Dwyer Instruments UF35 Скачать руководство пользователя страница 9

Figure 13: Marking the Separation Distance

Using a marker pen or a strip of ticket paper, mark around the
pipe from the front edge of the first sensor “A” till you reach the
halfway point of the pipe.  From “B”, measure the separation dis-
tance calculated by the electronics.  Mount the second transduc-
er as per the first with the stem facing the other transducer.
Press ENTER to view the flow.  The signal strength should be
greater than 50%.  Should there be difficulty getting a signal,
remove the sensor from the gull-wing, reapply the grease and try
to find a signal by moving it by hand.

Figure 14: Positioning of the Sensor Cables

Position the RED sensor cable upstream and the BLUE sensor
cable downstream.  The electronics will display a positive flow
reading with cables in this orientation.  If the unit displays a nega-
tive reading, the cables have been connected to the wrong sen-
sors.

MAINTENANCE

Following installation, the UF35 requires no routine maintenance.
Aside from methods described in this manual, units are not field
serviceable and should be returned to the factory if repair is nec-
essary.

UF35 Flow Range

0

13

25

50

75

100

150

200

0.02 0.03 0.04 0.07 0.09 0.10

0.13

1.8

2.5

3.5

4.5

7.3

9.4 mps

0.07 0.10 0.13 0.22 0.29 0.32

0.42

5.9

8.2

11.40

14.76

23.94

FLOW RANGE- REFLEX MODE

FLOW RANGE- DIAGONAL MODE

30.90 fps

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]

©Copyright 2003 Dwyer Instruments, Inc.

UF35 bulletin  6/13/03  10:50 AM  Page 9

Содержание UF35

Страница 1: ... in either Reflex or Diagonal Mode Ensure the Guide rail itself is free of grease Figure 1 Inverted view of grease applied to sen sor block Model UF35 Specifications and Operating Instructions Bulletin F UF35 SPECIFICATIONS Range 1 6 to 26 ft sec 0 5 to 8 m s Pipe Range 2 to 15 75 50 to 400 mm nominal bore Accuracy 2 of reading Repeatability 0 5 or 0 1 LPM whichever is greater Display 7 digit flow...

Страница 2: ... for m s press 4 again for f s Press 7 for l s press 7 again for l m Press 8 for g min press 8 again for USG min Press 9 for m3 min press 9 again for m3 sec There are some facilities that require the cursor to be moved from left to right This can be done using keys 5 left and 6 right The pulse output can only be activated in the flow mode Transducers The UF35 is supplied with one matched pair of t...

Страница 3: ...ment to READ FLOW Main Menu View Edit Site Data The VIEW EDIT SITE DATA mode can be accessed from the main menu It allows the user to enter application details for up to 20 different sites This facility is useful if a number of sites are being monitored on a regular basis Application data can be pro grammed into each site before getting to the site When scrolling up down the menu press ENTER to se...

Страница 4: ...s use enhanced mode when signals are below 800 Below 800 the system may gener ate noise and therefore the accuracy of the measurement cannot be guaranteed Sensor Parameters This facility is passwords protected It stores sensor information used by Dwyer and is not available for the user Factory Settings The facility is used by Dwyer in the process of instrument calibra tion Pressing ENTER takes the...

Страница 5: ... µs below the Up µs Dn µs value Phase up dn µs Only valid if Calculated µs and Up µs Dn µs are correct If the reading is zero then there is no signal which could mean the pipe is empty or the liquid is contaminated with particles or air Phase offset This value will be between 0 and 15 The exact value is not important and will vary between applications It should however be stable when the flow cond...

Страница 6: ...nsor set CANNOT READ FLOW BECAUSE Sensor mode is invalid for this pipe size Temperature range is 20 C to 125 C The temperature range of the transducers is 20 to 125 C Enter a lining thickness first This message appears when in VIEW EDIT SITE DATA the user has tried to enter a pipe lining material before entering a thick ness APPLICATION INFORMATION The UF35 is a Transit Time ultrasonic flow meter ...

Страница 7: ...ut when the transducers are sighted this close to any obstruction errors can be considerable It is not possible to predict the amount of error as this depends entirely upon the type of obstruction and the configuration of the pipe work and flow profile The message therefore is clear Do not expect to obtain accurate results if the transducers are positioned closer than allowed to any obstruction th...

Страница 8: ...he UF35 has been calibrated to operate on turbulent flows with a Reynolds Number of approximately 100 000 The calibration of the unit will not be valid if the Reynolds No is below 4000 If the UF35 is to be used on laminar flow applications it will be necessary to calculate the Reynolds No for each application To calculate the Reynolds No it is necessary to know the Kinematic viscosity in Centistok...

Страница 9: ...UE sensor cable downstream The electronics will display a positive flow reading with cables in this orientation If the unit displays a nega tive reading the cables have been connected to the wrong sen sors MAINTENANCE Following installation the UF35 requires no routine maintenance Aside from methods described in this manual units are not field serviceable and should be returned to the factory if r...

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