INSTRUCTIONS FOR THE 2500 SERIES MICROPROCESSOR BASED TEMPERATURE CONTROL LOVE CONTROLS DIVISION Dwyer Instruments, Incorporated ® December, 1998 PO Box 338 m Michigan City, IN 46361-0338 (800) 828-4588 m (219) 879-8000 m FAX (219) 872-9057 www.love-controls.
TABLE OF CONTENTS MODEL IDENTIFICATION ...................................................................... 4 INSTALLATION ....................................................................................... 4 WIRING ................................................................................................... 5 FRONT PANEL KEY FUNCTIONS ......................................................... 6 MENU SELECTIONS .............................................................................
GETTING STARTED 1. Install the control as described on page 4. 2. Wire your control following the instructions on page 4 and drawing on page 5. 3. Most controls do not need many (if any) program changes to work on your process. For best results if programming changes are necessary, make all the necessary changes in the Secure Menu (page 10) before making changes to the Secondary Menu (page 8). If error messages occur, check the Diagnostic Error Messages on page 15 for help.
MODEL IDENTIFICATION Model 2 5 Alarm 0 = No 1 = Yes Input 1 = Thermocouple, J,K,T,E,N,L 2 = RTD, DIN, NIST, Ni 120 INSTALLATION Output 1 = SSR 2 = 5 VDC 3 = Relay 5 = Current Mount the instrument in a location that will not be subject to excessive temperature, shock, or vibration. All models are designed for mounting in an enclosed panel. Select the position desired for the instrument on the panel. Prepare the panel by cutting and deburring the required opening.
WIRING Do not run thermocouple or other input wiring in the same conduit as power leads. Use only the type of thermocouple or RTD probe for which the control has been programmed. Maintain separation between wiring of sensor, auxilliary in or out, and other wiring. See the "Secure Menu" for input selection. For thermocouple input always use extension leads of the same type designated for your thermocouple. For supply connections use No. 16 AWG or larger wires rated for at least 75°C.
FRONT PANEL KEY FUNCTIONS Set Point Lamp Alarm Lamp Temperature Display °F Indicator ° ° °C Indicator Set Point Display Decimal point on lower display flashes The °F/°C indicator while ramping func- will flash while Self- tion is active. Tune is operating. Key functions are as follows: INDEX: Pressing the INDEX key advances the display to the next menu item. May also be used in conjunction with other keys as noted below.
While in the Primary or Secondary menu, if no key is pressed for a period of 30 seconds, the display will return to the HOME position displaying the temperature value. The time is increased to 1 minute when in the Secure menu. NOTE: To move to the primary menu quickly from any other menu, press the UP ARROW & ENTER keys followed by pressing the INDEX & DOWN ARROW keys. SECURITY LEVEL SELECTION Four levels of security are provided. The display shows the current security level.
MENU SELECTIONS PRIMARY MENU Press INDEX to advance to the next menu item. Press UP ARROW or DOWN ARROW to change the value in the display. Press ENTER to retain the value. SP Set Point Adjust, Control Point. SECONDARY MENU Hold UP ARROW & ENTER. Press INDEX to advance to the next menu item. Press UP ARROW or DOWN ARROW to change the value in the display. Press ENTER to retain the value. ALLo Alarm Low: The Low Alarm point is usually set below the Set Point.
outputs. Set the value for the amount of temperature difference between the turn off point (set point) and the turn on point. Only appears if CY is set to ONOF. Out Fixed at ProP. For Current (Code 5) outputs only. tunE Tuning Choice: Select SELF or Pid. SELF The Controller will evaluate the Process and select the PID values to maintain good control. The ramp function (rt) can not be selected while SELF tunE is active. The temperature descriptor will flash while SELF tunE is active.
compensate for sensor error. Note: InPC is reset to zero when the input type is changed, or when decimal position is changed. FiLt Digital Filter: Select OFF, 1 to 99. In some cases the time constant of the sensor, or noise could cause the display to jump enough to be unreadable. A setting of 2 is usually sufficient to provide enough filtering for most cases, (2 represents approximately a 1 second time constant). When the 0.1 degree resolution is selected this should be increased to 4.
returns to the decimal point range, the display will autorange back to tenth dergee resolution. InPt Input Fault Timer: Select OFF, 0.1 to 540.0 minutes. Whenever an Input is out of range (UFL or OFL displayed), shorted, or open the timer will start. When the time has elapsed, the controller will revert to a safe condition (Output Off, Flashing Display). If OFF is selected, the Input Fault Timer will not be recognized (time = infinite).
ALARM TYPE AND ACTION (if present) Caution: In any critical application where failure could cause expensive product loss or endanger personal safety, a redundant limit controller is required. When setting an alarm value for an absolute alarm (ALt = AbS), simply set the value at which the alarm is to occur. When setting the alarm value for a deviation alarm (ALt = dE), set the difference in value from the Set Point (SP) desired.
The following menu items apply only to the alarm. AL Alarms: Select OFF, Lo, Hi, or HiLo. OFF Alarms are turned OFF. No Alarm menu items appear in the Secondary and Secure menus. Lo Low Alarm Only. ALLo appears in the Secondary Menu. Hi High Alarm Only. ALHi appears in the Secondary Menu. HiLo High and Low Alarms. Both share the same Alarm Relay output. ALt Alarm Type: Select AbS or dE AbS Absolute Alarm that may be set anywhere within the values of SPL and SPH and is independent of SP.
SPECIFICATIONS Selectable Inputs: Thermocouple or RTD as ordered. Input Impedance: Thermocouple = 3 megohms minimum. RTD current = 200 µA. Sensor Break Protection: De-energizes control output to protect system. Set Point Range: Selectable (See range chart page 16 ). Display: Two 4 digit, 7 segment 0.56" high LEDs. Control Action: Reverse (usually heating), Direct (usually cooling) selectable. Proportional Band: 5 to 5000 °F or equivalent °C. Reset Time (Integral): Off or 0.1 to 99.9 minutes.
DIAGNOSTIC ERROR MESSAGES DISPLAY MEANING SP OUTPUTS ACTION REQUIRED UFL or OFL Underflow or Overflow: Process value has exceeded input range ends. Set point output active Alarms active Input signals may normally go above or below range ends. If not, check input and correct. UFL or OFL will sequence to display one of these messages if the InPt is set for a time value. For RTD inputs RTD is open or shorted. Set point output inactive Alarms active To reset use the INDEX & ENTER keys.
DIMENSIONS ° ° INPUT RANGES Thermocouple Types Input Type Type J or L Type K Type T Type E Type N Range 1°F -100 to +1600 -200 to +2500 -350 to +750 -100 to +1800 -100 to +2372 -73 to +1300 1°C -73 to +871 -129 to +1371 -212 to +398 -73 to +982 RTD Types Input Type Range 1°F 1°C 100 Ohm Platinum 0.00385 DIN Curve 100 Ohm Platinum 0.00392 Nist Curve 120 Ohm Nickel 0.
