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7

Signet 2537 Flowmeter

 

t

T

P

t

T

P

T

P

t

2s

2s

x2

x5

1.

2.

3.

4.

5.

Set Averaging

Minimum value

Maximum value

T

P

t

P

T

t

T

P

t

T

P

t

This function is available on 
these versions of the 2537:

2s

Go to next
menu item

Return to
Normal Operation

Save the new setting:

Example:
Set the Averaging for 50 seconds.

Set Sensitivity

Minimum value

Maximum value

2s

2s

x3

x5

T

P

t

T

P

t

T

P

t

1.

2.

3.

4.

This function is available on 
these versions of the 2537:

T

P

t

P

T

t

T

P

t

T

P

t

2s

Go to next
menu item

Return to
Normal Operation

Save the new setting:

Example:  Set the Sensitivity to 5.

10 s

2 s

20 s

30 s

40 s

50 s

60 s

70 s

No AVERAGING, no SENSITIVITY

With AVERAGING set to 0 (zero) and with SENSITIVITY set to zero, 
the 2537 responds to every unstable shift in the 

fl

 ow.  The dashed 

red line represents the actual output of the 

fl

 ow sensor in unstable 

fl

 ow conditions.

With AVERAGING set to 50 seconds and SENSITIVITY still set to 
zero the 

fl

 ow rate is stabilized, but a sharp change in 

fl

 ow rate is not 

represented for 50 seconds or longer. (dotted green line).

With AVERAGING at 50 seconds and SENSITIVITY set to 4 OR 5, 
the 

fl

 ow rate is stabilized, while the sudden shift in 

fl

 ow is re

fl

 ected 

very quickly. (Solid blue line)

NOTE:  The SENSITIVITY function is ineffective if the AVERAGING function is set to zero (seconds).

AVERAGING only

AVERAGING and SENSITIVITY

Averaging and Sensitivity Settings

• Because 

ideal 

fl

 ow conditions are often impossible to achieve, the 

fl

 ow rate is often erratic, which causes any control features (ie; 

relays, 4-20 mA loops, etc.) that are associated with the 

fl

 ow rate to be erratic.

• 

The best solution to these problems is to correct any piping de

fi

 ciency that causes the instability.  This may involve longer straight 

runs upstream, reducing the pipe size to maintain a full pipe at all times, and other installation changes.  But in many situations 
these measures are simply not possible.

• 

The 2537 meter provides two tools that are designed to "work around" these de

fi

 ciencies.  The Averaging and the Sensitivity 

features should be studied before making adjustments.

Averaging Time in Seconds (Factory set: 0 seconds)

• 

Set the time the meter will use as the averaging period.  The range is from 0 (no average applied to input) to 100 (seconds of 
averaging applied to input).

 

Use higher averaging times to smooth the display and current output where the 

fl

 ow in the pipe is erratic.

Quick Response Sensitivity (Factory set:  0)

• 

Set the relative degree of change in the 

fl

 ow rate required to allow the 2537 to disable the AVERAGING and jump to a new 

fl

 ow 

rate immediately.  The scale is from 0 (Least sensitive, averaging is never disabled.) to 9 (a very small change in 

fl

 ow rate will 

disable the averaging).

The factory setting is 0 (zero).

The factory setting is 0 (zero).

Содержание 159 001 291

Страница 1: ...ental Requirements Enclosure rating NEMA 4X IP65 Storage Temperature 10 C to 75 C Ambient Temperature 0 C to 65 C Relative Humidity 0 to 90 RH non condensing Altitude 2000 m 6562 ft Pollution Degree 2 Output specifications Signal Averaging Programmable 0 to 100 seconds Sensitivity Response Programmable 0 to 9 scale Pulse divider Total pulse output Pulse Divider Setting 1 0000 to 99999 Maximum puls...

Страница 2: ...allation fittings that control the position of the paddlewheel in relation to the dimensions of the pipe Type Description 2 to 4 inch cut 1 7 16 inch hole in pipe Over 4 inch cut 2 1 8 inch hole in pipe 0 5 to 4 inch versions PVC or CPVC 2 to 4 inch cut 1 7 16 inch hole in pipe 6 to 8 inch cut 2 1 8 inch hole in pipe Iron Carbon Steel 316 SS Threaded tees Carbon steel stainless steel Weld on Weldo...

Страница 3: ...For conduit installations Thread conduit with in NPT threads directly into the conduit port For conduit with ISO threads use the black thread adapter included with the connector kit To comply with NEC requirements do not use any metal conduit in the installation 2537 Paddlewheel Flowmeter for in to 4 in pipe 130 mm 5 12 in 97 mm 3 82 in 2537 Paddlewheel Flowmeter for 5 to 8 in pipe 171 mm 6 73 in ...

