Dwyer Instruments CAM Series User manual

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

The Series CAM Compressed Air Meter operates by the calorimetric

measuring principle to detect the standard volume flow of operating

compressed air. It is designed specifically to evaluate the current flow

rate and the current consumed quantity in compressed air systems. With

an easily programmable digital display, this unit offers a quick, accurate

readout. The Series CAM is constructed of high-grade materials and is

virtually maintenance free.

Read the product description before installing the unit, to ensure that the

product is suitable for your application without any restrictions. Suitably

qualified personnel must perform work on compressed air equipment.

Ensure that the installation is at a standstill, before mounting compo-

nents into or removing them from compressed air equipment. Ensure

that neither people nor objects are endangered by moving parts before

commissioning / restart of the installation. Non-adherence to the operat-

ing instructions or technical data can lead to personal injury and/or dam-

age to property. In all applications, check compliance of the product

materials with the media to be measured.

Series CAM Compressed Air Meter

Specifications - Installation and Operating Instructions

Bulletin C-32

SPECIFICATIONS

Service: Compressed air; Air quality (see chart 1).

Wetted Materials: Stainless Steel (304S15), ceramics, glass passivat-

ed, PEEK, polyester, Fluoroelastomer, anodized aluminum.

Response Time: < 0.1 seconds.

Temperature Limit: 32 to 140°F (0 to 60°C).

Accuracy*: 1.41 ±3% +0.3% FV; 3.44 ±6% MV +0.6% FV.

Pressure Limit: 232 psig (16 bar).

Humidity Limit: 90% RH.

Power Requirements: 19-30 DC.

Output Signal:

Output 1: PNP Open Collector: VOUT(max)=30 VDC /

ISINK(max)= 250mA

Output 2: 4-20mA (scalable) or PNP Open Collector.

Loop Resistance: 500 ohms.

Current Consumption: <100 mA.

Electrical Connections: 4 pin M12(Micro) Cable Connection.

Process Connections: 1/2˝ , 1˝ and 2˝ NPT.

Display: 4-digit alphanumeric red LED

Enclosure Rating: IP65 (NEMA 4X).

Mounting Orientation: Vertical, Horizontal, Side with pipe length fac-

ing left.

Ranges:

CAM-10: 1.4-412.0 SCFM;

CAM-20: 0.2-44.1 SCFM;

CAM-30: 1.0-132.4 SCFM.

Weight:

CAM-10: 12.5 lb;

CAM-20: 2.35 lb;

CAM-30: 4.16 lb.

Agency Approvals: CE.

*Ref. Chart 1 for DIN ISO 8573 Standards

e.g. 1.4.1. implies

1 = 0.01mg/m3oil content

4 = 15 µm particle size and 8 mg/m3particle density

1 = -70°C dew pt., 3 mg/m3residual water

Class

Max. Residual WaterMax. Residual Dust

Max. Oil

Content

Residual

Water g/m3

0.003

0.117

0.880

5.953

7.732

9.356

Pressure Dew

Point °C

-70

-40

-20

+10

Dust Concentration

mg/m3

0.1

–

Particle Size

mg/µm

0.1

–

Oil Content

mg/m3

0.01

0.1

–

Chart 1

3-1/32

[76.99]

4-3/8

[111.13]

3-15/16

[100.01] M12 x 1

MODEL

CAM-10

CAM-20

CAM-30

10-53/64

[275.3]

8-9/32

[210.34]

14-49/64

[375.05]

18-45/64

[475.06]

11-13/16

[300.04]

18-45/64

[475.06]

2 NPT

1/2 NPT

1 NPT

5-1/4

[133.35]

3-1/32

[76.99]

3-31/64

[88.5]

Ø2-1/64

[Ø51.2]

Ø41/64

[Ø16.27]

Ø1-5/64

[Ø27.38]

DIMENSIONS

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ELECTRICAL CONNECTION

A suitably qualified electrician must connect the unit. Voltage supplied

according to EN50178, SELV, PELV. The device shall be supplied from

an isolating source and protected by an overcurrent device such that the

limited voltage circuit requirements in accordance with UL 508 are met.

Disconnect power before connecting the unit as follows in Figure 2.

Disconnect power before connecting the unit as follows:

INSTALLATION

Location:

Select an area where the process temperature will remain between 32

and 140°F (0 to 60°C). Preferred mounting location is downstream from

the cold dryer, near the load. If compressed air is fed into the main pipe

through parallel pipes, the unit should be mounted in the main pipe.

