Dwyer Instruments 629C series Specifications-Installation And Operating Instructions
Dwyer Instruments 629C series are wet/wet differential pressure transmitters that are designed to monitor differential pressure of compatible gases and liquids with 0.5% accuracy. They are suitable for use in various industrial applications, including:
- Monitoring liquid levels in tanks or reservoirs
- Measuring pressure drop across filters or other components
- Controlling pumps or valves based on pressure readings
- Providing feedback to PLCs or other controllers
The 629C series transmitters are available in a variety of ranges, from 0 to 5 psid up to 0 to 30 bar differential. They feature dual pressure sensors that convert pressure changes into a 4 to 20 mA or voltage output signal. The transmitters are designed to meet NEMA 4X (IP66) weatherproof construction standards, making them suitable for use in harsh environments.
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Series 629C Wet/Wet Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin P-629C
5-15/16 [150.88]
1/4 NPT FEMALE FITTING
7 [177.80]
OPTIONAL 1/4 NPT MALE FITTING
43/64
[17.15]
1-11/32
[34.29]
3-7/64
[78.83]
1-27/64
[35.98]
1-31/32
[50.16]
OPTIONAL
LCD
The SERIES 629C Wet/Wet Differential Pressure Transmitter monitors differential pressure of compatible gases and liquids with 0.5% accuracy. The design employs dual pressure sensors converting pressure changes into a 4 to 20 mA or voltage output signal. Small internal volume and minimal moving parts result in exceptional response and reliability. The wiring terminals and zero adjustment button are easily accessed under the removable cover. The Series 629C is designed to meet NEMA 4X (IP66) weatherproof construction.
RANGE
Range Number Range
01
02
12
13
14
15
07
08
09
11
16
17
18
19
03
04
05
06
0 to 5 psid
0 to 10 psid
0 to 25 psid
0 to 50 psid
0 to 100 psid
0 to 150 psid
0 to 200 psid
0 to 300 psid
0 to 500 psid
0 to 0.5 bar differential
0 to 1 bar differential
0 to 2 bar differential
0 to 4 bar differential
0 to 6 bar differential
0 to 10 bar differential
0 to 15 bar differential
0 to 20 bar differential
0 to 30 bar differential
Working Pressure* Over Pressure
10 psi
20 psi
50 psi
100 psi
200 psi
300 psi
400 psi
600 psi
1000 psi
1 bar
2 bar
4 bar
8 bar
12 bar
20 bar
30 bar
40 bar
60 bar of up to ±3% of full scale.
Note: Over pressure of all models with 3-way valve is 100 psi.
Table 1: Pressure Limits
50 psi
50 psi
120 psi
250 psi
500 psi
750 psi
1000 psi
1200 psi
2000 psi
3 bar
8 bar
8 bar
18 bar
18 bar
50 bar
60 bar
80 bar
120 bar
*Pressures exceeding the working pressure limit may cause a calibration shift
SPECIFICATIONS
Service: Compatible gases and liquids.
Wetted Materials: Without valve: 316,
316L SS. Additional wetted parts with valve option: Buna-N, silicone grease,
PTFE, brass 360, copper, and reinforced copolymer.
Accuracy: ±0.5% FS (includes linearity, hysteresis & repeatability).
Stability: ±1% FS/year.
Temperature Limits: 0 to 200°F (-18 to
93°C).
Compensated Temperature Limits: 0 to 175°F (-18 to 79°C).
Pressure Limits: See Table 1.
Thermal Effects: Avg 0.04%/°F
(0.072%/°C) (includes zero and span).
Power Requirements: 2-wire: 10 to 35
VDC; 3-wire: 13 to 35 VDC or isolated 16 to 33 VAC (reverse polarity protected).
Output Signal: 2-wire: 4 to 20 mA;
3-wire: Field selectable 0 to 5, 1 to 5, 0 to 10, or 2 to 10 VDC.
Zero and Units: Push buttons inside conduit enclosure.
Response Time: 400 msec.
Loop Resistance: Current output: 0 to 1250 Ω (max), Rmax = 50(Vps-10);
Voltage output: Minimum load resistance
= 5 kΩ.
Current Consumption: 28 mA (max).
Electrical Connections: Removable terminal block; 1/2˝ female NPT conduit.
Process Connections: 1/4˝ female or male NPT.
Display: Optional 4-1/2 digit LCD field attachable display.
Enclosure Rating: Designed to meet
NEMA 4X (IP66) for non-LCD models.
Mounting Orientation: Not position sensitive.
Weight: 10.1 oz (286 g).
Agency Approvals: CE.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Find Quality Products Online at: www.
