ĐỒNG HỒ ĐO ÁP SUẤT WIKA 230.25 with 851.3 Switch

Design: ASME B40.100
Size: 2” (50 mm)
Accuracy Class:
      Gauge: ± 2/1/2% of span (ASME B40.100 Grade A)
      Switch: ± 5% of span at Switch Point
Ranges:
      Vacuum / compound to 30”Hg/0/300 psi
      Pressure from 60 psi up to 5000 psi or other equivalent units of pressure or vacuum
      60 psi minimum span
Working Pressure:

      Steady: 3/4 full-scale value

      Fluctuating: 2/3 full-scale value

      Short time: full-scale value

Operating Temperature:
      Ambient: -40°F to +140°F (-40°C to +60°C)
      edium: +212°F (+100°C) maximum
Temperature Error: Additional error when temperature changes from reference temperature of 68°F (20°C) ±0.4% for every 18°F (10°C) rising or falling. Percentage of span.
Weather Protection: Weather resistant (NEMA 3 / IP 54)
Pressure Connection Material:

      Face-seal nut, 316 SS, UNS S20161
      Face-seal gland 316L SS VOD or VIM/VAR
Position:

      Lower mount (LM)
      Center back mount (CBM)
Type of Connection:

      Face-seal fixed male, swivel male or female
      Wetted Surface Finish: Ra < 0.25µm (Ra < 10µinch)
Bourdon Tube Material: 316L SS
      30”Hg (vac) to 5000 psi, C-type
      Helium leak tested 1 x 10-9 scc/sec (inboard)
Socket Material: 316L VIM/VAR electropolished
      Ra < 0.25µm (Ra < 10µinch) - internal
Movement: Stainless steel

Dial: White aluminum with stop pin and black lettering
Pointer: Black aluminum
Case: 304 SS, electropolished
Window: Polycarbonate: twist-lock
Alarm contact:
      Reed contact Model 851.XX; The switching function is identified by the index ‘3’. 851.3 = One SPDT contact. 851.33 = Two SPDT contacts
      Setting the switching point In order to adjust the switching point, the gauge should be disconnected from the monitoring device and the window unscrewed.
      The switches are set via the mark pointer(s) on the dial‘s circumference. The set value of the switching point is adjustable up to 80 % of the scale range, 15% from low end and 5% from high end of scale.
Electrical load:

      Max. switching voltage: 24 VDC / VAC

      Max. load: 10 W

      Max. current: 0.5 A

      Electrical connection with cable gland M8 x 1.25, cable output 3 m long (10 ’), conductor cross section 0.14 mm2 (26 AWG), flying leads, the terminal assignment is stated on the pressure gauge’s connection plate