Instruction Manuals - Cole-Parmer

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<strong>Instruction</strong> Manual pH 1100/ 210012 RS 232 COMMUNICATIONThis meter will send data to a printer and computer through the RS-232 port located on the back panel of the meter.See Figure 188. This meter uses a 9 pin serial connection for RS-232 communication.12.1 Using with printerIf you are going to use your meter to send data to a printer, you must first configure your meter to match the settings foryour printer (consult printer manual for proper printer operation). See Meter Setup mode P4.4 Tx/Rx Parameter (page53) to set baud rate, stop bit and parity for your meter.12.1.1 Sending data to printerYou can either send current data or data stored in memory to your printer. See Meter Setup mode Program P4.5 DataTransfer (page 53) to select which data is sent to your printer.1. Connect your meter to printer (consult printer manual for cable connections). Use a 9 pin serial connection forpH 1100 and pH 2100).2. To send data to your printer, press the PRINT key on the meter.12.2 Using with computerUse the RS-232 cable to connect your meter to a computer. Refer to enclosed software disc for instructions on how touse software with your meter.Figure 188: Back Panel of Meter56
<strong>Instruction</strong> Manual pH 1100/ 210013 ADDITIONAL INFORMATION13.1 pH and TemperatureThe pH electrode is affected by temperature changes. Automatic Temperature Compensation (ATC) compensates forthese temperature changes. Some solutions show an increase while others a decrease in pH with the same temperaturechange. Record the solution temperature along with the pH value, or the measurement may be meaningless.Temperature changes also affect the signal the pH electrode sends to the meter and causes a loss of accuracy for thereading. To limit the loss of accuracy during calibration, make the temperature of the pH buffer calibrating solutions andthe sample solution the same.13.2 pH Buffer Calibration SolutionYou can use standard buffer solutions to calibrate a pH meter before you measure the pH of a sample. Calibrationsolutions serve as basis of comparison between measurements. The most common standard buffers are pH 4.01,pH 7.00 and pH 10.01.For 1-point calibration, use a standard buffer of pH 7.00 or 6.86, or a standard or custom buffer whose pH value is closeto that of the sample. Use 2-point calibration when you know the sample is acidic (low pH) or basic (high pH). Forexample: in acidic samples, use standard buffers such as pH 7.00 and pH 4.01; in basic samples, use standards such aspH 7.00 and pH 10.01.Use multi-point calibration when the sample pH is completely unknown or for best accuracy over the entire pH range.Contact your distributor for information on pH buffer and calibration solutions.13.3 Standard pH BuffersThe following table shows the various pH values at different temperature of the solution during calibration. The table alsoillustrates why a calibration value may be different from the buffer value at 25°C.Temperature (°C)USA BufferNIST Buffer1.68 4.01 7.00 10.01 12.45 1.68 4.01 6.86 9.18 12.450 1.67 4.01 7.12 10.32 13.43 1.67 4.01 6.98 9.46 13.435 1.67 4.01 7.09 10.25 13.21 1.67 4.01 6.95 9.40 13.2110 1.67 4.01 7.06 10.18 13.00 1.67 4.01 6.92 9.33 13.0015 1.67 4.00 7.04 10.12 12.81 1.67 4.00 6.90 9.28 12.8120 1.68 4.00 7.02 10.06 12.63 1.68 4.00 6.87 9.23 12.6325 1.68 4.01 7.00 10.01 12.45 1.68 4.01 6.86 9.18 12.4530 1.69 4.01 6.99 9.97 12.29 1.69 4.01 6.85 9.14 12.2935 1.69 4.02 6.98 9.93 12.13 1.69 4.02 6.84 9.11 12.1340 1.70 4.03 6.97 9.93 11.99 1.70 4.03 6.84 9.07 11.9945 1.70 4.04 6.97 9.86 11.84 1.70 4.04 6.83 9.04 11.8450 1.71 4.06 6.97 9.83 11.70 1.71 4.06 6.83 9.01 11.7055 1.72 4.08 6.97 9.81 11.58 1.72 4.08 6.83 8.99 11.5860 1.73 4.10 6.98 9.79 11.45 1.73 4.10 6.84 8.96 11.4565 1.73 4.11 6.98 9.77 11.45 1.73 4.11 6.84 8.94 11.4570 1.74 4.12 6.99 9.76 11.45 1.74 4.12 6.84 8.92 11.4575 1.75 4.14 6.99 9.75 11.45 1.75 4.14 6.85 8.91 11.4580 1.77 4.16 7.00 9.74 11.45 1.77 4.16 6.86 8.89 11.4585 1.78 4.18 7.01 9.73 11.45 1.78 4.18 6.87 8.87 11.4590 1.80 4.23 7.02 9.73 11.45 1.80 4.23 6.88 8.85 11.4595 1.81 4.23 7.03 9.74 11.45 1.81 4.23 6.88 8.85 11.45100 1.81 4.23 7.03 9.74 11.45 1.81 4.23 6.88 8.85 11.45105 1.81 4.23 7.03 9.74 11.45 1.81 4.23 6.88 8.85 11.4557
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Instruction Manuals - Cole-Parmer

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