Страница 4: ...elay may be a dry contact type or a solid state type The dry contact relay requires an external power source of 24 VDC 10 The solid state relay requires an external power source of 5 to 24 VDC S1 S2 Power Supply 24 VDC 0 03 A Normally Closed Common Normally Open Blk Red Shld Internal sensor connections S1 S2 Power Supply 5 24 VDC 0 03 A No Connection Blk Red Shld 1 2 Load S1 S2 Blk Red Shld t T P ...

Страница 5: ...IZED 0000 0 to 6400 0 page 9 4 Set Set flow RATE to be represented by 4 mA 0 0000 to 99999 page 6 20 Set Set flow RATE to be represented by 20 mA 0 0000 to 99999 page 6 Contrast Adjust visibility of liquid crystal display 1 to 3 page 6 Operation The 2537 Flowmeter is available in 4 different models The programming menus vary significantly from one model to another This chart is provided inside the...

Страница 6: ...rn to Normal Operation Save the new setting Select the volumetric units for the flow measurement Flow Units Example Set the Flow Units to Gallons per minute This function is available on these versions of the 2537 2s 2s T P t T P t T P t T P t 1 2 3 Liters minute Factory setting Liters hour Liters day Liters second Gallons minute Gallons hour Gallons day Gallons second 2s Go to next menu item Retu...

Страница 7: ...nction is set to zero seconds AVERAGING only AVERAGING and SENSITIVITY Averaging and Sensitivity Settings Because ideal flow conditions are often impossible to achieve the flow rate is often erratic which causes any control features ie relays 4 20 mA loops etc that are associated with the flow rate to be erratic The best solution to these problems is to correct any piping deficiency that causes th...

Страница 8: ...heel sensor is divided by the K Factor MULTIPLIED by the P factor The resulting frequency is output through a relay 2s Go to next menu item Return to Normal Operation Save the new setting Select DIVIDER or TOTAL operation The factory setting is TOTAL PULSE DIVIDER Output Input pulses P Factor DIVIDER allows you to set a scaling value P Factor from 1 0000 to 99999 Example If the P Factor is set for...

Страница 9: ...ate reaches the setpoint the 2537 will wait this long in seconds before triggering the alarm The factory setting is 0000 0 seconds 4 Program the DELAY A HI alarm will be activated when the flow rate rises ABOVE the setpoint A LO alarm will be activated when the flow rate falls BELOW the setpoint The factory setting is Hi gh x4 2s 2s T P t T P t t T P 1 2 3 4 1 Select HI or LO Relay Alarm logic 2s ...

Страница 10: ...N COPPER PIPE SCH K 1 2 CUKT005 917 84 242 50 3 4 CUKT007 428 27 113 15 1 CUKT010 256 43 67 749 1 1 4 CUKT012 176 44 46 615 1 1 2 CUKT015 115 69 30 565 2 CUKT020 63 385 16 746 COPPER TEE FITTINGS ON COPPER PIPE SCH L 1 2 CUKT005 858 22 226 74 3 4 CUKT007 385 74 101 91 1 CUKT010 241 64 63 841 1 1 4 CUKT012 170 90 45 152 1 1 2 CUKT015 112 03 29 598 2 CUKT020 61 74 16 310 PIPE SIZE IN FITTING 2536 85...

Страница 11: ... 1 7052 DN 200 SFMT080 4 0720 1 0758 PVC FITTINGS DIN ISO EUROPE ONLY DN 15 PVMT005 972 37 256 90 DN 20 PVMT007 485 69 128 32 DN 25 PVMT010 297 27 78 540 DN 32 PVMT012 170 25 44 980 DN 40 PVMT015 103 71 27 400 DN 50 PVMT020 59 500 15 720 DN 65 PVMT025 34 973 9 2400 DN 80 PVMT030 24 981 6 6000 DN 100 PVMT040 16 275 4 3000 DN 150 PVMT060 8 1756 2 1600 DN 200 PVMT080 4 0878 1 0800 Maintenance and Cle...

Страница 12: ...ulse Divider via Dry Contact Relay Integral Mount 3 2537 2C T0 159 001 316 Pulse Divider via Solid State Relay Integral Mount 3 2537 3C T0 159 001 317 Flow Switch via Dry Contact Relay Integral Mount 3 2537 4C T0 159 001 318 Flow Switch via Solid State Relay Integral Mount 3 2537 5C T0 159 001 319 Digital S3L Integral Mount 3 2537 6C T0 159 001 320 4 20 mA Integral Mount Accessories Mfr Part No Co...

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