Instruction Manual

The Series 636D is an all stainless steel differential pressure transmit-
ter that was designed to endure harsh environmental and media condi-
tions. This transmitter is CSA approved explosion-proof for use in the
specified, hazardous locations and also meets NACE standards for off-
shore applications. The Series 636D is also weatherproof and has a
NEMA 4 enclosure rating. With all 316L stainless steel wetted materials
this unit is compatible with most media.
The design of the Series 636D transmitter allows for quick and inexpen-
sive installation. Its light weight and slim profile eliminate complicated
mounting hardware and allows for installation where space is limited.
The piezoresistive sensing element utilizes a Wheatstone bridge to cor-
relate a change in resistance to change in the process pressure. This
series is offered with either a 4-20 mA output or a 1-5 VDC output.
Series 636D Fixed Range Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-30-D
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]
SPECIFICATIONS
Service: Compatible gases, liquids, or vapors.
Wetted Materials: Types 316L SS.
Accuracy: BFSL: ±0.5% F.S. (includes linearity, hysteresis, & repeata-
bility).
Stability: ±1.0% F.S./yr.
Pressure Limits: 3 x full scale differential pressure; Burst: 2500 psig.
Temperature Limits:
Ambient Operating: -40 to 140°F (-40 to 60°C);
Process Interface: -40 to 212°F (-40 to 100°C);
Storage: -40 to 212°F (-40 to 100°C).
Compensated Temperature Range: -20 to 160°F (-29 to 71°C).
Thermal Effect: ±2% F.S./50°F (reference to 77°F).
Power Requirements: 12-30 VDC for 4-20 mA outputs; 8-14 VDC for
1-5 VDC outputs, both with reverse polarity protection.
Output Signal: 4-20 mA DC or 1-5 VDC.
Zero and Span Adjustment: Fixed.
Response Time: 20 ms.
Loop Resistance: 900 ohms max @ 30 VDC for current outputs. For
voltage outputs, minimum lead resistance 50k ohms.
Current Consumption: 4-20 mA for current output models; 3 mA for
voltage output models.
Electrical Connections: 2 ft, 22 AWG cable; 3/4˝ female NPT conduit.
Process Connections: Two 1/2˝ female NPT.
Enclosure Rating: NEMA 4 (IP65).
Mounting Orientation: ±0.05 psi/90° rotation from horizontal.
Weight: 1.8 lb (0.82 kg).
Agency Approvals: CSA approved explosion-proof for Class I,
Division 1, Groups B, C, and D; Class II, Groups E, F, and G; Class III.
#22 AWG SHIELDED CABLE
2
4 INCHES LONG
3/4-14 FEMALE NPT
CONDUIT THREAD
Ø1-3/4
[44.45]
1-4/33
[105.41]
1˝ HEX TYPICAL
SS TAG
1/2-14 FEMALE NPT
PROCESS CONNECTION
TYPICAL
1-1/4 HEX
1-4/33
[28.45]
4
-1/8
[
104.75]
1-8/22
[33.2]
1-3/4
[44.45]