Dwyer Instruments DH3 Series Installation And Operating Instructions Manual

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Page 1

Series DH3 Digihelic® Differential Pressure Controller

Specications - Installation and Operating Instructions

Bulletin B-30

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: 219/879-8000 Fax: 219/872-9057

dwyer-inst.com e-mail: info@dwyermail.com

Page 2

DIMENSIONS

SPECIFICATIONS

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory. Housing Material: Die cast aluminum case and bezel. Accuracy: ±1.5% for 0.25 in and ±0.25 in w.c. ranges. Ranges 0.5 in to 5 in w.c. and corresponding bidirectional

(except ±2.5 in w.c.): ±1%; All other ranges: ±0.5% @ 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).

Stability: < ±1% per year. Pressure Limits: Ranges ≤ 2.5 in w.c.: 25 psi; ±2.5˝, 5 in w.c.: 5 psi; 10 in w.c.: 5 psi; 25 in w.c.: 5 psi; 50 in w.c.:

5 psi; 100 in w.c.: 9 psi.

Temperature Limits: 32 to 140°F (0 to 60°C). Compensated Temperature Limits: 32 to 140°F (0 to 60°C). Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). For 0.25˝ and ±0.25 in w.c. ranges: ±0.03%/°F

(±0.054%/°C).

Power Requirements: 12-24 VAC/VDC. Power Consumption: 3 VA max. Output Signal: 4 to 20 mA DC into 900 ohms max. Zero & Span Adjustments: Accessible via menus. Response Time: 250 ms (dampening set to 1). Display: Backlit 4 digit LCD 0.4˝ height LED indicators for set point and alarm status.

Electrical Connections: 15 pin male high density D-Sub connection. 18˝ (46 cm) cable with 10 conductors

included.

Process Connections: 1/8˝ female NPT. Side or back connections.

Mounting Orientation: Mount unit in vertical plane.

Size: 5˝ (127 mm) O.D. x 3-1/8˝ (79.38 mm); For -SS Bezel: 4-3/4˝ (120.7 mm) O.D. x 2-21/32˝ (67.5mm). Weight: 1.75 lbs. (794 g).

Agency Approvals: CE.

SWITCH SPECIFICATIONS Switch Type: 2 SPDT relays.

Electrical Rating: 1 amp @ 30 VAC/VDC.

Set Point Adjustment: Adjustable via keypad on face.

(4) 6-32 HOLES

EQUALLY SPACED ON A

5-1/8 (130.18) B.C.

PANEL MOUNTING

1/8 FEMALE NPT LOW

PRESSURE CONNECTION

1/8 FEMALE NPT HIGH

PRESSURE CONNECTION

2-1/16

[52.39]

[50.80]

1-1/4

[31.75]

ø4-47/64

[120.25]

Ø5

[127.00]

Ø4 [101.60]

FACE

5-1/2 [139.70] O.D.

MOUNTING RING

5/8 [15.88]

PANEL MAX

2-1/2

[63.50]

3/16

[4.76]

1/8 FEMALE NPT HIGH PRESSURE CONNECTION

1/2

[12.70]

1-9/32

[32.54]

11/16

[17.46]

30°

1-3/4

[44.45]

1/2

[12.70]

11/16

[17.46]

1/8 FEMALE NPT LOW

PRESSURE CONNECTION

(3) Ø3/16 [4.77] HOLES EQUALL

SPACED ON A 4-1/8 [104.78] B.C.

SURFACE MOUNTING

Page 3

INSTALLATION LOCATION: Select a clean, dry location free from shock and vibration where temperature limits will not be

exceeded. Distance from the transmitter to the receiver is limited only by total loop resistance. See ELECTRICAL CONNECTIONS. Tubing feeding pressure to the instrument can be practically any length required, but long lengths

will increase response time slightly.

POSITION: All standard models are calibrated for use in a vertical mounting position. Higher range models will perform properly at other angles but should be spanned and zeroed in the position in which they will be used. Because of their sensitivity to gravitational forces, models with ranges under 1 in w.c. (25.4 mm w.c.) must always be mounted vertically.

