OTC25 L Operation OTC25 P Operation Limit Setpoint The Limit Setpoint determines the temperature at which the limit output will become inactive, interrupting power to the process. It is operator-selectable from 32° to 905° F (0° to 485° C). Automatic Startup Reset The automatic startup reset feature allows the limit output to be automatically reset at startup or to be latched at startup.
OTC25 P Operation OTC25 P Operation Figure 5c. Series OTC25 P Parameters and Default Settings Parameter Descriptions Default Display This parameter determines whether the OTC25 P’s display shows the Setpoint or the actual temperature by default. Regardless of the selection made here, the operator can observe the other value by momentarily pressing the Parameter Key. This will cause the alternate value to be displayed for five seconds.
OTC25 P Operation OTC25 P Operation temperature as a compensation for offsets between the true temperature and the temperature seen by the thermocouple. Proportional Band Proportional Band is a PID parameter that represents the amount of deviation of the controlled variable required to move through the full range, expressed in % of span or degrees of temperature. This parameter can also be expressed as “Gain” (the wider the band, the lower the gain).
Calibration Calibration Calibration The Calibration High and Calibration Low selections are accessible only when the calibration jumper is installed (Figure 6). , Calibration of the OTC25 controller requires the operator to apply two separate fixed and specific signals (Calibration Low and Calibration High) from a reference source (thermocouple calibrator) to the controller. The Raise Key “tells” the controller to read the applied signal and use it as a reference point. Calibration Procedure 1.
IEC Requirements Calibration 8. Adjust the reference source to output a voltage equivalent to that generated by a “J” or “K” (OTC25 P) thermocouple at the temperature flashing on the display. (Allow reference to settle for 10 seconds before proceeding.) The maximum supply current is line voltage dependent: 9. Repeat Step 6 for this reference point. 60 mA for an 100-250 Vac input 10. Press the Parameter Key for 10 seconds or allow 60 seconds of inactivity. 11.
Warranty/Repair Information Warranty/Repair Information Two-Year Limited Warranty THIS EQUIPMENT IS WARRANTED TO BE FREE FROM DEFECTS OF MATERIAL AND WORKMANSHIP. IT IS SOLD SUBJECT TO OUR MUTUAL AGREEMENT THAT THE LIABILITY OF ATHENA CONTROLS, INCORPORATED IS TO REPLACE OR REPAIR THIS EQUIPMENT AT ITS FACTORY, PROVIDED THAT IT IS RETURNED WITH TRANSPORTATION PREPAID WITHIN TWO (2) YEARS OF ITS PURCHASE.
Warranty/Repair Information Technical Specifications Unit Repairs It is recommended that units requiring service be returned to an authorized service center. Before a controller is returned for service, please consult the service center nearest you. In many cases, the problem can be cleared up over the telephone. When the unit needs to be returned, the service center will ask for a detailed explanation of problems encountered and a Purchase Order to cover any charge.
Technical Specifications Technical Specifications Mechanical Characteristics Display Display Height Color Front-Panel Cutout Bezel Outside Dimensions Bezel Height Case Depth Weight Connections Contacts Output Source (Power to Heater) 7-segment LED, alphanumeric: 3 digits 0.56" (14.22 mm) Orange 3.622" x 3.622" (92 mm x 92 mm) 3.780" x 3.780" (96 mm x 96 mm) 0.250" (6.35 mm) 3.515" (89.28 mm) < 15 oz (425 g) 7 “Fast-On” .250” (6.
For Technical Assistance in the U.S., Call Toll Free: 1-800-782-6776 CORPORATE HEADQUARTERS EUROPE Athena Controls, Inc. 5145 Campus Drive Plymouth Meeting, PA 19462 U.S.A. Tel: (610) 828-2490 Fax: (610) 828-7084 Toll-Free in U.S.: 1-800-782-6776 Internet: www.athenacontrols.com Athena Controls, Ltd. Capitol Business Centre 60 Bramhall Lane South Bramhall, Stockport Cheshire, SK7 2DU, England Tel: +44 (0) 161 440 2522 Fax: +44 (0) 161 440 9322 E-mail: AthenaUK@aol.
