Specifications

The Dwyer 7116B Spirahelic
®
Pressure Indicating Transmitter
simultaneously provides local indication on a large, easily read ana-
log scale while also converting that pressure into a standard two
wire, 4-20 mA signal for ranges from 0-60 to 0-600 psi. Positive
compatible gas pressure is measured to the accuracy of ±0.5% of
full scale. The gage employs a unique triple helix Bourdon tube for
precision measurement of compatible gases and liquids. The direct
drive design reduces friction and mass, resulting in exceptionally
good responsiveness, repeatability and accuracy. Because there are
no gears, springs linkages or other complicated mechanisms, wear
is practically eliminated. The electrical signal and conditioning is pro-
duced by a piezoresistive pressure cell. A 316 stainless steel con-
nection block features convenient dual
1
/
4
˝ female NPT and
1
/
2
˝ male
NPT pressure connection. Pressure block also includes integral filter
plug to keep dirt out. Safety is assured with solid front case design
and rear blowout hole.
INSTALLATION
1. Select a location free from excessive vibration where the tem-
perature limits of 20 to 120°F (-6.7 to 49°C) will not be exceed-
ed. Mounting surface should be vertical to match the position in
which all standard gages are calibrated. Avoid locations in
direct sunlight which may cause accelerated discoloration of
the clear acrylic lens or where exposure to oil mist or other air-
borne vapors could likewise result in lens damage. Make sure
that the case relief area on the rear is not obstructed. This hole
is designed to direct pressure rear-ward in the event of a failure
of the Bourdon tube element. See complete safety recommen-
dations at the end of this bulletin.
2. See Fig. A for mounting hole instructions.
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Compatible gases & liquids.
Wetted Materials: Inconel
®
X-750 Bourdon Tube, Type 316L SS
connection.
Housing: Black polycarbonate case and clear acrylic cover.
Accuracy: Grade 2A (0.5% F.S.).
Stability: ± 1% F.S./year.
Pressure Limit: 150% of full scale. Gage will maintain its specifi-
cations for overpressures up to 150% maximum range. Normal
operation should be between 25% and 75% of full scale.
Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).
Size: 4-1/2˝ (114.3 mm) dial face. Design conforms to ASME
B40.1.
Process Connections: Dual size 1/4˝ male NPT / 1/4˝ female
NPT, bottom connection.
Weight: 29.5 oz (836.3 g).
TRANSMITTER SPECIFICATIONS
Accuracy: 0.5% F.S.
Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).
Thermal Effect: ± 0.025% F.S./°F (0.045% F.S./°C).
Power Requirements: 10-35 VDC (2 wire).
Output Signal: 4-20 mA DC.
Zero & Span Adjustments: Externally accessible potentiometers.
Loop Resistance: DC, 0-1250 ohms.
Current Consumption: DC, 38 mA max.
Electrical Connections: Screw Terminals.
Mounting Orientation: Vertical.
Agency Approvals: CE.
Series 7116B Spirahelic
®
Pressure Indicating Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-105
(3) ø[5.57] MOUNTING
HOLES EQUALLY SPACED ON A
3-3/8 [85.73] BOLT CIRCLE
DUAL PRESSURE
CONNECTION
1/2 MALE NPT
1/4 FEMALE NPT
120°
ø5-7/8
[149.23]
3-7/64
[78.98]
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
Fig. A
ZERO ADJUST
TERMINAL BLOCK
SPAN ADJUS
T
E-105 9/11/03 8:13 AM Page 1