PRESSURE CONNECTIONS: For installation convenience two sets of 1/8˝ female NPT pressure ports are supplied.

Be sure to seal the unused ports with pipe plugs included.

Positive Pressure - Connect tubing to HIGH PRESSURE port and vent LOW PRESSURE port to atmosphere.

Negative (Vacuum) Pressure - Connect tubing to LOW PRESSURE port and vent HIGH PRESSURE port to atmosphere. (When operating this device in a dusty environment, install an optional A-331 Filter Vent Plug in the

vented port to keep interior clean.)

Differential Pressure - Connect tubing from the higher source to HIGH PRESSURE port and from the lower source to LOW PRESSURE port.

Figure A

1-1/2

[38.1]

5/16

[7.94]

11/16

[17.46]

3/4

[19.05]

1-3/32

[27.78]

1-3/4

[44.45]

1/2 [12.70]

(3) Ø3/16 [4.77] HOLES

EQUALLY SPACED ON A 4-1/8 [104.78] B.C.

Ø1/2 [12.70] HOLE FOR

LOW PRESSURE CONNECTION

Ø1/2 [12.70] HOLE FOR HIGH PRESSURE CONNECTION

Page 4

MOUNTING: The DH3 may be either panel (ush) mounted or surface mounted.

Panel Mounting - Cut a 4-3/4˝ or 121 mm diameter hole in the panel and insert the unit from the front. Slip on the

mounting ring with the stepped side facing rear. Next, t the snap ring into the narrow groove at back edge of bezel. Thread four (6) 32 x 1-1/4˝ mounting screws into tapped holes in mounting ring and set it against snap ring. Tighten

screws against rear of panel. See Figure B.

Surface Mounting - Drill (3) 3/16˝ (4.76 mm) diameter holes for mounting and cut a 9/16˝ x 1-1/2˝ (14.3 x 38.1 mm) opening for access to terminal block as indicated in Figure B. If rear pressure connections are to be used, also provide 1/2˝ diameter holes as shown in Figure A and Figure C. Insert 6-32 machine screws from rear of mounting surface,

thread into tapped holes on back of transmitter and tighten.

Ø4-3/4 [120.65] HOLE

PNEUMATIC PRESSURE T

APS

SNAP RING

GROOVE

Figure B

Figure C

Page 5

For -SS Bezel Installation

Provide a 4-9/16˝ opening in panel. Insert gage and secure with supplied mounting hardware.

WIRING

The DH3 uses a standard 15 pin male high density D-Sub connector available from most electronic distributors. A pre-wired 18˝ cable is included with each unit. See below table for cable color wiring information.

NOTES:

1. If 12-24 VDC power is used, the polairty is unimportant.

2. Wire in accordance with an equivalent national standard or code. Use copper conductors only rated for 60°C.

3. All terminals are rated CLASS 2.

4. ISOLATION: All inputs and outputs to each other: 500 VAC.

5. 4-20 mA Transmitter – Check the specications for the device receiving this signal for input resistance. Typical 250 to 600 OHMS, 600 OHMS maximum.

Function

15 PIN

Connector

Terminal

Cable Color

12-24 VAC/VDC Power 12-24 VAC/VDC Power 4-20mA XMTR Output 4-20mA XMTR Output + SP1 Relay N/O SP1 Relay Com SP1 RELAY N/C SP2 or ALarm Relay N/O SP2 or ALarm Relay Com SP2 or ALarm Relay N/C

1 6 2 11 12 13 14 15 10 5

Brown

Yellow

Black Red Vilolet

Grey White

Blue

Green Orange

Page 6

INWC

1.000

SP1

SP2

ALHI

ALLO

SP/AL

RST

X1K

FRONT PANEL

ALARM DESCRIPTOR

UNITS

INPUT VALUE

MULTIPLIER

DESCRIPTOR

VISABLE WITH

SOME VELOCITY

AND FLOW

RANGES

SP2 DESCRIPTOR

SP1 DESCRIPTOR

KEY FUNCTIONS Keys Home Position Function Main Menu Function Sub Menu Function

SP/AL

Sequences the display through SET POINT and

ALARM settings

Return to home position

Allows access to the menus

Return to home position

Return to previous menu

ARROW

Sequences through

menus

Increments a value

DOWN

ARROW

Sequences through

menus

Decrements a value

ENTER

Displays full scale range of unit

Enter into SUB MENU

Changes a value or

setting. Press ENTER and display

will blink. Adjust with

UP or DOWN arrows. Press ENTER to

store. Display will stop blinking.

