Indicating and signaling draft gauges ДТ-С2, ДТ-СН, ДТ-СВ,head gauges ДН-С2, ДН-СН, ДН-СВ, and draft-head gauges ДГ-С2, ДГ-СН, ДГ-СВ

Membrane indicating draft gauges, ДТ-С2, ДТ-СН, ДТ-СВ, head gauges, ДН-С2, ДН-СН, ДН-СВ, draft-head gauges ДГ-С2, ДГ-СН, ДГ-СВ, are registered in the State Register of Measuring Instruments under No. 13950-94

Designed

for measuring vacuum gage and gauge pressure of air, natural and other gases, nonaggressive to contacted materials, and for switching external electrical circuits in systems of general purpose industrial automation, including boiler house automation, upon reaching the threshold preset value of measured pressure.

Devices ДТ-С2, ДН-С2, ДГ-С2 are fitted with two signaling devices (hereinafter – setpoints) for lower and upper threshold values of measured pressure (devices with two setpoints).

Devices ДТ-СН, ДН-СН, ДГ-СН have a low setpoint to deliver a signal upon reaching the lower threshold value of measured pressure (devices with low setpoint).

Devices ДТ-СВ, ДН-СВ, ДГ-СВ have a high setpoint to deliver a signal upon reaching the upper threshold value of measured pressure (devices with high setpoint). – page 48 of the Catalog

General specifications

Limits of the basic allowable error in indication and alarm actuation, expressed in percent of the indication range

Page 49 of the Catalog

Current consumption is 25 mA as maximum per setpoint.

It is recommended to use power and switching unit БПК-24 to ensure power supply.

Values of switched parameters in the external electrical circuit are as follows: DC voltage is 1 to 30 V, at load current 0.1 to 100 mA.

Leak current of open switching element is 100 µA as maximum at voltage of 30 V.

Closed state of the device switching element corresponds to a normal value of measured pressure.

If there is no power supply, the device switching element is open.

Minimum area between the setpoints of devices ДТ-С2, ДН-С2, ДГ-С2 shall not exceed 10% of indications range. Herewith, this range of the lower setpoint shall be within (0–75)%, and the upper setpoint range – within (25–100)% of indications range.

Devices ДТ-СН, ДН-СН, ДГ-СН, ДТ-СВ, ДН-СВ, ДГ-СВ ensure setting of a setpoint in the whole measurement range.

Overall and attachment dimensions 

Overall dimensions are 72х144х175 mm (cutout in the board – 66х138 mm)

As per environmental resistance there are climatic versions as follows

• У3 – for operation at a temperature from minus 5 to plus 50°С and relative humidity up to 98% at 25°С;
• T3 – for operation at a temperature from minus 5 to plus 50°С and relative humidity up to 98% at 35°С.

Calibration interval is 1 year.

Membrane indicating draft gauges, head gauges, draft-head gauges are manufactured as per ТУ 311-00227471.038-94.

Weight is 0.7 kg as maximum.

When ordering, it is required to specify the following

1. Description
2. Designation
3. Indication range
4. Climatic version designation
5. ТУ designation

Example of an order

Draft gauge ДТ-СН with indication range from 0 to 1.6 kPa with climatic version У3:

“Membrane indicating draft gauge ДТ-СН-1,6кПа-У3 ТУ 311-00227471.038-94”.