WIKA GDM 233.52.063 氣體密度表（GDM），63表圓，充氣

Gas density monitor with gas filling
Model 233.52.063

Gas density monitor with gas filling model 233.52.063

Applications
Gas density monitoring in closed SF6 gas tanks

Special features
■ Temperature-compensated pressure gauge with Bourdon tube
■ Suitable for outdoor use
■ Wetted parts from stainless steel
■ Local readout with alarm contacts
■ Hermetically leak-tight, therefore no negative impact by atmospheric pressure fluctuations and differences in altitude

Description
Gas density is a crucial operating parameter for high-voltage switchgears. If the required gas density is not present, safe operation of the plant cannot be guaranteed.
The WIKA gas density measuring instruments provide reliable warnings against dangerously low gas concentrations even in extreme environmental conditions.
If the gas density decreases due to a leakage the magnetic snap-action contacts, which are actuated by the pointer, switch reliably and with repeatable accuracy.

Conventional pressure gauges are not suitable here as the gas pressure changes depending on the ambient temperature, altitude and even atmospheric pressure.
The above factors together can amount up to 20 % of the working pressure and thus falsify the measurement significantly.
For this reason, all WIKA gas density measuring instruments are temperature compensated and hermetically sealed.

Specifications
Nominal size in mm
63

Accuracy
■ ±1 % at ambient temperature +20 °C
■ ±2.5 % at ambient temperature -20 … +60 °C and with calibration pressure in accordance with reference isochor (reference diagram KALI-Chemie AG , Hannover,
prepared by Dr. Döring 1979)

Scale range
■ -1 ... +1 bar
■ -1 ... +3 bar

Calibration pressure PE
To customer specification

Permissible temperature ranges
Operating temperature: -20 … +60 °C (gas phase)
Storage temperature: -50 … +60 °C

Alarm contacts and switching power
Number: max. 2 magnetic snap-action contacts
Switching function: Normally closed or normally open,
optionally with galvanic isolation.
Switch points: not adjustable
Maximum switching voltage: 250 V
Switching power: 30 V / 50 VA, max. 1 A
Material of the contacts: 80 % Ag / 20 % Ni, 10 mm
gold-plated

Switching accuracy in the temperature range
-20 … +60 °C

Switch point = calibration pressure PE:
As measuring span

Switch point ≠ calibration pressure PE:
Shifted parallel to calibration pressure

High-voltage test
2 kV, 50 Hz, 1 s (wiring against case)

Electrical connection
Attached cable: length 1 m, with glass bushing

Process connection
G ¼ B according to EN 837, back mount
Stainless steel
Wrench flat 14 mm

Pressure element
Stainless steel, welded
Gas-tight: leak rate ≤ 1 · 10-8 mbar · l / s
Test method: spectrometry of helium mass

Movement
Stainless steel
Bimetal link (temperature compensation)

Dial
Aluminium
The scale range is subdivided into red, yellow and green ranges

Pointer
Aluminium, black

Case
Stainless steel, filled with dry nitrogen
Gas-tight: leak rate ≤ 1 · 10-5 mbar · l / s
Test method: spectrometry of helium mass

Window
Acrylic plastic

Bezel ring
Bayonet ring, stainless steel, secured by means of 3 welding spots

Ingress protection
IP 65 per EN 60529 / IEC 529

Weight
approx. 0.25 kg

Options
■ Radial process connection
■ Galvanic isolation of the switch contacts
■ Laminated safety glass
■ Other scale ranges on request

歡迎來(lái)電訂購(gòu)WIKA GDM 233.52.063 氣體密度表（GDM），63表圓，充氣

電話:010-51669912 56291930 15910733293