American Magnetics 175 Industrial Level Transmitter (CE-Marked) - Manual (Page 8)

8 of 18
Instrument Specifications
Description Specification
Power Supply 12 – 30Vdc ±10%; 24Vdc nominal
Supply Voltage Effect Less than 0.01%/volt change
Ambient Temperature Range -40 °F to 176°F (-40°C to 80°C)
Humidity 99% non-condensing
Accuracy ±0.1% of span
Repeatability ±0.05% of span
Linearity ±0.1% of span
Resolution 0.01mA
Response Time 300 msec.
Temperature Effect ±0.01% of span/°F (0.018% of span/°C)
Data Entry 3-button keypad Operator
Interface
Display 2 Line by 8 Character LCD
Analog Output 4-20mA; 3.8 – 20.5mA overtravel; reversible
Error Indication 3.6mA, 22mA, or Hold last value; field selectable
Range 15 – 100,000pF
Damping 0 – 60 seconds; field adjustable in 1 sec. increments
Maximum Remote Cable Length 10 feet between the transmitter and the probe.
Probe Specifications
Description Specification
Process Temperature Range @ 0 psig (1 Bar) -435 °F – 180°F (-259°C – 82°C)
Process Pressure Range @ 100 o F (37 o C) Vacuum to 1,000 psig
Operating Principle
The probe materials and the media form a capacitor with the media being a portion of the
dielectric (non-conductive media applications). As the level of the media changes over the
Active Length, a corresponding change in capacitance occurs. The Model 175 transmitter
measures this change, compares it to the calibrated values, and calculates and displays the
level of the media. A special insulated probe is required for conductive media. The probe
insulation then serves as the dielectric.
Installation
Unpacking
Upon receiving the Model 175 transmitter, check all components carefully for damage incurred
in shipping. If damage is evident, or suspected, do not attempt installation. Notify the carrier
immediately and request a damage inspection. Check each item against the packing list.
Mounting Location
Model 175 transmitters should be mounted in a location that is a free as possible from
mechanical shock, vibration, and corrosive atmospheres. The area should have an ambient
temperature in the range of –40
°F to 176°F (-40°C to 80°C).