Dwyer Bulletin E-111-A Series 626 and 628 Pressure Transmitters Instruction Manual
- June 3, 2024
- Dwyer
Table of Contents
Bulletin E-111-A
Series 626 & 628 Pressure Transmitters
Specifications – Installation and Operating Instructions
-GH General Purpose Housing
Bulletin E-111-A Series 626 and 628 Pressure Transmitters
The Series 626 & 628 Pressure Transmitters converts a single positive pressure
into a standard 4-20 mA output signal. The Series 626 and 628 can be used to
accurately measure compatible gases and liquids; Series 626 full-scale
accuracy is 0.25%; Series 628 full-scale accuracy is 1.0% (see
specifications). Designed for industrial environments with a NEMA 4X (IP66)
housing, this transmitter resists most effects of shock and vibration.
CAUTION Do not exceed specified supply voltage ratings. Permanent damage
not covered by warranty will result. This device is not designed for 120 or
240 VAC operation. Use only on 13-30 VDC.
PRESSURE LIMITS
| Range | *Maximum Pressure | Over Pressure |
|---|---|---|
| 0 to 5 psi | 10 psi | 50 psi |
| 0 to 15 psi | 30 psi | 150 psi |
| 0 to 30 psi | 60 psi | 300 psi |
| 0 to 50 psi | 100 psi | 300 psi |
| 0 to 100 psi | 200 psi | 500 psi |
| 0 to 150 psi | 300 psi | 750 psi |
| 0 to 200 psi | 400 psi | 1000 psi |
| 0 to 300 psi | 600 psi | 1500 psi |
| 0 to 500 psi | 1000 psi | 2500 psi |
| 0 to 600 psi | 1200 psi | 3000 psi |
| 0 to 1000 psi | 2000 psi | 5000 psi |
| 0 to 1500 psi | 3000 psi | 5000 psi |
| 0 to 3000 psi | 6000 psi | 7500 psi |
*Pressures exceeding the maximum pressure limit may cause a calibration shift of up to ±3% of full scale.
INSTALLATION
-
Location: Select a location where the temperature of the transmitter will be between 0 and 175°F (-18 to 79°C). Distance from the receiver is limited only by total loop resistance. The tubing or piping supplying pressure to the unit can be practically any length required but long lengths will increase response time slightly.
-
Position: The transmitter is not position sensitive. However all standard models are originally calibrated with the unit in a position with the pressure connection
downward. Although they can be used at other angles, for best accuracy it is recommended that units be installed in the position calibrated at the factory.
Position affects will be more noticeable on ranges below 30 psi. -
Pressure Connection: Use a small amount of plumber’s tape or other suitable sealants to prevent leaks. Be sure the pressure passage inside the port is not blocked.
-
Electrical Connections Wire Length – The maximum length of wire connecting the transmitter and receiver is a function of wire size and receiver resistance. Wiring should not contribute more than 10% of the receiver resistance to total loop resistance. For extremely long runs (over 1000 feet), choose receivers with higher resistance to minimize the size and cost of connecting leads. Where wiring length is under 100 feet, wire as small as 22 AWG can be used.
SPECIFICATIONS
Service: Compatible gases and liquids.
Wetted Materials: Type 316L SS.
Accuracy: 626: 0.25% FS, 0.20% RSS;
628: 1.0% FS, 0.5% RSS; 626 absolute
ranges: 0.5% FS, 0.35% RSS (includes
linearity, hysteresis, and repeatability).
Temperature Limit: 0 to 200°F (-18 to 93°C).
Compensation Temperature Range: 0 to 175° (-18 to 79°C).
Thermal Effect: 626: ±0.02% FS/°F.
628: ±0.04% FS/°F (includes zero and span).
Pressure Limits: See table.
Power Requirements: 10-30 VDC (for 4-20 mA, 0-5, 1-5, 1-6 VDC outputs);
13-30 VDC (for 0-10, 2-10 VDC outputs);
5 VDC ±0.5 VDC (for 0.5-4.5 VDC ratiometric output).
OutputSignal: 4-20 mA, 0-5 VDC,1-5 VDC, 0-10 VDC, or 0.5-4.5
VDC.| Loop Resistance: 0-1000 Ω max. R max = 50 (Vps-10) Ω (4-20 mA
output),
5 KΩ min (0-5, 1-5, 0.5-4.5 VDC output),
15 KΩ min (1-6, 0-10, 2-10 VDC output).
Current Consumption: 38 mA maximum (for 4-20 mA output); 10 mA
maximum (for 0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output); 140 mA maxumum
(for all 626/628/629-CH with optional LED).
