Series AT-3000MR/MRS ATEX/IECEx Approved Photohelic® Switch/Gage
Using solid state technology, the Series AT-3000MR/MRS ATEX/IECEx Approved Photohelic® Switch/Gage combines the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage. Gage reading is unaffected by switch operation and will indicate accurately even if power is interrupted. AT102-3000MR series employ versatile electromechanical relays with low amperage ratings-ideal for dry circuits. For applications requiring high cycle rates, choose AT102-3000MRS models with SPST (NO) solid state relays. Easy to adjust set point indicators are controlled by knobs located on the gage face (accessible opening case after de-energizing instrument). All models provide both low and high limit control. Compatible with air and other non-combustible, non-corrosive gases. Flameproof enclosures are available with glass window which allows for viewing of set point needles and process pressure. Compatible with air and other non-combustible, noncorrosive gases.
Important notes for installation:
• Cables must be fitted through 1/2" NPT cable gland or ATEX/IECEx conduit (not supplied with instrument).
• Make sure after cabling to close tight cover and cable gland, in order to maintain IP66 rating.
• Open cover only after de-energizing instrument.
Attention: Check local safety rules and warnings on unit and manual for a correct use of the instrument in hazardous areas.
Please see Series 3000MR/MRS for non-ATEX/IECEx approved.
Product Applications
- Hazardous area pressure measurement and switching
- Pneumatic conveying
- Air conditioning systems
- Clean rooms
- Fume exhaust systems
Specifications
- Service:
- Air and non-combustible, compatible gases.
- Wetted Materials:
- Consult factory.
- Housing Material:
- Aluminum.
- Finishing:
- Texture epoxy coat RAL7015.
- Accuracy:
- ±2% of FS at 70°F (21.1°C). ±3% on -0, -60 Pa and ±4% on -00 models.
- Pressure Limits:
- See pressure limit chart on the catalog page.
- Temperature Limits:
- 20 to 120°F. (-6.67 to 48.9°C). Option LT low temperature to -20°F (28.8°C) (Note: Product temperature limits differ from case).
- Power Requirements:
- 24 VDC, regulated ±10%.
- Electrical Wiring:
- Screw terminals.
- Mounting Orientation:
- Diaphragm in vertical position.
- Enclosure Rating:
- IP66.
- Process Connections:
- 1/8" NPT female brass (SS optional).
- Electrical Connections:
- Two 1/2" NPT female. Cable gland not included.
- Dial Size:
- 4" (101.6 mm).
- Set Point Adjustment:
- Adjustable knobs on face behind enclosure cover. Follow instructions and safety warnings to open cover.
- Weight:
- 13.2 lb (6 kg).
- ATEX Certificate:
- INERIS 21ATEX0033X.
- IECEx Certificate:
- IECEx INE 21.0064X.
- Compliance:
- ATEX:
0080 
II 2G Ex db IIC T5, T6 Gb -60°C ≤Ta ≤+50°C (T6) -60°C ≤Ta ≤+60°C (T5) II 2D Ex tb IIIC T75 °C Db;
IECEx: Ex db IIC T5, T6 Gb -60°C ≤Ta ≤+50°C (T6) -60°C ≤Ta ≤+60°C (T5) Ex tb IIIC T75°C Db. - SWITCH SPECIFICATIONS (3000MR)
- Switch Type:
- Each set point has 1 Form C relay (SPDT).
- Relay Contacts:
- (resistive load) 1 Form C rated 1.0 A @ 30 VDC, 0.3 A @ 110 VDC or 0.5 A @ 125 VAC. Gold over clad silver - suitable for dry circuits.
- SWITCH SPECIFICATIONS (3000MRS)
- Switch Type:
- Each set point has a solid state relay.
- Switching Voltage:
- 20 to 280 VAC (47 to 63 Hz).
- Switching Current:
- 1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST NO.
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