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Series DH3 Digihelic® Differential Pressure Controller

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Series SGX & SGF Stainless Steel Low Pressure Gage

Series SGX & SGF Stainless Steel Low Pressure Gage

Series 43000 Capsu-Photohelic® Pressure Switch/Gage

Series DH3 Digihelic® Differential Pressure Controller

3 in 1 Instrument: Gage, Switch and Transmitter, Square Root Output for Flow

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No longer available, see Series DHC Digihelic® Differential Pressure Controller as the suggested replacement.

Grouped product items
Model	Description	Availability*	Qty	Price

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" and ±0.25" w.c. ranges. Ranges 0.5" to 5" w.c. and corresponding bi-directional (except ±2.5" 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 (uni- and corresponding bidirectional), ≤ 1 in w.c.: 9 psi; 2.5 and 5 in w.c.: 1.5 psi; 10 in w.c.: 3 psi; 25 in w.c.: 8 psi; 50 in w.c.: 15 psi; 100 in w.c.: 20 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" w.c. ranges: ±0.03%/°F (±0.054%/°C).
Power Requirements:: 12 to 28 VDC, 12 to 28 VAC 50 to 400 Hz.
Power Consumption:: 3 VA max.
Output Signal:: 4 to 20 mA DC into 900 Ω max.
Zero & Span Adjustments:: Accessible via menus.
Response Time:: 250 ms (damping 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) OD x 3-1/8" (79.38 mm).
Weight:: 1.75 lb (794 g).
Compliance:: CE.
: SWITCH SPECIFICATIONS
Switch Type:: 2 SPDT relays.
Electrical Rating:: 1 A @ 30 VAC/VDC.
Set Point Adjustment:: Adjustable via keypad on face.

Features

3-in-1 instrument allows the reduction of several instruments with one product, saving inventory, installation time and money
Full-scale accuracy of 1.5% or better even on extremely low ranges, and 0.5% for ranges above 5 in w.c. provide for greater measurement precision
Secure menu program provides access to device operation only for the right skill level
Optional stainless steel bezel is the same installation diameter as Magnehelic® gage and simplifies field upgrade to DH3 pressure controller

Support Library

Model Chart

EXAMPLE	DH3	002	AT	Series DH3-002-AT Digihelic® Differential Pressure Controller, range 0.25" w.c., with aluminum tag.
SERIES	DH3			Digihelic® Differential Pressure Controller
RANGE		002 003 004 005 006 007 009 010 011 013 014 015 016 017 018		0.25" w.c. 0.5" w.c. 1" w.c. 2.5" w.c. 5" w.c. 10" w.c. 25" w.c. 50" w.c. 100" w.c. 0.25-0-0.25" w.c. 0.5-0-0.5" w.c. 1-0-1" w.c. 2.5-0-2.5" w.c. 5-0-5" w.c. 10-0-10" w.c.
OPTIONS			AT COO FC NIST SS ST	Aluminum Tag Certificate of Origin Factory Calibration NIST Certificate of Calibration Brushed 304 Stainless Steel Bezel Stainless Steel Tag

Questions

Question

A customer would like to get switching capability, local pressure indication, and a 4-20 mA output signal all in one device. Do we have a product to offer them?

Answer

Yes. Series' DH, DHII or DH3 possess high/low set points, digital gage display and 4-20 mA full scale output signal for air and compatible gas. Series' EDA, DPG-200, DPT, and MDPC possess high/low set points, digital gage display and 4-20 mA full scale output signal for compatible fluids.

Related

Series DHII

Series DPT

Series EDA

Series DH

Series DH3

Series MDPC

Series DPG-200

Question

Your Magnehelic gauge doesn't come with a calibration certificate, do you have any documentation for these gauges to meet these needs?

Answer

We have 3 options: (1) We can supply a Certificate of Conformance at no charge if you request that certificate at the time of order. The Certificate of conformance would state that each Magnehelic gauge is calibrated to meet the specifications stated on the spec sheet. (2) We offer a factory calibration “-FC” as an option that is a certificate of the standard calibration points at the time of manufacture, for a small fee. (3) We can also provide a NIST-traceable calibration for an extra charge per gage if that is required. To get the NIST-traceable calibration, you would simply add a “-NIST” to the end of your part number. NIST-traceable calibrations will come with the 6 point calibration certificate. We recommend “periodic calibration” for our Magnehelic, though we leave the specific time-frame up to the end user, since different organizations have different requirements (i.e. government groups often require more frequent calibrations.) If you choose to have the NIST traceable calibration done, the NIST group (the National Institute of Standards and Technology) dictates yearly calibration and it will be printed on the certificate.

Related

Series 2-5000

Series 2000-SP

Series DHII

Series DH3

Series DH

Series 2000

Question

I am using DH3 Digihelic differential pressure controllers for my applications. The instruction says that "the Alarm can be reset by the RESET key on the front panel, or an external reset switch". For the second case (reset by external reset switch), could you let me know how to do it? The instruction doesn't provide any related detail. Thanks in advance.

Answer

Unfortunately, contrary to what was printed in the instruction manual, the DH3 does not have the ability for the alarm to be reset via an external reset switch, mainly due to the limited number of pins available in the electrical connector. This feature is only available in the DH and DHII series Digihelics.

Related

Series DH3

Series DH

Series DHII

Model	Description	Availability*	Price
A-298	Flat aluminum bracket for flush mounting (for Series A3000 Photohelic®, Series 4000 Capsuhelic®, Series 605, and Series 3000MR)	Less Than 1 Week*	$40.50
A-301	Static pressure tip, for 1/4" metal tubing connection.	1-3 days*	$14.50
A-302	Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing.	1-3 days*	$13.75
A-302F-A	303 SS Static pressure tip with mounting flange, for 3/16" I.D. rubber or plastic tubing. 4" insertion depth, includes mounting screws	1-3 days*	$13.25
A-320-B1	Weatherproof enclosure, ABS, compatible with Series 3000MR/MRS Photohelic®, Series 605 Magnehelic®, Series DH3 Digihelic® (to fit, the casing on the electrical plug must be removed), Series 2000 Magnehelic® with medium and high pressure options	1-3 days*	$347.15
A-370	Flush mount bracket used with: Photohelic® 3000MR/MRS, Capsuhelic®, 631B Transmitter. Bracket is then surface mounted. Steel with gray hammertone epoxy finish.	1-3 days*	$48.50
A-489	4" 303 SS straight static pressure tip with flange, 1/4" hose barb.	1-3 days*	$10.20
A-700	Power supply (0.5 A)	1-3 days*	$144.45