Electronic tachometers ТЭ-Д (with primary transducers ППЭ-Д1,ППЭ-Д2, ДЭМ, ДЭМ-1 or ДЭМ С)

Electronic tachometers are intended for continuous remote measurement of the rotation speed of machine and mechanism parts and output of results on a six-bit digital display.

Tachometers consist of ППЭ-Д1 (ППЭ-Д2) primary transducer (hereinafter – primary transducer) and ТЭ-Д indicating device (hereinafter – indicating device).

The indicating device can be operated with the following frequency conversion sensors: ДЭМ (ТУ В 25-7305.011-89), ДЭМ-1 (ТУ В 311-0227471.025-91), ДЭМ С (ТУ В 25-7305.011-89).

The primary transducer operates with one or two devices.

Indicating devices and primary transducers of the same type are respectively interchangeable.

The indicating device has two discrete outputs to control external devices (setpoints), intended for relay and LED alarm when the threshold rotation speed values are exceeded.

The indicating device has a version with two actuation setpoints of the measured quantity “НУ” and “ВУ” in case of an increase in shaft rotation speed:

“НУ” – low actuation threshold of the rotation speed operating range;

“BУ” – high actuation threshold of the rotation speed operating range.

Actuation threshold values are programmed in compliance with the order in the course of manufacturing the indicating device.

To be issued with the acceptance by the customer’s Military Representative Office.

General information

Measurementis equal to 1 rpm, and height of digital indicators is close to 5.5 mm.

Accuracy class of this tachometer type is 0.1/0.5.

It is necessary to note, that electronic tachometers are completely operable at:

• vibrations at frequency 5 Hz to 5,000 Hz, at acceleration of 100 m/s²
• relative humidity to 98% at temperature values of 35°С;
• ambient temperature as from minus 40, as to plus 80°С – this is for primary transmitters. Minus 40 to + 60°С – this is for indicating devices, of type ОМ5. And minus 10 to +60°С – this is for ОМ4.

Electronic tachometers are supplied from:

- DC mains with voltage

- rectifier without filtering the rectified current at an average rectified voltage value

Which are the basic principles of tachometer design and operation?
The operation of all tachometers is based on pulse-counting principles, constituting in the fact, that indicating devices count the number of pulses received from primary transmitters, during the set stable time interval.

The values of electronic tachometers can be monitored remotely, this is ensured due to transfer of pulse signals from primary transmitters to indicating devices via double-wire communication lines. Power supply of the primary transmitters with stabilized current is conducted via the same lines. It ensures jamming resistance upon transfer of pulse signals.

We produce only high quality electronic tachometers at our plant. Contact our specialists by telephones.

General specifications

Note. Tachometer factor means a ratio of the input rotation speed to the rotation speed indicated by the indicating device.– page 94 of the Catalog

Delivery kit

Notes:

• For delivery of tachometer ТЭ-Д, the primary transducers ППЭ-Д1 can be replaced with ДЭМ-1, and ППЭ-Д2 can be replaced with ДЭМ.
• ДЭМ primary transducer provides operation with one or two indicating devices ТЭ-Д, and ДЭМ-1 – with one, two or three indicating devices.

Ordering

When ordering, it is required to specify the following:

1. Description
2. Tachometer or primary transducer type
3. Kit number in case of kit delivery (as per Table 2)
4. ТУ designation

Examples for ordering the tachometer and its components

Electronic tachometer ТЭ-Д, climatic version ОМ5, installation kit No. 2, with two setpoints of lower (100 rpm) and upper (1,100 rpm) threshold values of the measured quantity:

“Electronic tachometer ТЭ-Д-ОМ5-К2-НУ100-ВУ1100 ТУ25-7304.0001-86”.

Electronic tachometer ТЭ-Д, climatic version ОМ4, installation kit 1 (without setpoints) when supplied for export: “Electronic tachometer ТЭ-Д-ОМ4-К1, Э ТУ25-7304.0001-86”.

Indicating device of the electronic tachometer ТЭ-Д, climatic version ОМ5:

“Indicating device ТЭ-Д-ОМ5 ТУ 25-7304.0001-86”.

Idem, if supplied for export: “Indicating device ТЭ-Д-ОМ5, Э ТУ25-7304.0001-86”.

Primary transducer ППЭ-Д1 of the tachometer ТЭ-Д: “Primary transducer ППЭ-Д1 ТУ 25-7304.0001-86”.

Idem, if supplied for export: “Primary transducer ППЭ-Д1, Э ТУ 25-7304.0001-86”.– page 98 of the Catalog

Overall and attachment dimensions