Phone: 219/879-8000
GlobalTestSupply
.com
www.dwyer-inst.com
e-mail: [email protected]
MODEL CHART
Example
Series
Range
Housing
Process
Connection
Electrical
Connection
629C -01 -CH -P1 -E1 -S1 -3V
629C
01
02
03
04
05
06
12
13
14
15
07
08
09
11
16
17
18
19
CH
P1
P2
E1
E2
E3
E5
E6
629C-01-CH-P1-E1-S1-3V
Wet/wet differential pressure transmitter
0 to 5 psid
0 to 10 psid
0 to 25 psid
0 to 50 psid
0 to 100 psid
0 to 150 psid
0 to 200 psid
0 to 300 psid
0 to 500 psid
0 to 0.5 bar differential
0 to 1 bar differential
0 to 2 bar differential
0 to 4 bar differential
0 to 6 bar differential
0 to 10 bar differential
0 to 15 bar differential
0 to 20 bar differential
0 to 30 bar differential
Conduit housing, NEMA 4X (IP66)
1/4˝ male NPT
1/4˝ female NPT
Cable gland with 3´ of prewired cable
Cable gland with 6´ of prewired cable
Cable gland with 9´ of prewired cable
1/2˝ female NPT conduit
M-12 4 pin connector
Signal Output
Options
S1
S3
3V
AT
FC
LCD
NIST
PRESET
4-20 mA
Field selectable 0-5, 1-5, 0-10, 2-10 VDC
3-way valve
Aluminum tag
Factory calibration certificate
LCD indication
NIST traceable certificate
Preset transmitter
*Pressures exceeding the working pressure limit may cause a calibration shift of up to ±3% of full scale.
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.com
INSTALLATION
1. Location: Select a location where the temperature of the unit will be between
0 and 200°F (-18 to 93°C). Distance from the receiver is limited only by total loop resistance (see electrical connections). The tubing feeding pressure to the instrument can be practically any length required, but long lengths will increase the response time slightly. Mount the instrument in a location that will not be subject to excessive temperature, shock, or vibration.
2. Position: A vertical position is recommended (pressure connections pointing horizontally) since that is how all standard models are spanned and zeroed at the factory. They can be used at other angles, but may require final zeroing. Due to potential condensation buildup that may travel down conduit or cable and into the housing, it is recommended to install with the electrical conduit or cable gland pointing downward.
3. Pressure Connection: Dual 1/4“ NPT pressure connections are provided. Use pipe thread sealant tape or other suitable pipe joint compound when making connection to the pressure source. Avoid excess sealant which could block the pressure passage.
When monitoring liquid pressures, air trapped in the lines can cause incorrect readings.
Bleed fittings or similar mechanisms should be used to bleed off any trapped air.
Optional 3-Way Valve
For applications where higher line pressures may be encountered at installation or when it is necessary to remove the transmitter for maintenance without interrupting the process, the optional three way valve is recommended. (See Figure 1)
ELECTRICAL CONNECTIONS
Shielded cable is recommended for control loop wiring. Electrical connections to the
Series 629C 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 3 or 4. Use
Figure 3 for current output connection. Use Figure 4 for current output with optional
LCD display. If ordering pre-wired cable, black wire is negative (-) and red wire is positive (+).
PRESSURE
TRANSMITTER
1
2
3
4
VIN
COM
+
RECEIVER
-
-
+
POWER
SUPPLY
10-35 VDC
SHIELD
Figure 3: Current Output Connection
UNIT BUTTON-PRESS TO TOGGLE THE
LOW [-]
PRESSURE
CONNECTION
UNIT [PSID/BARD] ON THE LCD
ZERO BUTTON- PRESS AND
HOLD TO ZERO THE GAGE
HI [+]
PRESSURE
CONNECTION
7-17/64 [184.66]
2-13/32
[60.96]
POWER
SUPPLY
-
Vin [TERM #1]
+
Com [TERM #2]
RECEIVER SHIELD [TERM #4]
RED
BLACK
BLUE
ORANGE
YELLOW
WHITE
LCD CONNECTOR
5-19/32
[142.11] 3-63/64
[101.02]
4-17/64
[108.33]
2-25/64
[60.84]
3 [76.19]
Figure 1: 629C with Optional 3-Way Valve
1-37/64
[40.14]
Installation with 3-way valve option. Begin with valve V1 open and valves V2 and
V3 closed. (See Figure 2) Slowly open valves V2 and V3. Once the pressure has stabilized and is equal on the high and low side of the transmitter, valve V1 can be closed and normal operation can proceed.
TRANSMITTER CONNECTION INSTRUCTION:
- TURN OFF POWER SUPPLY.
- CONNECT THE POWER SUPPLY AND RECEIEVER TO Vin [TERM #1] AND Com
[TERM #2] OF THE GAGE AS SHOWN.
- INSTALL THE LCD'S CONNECTOR TO THE GAGE AS SHOWN.
- TURN ON POWER.