Position: The unit may be positioned vertically, horizontally, and on its

side with the pipe length left. Avoid positioning the unit on its side with

the pipe length to the right. This may jeopardize the accuracy:

Mounting: To achieve the specified measurement accuracy, the follow-

ing mounting conditions must be adhered to: defined inflow/outflow pipe

lengths, defined flow cross-sectional area, fixed installation depth and

correct positioning of the measuring elements. Integrate the pipe length

so that the direction of flow and the marking arrow show in the same

direction. In case of disturbances at the inflow side additional baffled

pipes are recommended:

MAINTENANCE

After mounting, wiring and programming check whether unit operates

correctly. Unit is maintenance free for media which will not adhere to

measuring probes. Occasionally, probes should be visually checked for

build-up. If necessary, clean probes with a suitable liquid (e.g. alcoholic

solution). Avoid mechanical damage to measuring probes.

Figure 1

Figure 3

Core socket colors

1 = BN, 2 = WH (white), 3 = BU (blue), 4 = BK (black).

Figure 2

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Display Key Functions:

Figure 4

Chart 2

*To decrease the value, cycle past the maximum value, and the setting will restart

from the minimum.

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PROGRAMMING

Select the display unit (Uni) before setting the values for the parameters.

This avoids rounding errors generated internally during the conversion of

the units and enables exact setting of the values. The setting at the fac-

tory is Uni=CFH.

If no button is pressed for 15 seconds during the setting procedure, the

unit returns to the Run Mode with unchanged values.

The unit can be electronically locked to prevent unwanted adjustment of

the set parameters by pressing both push buttons until “LOC” is dis-

played. With the unit in the locked state “LOC” is indicated briefly when

you try to change parameter values. To unlock press both push buttons

until “ULO” is displayed. Units are delivered from the factory in the

unlocked state.

OPERATING MODES

Run Mode:

Normal operating mode. Unit will perform its measurement and evalua-

tion functions and provide output signals according to set parameters.

Totalizer adds pulses of consumed quantity and displays them as cur-

rent consumption value since last reset. Totalizer stores intermediate

values every 10 minutes as well as elapsed time of set automatic reset.

After a voltage dip this value is available as the current count of the total-

izer (possible data loss can be maximum 10 minutes). Display indicates

current measured values, yellow LED’s signal switching status of out-

puts. Display unit can be temporarily changed (press “Set” button briefly,

after 15 seconds unit returns to display unit set in menu point Uni).

Display Mode:

Indicates parameters and set parameter values. When “Mode/Enter”

button is pushed briefly, unit passes to Display mode, which allows para-

meter values to be read. Unit’s internal sensing, processing, and output

functions continue as if in Run mode. Parameter names are scrolled with

each press of “Mode/Enter” button. When “Set” button is pushed, corre-

sponding parameter value is displayed for about 15 seconds. After

another 15 seconds, unit returns to Run mode.

Programming Mode:

Setting parameter values: While viewing a parameter value pressing the

“Set” button for more than 5 seconds causes unit to enter programming

mode. Alter parameter by pressing “Set” button and confirm new value

by pressing “Mode/Enter” button. Internal sensing, processing, and out-

put functions continue as if in Run mode with original parameter values

unless a new value is confirmed. Unit returns to Run mode when no but-

ton has been pressed for 15 seconds.

ADJUSTABLE PARAMETERS

C-32:Magnesense bulletin 9/24/09 11:48 AM Page 5

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DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: 219/872-9057 e-mail: [email protected]

Hysteresis Function:

Keeps switching state of output stable if flow rate varies about preset

value. With flow rate rising, output switches when switch-on point has

been reached (SPx). With flow rate falling, output does not switch back

until switch-off point (rPx) has been reached. To adjust hysteresis: set

switch-on point, then set switch-off point at requested distance.

Window Function:

Enables monitoring of a defined acceptable range. When flow rate varies

between switch-on point (SPx) and switch-off point (rPx), output is

switched (window function/NO) or not switched (window function/NC).

Width of window can be set by means of the difference between SPx and

rPx. SPx=upper value, rPx=lower value.

Scaling measuring range (analog output):

Analog start point (ASP) is the measured value at which the output sig-

nal 4 mA is defined. Analog end point (AEP) is the measured value at

which the output signal 20 mA is defined. Minimum distance between

ASP and AEP = 25% of final measuring range value. Output signal

ranges from 4 to 20 mA in set measuring range. Output is also indicated

by: flow rate above measuring range (output signal > 20 mA), or flow rate

below measuring range (output signal between 3.6 and 4 mA).

Fault Indication

OL: Detection range exceeded (flow rate > 120% of final value of mea-

suring range)

SC 1: Flashing - short circuit in switching output 1*

SC 2: Flashing - short circuit in switching output 2*

SC: Flashing - short circuit in both switching output*

Err: Flashing - fault in measuring probe

*Concerned output is switched off as long as short circuit continues.

Faults are indicated even if display is deactivated.

Figure 7

Figure 5

Figure 6

Chart 3

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