Platinum resistance thermometers (PRTs) are the most common reference standards used in thermometry calibration laboratories. They are calibrated either directly in terms of resistance, producing a table of actual temperatures (determined by higher-level standards, for example, standard PRTs or fixed ...
There are references to strapping and straps in the text below. This refers to the metal links that connect two terminals together. They can be removed by releasing the screws that hold them captive - always tighten the screws again afterwards as they have a tendency to fall out. In some i...
one can expect the output voltage to range from 55 millivolts to 390 millivolts which is less than one order of magnitude. A minimum pulse width of 10 microseconds would be required and the resistive load must be greater than 550 K ohms. If the minimum signal level were to be 1 micro...
The above diagram is a simplified version of the previous schematic drawn using modern CAD symbols. To see how the two-wire DC Selsyn works, consider three different wiper positions of R1. R1 has been split into two discrete resistors with a constant sum of 500 Ohms for the purposes of an...
You show the phantom filter resistor as 100 Ohms. But in the 548 channel, this resistor is actually 10k! It's been so long, not sure if the lower value was suggested: 500 series slots took over mic section of the 536 for my project. Still, good comparative catch! Aside: Kept the ...
assuming that the impedance of the power-supply source is zero ohms. As the mechanical quality factor Qmis generally larger than the electrical quality factor Qeand, moreover, the electrical quality factor is generally selected to be substantially equal to 1, it follows, using the formula ##EQU...
Platinum resistance thermometers (PRTs) are the most common reference standards used in Thermometry calibration laboratories. They are calibrated either directly in terms of resistance, producing a table of "actual temperatures" (determined by higher-level standards, for example, standard PRTs or fixed ...
where T is the temperature in °K and K is the temperature coefficient of the heater element 40. The numerical value of resistance 52 may be selected to place the value of the voltage at junction 56 in a convenient range. Typically this may be a resistance of 4 ohms. This value may al...