Field Calibration Procedure 1600 Series LOVE CONTROLS DIVISION Dwyer Instruments, Incorporated ® Rev. 2/99 PO Box 338 m Michigan City, IN 46361-0338 (800) 828-4588 m (219) 879-8000 m FAX (219) 872-9057 www.love-controls.
Required Equipment Input Signal Thermocouple inputs require a Millivolt Runup (MVR) with an output impedance of 100 ohms or less. Accuracy must be ±0.1% or better. RTD inputs require a laboratory grade Resistance Decade box (RD) with resolution to 0.01 ohm and an accuracy of ±0.1% or better. Voltage inputs require a variable power supply with a maximum of 10 Volts or greater. Current inputs require a variable power supply (as Voltage inputs above) and a precision resistor of 100 ohms ± 0.1% or better.
For current inputs wire the control as shown on Figure C. If you are using a 10 volt power supply with a 100 ohm resistor, set the DMM input to read on the 2 volt scale, and read current in milliamps divided by 10. If you are using a 20 volt power supply, set the DMM to read on the 20 volt scale, and read current in milliamps. Variable Power Supply Control (Partial view) + + _ _ + _ DMM Figure A. Thermocouple, milllivolt, and voltage input wiring.
Variable Power Supply Resistor Control (Partial view) + + _ _ + _ DMM Figure C. Current input wiring. Overview Calibration for the various inputs fall into six different groups. Generally, for field calibration only the group that applies to your desired input needs to be checked. To select a group make sure that the input you are using is selected for the InP menu item in the Secure Menu.
Procedure 1. Wire the control as shown in Figures A, B, or C for the input to be calibrated. 2. Set the Input DIP Switch for the desired input to be calibrated (See Figure D). DIP SWITCH LOCATION 1 2 3 4 THERMOCOUPLE INPUTS RTD INPUTS CURRENT INPUT VOLTAGE INPUT Figure D. Input DIP Switch Location and Settings 3. Allow the control to warm up for at least one hour before proceding. 4. Enter the Secure Menu by simultaneously holding the UP ARROW and ENTER keys for five seconds.
use the letters a through f in addition to the digits 0 through 9. Count the numbers as follows: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, b, C, d, E, F, 10. If the displayed value is out of range, the control can not be calibrated and must be returned to the Factory for service. 8. Press the UP ARROW key once. The lower display should show CAL4. Read the value in the upper display. Refer to Table 1 for the range of values appropriate for the Group you are calibrating.
Caution: The components in the control are suseptable to damage from ESD, electrostatic discharge. Take appropriate action to avoid exposure to ESD. Controls damaged by ESD are not covered by warranty. 12. Remove the control chassis from the housing. Using Figure E carefully solder a small jumper wire across the RJC sensor on the A/D printed cirsuit board. Allow the board to fully cool before proceding. RJC Sensor (may be leaded bead or surface mount part) R13 Jumper Across Component Figure E.
Input Value Input less RJC Input Value Input less RJC CAL2 RJC RJC RJC RJC RJC CAL3 12C316C3 2d463146 CAL4 CAL5 CAL6 CAL7 CAL8 Input Read Input Read 12C312C312C316C3 16C3 16C3 4F414F414F414F41AA4A5341 5341 5341 5341 b24A 25.60 Ω 0.2734V +4.663mV -4.090mV 1.094mA 1b4C-1F4C 1b4C-1F4C 1b4C-1F4C 1b4C-1F4C 1b4C-1F4C 73.953mV 28.410mV 417.63 Ω 17.341mA 4.
