| 摘要 |
1. Desired value transmitter of an analog control system for the speed of a rotation viscometer, having a reference function generator (20) with an output line and a supply line (11) for an electrical level, with which an initial value of a generated reference function can be predetermined, and a further supply line (51) for control signals, having means (10) for producing the electrical level, and having means (50) for producing the control signals, characterized by the combination of the following features : - a gate circuit (30) with a supply line (21) for the electrical signal from the reference function generator (20) via its output line, and at least one further supply line (52) for control signals from the means (50) for producing these control signals, a holding circuit (40), connected to the output of the gate circuit, and with at least one output line (41) for a generated desired value ; - the reference function generator (20) repeatedly produces a reference function at a frequency determined by the control signals ; - the electrical level and the change rate of the reference function are determined by one of two electrical resistors (R1 , R2 ) in each case ; - these two resistors (R1 , R2 ) are arranged in a module in the device which is easily exchangeable. |
