Dwyer 629C Series Wet Differential Pressure Transmitter Instruction Manual

: June 15, 2024
: Dwyer

Table of Contents

Dwyer 629C Series Wet Differential Pressure Transmitter
Product Overview
Dimension
Information
SPECIFICATIONS
INSTALLATION
MAINTENANCE
WARRANTY
Contact
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Dwyer 629C Series Wet Differential Pressure Transmitter

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
product

Product Overview

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-1

Conduit housing with remote sensor available in 10´ or 20´ shielded or armored cable

Dimension

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-2

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 4-20 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.

Information

RANGE

Table 1: Pressure limits

RANGE

Range Number| Range| **Working Pressure*| Over Pressure**
01

02

03

04

05

06

07

08

09

11

12

13

14

15

16

17

18

19

| 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

| 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

| 50 psi

50 psi

120 psi

250 psi

500 psi

750 psi

1000 psi

1200 psi

2000 psi

3 bar

8 bar

18 bar

50 bar

60 bar

80 bar

120 bar

*Pressures exceeding the working pressure limit may cause a calibration shift of up

to ±3% of full scale.

Note: Over pressure of all models with 3-way valve is 100 psi.

Note: -3V option is only available with -P2 process connection.

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 and 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: 10-35 VDC; 3-wire: 13-35 VDC or isolated 16-33 VAC (reverse polarity protected).
Output Signal: 2-wire: 4-20 mA; 3-wire: Field selectable 0-5, 1-5, 0-10, or 2-10 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 (-RS maintains NEMA 4X on sensors and housing).
Mounting Orientation: Not position sensitive.
Weight: 10.1 oz (286 g).
Compliance: CE.

MODEL CHART

MODEL CHART

Example| 629C| -01| -CH| -P1| -E1| -S1| -3V| 629C-01-CH-P1-E1-S1-3V
Series| 629C| | | | | | | Wet/wet differential pressure transmitter
Range| | 01

02

03

04

05

06

07

08

09

11

12

13

14

15

16

17

18

19

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

Housing| | | CH R1 R2 R5

R6

Conduit housing, NEMA 4X (IP66), with remote sensor and 10´ shielded cable Conduit housing, NEMA 4X (IP66), with remote sensor and 20´ shielded cable Conduit housing, NEMA 4X (IP66), with remote sensor and 10´ armored cable Conduit housing, NEMA 4X (IP66), with remote sensor and 20´ armored cable

Process Connection| | | | P1 P2 P3

P4

| | | | 1/4˝ male NPT 1/4˝ female NPT 1/4˝ male BSPT

1/4˝ female BSPT

E9

| | | 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 (not UL)

Signal Output| | | | | | S1

S3

| | 4-20 mA

Field selectable 0-5, 1-5, 0-10, 2-10 VDC

NIST

| 3-way valve Aluminum tag

Factory calibration certificate LCD indication

NIST traceable certificate

*Pressures exceeding the working pressure limit may cause a calibration shift of up to ±3% of full-scale.

INSTALLATION

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.
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.
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

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-3

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)
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.
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.

Optional Remote Sensor Installation

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-5

For both shielded cable and armored cable versions of remote sensors option, follow standard installation procedures.

Install the high and low remote sensors in respective locations in the process. Use of thread sealant is recommended to prevent leaks. During installation, care must be taken to ensure that the serial number on the sensor matches the serial number on the transmitter housing. Additionally, a check must be made to ensure that the check box for high or low pressure on the sensor matches the check box for high or low pressure on the cable tag.

The sensor with a mark in the “High Pressure” box should be connected to the higher pressure, and the sensor with a mark in the “Low Pressure” box should be connected to the lower pressure in order to ensure accurate readings. The vent hole on the side of the unit should not be covered by anything aside from the fiber filter installed from the factory. Do not remove the fiber filter installed over the vent hole.

After sensor installation, attach the cable to the sensor by means of the M-12 connector shown in Figure 4. The cables connecting the sensors to the transmitter housing can only be disconnected at the sensor by means of the M-12 connectors. No attempt should be made to disconnect remote cables at the transmitter housing.

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-7

For applications where differential pressure is measured at high line pressure, it is recommended to install pressure sensor with a valve in each line and a shunt valve across the high and low pressure ports (see Figure 5).

ELECTRICAL CONNECTIONS

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-8 Dwyer-629C-Series-Wet-
Differential-Pressure-Transmitter-fig-9

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 6 or 7. Use Figure 6 for current output connection. Use Figure 7 for current output with optional LCD display. If ordering pre-wired cable, black wire is negative (-) and red wire is positive (+).

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 (4-20 mA) Output Operation

An external power supply delivering 10-35 VDC with minimum current capability of 40 mA DC (per transmitter) is required to power the control loop. See Figure 9 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

VOLTAGE (0-5, 1-5, 0-10, OR 2-10 V) OUTPUT OPERATION

Dwyer-629C-Series-Wet-Differential-Pressure-Transmitter-
fig-11

To select the voltage output that is going to be used, configure the dip switches according to the Figure 8 below.
Power must be cycled whenever dip switches are changed to select output.
For voltage outputs, wire as shown in Figure 9 for voltage output connection. Use Figure 10 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.

MAINTENANCE

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.

This symbol indicates waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice.

WARRANTY

WARRANTY/RETURN

Refer to “Terms and Conditions of Sale” in our catalogue 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.