RESET

Clears or resets an Alarm (alarm set for manual reset)

Peak/Valley SUB MENU resets display

to present value.

SP/AL

RST

Page 7

SETTING SET POINTS AND ALARMS

The hot key provides direct access to the Set Point and Alarm MENU. The Set Point and Alarm MENUS that are displayed are based upon the Control (CtrL) SUB MENU.

SET POINT ADJUSTMENT

Adjusting the DH3 Set Points is quick and simple. Instead of setting a set point and deadband, simply adjust

SP1H

SP2H

for the desired relay turn on point, and then adjust

SP1L

SP2L

for the desired relay turn off point.

In the above graph, an instrument with a 1.0˝ range would have the SP1 relay turn on at 0.8˝ and off at 0.4˝.

SP1H

sets

the relay turn on point, and

SP1L

sets the relay turn off point. The relays outputs normally function in the direct acting mode, which means the relays turn on with an increase in pressure. SP1 may be congured to act as a reverse acting relay (refer to the 1SP SUB MENU setting, page 15). When set for reverse acting,

SP1H

sets the relay turn OFF point,

and

SP1L

sets the relay turn ON point. SP2 is always direct acting.

SP/AL

SP/AL SP/AL

SP/AL

SP/AL SP/AL

SP/AL

SP/AL SP/AL

SP/AL

Visible when

mode =

CONTROL MODE

PRES

SURE

TIME

0.2

0.4

0.6

0.8

1.0

(in. w.c.)

Page 8

CONTINUED

SETTINGS

MAIN MENUS SUB MENUS

MENUS

UNAVAILABLE

FOR

BI-DIRECTIONAL

RANGES AND

RANGES ABOVE

25 IN. W.C.

Menu Map

Page 9

CONTINUED

SETTINGS

MAIN MENUS SUB MENUS

Page 10

MAIN MENUS SUB MENUS

SETTINGS

Menus present only

in pressure operation

Page 11

Main Menu Selections (Upper Right Display Reads

)

SECr

Security - Lock out access to Set Point and Alarm settings, or lock out access to all settings.

OPEr

Operation - Selection of Pressure, Velocity or Flow and corresponding engineering units.

OUt

Output - Select a Single Set Point, 2 Set Points, or a Set Point and an Alarm mode of operation.

d.S

Display - Monitor and adjust display related settings: Peak, Valley, display resolution, % output and

dampening.

AdU

Advanced functions - Modify advanced function parameters, transmitter output scaling, Maintenance Set

Point settings and calibration.

Page 12

MAIN MENUS and SUB MENUS

SECr

(Security) MAIN MENU

SECr

is the only SUB MENU in the security MENU. When the security SUB MENU is selected, the present security

level is displayed in the upper right hand display. To change the security level, adjust the number displayed to the

number shown in the following table for the desired security level.

The password values shown in the table cannot be altered, so retain a copy of these pages for future reference.

OPEr

(Operation) MAIN MENU

The

OPEr

MENU selects the measurement type of the instrument.

The SUB MENUS are:

PrES

- Pressure

KFAC

- K Factor

XDIM

- X Dimension

UEL

- Velocity

ArEA

- Area

YDIM

- Y Dimension

FLO

- Flow

DIA

- Diameter

If the instrument is set for Velocity, the

OPEr

MENU will have an additional

KFAC

SUB MENU. If the instrument is

set for Flow, the

OPEr

MENU will have additional

KFAC

and

ArEA

SUB MENUS. These will be discussed under

Velocity and Flow. When scrolling through the

OPEr

SUB MENUS, the measurement type the unit is currently set

for will show the units in the upper right display. The other measurement types will have a blank upper right display.

