Dwyer Instruments SERIES DHII Catalog Page

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SERIES DHII

DIGIHELIC® II DIFFERENTIAL PRESSURE CONTROLLER

NEMA 4 (IP66) Housing With Large, Bright LCD, Square Root Output for Flow

PRESSURE

Differential Pressure

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The Series DHII Digihelic® II Differential Pressure Controller takes all the features of the standard Digihelic 4 (IP66) housing. The Digihelic process output and Modbus display that can easily be seen from long distances. The electrical wiring has also been enhanced in the DHII with its detachable terminal blocks. The removable terminals allow the install to easily wire the terminal block outside the housing and then attach

to the circuit board, reducing wiring difculties and installation time on the process.

The Digihelic this product to be the perfect choice when mounting pressure controls outdoors in such applications as rooftop air handlers. This housing also makes it the ideal solution for surface mounting in clean rooms or facilities where water or a cleaning solution is utilized in maintaining plant cleanliness.

FEATURES/BENEFITS

• NEMA 4 housing enables a range of uses both outdoors or indoors where water is present

• Large backlight LCD display provides local reading from a distance

• Detachable terminal blocks reduce wiring difculties saving installation time

APPLICATIONS

• Air handlers

• Clean rooms

Gages/Switches, Transmitters

ACCESSORIES Model Description MN-1 A-301 A-302

A-438 A-489 A-302F-A

Digihelic Links

MODEL CHART - AVAILABLE PRESSURE ENGINEERING UNITS

Model DHII-002 DHII-004 DHII-006 DHII-007 DHII-008 DHII-009* DHII-010*

*Velocity and volumetric ow not available on bi-directional range units and models DHII-009 & DHII-010.

OPTIONS Use order code: Description

-NIST NIST calibration certicate

II Pressure Controller combines the 2 SPDT control relays, 4 to 20 mA

II Differential Pressure Control in the NEMA 4 (IP66) enclosure enables

in w.c.

.2500

1.000

5.000

10.00

25.00

50.00

100.0

Pressure Controller and packages them in a robust NEMA

communications with a large, brightly backlit 4 digit LCD

Mini-Node™ USB/RS-485 converter

Static pressure tip for 1/4˝ metal tubing connection Static pressure tip for 3/16˝ and 1/8˝ I.D. plastic or rubber

tubing Surface mounting brackets

4˝ straight static pressure tip with ange 303 SS static pressure tip with mounting ange; for 3/16˝ ID rubber or plastic tubing; 4˝ insertion depth; includes mounting

screws

™

Communications software

w.c.

.4167 .8333

2.083

4.167

8.333

w.c.

w.c. psi in Hg

6.350

0.635

25.40

2.540

127.0

12.70

254.0

25.40

635.0

63.50

1270

127.0

2540

254.0

.1806 .3613

.9032

1.806

3.613

mm Hg mbar Pa kPa hPa oz/in

0.467

1.868

.3678

9.342

.7356

18.68

1.839

46.71

3.678

93.42

7.356

186.8

[37.62]

0.623

2.491

12.45

24.91

62.27

124.5

249.1

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62.28

249.1

1245

2491

6227

[33]

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0.249

1.245

2.491

6.227

12.45

24.91

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SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing Material: Aluminum, glass. Accuracy: ±0.5% at 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. = 2 psi; 5˝: 5 psi; 10˝: 5 psi; 25˝: 5 psi; 50˝:

5 psi, 100˝: 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). Power Requirements: High voltage power = 100 to 240 VAC, 50 to 400 Hz or 132

to 240 VDC; Low voltage power = 24 VDC ±20%. Power Consumption: Low voltage power = 24 VDC - 130 mA max; High voltage power = 100 to 240 VAC, 132 to 240 VDC - 7 VA max.

Output Signal: 4 to 20 mA DC into 900 Ω max. Zero & Span Adjustments: Accessible via menus. Response Time: 250 ms (dampening set to 1). Display: 4 digit backlit LCD 0.6˝ height. LED indicators for set point and alarm

status. Electrical Connections: Euro type removable terminal blocks with watertight

conduit ttings for 1/2˝ watertight conduit.

Process Connections: 1/8˝ female NPT. Enclosure Rating: Designed to meet NEMA 4 (IP66). Mounting Orientation: Mount unit in horizontal plane. Weight: 2 lb 10 oz (1.19 kg). Serial Communications: Modbus Agency Approvals: CE, UL.

SWITCH SPECIFICATIONS Switch Type: 2 SPDT relays. Electrical Rating: 8 amps at 240 VAC resistive. Set Point Adjustment: Adjustable via keypad on face.

0.623

0.144

2.491

0.578

12.45

2.890

24.91

5.780

62.27

14.45

124.5

28.90

249.1

57.80

DWYER INSTRUMENTS, INC. | 34

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MODEL CHART - BI-DIRECTIONAL* RANGES Model Range DHII-012 DHII-014 DHII-015 DHII-016 DHII-017

*Velocity and volumetric ow not available on bi-directional range units and models DHII-009 & DHII-010.

Process Tubing Options: See page 455 (Gage Tubing Accessories)

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4X Ø3/16 [4.76] CLEARANCE HOLES FOR MOUNTING

MOUNTING HOLE

PATTERN

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RTU, RS485, 9600 baud.

0.25 to 0 to 0.25 in w.c.

1.0 to 0 to 1.0 in w.c.

2.5 to 0 to 2.5 in w.c. 5 to 0 to 5 in w.c. 10 to 0 to 10 in w.c.

is a registered trademark of Schneider Automation, Inc.

Modbus

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