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노점계 (CERMAX)

 

 

 

 

모델

:

CERMAX

제조사

:

MICHELL

원산지

:

영국
 

 
상품 상세 설명
 
Michell Instruments has always maintained a strong tradition in producing portable hygrometers for rapid, easy determination of moisture content in compressed air and process gases.

Easy Operation

CERMAX is extremely easy to use. The instrument is fully self-contained in a lightweight moulded carry case. No external services are required. Simply connect the sample gas to the Swagelok® inlet port, turn on the power and and within seconds CERMAX is ready to display the measured dewpoint of the sample gas under test. No special programming of electronics is needed. The advanced user interface allows you to decided whether to make a simple measurement (default mode) or to perform more complex functions, like pressure compensation, range selections, input scaling, data logging etc.

High Accuracy and Repeatability

The advanced design of the Michell Ceramic Moisture Sensor coupled with extremely competent measurement circuitry give CERMAX class leading accuracy and repeatability. With a standard measurement range from -100 to +20°C dewpoint and indication down to -120°C and up to +30°C dewpoint, CERMAX offers measurement accuracy of: +/-1°C dewpoint in the range +20 to 59°C dewpoint +/-2°C dewpoint in the range -100 to -60°C dewpoint Resolution is 0.1°C dewpoint across the entire calibarted range.

Fast Response

Users always rate a fast speed of response as a key feature of a portable hygrometer, and for obvious reasons, CERMAX has been designed particularly with this feature in mind. With an inherently fast Ceramic Moisture Sensor and a minimum volume stainless steel sample housing CERMAX has a head start on the competition. Add to this CERMAX's user selectable field operation mode which allows even ppm level measurements to be made in a few minutes and the result is a World Class hygrometer woth superior performance.

Lightweight Construction

Weighing a total of just 3Kg, CERMAX is one of the lightest portable instruments available. However this is not at the expense of robustness. The strong moulded polyurethane carry case gives the optimum combination of physical strength and low mass and is practical too, giving IP65 protection rating (NEMA 12 equivalent).

User Friendly Display

CERMAX provides a user-friendly programmable display interface. On power up, the instrument default mode gives an instant display of the measured dewpoint, after system initialisation. For the user who who wishes to utilise the instrument's more sophisticated functions, a drop down menu system allows easy selection of a secondary input (external temperature or pressure transducer), display of alternative engineering units, pressure or temperature corrections, tagging and logging of measured data and downloading to a host device such as a PC.

Data Logging Facility

Portable hygrometer users tend, almost by definition, to want to monitor how a particular process dewpoint condition may change over time. CERMAX makes this task simple. No longer does the operator need to locate and set up a chart recorder or external logging device. CERMAX does it all. Built into the instrument is a logging system which can store up to 10,000 measurement points. The logger will store both dewpoint and the second process variable (temperature or pressure), along with tag and time information. Logging start time, interval and test duration are all selected from the instrument's drop down menu. Once the log has been taken, data can be downloaded onto a PC using Windows'TM Terminal or a similar data transfer program. Data can then be easily sorted, analysed and charted using a spreadsheet or database program.

Intrinsically Safe

CERMAX I.S., in distinctive blue livery, is CENELEC certified by BASEEFA (EECS) for use in hazardous areas to EEx ia llC 155°C (T3). This allows the advanced features and rugged reliability of CERMAX to be applied within petrochemical and natural gas plants for measurements of non-flammable and flammable gases. On a refinery, LNG plant, offshore platform or natural gas terminal, CERMAX I.S. provides the site chemist and operational staff with an effective means to check the moisture concentration at any point in their process. CERMAX I.S. is also perfect for any industrial application requiring safe measurement of flammable gases, such as hydrogen used as a coolant for electricity generator sets or as a controlled furnace atmosphere for heat treatment of metals. CERMAX I.S. is also certified through Factory Mutual (USA) to Intrinsically Safe CL1, Div1, GpA, B, C, & D T3C and CSA (Canada) to Ex ia IIC T3 (Class 1, Zone 0, Group IIC).

Long Battery Life

CERMAX uses a sealed rechargeable battery pack which gives an average usage time of more than 24 hours between charges, at normal room temperature.

SPECIFICATIONS

Sensor

Michell Ceramic Moisture Sensor

Gas wetted components

316 stainless steel

Gas connections

1/8" Swagelok® inlet and outlet couplings

Display

Standard version 240 x 64 dot matrix LCD
I.S. version 4 line x 40 character LCD

Range

Calibrated from -100 to +20°C dewpoint; readings to -120 and +30°C dewpoint

Accuracy

+/-1°C from -59 to +20°C dewpoint; +/-2°C from -100 to -60°C dewpoint

Resolution

0.1°C dewpoint, 3 significant figures for other units

Units

°C, °F, K dewpoint
ppmV
ppmW for air, N2, H2, SF6, CO2, natural gas
gm-3
pounds per million standard cubic feet (natural gas)

Secondary input

0-20mA or 4-20mA for temperature or pressure (standard version only)

Data storage

Up to 10,000 samples of primary and secondary variable, time and date stamp and ident number

Communications

RS232C for stored data

Power

Internal re-chargable battery pack (removable) charged by external a.c. powered 6V charger (supplied). 24 hours normal operation between charges.

Case

Custom polyurethane case with integral padded carry handles

Dimensions

250W x 300D x 150H mm approx

Weight

3 kg

Ingress protection

IP65, NEMA 12

Operating temperature

-20 to +50°C
(-20 to +40°C for I.S. version)

Storage temperature

-65 to +65°C

Operating pressure

Max 30 MPa

Flow rate

0.5 to 5 Nlmin-1

Cermax dimensions

Intrinsic safety

Certified to EEx ia llC 155°C (T3) through BASEEFA (EECS). Certificate No.Ex98E2087. FM: Certificate J.1.6D5A0AX. CSA: File No. LR 114519-1

Optional items

Carry bag
Shoulder strap
Sampling system
Spare battery pack

 

 

 

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