Security Level Displayed Access

Password Value to Enter

1 All menus access 10 2 Menu Access

SP/AL Locked

3 SP/AL Access

Menus Locked

4 All settings locked 111

Units visible, so unit is presently set to measure pressure

Units not visible Units not visible

Page 13

NWC

- Inches of water column

FTWC

- Feet of water column

MMWC

- Millimeters of water column

CMWC

- Centimeters of water column

PSI

- Pounds per square inch

INHG

- Inches of mercury

MMHG

- Millimeters of mercury

MBAR

- Millibar

- Pascal

KPA

- Kilopascals

HPA

- Hectopascals

OZIN

- Ounce inches

Note:

OVFL

(over ow) or

UnFL

(under ow) will appear when the ranges have been exceeded above or below full

scale by 2%.

Note: Air velocity and ow readings are based upon standard dry air conditions with an ambient temperature of 70°F and a barometric pressure of 29.92 INHG.

PrES

(Pressure) SUB MENU

For pressure measurement, the following units are available:

UEL

(Velocity) SUB MENU

For velocity measurement, the following units are available:

SFPM

- Standard feet per minute

M/S

- Meters per second

Table 1 - Pressure Range vs. Available Units INWC FTWC MMWC CMWC PSI INHG MMHG MBAR PA KPA HPA OZIN

.1000 .2500 .5000

1.000

2.500

5.000

10.00

25.00

50.00

100.0

.2083 .4167 .8333

2.083

4.167

8.333

2.540

6.350

12.70

25.40

63.50

127.0

254.0

635.0 1270 2540

.2540 .6350

1.270

2.540

6.350

12.70

25.40

63.50

127.0

254.0

.1806 .3613 .9032

1.806

3.613

.1839 .3678 .7356

1.839

3.678

7.356

.1868 .4671 .9342

1.868

4.671

9.342

18.68

46.71

93.42

186.8

.2491 .6227

1.245

2.491

6.227

12.45

24.91

62.27

124.5

249.1

24.91

62.27

124.5

249.1

622.7 1245 2491 6227

.1245 .2491 .6227

1.245

2.491

6.227

12.45

24.91

.2491 .6227

1.245

2.491

6.227

12.45

24.91

62.27

124.5

249.1

.1445 .2890 .5780

1.445

2.890

5.780

14.45

28.90

57.80

Table 2 - Available Velocity Ranges INPUT RANGE IN WC

SFPM RANGE

M/S RANGE

0 - 0.1 0 - 0.25 0 - 0.5 0 - 1 0 - 2.5 0 - 5 0 - 10 0 - 25

0 - 1266 0 - 2002 0 - 2832 0 - 4004 0 - 6332 0 - 8954

0 - 12.66 x IK 0 - 20.02 x IK

0 - 6.431 0 - 10.17 0 - 14.39 0 - 20.35 0 - 32.17 0 - 45.48 0 - 64.33 0 - 101.7

Page 14

FLO

(Flow) SUB MENU

For ow measurements the following units are available:

SCFM

- Standard cubic feet per minute

M3H

- Cubic meters per hour

FLOr

(Flow Range) SUB MENU

- 99.99 x 1K ow range

- 999.9 x 1K ow range

Tables 3-6 show the ow ranges available, and the maximum duct size that can be set for each input range.

KFAC

SUB MENU

KFAC

K Factor - becomes accessible if the instrument is set for Velocity or Flow. When the DH3 is used with a Pitot

tube, the manufacturer may specify a K Factor. The adjustment range is 0.01 to 2.00. The factory setting is 1.

FLOr

= LO Maximum Duct Size (English)

FLOr = LO

Maximum Duct Size (Metric)

FLOr

= HI Maximum Duct Size (English)

FLOr = HI

Maximum Duct Size (Metric)

Table 3 RANGE IN WC

SFPM RANGE

MAX. DUCT SIZE, SQ. FT.

