OptiMelt Automated Melting Point System - Stanford Research ...

Chapter 1 Getting Started 5PrinterIf a printer is to be used, it should now be connected to your OptiMelt using the RS-232connection cable provided with your printer.Figure 6. Printer (RS-232) port and External RTD connector on the OptiMelt back panel.Inspect your printer and load a new roll of paper if necessary. Consult the PrinterConfiguration section later in this chapter for additional information.External ThermometerOptiMelt includes a back panel connection for a user supplied, external 100 Ω,α = 0.00385 Ω/Ω/°C, platinum RTD thermometer. Use this thermometer to measuretemperatures around the lab between melting point determinations. Two, three and fourwire connector configurations are available. The four-wire connection providesmeasurements which are independent of the wire length and is recommended by SRS.Locate the External 100 Ω Pt RTD connector on the back of the OptiMelt (see Fig. 3).Disconnect the terminal block plug from the connector and use it to connect to anexternal Pt RTD thermometer. Wiring instructions are shown below.External 100 Ω Pt RTD Thermometer Wiring Instructions4 wire configuration 3 wire configuration 2 wire configurationPin 1 Current Source Supply Current Source Supply Connect to Pin 2Pin 2 Voltage Sense (+) Voltage Sense (+) Voltage Sense (+) &Current Source SupplyPin 3 Voltage Sense (-) Voltage Sense (-) &Current Source ReturnVoltage Sense (-) &Current Source ReturnPin 4 Current Source Return Connect to Pin 3 Connect to Pin 3Spare terminal blocks are available from Stanford Research Systems.OptiMelt Automated Melting Point System