Dwyer Instruments 626 series User manual

Series 626 & 628 Pressure Transmitters
Specications - Installation and Operating Instructions
Bulletin E-111
-CH Conduit Housing -GH General Purpose Housing
The Series 626 & 628 Pressure Transmitters converts a single positive pressure
into a standard 4 to 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 specications). Designed for
industrial environments with a NEMA 4X (IP66) housing, this transmitter resists most
effects of shock and vibration.
INSTALLATION
1. 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.
2. 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.
3. 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.
4. 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 316 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 to 20 mA, 0-5, 1-5, 1-6 VDC outpus);
13-30 VDC (for 0-10, 2-10 VDC outputs);
5 VDC ±0.5 VDC (for 0.5-4.5 VDC ratio-
metric output).
Output Signal: 4 to 20 mA, 0-5 VDC,1-5
VDC, 0-10 VDC, or 0.5-4.5 VDC.
Response Time: 300 ms.
Loop Resistance: 0-1000 Ohms max.
R max = 50 (Vps-10) Ohms (4 to 20 mA
output), 5K Ohms (0-5, 1-5, 1-6, 0-10,
2-10, 0.5-4.5 VDC output).
Current Consumption: 38 mA
maximum (for 4 to 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: Conduit
Housing (-CH): terminal block, 1/2˝
female NPT conduit; General Purpose
Housing (-GH): cable DIN EN 175801-
803-C.
Process Connection: 1/4˝ male or
female NPT and BSPT.
Enclosure Rating: NEMA 4X (IP66).
Mounting Orientation: Mount in any
position.
Weight: 10 oz (283 g).
Agency Approvals: CE.
Pressure Ranges
Pressure
Range
Maximum
Pressure
Over
Pressure
0-15 psia
15-0 psia
0-30 psia
0-50 psia
0-100 psia
0-200 psia
0-300 psia
0-5 psig
0-15 psig
0-30 psig
0-50 psig
0-100 psig
0-150 psig
0-200 psig
0-300 psig
0-500 psig
0-1000 psig
0-1500 psig
0-2000 psig
0-3000 psig
0-5000 psig
0-8000 psig
30 psia
30 psia
60 psia
100 psia
200 psia
400 psia
600 psia
10 psig
30 psig
60 psig
100 psig
200 psig
300 psig
400 psig
600 psig
1000 psig
2000 psig
3000 psig
4000 psig
6000 psig
7500 psig
10000 psig
45 psia
45 psia
90 psia
150 psia
300 psia
600 psia
900 psia
50 psig
150 psig
300 psig
300 psig
500 psig
750 psig
1000 psig
1500 psig
2500 psig
5000 psig
5000 psig
5000 psig
7500 psig
10000 psig
12000 psig
Caution: Do not exceed specied supply voltage ratings. Permanent
damage not covered by warranty will result. This device is not designed
for 120 or 240 volt AC operation. Use only on 13 to 30 VDC.
LIQUID TIGHT FITTING
CORD DIAMETER RANGE
.200 to .350 (5.08 to 8.89) 1-9/32
[32.54]
2-15/16 [74.61]
OPTIONAL 1/4 NPT
FEMALE FITTING
3-1/2 [88.90]
1/4 NPT
MALE FITTING
3/4
[19.05]
1/4 NPT
5-1/2 [139.70]
1-3/32
[27.76]
7/8 [22.23]
HEX
1/4 NPT
2-27/64 [61.52]
3-13/64 [81.36]
055/64 [21.83]
®
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]

CURRENT (4 to 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:
Conduit Housing with 4 to 20 mA Output (-CH) Electrical connections to the pressure
transmitters are made to the terminal block located inside the housing. Remove the
screws and lift off the cover. Wire as shown in Figure A, B or C. Use Figure A for
current output connection. Use Figure B for current output with optional LED display.
Use Figure C for current output with optional LED display using two power supplies.
If ordering optional pre-wired cable, black wire is negative (-) and red wire is positive
(+).
Hirschman DIN Connector with 4 to 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 D. For optional 4-pin M-12
connector, wire to pins as shown in Figure E.
PRESSURE
TRANSMITTER
RECEIVER
mA
2 BLACK
POWER
SUPPLY
13-30 VDC
1 RED
3 (NC) 4 SILVER
SHIELD WIRE (NOT CASE GROUNDED)
RL Max = Vps – 10
20 mA DC
Figure A: Current output connection
Figure B: Current output with optional LED display connection Figure F: Packard Connection
Figure C: Current output with optional LED display using two power supplies
Figure D Figure E
SPAN
ZERO
PRESS AND HOLD TO
ZERO THE DISPLAY
PRESS TO
DISPLAY
THE GAGE’S
PRESSURE
RANGE
YELLOW
LED DISPLAY CONNECTOR
TERM 1 (+)
TERM 2 (-)
TERM 4 (+)
OPTIONAL LED DISPLAY
RECEIVER
mA
LED DISPLAY
POSITIVE SUPPLY
10-30 VDC
(140 ma)
POWER
SUPPLY
+
-
TRANSMITTER CONNECTION:
- TURN OFF POWER
- CONNECT THE POWER SUPPLY
AND RECEIVER TO TERM 1 AND
TERM 2 OF THE GAGE AS SHOWN
- CONNECT POWER SUPPLY (+) TO
TERMINAL 4 (REQUIRED FOR THE
OPTIONAL DISPLAY ONLY)
- INSTALL THE DISPLAY’S CONNECTOR
- TURN ON POWER
BE SURE TO TURN OFF POWER WHEN
CONNECTING OR REMOVING THE
DISPLAY’S CONNECTOR. FAILURE TO DO
SO CAN RESULT IN THE GAGE DAMAGE.
SPAN
ZERO
PRESS AND HOLD TO
ZERO THE DISPLAY PRESS TO
DISPLA
Y
THE GAGE’S
PRESSURE
RANGE
LED DISPLAY CONNECTOR
YELLOW
OPTIONAL LED DISPLAY
10-30 VDC
(40 ma)
10-30 VDC
(100 ma)
+
-
+
-
RECEIVER
mA
LED DISPLAY
NEGATIVE SUPPLY
LED DISPLAY
POSITIVE SUPPLY
TERM 1 (+)
TERM 2 (-)
TERM 3 (-)
TERM 4 (+)
BE SURE TO TURN OFF POWER WHEN
CONNECTING OR REMOVING THE
DISPLAY’S CONNECTOR. FAILURE TO DO
SO CAN RESULT IN THE GAGE DAMAGE.
TRANSMITTER CONNECTION:
- TURN OFF POWER
- CONNECT THE POWER SUPPLY
AND RECEIVER TO TERM 1 AND
TERM 2 OF THE GAGE AS SHOWN
- CONNECT LED POWER SUPPLY (-)
TO TERMINAL 3
- CONNECT LED POWER SUPPLY (+)
TO TERMINAL 4
- INSTALL THE DISPLAY’S CONNECTOR
- TURN ON POWER
POWER
SUPPLY
LED SUPPLY
POWER SUPPLY
A
A
SECTION A-A
TERMINAL 1: (+)
TERMINAL 2: (-)
TERMINAL 3:
(GROUND)
TERMINAL 4: (-)
TERMINAL 1: (+)
B; [+]
C; [V
out +]
A; [-]
B; [+]
C; [GND]
A; [-]
3-5/16 [84.14]
7/8
[22.23]
HEX
1/4 NPT Ø55/64
[21.83]
2-27/64 [61.52]