0.1

0.25

0.5 1

2.5 5 10 25

99.99 x 1K

78.9

49.9

35.3

24.9

15.7

11.1

7.8

4.9

Table 5 RANGE IN WC

/Hr

RANGE

MAX. DUCT SIZE M

0.1

0.25

0.5 1

2.5 5 10 25

99.99 x 1K

4.32

2.73

1.93

1.37

0.86

0.61

0.43

0.27

Table 6 RANGE IN WC

/Hr

RANGE

MAX. DUCT SIZE M

0.1

0.25

0.5 1

2.5 5 10 25

99.99 x 1K

43.19

27.31

19.3

13.64

8.63

6.10

4.31

2.73

Table 4 RANGE IN WC

SFPM RANGE

MAX. DUCT SIZE, SQ. FT.

0.1

0.25

0.5 1

2.5 5 10 25

999.9 x 1K

789.8

499.5

353.1

249.7

157.9

111.7

78.9

49.9

Page 15

ArEA, DIA, XDIM

and

YDIM

SUB MENUS

These SUB MENUS become accessible if the instrument is set for ow. When measuring ow, the area of the duct must be specied. Tables 3 and 4 show the input range vs maximum ow and duct size. For a rectangular duct the maximum size is specied in square feet or meters. For a circular duct the maximum size is specied as the diameter. X, Y and circular dimensions are entered in feet with 0.01 foot resolution for

FLOr

= LO and 0.1 foot resolution for

FLOr

= HI, or entered in millimeters with 1 millimeter resolution.

ArEA

- Area, select

CIR

for a circular duct or

RECT

for a rectangular duct. If a circular duct is selected, the

DIA

SUB MENU will be activated. If a rectangular duct is selected, the

XDIM

and

YDIM

SUB MENUS will be activated.

DIA

- Diameter, enter the diameter of a duct

XDIM

- Enter the “X” dimension of a duct

YDIM

- Enter the “Y” dimension of a duct

OUt

(Output) MAIN MENU

The

OUt

MENU selects the output type of the instrument. The SUB MENUS are:

CtrL

- Control type

ALrE

- Alarm reset, manual or auto

ISP

- SP1 reverse or direct acting

AL.H

- Alarm inhibit

- Alarm type

ALDL

- Alarm delay

Page 16

CtrL

(Control) SUB MENU

1SP

- Single set point

2SP

- Two fully independent set points

SPAL

- Single set point and alarm

1SP

(SP1 Reverse or Direct Acting) SUB MENU

DIR

- Direct. Relay turns on with increasing pressure

REV

- Reverse. Relay turns on with decreasing pressure

100

Process

Direct Acting

Time

SPH

SPL

Relay Inactive

Relay Active

100

Process

Reverse Acting

Time

SPH

SPL

Relay Inactive

Relay Active

Page 17

The following alarm function SUB MENUS are activated when

CtrL

is set to

SPAL

(Alarm Type) SUB MENU

- High alarm

- Low alarm

HILO

- For a high/low guardband type alarm

ALARM ADJUSTMENT

Alarm settings are dependent upon the selected alarm mode. The DH3 differential pressure controller alarm may be congured as a High Alarm, Low Alarm, or High/Low Alarm. Alarm settings are all absolute and may be set to anywhere within the range of the instrument. The dead bands of the alarms are xed at 1% of full scale.

MIN. PRESSURE

MAX. PRESSURE

ALHI

Relay OFF Relay ON

HIGH ALARM FUNCTION

MIN. PRESSURE

MAX. PRESSURE

ALLO

Relay ON Relay OFF

LOW ALARM FUNCTION

MIN. PRESSURE

MAX. PRESSURE

ALLO

Relay ON Relay OFF Relay ON

HIGH/LOW ALARM

FUNCTION

ALHI

Page 18

AL0S

(Alarm Output State) SUB MENU

CL0S

- Alarm relay contacts close upon alarm condition

0PEN

- Alarm relay contacts open upon alarm condition

ALrE

(Alarm Reset) SUB MENU

ONOF

- Automatic reset

HOLD

- Manual reset. An alarm is reset by the RESET key on the front panel, or an external reset switch.

