Series 644 - Industrial Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin P-644
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Fax: 219/872-9057
e-mail:
[email protected]SPECIFICATIONS
Service: Compatible gases and liquids.
Wetted Materials: 17- 4 PH SS.
Accuracy: ±0.05% FS RSS.
Total Error Band (Includes all thermal effects): <±0.25% FS over entire
temperature compensated range.
Stability: < 0.15% FS/year.
Operating Temperature Limits: -40 to 185°F (-40 to 85°C).
Pressure Limits: Proof pressure and burst pressure: See pressure limits table
below.
Compensated Temperature Range: -4 to 140°F (-20 to 60°C).
Power Requirements:
9 to 30 VDC for current output;
15 to 30 VDC for voltage output.
Minimum Supply Voltage:
Min. supply voltage (VDC) for current output = 9 + 0.02 x loop resistance Ω
(loop resistance Ω = line resistance + receiver resistance).
Output Signal:
0 to 10 VDC (4-wire);
4 to 20 mA (2-wire).
Response Time: < 10 ms (voltage output), < 80 ms (current output).
Max Current Consumption:
4 to 20 mA: 22 mA;
0 to 10 VDC: 20 mA.
Electrical Connections: 3 ft cable or 6-pin male bayonet connector.
Process Connection: 1/4˝ male NPT or 7/16˝-20 male SAE with O-ring.
Enclosure Rating: NEMA 4X (IP65).
Mounting Orientation: Vertical.
Weight: 9 oz (254 g).
Agency Approvals: CE.
Ø1-5/16
[Ø33.02]
4-3/4
[120.42]
3-5/16
[83.44]
1 [25.63]
3 FT CABLE
CONNECTION (-L)
BAYONET CONNECTOR
6-PIN (-B)
1/4-NPT (-P)
7/16˝-20 SAE MALE (-S)
The Series 644 Industrial Pressure Transmitter is a robust transmitter designed
for high accuracy pressure applications. Boasting an accuracy of ±0.05% FS RSS
(<±0.25% TEB), the 644 is intended for precise measurements in the critical
applications of calibration technology, hydraulic/pneumatic controls, and many
more laboratory and industrial settings. The Series 644 offers multiple
measurement options with two output choices (VDC or mA) and ten psig pressure
ranges (optional 0 to 15 psia). The robust and compact all stainless steel Series
644 is available with either a 1/4˝ male NPT, or 7/16˝-20 male SAE process
connections. Each transmitter is provided with an 11 point NIST traceable
calibration certificate.
INSTALLATION
1. Environment
The operating temperature limits of the 644 are -40 to 185°F (-40 to 85°C). The
compensated temperature range is -4 to 140°F (-20 to 60°C).
2. Pressure Fittings
Available pressure fittings are given in table below:
3. Installation of Pressure Fittings
Your transmitter is designed for most accurate operation when subjected to
pressures within the designated pressure range. Refer to the catalog bulletin
specifications for proof pressure limits.
For the most sensitive pressure ranges, excessive high torquing of a metal
pressure fitting may cause slight zero shift which may be trimmed out using the
zero adjustment. Use of a plastic fitting often shows no noticeable zero shift. The
torquing effect does not appreciably affect linearity or sensitivity. The wrench flat
on the Series 644 must be used when installing the positive pressure fitting.
Range
Number
00
01
02
03
04
05
06
07
08
09
10
11
Range
0 to -14.7 psig
0 to 15 psig
0 to 25 psig
0 to 50 psig
0 to 100 psig
0 to 150 psig
0 to 200 psig
0 to 300 psig
0 to 500 psig
0 to 750 psig
0 to 1000 psig
0 to 15 psia
Proof Pressure
30 psig
30 psig
50 psig
100 psig
200 psig
300 psig
400 psig
600 psig
800 psig
1200 psig
1500 psig
30 psia
Burst Pressure
3000 psig
3000 psig
3000 psig
8000 psig
10000 psig
10000 psig
10000 psig
10000 psig
10000 psig
10000 psig
10000 psig
3000 psia
Pressure
Port Code
-P
-S
Fitting
Description
1/4˝-18 male NPT
7/16˝- 20 male SAE
P-644:SSS-1000 11/4/10 2:21 PM Page 1
(4 Seiten)
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