VOLTAGE (0-5, 1-5, 0-10, 1-6 or 2-10 VDC) OUTPUT OPERATION
(Other outputs contact the factory) See Figure G for connection of the power supply,
transmitter and receiver.
Conduit Housing (-CH) Electrical connections to the pressure transmitters are
made to the terminal block located inside the housing. Remove the screws and lift
off the cover. Wire as shown in Figure G or Figure H. Use Figure G for voltage output
connection. Use Figure H for voltage output with optional LED display connection. If
ordering optional pre-wired cable, black wire is negative (-), red wire is positive (+) and
white wire is +Vout.
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
I. For optional 4-pin M-12 connector, wire to pins as shown in Figure J. 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 (+) 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
L. For optional 4-pin M-12 connector, wire to pins as shown in Figure M. If utilizing
optional A-164 cable for M-12 connection, brown wire corresponds to pin #1, white #2,
blue #3, and black #4.
MAINTENANCE
After nal 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 eld repairable and should be returned if
repair is needed (eld 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.
Note: Please do not cover or insert objects into vent hole.
PRESSURE
TRANSMITTER
RECEIVER
2 BLACK (COMMON) POWER
SUPPLY
1 RED
3 WHITE (+V OUT)
4 SILVER
SHIELD WIRE
(NOT CASE GROUNDED)
V IN
PRESSURE
TRANSMITTER
RECEIVER
2 BLACK (COMMON)
POWER
SUPPLY
5 VDC
±10%
1 RED
3 WHITE (+V OUT)
4 SILVER
SHIELD WIRE
(NOT CASE GROUNDED)
V IN
Figure G: Voltage output connection
Figure H: Voltage output with optional LED display connection
Figure I Figure J
Figure L Figure M
Figure K: Voltage output connection
SPAN
ZERO
PRESS AND HOLD TO
ZERO THE DISPLAY PRESS
TO
DISPLAY TH
E
GAGE’S
PRESSURE
RANGE
LED DISPLAY CONNECTOR
YELLOW
OPTIONAL LED DISPLAY
TERM 1 (+)
TERM 2 (-)
TERM 3 (-)
TERM 4 (+)
BE SURE TO TURN OFF POWER WHEN
CONNECTING OR REMOVING THE
DISPLAY’S CONNECTOR. FAILURE TO DO
SO CAN RESULT IN THE GAGE DAMAGE.
TRANSMITTER CONNECTION:
- TURN OFF POWER
- CONNECT POWER SUPPLY
(+) TO TERMINAL 1
- CONNECT POWER SUPPLY
(-) TO TERMINAL 2 AND TO
THE RECEIVER (-)
- CONNECT THE RECEIVER
(+) TO TERMINAL 3
- CONNECT LED POWER SUPPLY
(+) TO TERMINAL 4
- INSTALL THE DISPLAY’S
CONNECTOR
- TURN ON POWER
LED DISPLAY POSITIVE SUPPLY
+
-
-
+
+ V OUT
RECEIVER
POWER
SUPPLY
A
A
SECTION A-A
TERMINAL 1: (+)
TERMINAL 2: (-)
TERMINAL 3: [OUTPUT]
A
A
SECTION A-A
TERMINAL 1: (+)
TERMINAL 2: (-)
TERMINAL 3: [OUTPUT]
TERMINAL
1: (+)
TERMINAL 4: (-)
TERMINAL
3:
(GROUND)
TERMINAL 2:
(Vout)
TERMINAL
1: (+)
TERMINAL 4: (-)
TERMINAL
3:
(GROUND)
TERMINAL 2:
(Vout)

Printed in U.S.A. 2/18 FR# 443271-00 Rev.21©Copyright 2018 Dwyer Instruments, Inc.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [email protected]
NOTES
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