Dwyer DH3 User Manual
Page 2
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 Limits: 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 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: 12-24 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)
ш4-47/64
(120.25)
Ш5
(127.00)
Ш4 (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