Electrical Connections: Model dependent options: Wire end, Hirschman
DIN EN 175801-803-C, Packard, Deutsch, M12.
Process Connection: Model dependent options: 1/8˝, 1/4˝, 1/2˝ male NPT; 1/4˝
female NPT; 1/4˝ male or female BSPT;
1/8˝ or 1/4˝ male BSPP ISO 1179; 1/4˝ female SAE valve depressor.
Enclosure Rating: NEMA 4X (IP66).
Mounting Orientation: Mount in any position.
Weight: 10 oz (283 g).
Compliance: Standard: CE; Optional: NSF/ANSI 61/372, ANSI/UL 218, ANSI/
UL 508, NEPA 20.
---|---
CURRENT (4-20 mA) OUTPUT OPERATION
An external power supply delivering 10-30 VDC with minimum current capability
of 40 mA DC (per transmitter) is required to power the control loop. See
Figure A for connection of the power supply, transmitter and receiver. The
range of appropriate receiver load resistance (RL) for the DC power supply
voltage available is expressed
by the formula:
If ordering optional pre-wired cable, black wire is negative [-] and red wire
is positive [+].
Hirschman DIN Connector with 4-20 mA When using cable version of -GH General
Purpose Housing, black wire is negative [-] and red wire is positive [+]. When
using
optional Hirschman DIN Plug, remove top-center screw and lift off the terminal
block assembly. Wire to terminals shown below in Figure B. For optional 4-pin
M-12 connector, wire to pins as shown in Figure C.
VOLTAGE (0-5, 1-5, 0-10, 1-6 or 2-10 VDC) OUTPUT OPERATION
(Other outputs contact the factory) See Figure E for connection of the power
supply, transmitter and receiver.
Hirschman DIN Connector with Voltage Output When using cable version of -GH General Purpose Housing, black wire is negative [-], red wire is positive [+] and white wire is output. When using optional Hirschman DIN Plug, remove top-center screw and lift off the terminal block assembly. Wire to terminals shown below in Figure F. For optional 4-pin M-12 connector, wire to pins as shown in Figure G. If utilizing optional A-164 cable for M-12 connection, brown wire corresponds to pin #1, white #2,blue #3, and black #4.
RATIOMETRIC (0.5-4.5 VDC) OUTPUT OPERATION
(Other outputs contact the factory) See Figure K for connection of the power
supply, transmitter and receiver.
General Purpose Housing with Ratiometric Output When using cable version of -GH General Purpose Housing, black wire is negative [-], red wire is positive [+] andwhite wire is output. When using optional Hirschman DIN Plug, remove top-center screw and lift off the terminal block assembly. Wire to terminals shown below in Figure H. For optional 4-pin M-12 connector, wire to pins as shown in Figure I. If utilizing optional A-164 cable for M-12 connection, brown wire corresponds to pin #1, white #2,blue #3, and black #4.
Deutsche Connector with Voltage Output, Ratiometric and 4-20 mA
When using this cable version see Figure J for voltage output and ratiometric
terminal connections. See Figure P for 4-20 mA terminal connections.
MAINTENANCE
After final installation of the pressure transmitter and its companion
receiver, no routine maintenance is required. A periodic check of system
calibration is suggested. The Series 626 and 628 transmitters are not field
repairable and should be returned if repair is needed (field repair should not
be attempted and may void warranty). Be sure to include a brief description of
the problem plus any relevant application notes. Contact customer service to
receive a return goods authorization number before shipping.
CE APPROVAL
Note: Accuracy is increased to ±3.6% when a 10 V/m between 80-1000 mhz RF
field is applied.
Note: Please do not touch, cover or puncture vent filter.
©Copyright 2022 Dwyer Instruments, Inc. Printed in U.S.A. 8/22 FR# 174757-05
Rev. 2
DWYER INSTRUMENTS, INC.
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