AL.H

(Low Alarm Inhibit) SUB MENU

- Alarm inhibit is on

OFF

- Alarm inhibit is off

AL.H

is selected ON, a low alarm condition is suspended upon power up until the process value passes through

the alarm set point once.

ALDL

(Alarm Delay) SUB MENU

Sets the amount of time an alarm condition must be continuously met before the alarm condition is recognized. The

alarm delay is adjustable from 0-3600 seconds.

d.S

(Display) MAIN MENU

PEAK

- Peak value

rESO

- Resolution

VALy

- Valley value

Pd.S

- Process display

ZERO

- Zero

DAMP

- Dampening level

PEAK

(Peak) SUB MENU

The Peak feature stores the highest pressure reading the instrument has measured since the last reset or power up.

At power up

PEAK

is reset to the present pressure reading. To manually reset the

PEAK

value, press the

RESET key while in the

PEAK

SUB MENU.

VALy

(Valley) SUB MENU

The valley feature stores the lowest pressure reading the instrument has measured since the last reset or power up.

At power up

VALy

is reset to the present pressure reading. To manually reset the

VALy

value, press the RESET

key while in the

VALy

SUB MENU.

Page 19

rESO

(Resolution) SUB MENU

The DH3 is capable of displaying four digits of resolution. However, at very low pressures the instability of the pressure may cause uctuations in the least signicant digit causing the least signicant digit to be of little value. Three digit resolution (

3DIG

) can only be active when there is at least one digit to the right of a decimal.

3DIG

- Set display for 3 digit resolution

4DIG

- Set display for 4 digit resolution

Pd.S

(Process Display) SUB MENU

STD

- Display reads pressure, velocity, or ow values

PCT

- Display reads % of full scale value

When the display is reading percent,

PCT

is displayed in the upper right of the display. The percent display is only

available in pressure operation.

DAMP

(Dampening) SUB MENU

Adjust from 1-16

Dampening stabilizes the display from instabilities due to things such as vibration and excessive pressure

uctuations. The dampening setting adjusts the amount of readings that are averaged for each display update.

Adjust the dampening value until the display reads a stable value for the application.

AdU

(Advanced) MAIN MENU

POL

- Process output low

ZERO

- Zero calibration

POH

- Process output high

SPAN

- Span calibration

MSP1

- Maintenance set point 1

MSP2

- Maintenance set point 2

POL

and

POH

(Process Output Low and High) SUB MENUS

This feature is used in pressure operation only.

Process output low and high are used to scale the 4-20 mA output. Set

POL

to the desired display reading for 4mA

output, and set

POH

to the desired display reading for 20 mA output.

POH

must be higher than

POL. POL

may be

adjusted 2% BELOW minimum scale up to

POH. POH

may be adjusted from

POL

to 2% ABOVE maximum scale.

Page 20

MSP1

and

MSP2

(Maintenance Set Point 1 & 2) SUB MENUS

Adjust for the desired maintenance set points when the unit is placed in the maintenance mode. The deadband is xed at 2% of full scale. To enter or leave the maintenance mode, press and hold the for 8 seconds.

ZERO

and

SPAN

(Calibration of Zero and Span) SUB MENUS

The lower display reads

CAL

in this mode.

ZERO

Calibration

Note: For accurate calibration, do not apply any pressure when performing this function.

With the display reading

ZERO

, press the ENTER key. The upper display will blink. Press ENTER again to complete

the zeroing of the instrument or press the

key to cancel.

SPAN

Calibration

With the display set to

SPAN

, apply full scale pressure to the unit. Press the ENTER key. The upper display will

blink. Press ENTER again to complete the calibration or press the

key to cancel.

SP/AL

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: 219/879-8000 Fax: 219/872-9057

dwyer-inst.com e-mail: info@dwyermail.com