隔爆型電接點(diǎn)壓力表使用說(shuō)明書(shū)

1、隔爆型電接點(diǎn)壓力表使用說(shuō)明書(shū)Explosion-proof Type Pressure Gauge with Electrical ContactOperational Instructions 1The Explosion-proof Type Pressure Gauge with Electrical Contact is designed according to the nationalstandard “Electric Equipment in Explosive Gas , i.e. Part I Common Requirements of2” GB3836.1-2000,

2、Part II the related regulation of GB 3836.2-2000 for explosion-proof type d” products andrelative industrial standards, and JB/T9273-1999 requirements for “Pressure Gauge With Electrical .Meanwhile it is manufactured as per the approved drawing and technical documents approved by the nationalstated

3、inspection institution. The explosion-proof marks for Explosion-proof Type Pressure Gauge with Electrical Contact are as below:ExdIIC T4 (in which the Ex stands for mark, d stands for explosion-proof, IIC stands for category and T4 standsfor temperature arrangement),which is applicable to the explos

4、ive gas environment with media pressure at 70 and below measuredtemperature.The explosion-proof Type Pressure Gauge with Electrical Contact is equipped with multi functions as automaticcontrol, alarm, signal distant transfer and other functions for the measured pressure with the help of theelectrics

5、ignal equipment and electrical equipment with the related explosion-proof performance for. The grade of gaugecase is for IP65.。 The gauge is composed of explosion-proof case and build-in pressure gauge with electrical contact. Whenthe flammable gas mix in gauge case explodes causedby the spark or el

6、ectric arc (generally caused by the electric signal device with pressure gauge with electricalcontact),the explosive gas outside the case wont explode accordingly, thus achieving the explosion-proof purpose. 、級(jí) A V A 、ii. Please see the overall dimension as below、iii. Wiring Methods as Shown in Diag

7、ram II Diagram II Wiring Diagram1. Indicating Needles for Upper and Lower Limit-Yellow Line2. Conducting Needles (Contact) for Upper Limit-Red Line3. Conducting Needles (Contact) for Lower Limit -Blue Line4. Earthing2、 iv. The inner diameter of the inlet rubber seal shall be . It shall be equipped w

8、ith 500VBX rubber-sheathed2cord and 4X1 cab-type cable (with outer diameter of 9.8). The cable incoming line shall meet the requirementsof IP44. Operation, Maintenance and Inspection Gauge Installation: the ambient temperature shall be between -40 and 70, with sea-level heightshall not above 2000m (

9、atmospheric pressure for 0.08-0.11Mpa). The gauge shall be installed vertically, beinghorizontal to the measuring point.、After the completion of the gauge electric line, screw the clamp nuts, take careful inspection and perform testrun.、；In case of measuring the steady pressure, the gauge may be tur

10、ned to 3/4 of the upper limit; in case ofmeasuring the alternating pressure, the gauge may be turned to 2/3 of the upper limit; in case of measuring thenegative pressure, there is no such limit.、The power source shall be cut off before opening the outlet box or adjusting the upper or lower limit.Und

11、er the normal application circumstance, the gauge shall be inspected regularly, i.e. once at leastevery six months. Should there be a sudden deterioration of the gauge (pressure relief for corrugate pipeleakage; fusion welding or severe oxidation of the contact highly influence the reliability of wi

12、re connectionand disconnection; loosening or malfunction of the needles), the gauge shall be inspected or replacedimmediately.、The gauge shall be kept in dry and clean place during the process of operation.、The reliability of the explosion-proof gauge mainly depends on the bearing strength of the ca

13、se and thequality of the explosion-proof surface. Therefore, pay much attention to the explosion-proof surface and avoidcollision and scuffing during the process of installation, operation and maintenance, specially asdisassembling the wiring box or performing the overall maintenance. It is forbidden to paint on theexplosion-proof surface.、In case of having a vague understanding of the basic knowledge of the explosion-proof gauge or itsdesign features or requirements, the user s