Dwyer Instruments Series DH3 Digihelic Assembly instructions

Bulletin B-30
Series DH3 Digihelic®Differential Pressure Controller
Specifications - Installation and Operating Instructions
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A. Fax: [phone] e-mail: [email protected]
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2
SPECIFICATIONS
Service: Air and non-combustible, compat-
ible gases.
Wetted Materials: Consult factory.
Housing Material: Die cast aluminum
case and bezel.
Accuracy: ±1.5% for 0.25˝ and ±0.25˝ w.c.
ranges. Ranges 0.5˝ to 5˝ w.c. and corre-
sponding bi-directional (except ±2.5˝ w.c.):
±1%; All other ranges: ±0.5% @ 77°F
(25°C) including hysteresis and repeatabili-
ty (after 1 hour warm-up).
Stability: < ±1% per year.
Pressure imits: Ranges
≤ 2.5˝ w.c.: 25 psi; ±2.5˝, 5˝ w.c.: 5 psi;
10˝: w.c. 5 psi; 25˝ w.c.: 5 psi; 50˝ w.c.: 5
psi; 100˝ w.c.: 9 psi.
Temperature imits: 32 to 140°F (0 to
60°C).
Compensated Temperature imits: 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˝
w.c. ranges: ±0.03%/°F (±0.054%/°C).
Power Requirements: 12-24 VAC/VDC.
Power Consumption: 3 VA max.
Output Signal: 4-20 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 sta-
tus.
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 verti-
cal plane.
Size: 5˝ (127 mm) O.D. x 3-1/8˝ (79.38
mm).
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 key-
pad on face.
DIMENSIONS
(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)
2
(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 EQUALLY
SPACED ON A 4-1/8 (104.78) B.C.
SURFACE MOUNTING
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INSTA ATION
OCATION: 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 ELECTR CAL CONNECT ONS. 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 gravitation-
al forces, models with ranges under 1˝ w.c. (25.4 mm w.c.) must always be mounted ver-
tically.
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 H GH PRESSURE port and vent LOW PRESSURE
port to atmosphere.
Negative (Vacuum) Pressure - Connect tubing to LOW PRESSURE port and vent H GH
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 H GH PRESSURE port
and from the lower source to LOW PRESSURE port.
3
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
Fig. A
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MOUNTING: The DH 3 may be either panel (flush) mounted or surface mounted.
Panel Mounting - Cut a 4-13/16˝ or 122 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, fit 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 Fig. 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 Fig. B. f rear
pressure connections are to be used, also provide 1/2˝ diameter holes as shown in Figs.
A and C. nsert 6-32 machine screws from rear of mounting surface, thread into tapped
holes on back of transmitter and tighten.
Fig. B
Fig. C
Ø4-3/4 [120.65] HOLE
PNEUMATIC
PRESSURE TAPS
SNAP RING
GROOVE
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WIRING
The DH 3 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. f 12-24 VDC power is used, the polairty is unimportant.
2. Wire in accordance with an equivalent national standard or code. Use copper conduc-
tors only rated for 60°C.
3. All terminals are rated CLASS 2.
4. SOLAT ON: All inputs and outputs to each other: 500 VAC.
5. 4-20 mA Transmitter – Check the specifications for the device receiving this signal for
input resistance. Typical 250 to 600 OHMS, 600 OHMS maximum.
5
Function
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
15 PIN Connector
Terminal
1
6
2
11
12
13
14
15
10
5
Cable Color
Brown
Yellow
Black
Red
Vilolet
Grey
White
Blue
Green
Orange
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SP/ALSP/AL
MENUMENU
EE
RSTRST
Home
Position Function
Sequences the display
through SET PO NT and
ALARM settings
Allows access to the menus
Displays full scale
range of unit
Clears or resets an Alarm
(alarm set for manual reset)
Main Menu Function
Return to home
position
Return to home
position
Sequences through
menus
Sequences through
menus
Enter into SUB MENU
Sub Menu Function
Return to home position
Return to previous menu
ncrements a value
Decrements a value
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.
Peak/Valley SUB
MENU resets display to
present value.
SP/AL
MENU
UP
ARROW
DOWN
ARROW
ENTER
RESET
KEY FUNCTIONS
INWCINWC
1.0001.000
SP1SP1 SP2SP2 ALHIALHI
ALLOALLO
SP/ALSP/AL RSTRST
MENUMENU EE
X1KX1K
FRONT PANEL
ALARM
DESCRIPTOR
UNITS
INPUT VALUE
MULTIPLIER
DESCRIPTOR
VISABLE WITH
SOME VELOCITY
AND FLOW
RANGES
SP2 DESCRIPTOR
SP1 DESCRIPTOR
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SETTING SET POINTS AND A ARMS
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.
