CS229751B1 - Connection to multi-site differential temperature measurement - Google Patents

Abstract

Connection for multi-point differential temperature measurement relates to the field of measurement technology. The purpose of the invention is to ensure temperature measurement at multiple points with high accuracy by a single digital meter. The essence of the invention lies in connecting the digital meter via the measuring thermocouple switch to one terminal of the thermostats as well as via the measuring source switch to one of its poles, the switching contacts of the measuring thermocouple switch and the measuring source switch and the second pole of the measuring source are interconnected and connected to the switching contact of the first decade switch of the measured points.

Description

1,229,751

BACKGROUND OF THE INVENTION The present invention relates to a high-precision multi-site temperature difference thermocouple using a single digital meter.

The measurement of the temperature at several locations is directly accomplished by thermocouple thermonapacity measurement during their decades, these sequentially switching to the meter.This measurement has the disadvantage of directly measuring the value of the thermaprobe, which is only possible on the respective scale of the meter for the respective thermocouple pair. Tests are slight deviations on a scale that cannot be subtracted and determined by estimation. The measurement and the compensator increases the sensitivity of the measurement, but has disadvantages in the long preparation of the compensator for the actual measurement and in the laboriousness of concentrating its own measurement, which is particularly undesirable due to the temperature of the larger number of points required for the specified time. an environment of shocks, shakes and values cannot be registered. 2,229,751

These drawbacks are overcome by the inclusion of a high precision single-meter multi-temperature temperature measurement with a single digital meter allowing direct control of the thermocouple, the measurement source, and obtaining the difference as a controlled thermonaptha allowing full automated recording measurement operation.

The essence of the invention is that the switching contact of the single-pole decimal switch of the measured points is connected to one pole of the measuring source as well as the switching contact of the switch of the measuring source as well as to the switching contact of the switch of the measuring thermocouple, the second pole of the measuring source is connected to the break contact of the switch a measuring source whose switching contact connected to one digital meter terminal its second terminal is connected to a thermocouple switch switch contact, the thermocouple switch switch contact is connected to all other thermostat terminals, and a switching contact of the second part of the two-pole decade switch of the measured points is connected to the breaker thermocouple selector switch contact. The advantage of the proposed connection lies in its simplicity, at least the focus of the operator, the possibility of connecting only one thermocouple to the meter while registering the value to be scattered.

An overall schematic representation of a fourteen-decade measurement of the depth of the four-point measurement points of the measurement object with the single-pole switches of the measured points shown in FIG. 1. FIG. 2 shows the same circuit with the two-pole switches of the measurement points.

The connection consists of measuring thermocouples 3 ^ connected to the connection terminals; connection terminals 2 connected to the compensation line; a compensating line 2 »connected to the thermostats; thermostats £, 3,229,751 connected to the equalization resistances and the meter or switches of the measured points; buffer resistors connected to switches of measured points; switches of the measured points 6, the interconnected and connected meters measuring the digital meter χ connected to the thermocouple switches; thermocouple selector switch 8, connected to the meter source switches; a switch of a measuring source 2 connected to a meter and a measuring source 10 connected to the switches of the meter source.

We use the connection of the invention in such a way that in the sliding position of the decade switches of the measured points 6 of the switch of the measuring source 2 the terminals of the digital scale X are shorted. The measuring thermocouple switch 8i with the measurement source switch χ connects to the digital meter χ the measuring source 10, which adjusts the voltage value corresponding to the thermonapture temperature of the thermocouples being checked 1. The measuring thermocouple switch switches to the meter 8 the measuring circuit and the twelve-digit switches of each decade 6, the measuring thermocouple 1 is connected one after the other to the measurement source 10, the χ measurement of the difference is recorded and the thermocouples 1 of the measuring object are evaluated, the Meranies repeats the need. When measuring only some of the measuring thermocouples χ, the respective measuring thermocouple is always connected to the measuring source 10 by the switch of the measured points. After the measurement, the switch position and also the connection to the measuring housing will adjust the 10-gauge thermocouple. If a thermocouple measurement value does not match, it can be simultaneously checked by directly connecting the thermocouple to the digital meter with the measurement source switch 2, which returns to the flood position when measured.

The connection of the present invention can be used to connect a plurality of thermocouples as one of the measurement points switches to one meter with very high accuracy

Claims (2)

4 Subject 229 751 1. Connecting to Multiple Differential Temperature Measurements The individual thermocouple terminals are connected via a thermocouple compensating line through the connection terminals, one of the terminals of which is connected to the equalizing resistors, all the other thermostat terminals are interconnected, the equalizing resistors are switched to the switches. The measured contact points, one switching contact of each decade of the pre-switch of the measured points is connected in continuous sequence to the follow-up changeover contact Z and the next decade switch of the measured points, the switching contact of the last decade I switch of the measured points is connected to the second terminal of the number the scale and switching the second parts of the decade switches of the measured points is the same as their first parts, characterized in that the changeover contact of the first single-line clock switch of the measured points (6) is connected to the pole of the measuring source (10) on the switching contact of the measuring source switch (9) as well as the switching contact of the measuring thermocouple switch (8), the second pole of the measuring source (10) is connected to a normally open contact of the switch of the measuring source (9) whose switching contact is connected to a single terminal of the digital the gauge (7) its second terminal is connected to the changeover contact of the thermocouple selector switch (8), the break contact of the thermocouple selector ($ 8 is connected to all the other thermostat terminals (4), 2, the connection to the multi-digit differential temperature measurement according to claim 1, characterized in that the switching contact of the second part of the first two-pole decade switch of the measured points (6) is connected to the break contact of the thermocouple switch (8). 2 drawings