Lakeshore 325, Руководство пользователя, Страница: 80 / 166

Lake Shore Model 325 Temperature Controller User’s Manual
5-4 Advanced Operation
Edit Curve (Continued)
Enter for Curve 21
Serial # 0123456789
Use the numerical keypad to enter the applicable sensor serial number; to a maximum of 10 digits. For this example, we
will enter 0123456789. Press the
Enter key.
Select for Curv21 °®
Curve Format V/K
Use the
s
or
t
key to cycle through the curve formats: V/K,

/K, log

/K, mV/K, where V/K = volts per kelvin,

/K = ohms per kelvin, log

/K = logarithm of the resistance per kelvin, and mV/K = millivolts per kelvin. For this
example, we will select V/K. Press the Enter key.
Enter for Curve 21
SP Limit 475.00½
Use the numerical keypad to enter a setpoint limit (in kelvin) appropriate for the sensor being used. For this example, we
will enter 475.00K. Press the
Enter key.
View for Curve 21
Temp Coeff Positive
The temperature coefficient (positive or negative) of the curve is displayed. The coefficient is calculated from the first
two points of the curve and cannot be changed. Press the
Enter key.
Now that the curve identification parameters are entered, it is time to enter curve breakpoints.
User Curve 21
¾ 0.00000v 00.0000½
The cursor initially blinks on the curve breakpoint number. When the cursor is in this position, use the
s
or
t
key to
scroll through the breakpoints in the curve. Press the Enter key to modify the current breakpoint. Use the numerical
keypad to enter the applicable sensor value. For this example, we will enter 0.09062V, then press the Enter key. The
cursor will jump to the temperature reading. Again use numerical keypad to enter the applicable temperature in kelvin.
For this example, we will enter 475.0K. Press the
Enter key.
¾ 0.09062v 475.000½
¿ 0.00000v 00.0000½
Use the numerical keypad to enter the remaining voltage and temperature points. After entering the final point in the
curve, press the
Enter key, then the Escape key. You will return to the normal display.
To add a new breakpoint to an existing curve, go to the end of the curve data and enter the new sensor reading and
temperature. Press the
Enter key, then the Escape key. The new point is automatically put into its proper place in
breakpoint sequence.