SP/ALSP/AL SP/ALSP/AL SP/ALSP/AL
SP/ALSP/AL SP/ALSP/AL SP/ALSP/AL
SP/ALSP/AL SP/ALSP/AL
SP/ALSP/AL SP/ALSP/AL SP/ALSP/AL
SP/ALSP/AL SP/ALSP/AL
Visible whenVisible when
Visible whenVisible when
Visible whenVisible when
mode =mode =
mode =mode =
mode =mode =
CONTROL MODECONTROL MODE CONTROL MODECONTROL MODE
CONTROL MODECONTROL MODE
SET POINT ADJUSTMENT
Adjusting the DH®3 Set Points is quick and simple. nstead of setting a set point and dead-
band, simply adjust
SP1H or SP2H for the desired relay turn on point, and then adjust SP1L
or SP2L for the desired relay turn off point.
PRESSURE PRESSURE
00
00TIMETIME
0.20.2
0.40.4
0.60.6
0.80.8
1.0
(in. w.c.)
n 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 configured 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/ALSP/AL
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MENU MAPMENU MAP
CONTINUED
CONTINUED
SETTINGSSETTINGS
MAIN MENUS SUB MENUS
MENUS
UNAVAILABLE
FOR
BI-DIRECTIONAL
RANGES AND
RANGES ABOVE
25 IN. W.C.
EE
MENUMENU
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CONTINUEDCONTINUED
SETTINGSSETTINGS
MAIN MENUS SUB MENUS
0PEn
EE
MENUMENU
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MAIN MENUS SUB MENUS SETTINGS
Menus present only
in pressure operation
EE
MENUMENU
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Main Menu Selections (Upper Right Display Reads MENU )
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 reso-
lution, % output and dampening.
AdU Advanced functions - Modify advanced function parameters, transmitter output
scaling, Maintenance Set Point settings and calibration.
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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
f the instrument is set for Velocity, the
OPEr MENU will have an additional KFAC SUB
MENU. f 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 evel
Displayed
1
2
3
4
Access
All menus access
Menu Access
SP/AL Locked
SP/AL Access
Menus Locked
All settings locked
Password Value
to Enter
10
70
90
111
Units visible, so unit
is presently set to
measure pressure
is presently set to
measure pressure
Units not visibleUnits not visible Units not visibleUnits not visible
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PrES (Pressure) SUB MENU
For pressure measurement, the following units are available:
Table 1 Pressure Range vs. Available Units
INWC
.1000
.2500
.5000
1.000
2.500
5.000
10.00
25.00
50.00
100.0
FTWC
.2083
.4167
.8333
2.083
4.167
8.333
MMWC
2.540
6.350
12.70
25.40
63.50
127.0
254.0
635.0
1270
2540
CMWC
.2540
.6350
1.270
2.540
6.350
12.70
25.40
63.50
127.0
254.0
PSI
.1806
.3613
.9032
1.806
3.613
INHG
.1839
.3678
.7356
1.839
3.678
7.356
MMHG
.1868
.4671
.9342
1.868
4.671
9.342
18.68
46.71
93.42
186.8
MBAR
.2491
.6227
1.245
2.491
6.227
12.45
24.91
62.27
124.5
249.1
PA
24.91
62.27
124.5
249.1
622.7
1245
2491
6227
KPA
.1245
.2491
.6227
1.245
2.491
6.227
12.45
24.91
HPA
.2491
.6227
1.245
2.491
6.227
12.45
24.91
62.27
124.5
249.1
OZIN
.1445
.2890
.5780
1.445
2.890
5.780
14.45
28.90
57.80
UEL (Velocity) SUB MENU
For velocity measurement, the following units are available:
SFPM - Standard feet per minute
M/S - Meters per second
Table 2 Available Velocity Ranges
NOTE: Air velocity and flow readings are based upon standard dry air conditions with an
ambient temperature of 70°F and a barometric pressure of 29.92 NHG.
