modus m series general eastern differential pressure transmitters the modus m series family of differential pressure transmitters measure low pressures, and feature a variety of analog signal outputs with low power consumption. a wide selection of standard pressure ranges and electrical ratings is available. these transmitters feature no moving parts to wear out, reliable long term stability, and are virtually position insensitive. the modus m series transmitters are typically used for monitoring cleanroom pressures, hvac, velocity pressures, bubbler level systems, and leak detection; as well as flter differential, draft, fume hood, and other low pressure applications. the transmitters are housed in a compact heavy duty, gasketted, cast aluminum enclosure designed to type 4/ip 65. the die cast aluminum enclosure incorporates a recessed neoprene gasket to prevent ingress of moisture or dust. wall mounting holes are enclosed in the cast aluminum box and concealed by the cover. the wall mounting holes and the cover attaching screws are outside the gasketted area. access to the terminals is made through knockouts on the front of the box. a choice of two knockouts and three hole sizes is available to accommodate usage of 1/2 in (12.70 mm) conduit and metric sizes pg11 and pg13. pluggable terminal block connectors are provided with captive wire protection and captive terminal screws. the modus m series includes the m30 series: ? two-wire ? dc voltage in ? 4 to 20 ma out the span or zero adjustment is performed with a 20 turn potentiometer for fne resolution. the modus m series transmitters comply with the european requirements of emc directive 2004/108/ec, lvd 2006/95/ec and ped 97/23/ec. a mphenol advanced sensors
operation the pressure sensing element is a differential capacitance cell for pressure measurements ranging from 0.1 in to 5 in (3.04 mm to 127 mm) of water (25 kpa to 1.0 kpa), or piezoresistive (silicon) sensors for pressure measurements ranging from 5 in (127 mm) of water to 10 in (1.0 kpa to 2.5 kpa). the capacitance cell is capable of sensing very low, negative or differential pressures. a very lightweight, responsive diaphragm within the cell defects a small amount when a small pressure is applied. this defection results in a change in capacitance which is then detected and amplifed electronically. the piezoresistive sensor is a solid state device designed in a wheatstone bridge confguration. when pressure is applied to the device, the resistance of the bridge changes by a small amount. the output of the bridge is ratiometric to the supply voltage, and a small change in resistance is detected as a change in output voltage. standard pressure ranges us units pressure code pressure range maximum safe momentary overpressure 03e 0 to 0.300 in h20 - 04e 0 to 0.500 in h20 - 05e 0 to 1.00 in h20 - 06e 0 to 2.00 in h20 20 inh2o 07e 0 to 3.00 in h20 - 08e 0 to 5.00 in h20 - metric units, millimeters of water pressure code pressure range maximum safe momentary overpressure 03m 0 to 7.50 mm h20 - 04m 0 to 10.00 mm h20 - 05m 0 to 25.0 mm h20 - 06m 0 to 50.0 mm h20 500 mm 07m 0 to 75.0 mm h20 - 08m 0 to 100 mm h20 - metric units, pascal pressure code pressure range maximum safe momentary overpressure 03p 0 to 75.0 pa - 04p 0 to 100.0 pa - 05p 0 to 250 pa - 06p 0 to 500 pa 5 kpa 07p 0 to 750 pa - 08p 0 to 1.00 kpa -
m series specifcations performance accuracy 1% of span (including non-linearity and hysteresis) calibration traceable to national institute of standards and technology (nist) environmental operating temperature range 32f to 115f (0c to 45c) storage temperature -20f to 160f (-30c to 70c) effect of temperature on zero 0.05%/c effect of temperature on span 0.02%/c operating humidity range 10% to 90% rh, non-condensing shock resistance 10 g (11 ms) vibration resistance 5 g to 50 hz electrical connectors polarized euro-plug/connectors connections pluggable terminal block for wire, 14 to 26 awg material glass flled polyester physical dimensions 3.56 in x 4.54 in x 2.18 in (90 mm x 115 mm x 55 mm) material aluminum alloy #a380 cover screws m4 stainless steel, non-magnetic finish black epoxy paint knockout choice of 2 holes. knockout hole sizes 1/2 in (12.70 mm) conduit, pg11 or pg13. cable glands not included. pressure port connection 3/16 in (4.57 mm) diameter suitable for: ? 1/8 in (3.04 mm) id tygon? or polyurethane tubing 0.11 in to 0.15 in (3 mm to 4 mm) ? 1/4 in (6.35 mm) od polyethylene tubing 0.23 in (6 mm) weight 1.27 lb (576 g) maximum integral flters at both ports. measures differential, gage pressure or vacuum. suitable for air or inert gases. 2 mounting holes for #8 (4 mm) maximum screw 2.4 in (60 mm) mounting hole 0.6 in (15 mm) 0.26 in (6.5 mm 4.0 in (102 mm) mounting holes 4.54 in (115 mm 3.6 in (90 mm) g11, pg13 or 1/2 conduit holes 1.6 in (40.5 mm) 1.2 in (30.5 mm) 2.18 in (55 mm) 1.37 in (35 mm) 1.35 in (34 mm) high low 2.5 in (63.5 mm) 3.4 in (86.5 mm) pressure port
m30 specifcations two-wire, 4 to 20 ma output electrical supply voltage 11 to 32 vdc (see diagram below for maximum loop resistance) protected against reversal of polarity. output limited to approximately 3.85 ma at low end of span and approximately 27 ma at upper end of span. 11 to 32 v dc 1500 1000 500 0 loop resistance ( w* maximum resistance operating region 0 10 20 30 40 power supply voltage *loop resistance wire resistance receiver resistance power supply receiver 0 to 1050 w enclosure ground wire wire modus m30 series schematic diagram ordering information m30 code input pressure (ip) x see standard pressure ranges tables on page 4 0 none code knockout quantity (kq) 1 one hole 2 two holes code knockout size (ks) r 1/2 in (12.7 mm) conduit s pg 11 t pg 13 m30 - ___ - ___ - ___ - ___ typical model number. *if the measured differential pressure is expected to go from positive to negative, a transmitter with offset (elevated zero) should be ordered. three options are available 0 no offset . at zero differential pressure, the output signal is: 4 ma (4 to 2 ma range) ressure ecursion to 1 of range, see standard pressure ranges tables on page 4 a 1/4 span offset. at zero differential pressure, the output signal is: ? 8 ma (4 to 20 ma range) b 1/2 span offset. at zero differential pressure, the output signal is: ? 12 ma (4 to 20 ma range) to order: determine the positive pressure range. from standard pressure ranges table on page 4, fnd the corresponding pressure code. add the required offset (none, a, or b). for eample, a, is a transmitter ith a maimum range of 1 in of 2 at 2 ma and a minimum range of . in of 2 at 4 ma. code offset (o)* a 1/4 offset b 1/2 offset aas-920-293g-03/2014 www.amphenol-sensors.com ? 2014 amphenol corporation. all rights reserved. specifcations are subject to change without notice. other company names and product names used in this document are the registered trademarks or trademarks of their respective owners. a mphenol advanced sensors
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