Deltabar S
Hauser
27
Process isolating diaphragms
for materials with hydrogen
build-up (Gold-Rhodium
coating)
With regard to materials in which hydrogen build-up takes place, hydrogen atoms can diffuse through the
metalic process isolating diaphragms. This can result in incorrect measurement results.
Hauser offers process isolating diaphragms with Gold-Rhodium coating for this application.
71 ff "Ordering information PMD75",
70 "Ordering information FMD77" or
76 "Ordering
information FMD78", feature 60 "Process isolating diaphragm material".
Operating conditions (Environment)
Ambient temperature range
• PMD75, FMD77, FMD78: –40...+85°C (–40...+185°F), devices for lower temperatures on request
• PMD70, FMD76: –20...+85°C (–4...+185°F)
• On-site display: –20...+70°C (–4...+158°F)
Extended temperature application range with restrictions in optical properties such as display speed and
contrast: –40...+85°C (–40...+185°F)
• Separate housing: –40 to +60°C (–40 to +140°F)
For devices for use in hazardous areas, see Safety instructions, Installation or Control Drawing (
sections "Safety Instructions" and "Installation/Control Drawings").
The device can be used in this temperature range. The values of the specification, such as thermal change, may
be exceeded.
See also DIN 16086.
Storage temperature range
• –40...+ 90°C (–40...+194°F)
• On-site display: –40...+85°C (–40...+185°F)
• Separate housing: –40 to +60°C (–40 to +140°F)
Degree of protection
•
67 ff, feature 30 "Housing, Cable entry, Protection".
• Degree of protection IP 68 for T17 housing: 1.83 mH
2
O for 24 h
• Seperate housing
Climate class
Class 4K4H (air temperature: –20...55°C/–4...+131F, relative humidity: 4...100%) fulfilled as per
DIN EN 60721-3-4 (condensation possible)
Vibration resistance
Electromagnetic compatibility
• Electromagnetic compatibility to EN 61326 and NAMUR recommendation EMC (NE21). For details refer
to the declaration of conformity.
• With enhanced immunity against electromagnetic fields as per EN 61000-4-3:
30 V/m with closed cover (for devices with T14 or T15 housing)
• Maximum deviation: < 0.5% of span
1
• All EMC measurements were performed with a turn down (TD) = 2:1.
Device/Additional option Housing
Test standard
Vibration resistance
PMD70/
FMD76
optional on-site display on
the side (T14)
GL
guaranteed for:
2...18 Hz: ±4 mm;
18...500 Hz: 5 g in all 3 planes
PMD75
optional on-site display on
the side (T14)
IEC 61298-3
guaranteed for:
10...60 Hz: ±0.35 mm;
60...2000 Hz: 5 g in all 3 planes
PMD75
optional on-site display on
the top (T15)
with mounting bracket
IEC 61298-3
guaranteed for:
10...60 Hz: ±0.15 mm;
60...500 Hz: 2 g in all 3 planes
1)
Larger deviations possible with PMD70 with 25 mbar or 100 mbar sensor