CAUTION: BE SURE TO TURN OFF POWER WHEN CONNECTING OR REMOVING
THE LCD CONNECTOR. FAILURE TO DO SO CAN RESULT IN GAGE DAMAGE.
Figure 4: Current Output with Optional LCD
BLEED FITTING
HIGH SIDE
BLEED FITTING
LOW SIDE
Wire Length – The maximum length of wire connecting transmitter and receiver is a function of wire size and receiver resistance. Wiring should not contribute to more than 10% of receiver resistance to total loop resistance. For extremely long runs (over
1000 ft or 305 m), choose receivers with higher resistance to minimize size and cost of connecting leads. When wiring length is under 100 ft (30.5 m), lead wire as small as 22 AWG can be used.
Current (4 to 20 mA) Output Operation – An external power supply delivering 10 to
35 VDC with minimum current capability of 40 mA DC (per transmitter) is required to power the control loop. See Figure 3 for connection of the power supply, transmitter, and receiver. The range of the appropriate receiver load resistance (RL) for the DC power supply voltage available is expressed by the formula
R
L
max = vps - 10
20 mA DC
Figure 2: Bleed Fitting Connections
To ensure proper pressures will be detected by the 629C, use the bleed fittings provided with this package to free media of bubbles. Before applying pressure to the process connections, turn V1 to the open position and back off either the low or high side bleed hex nut. Next, apply pressure. After the flowing liquid is free of bubbles, retighten the bleed hex nut.
Before removing the transmitter from operation, open valve V1, then close valves V2 and V3.
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VOLTAGE (0 TO 5, 1 TO 5, 0 TO 10, OR 2 TO 10 V) OUTPUT OPERATION
To select the voltage output that is going to be used, configure the dip switches according to the Figure 5 below.
UNIT BUTTON-PRESS TO TOGGLE THE
UNIT [PSID/BARD] ON THE LCD
LOW [-]
PRESSURE
CONNECTION
ZERO BUTTON-PRESS AND
HOLD TO ZERO THE GAG
HI [+]
PRESSURE
CONNECTION
0 to 5 VDC
1 2
1 to 5 VDC
1 2
ON
OFF
ON
OFF
-
+
-
POWER
SUPPLY
13-35 VDC
OR ISOLATED
16-33 VAC
Vin [TERM #1]
Com [TERM #2]
+ Vo [TERM #3]
RECEIVER
SHILED [TERM #4]
RED
BLACK
BLUE
ORANGE
YELLOW
WHITE
LCD CONNECTOR
VOLTAGE SELECTION
DIP SWITCH
0 to 10 VDC
1 2
2 to 10 VDC
1 2
ON
OFF
ON
OFF
Figure 5: Voltage Output Dip Switch Selection
For voltage outputs, wire as shown in Figure 6 for voltage output connection. Use
Figure 7 for voltage output with optional LCD display. Terminal 1 is positive (+), terminal 2 is negative (-), and terminal 3 is +Vout. If ordering optional prewired cable, black wire is negative (-), red wire is positive (+), and white wire is +Vout. For optimal accuracy, use a separate common wire for the receiver.
TRANSMITTER CONNECTION INSTRUCTION:
- TURN OFF POWER SUPPLY.
- CONNECT THE POWER SUPPLY [+] TO Vin [TERM #1] AND [-] TO Com [TERM #2] OF
THE GAGE AS SHOWN.
- CONNECT THE RECEIVER [+] TO Vo [TERM #3] OF THE GAGE AND RECEIVER [-] TO
POWER SUPPLY [-].
- INSTALL THE LCD'S CONNECTOR TO THE GAGE AS SHOWN.
- SET VOLTAGE SELECTION DIP SWITCH TO DESIRED VOLTAGE OUTPUT.
- TURN ON POWER.
CAUTION: BE SURE TO TURN OFF POWER WHEN CONNECTING OR REMOVING THE
LCD CONNECTOR. FAILURE TO DO SO CAN RESULT IN GAGE DAMAGE.
Figure 7: Voltage Output with Optional LCD Display
PRESSURE
TRANSMITTER
1
2
3
4
VIN
COM
VO
SHIELD
+
RECEIVER
-
Figure 6: Voltage Output Connection
+
POWER
SUPPLY
13-35 VDC
OR 16-33 VAC
MAINTENANCE/REPAIR
Upon final installation of the Series 629C Wet/Wet Differential Pressure Transmitter, no routine maintenance is required. The Series 629C is not field serviceable and is not possible to repair the unit. Field repair should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact customer service to receive a Return Material Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any additional application notes.
©Copyright 2016 Dwyer Instruments, Inc.
Printed in U.S.A. 3/16
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Find Quality Products Online at: www.
Phone: 219/879-8000
GlobalTestSupply
.com
FR# 443277-10
www.dwyer-inst.com
e-mail: [email protected]

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