DH3 Series Digihelic® Micro Differential Pressure Controller
product manual:
Digital Micro Differential Pressure Controller Same Size as Photohelic® with Square Output for Flow Measurement
The DH3 series Digihelic® differential pressure
controller is a three-in-one combination
meter. It combines digital display
meter, control switch and
transmitter into one. This combination not only saves storage space, but also saves installation costs and time. Digihelic® micro differential pressure
controllers are best suited for applications that measure differential pressure, wind speed, or volume. The accuracy is 1% when the range is as low as 0.25 to 2.5 inches of water column, and the accuracy is 0.5% when the range is greater than or equal to 5 inches of water column.
Digihelic® differential pressure
controller can select various universal pressure, wind speed and air volume engineering units. It has 2 single-pole double-throw switches, which can adjust the differential pressure, and also output a 4-20mA output signal corresponding to the range.
It is very easy to program and configure using the keys on the panel: safety settings, work mode selection (pressure, wind speed or air volume), engineering unit selection, K-factor selection, round tube square tube selection, alarm set point setting, manual automatic reset selection, alarm Delay, peak-to-valley recording, digital damping, 4-20mA corresponding range, etc.
• Duct air volume
• Filter status
• Static pressure in ducts or buildings
• damper control
• Fan control
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" wc ranges. Ranges 0.5 "to 5" wc and corresponding bi-directional (except ± 2.5 "wc) ± 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 wc: 25 psi; ± 2.5 ", 5 in wc: 5 psi; 10 in wc: 5 psi; 25 in wc: 5 psi; 50 in wc: 5 psi; 100 in wc: 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" 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).
Agency Approvals: CE.
SWITCH SPECIFICATIONS
Switch Type: 2 SPDT relays.
Electrical Rating: 1 A @ 30 VAC / VDC.
Set Point Adjustment: Adjustable via keypad on face.
Professional manufacturing and professional services, KUNAG creates more value for you
Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
Sale service
Trustworthy contracts, guarantee timely delivery, and keep in touch with customers at any time.
For special or complex products, our factory arranges technicians to train and guide users on product use, troubleshooting, tuning and maintenance.
After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
During the use of our products, our factory regularly organizes technical and inspection personnel to visit and solicit user feedback on product quality, use conditions, and improvement opinions in order to further improve product quality.
Quickly respond to customer complaints about product quality problems, and after-sales service personnel rushed to the scene within 24-36 hours (48 hours outside the province).
For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.
Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)
QQ: 2030185432
Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.
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