INPUT RANGE
INWC
0 - 0.1
0 - 0.25
0 - 0.5
0 - 1
0 - 2.5
0 - 5
0 - 10
0 - 25
SFPM
RANGE
0 - 1266
0 - 2002
0 - 2832
0 - 4004
0 - 6332
0 - 8954
0 - 12.66 x K
0 - 20.02 x K
M/S RANGE
0 - 6.431
0 - 10.17
0 - 14.39
0 - 20.35
0 - 32.17
0 - 45.48
0 - 64.33
0 - 101.7
INWC - nches of water column
FTWC - Feet of water column
MMWC - Millimeters of water column
CMWC - Centimeters of water column
PSI - Pounds per square inch
INHG - nches of mercury
MMHG - Millimeters of mercury
MBAR - Millibar
PA - Pascal
KPA - Kilopascals
HPA - Hectopascals
O IN - Ounce inches
NOTE: OVFL (over flow) or UnFL (under flow) will appear when the ranges have been
exceeded above or below full scale by 2%.
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FLO (Flow) SUB MENU
For flow measurements the following units are available:
SCFM - Standard cubic feet per minute
M^3H - Cubic meters per hour
FLO r (Flow Range) SUB MENU
LO - 99.99 x 1K flow range
HI - 999.9 x 1K flow range
Tables 3-6 show the flow ranges available, and the maximum duct size that can be set
for each input range.
Table 3
FLOr = LO Maximum Duct Size (English)
RANGE
IN WC
0.1
0.25
0.5
1
2.5
5
10
25
SCFM
RANGE
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
MAX. DUCT
SIZE, SQ.
FT.
78.9
49.9
35.3
24.9
15.7
11.1
7.8
4.9
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.
Table 4
FLOr = HI Maximum Duct Size (English)
RANGE
IN WC
0.1
0.25
0.5
1
2.5
5
10
25
SCFM
RANGE
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
MAX. DUCT
SIZE, SQ.
FT.
789.8
499.5
353.1
249.7
157.9
111.7
78.9
49.9
Table 5
FLOr = LO Maximum Duct Size (Metric)
RANGE
IN WC
0.1
0.25
0.5
1
2.5
5
10
25
Mˆ3/Hr
RANGE
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
99.99 x 1K
MAX. DUCT
SIZE Mˆ2
4.32
2.73
1.93
1.37
0.86
0.61
0.43
0.27
Table 6
FLOr = HI Maximum Duct Size (Metric)
RANGE
IN WC
0.1
0.25
0.5
1
2.5
5
10
25
M3/Hr
Range
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
999.9 x 1K
MAX. DUCT
SIZE, M2
43.19
27.31
19.3
13.64
8.63
6.10
4.31
2.73
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ArEA , DIA , XDIM and YDIM SUB MENUS
These SUB MENUS become accessible if the instrument is set for flow. When measuring
flow, the area of the duct must be specified. Tables 3 and 4 show the input range vs max-
imum flow and duct size. For a rectangular duct the maximum size is specified in square
feet or meters. For a circular duct the maximum size is specified 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. f a
circular duct is selected, the
DIA SUB MENU will be activated. f 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
AL - Alarm type ALDL - Alarm delay
Y
X
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0
100
Process
Reverse Acting
Time
SPH
SPL
Relay Inactive
Relay Active
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
0
100
Process
Direct Acting
Time
SPH
SPL
Relay Inactive
Relay Active
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The following alarm function SUB MENUS are activated when CtrL is set to SPAL :
AL (Alarm Type) SUB MENU
HI - High alarm
LO - Low alarm
HILO - For a high/low guardband type alarm
A ARM ADJUSTMENT
Alarm settings are dependent upon the selected alarm mode. The DH3® differential pres-
sure controller alarm may be configured 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 instru-
ment. The dead bands of the alarms are fixed 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
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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 ( ow Alarm Inhibit) SUB MENU
ON - Alarm inhibit is on
OFF - Alarm inhibit is off
f
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
ERO - 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.
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rESO (Resolution) SUB MENU
The DH 3 is capable of displaying four digits of resolution. However, at very low
pressures the instability of the pressure may cause fluctuations in the least
significant digit causing the least significant 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 flow 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 fluctuations. 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 ERO - Zero calibration
POH - Process output high SPAN - Span calibration
MSP1 - Maintenance set point 1
MSP2 - Maintenance set point 2
POL and POH (Process Output ow 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.
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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 fixed at 2% of full scale. To enter or
leave the maintenance mode, press and hold the for 8 seconds.
ERO and SPAN (Calibration of Zero and Span) SUB MENUS
The lower display reads
CAL in this mode.
ERO Calibration
NOTE: For accurate calibration, DO NOT apply any pressure when
performing this function.
With the display reading
ERO , press the ENTER key. The upper display will
blink. Press ENTER again to complete the zeroing of the instrument or press
the
MENU 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
MENU key to cancel.
SP/ALSP/AL
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