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Dwyer Instruments DH3 Series - Switch Specifications

Dwyer Instruments DH3 Series
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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]
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 EQUALL
Y
SPACED ON A 4-1/8 [104.78] B.C.
SURFACE MOUNTING