Dwyer Instruments 616KD-LR Operating Manual

Bulletin P-616KD-LR

OPTIONAL TERMINAL

Series 616KD-LR Low Range Differential Pressure Transmitter

Specications - Installation and Operating Instructions

NPT Connection Block

Integral DIN Rail Mounting Kit

Digital push buttons set

both zero and span

The SERIES 616KD-LR Low Range Differential Pressure Transmitter senses the pressure of air and compatible gases and sends a standard 4 to 20 mA and simultaneous voltage output signal. A wide range of models are available factory

calibrated to specic ranges including low ranges down to 0.1 in w.c. (25 Pa). New enclosure enables the 616KD-LR to be mounted on a 35 mm DIN rail either via its side or back DIN rail clips. The 1/8˝ NPT process connection is also available in the Series 616KD-LR.

INSTALLATION

1. Location

Select a clean, dry mounting location free from excess vibration where the temperature

will remain between 20 and 122°F (-6.7 and 50°C). The tubing supplying pressure to

the instrument can be practically any length required, but long lengths will increase response time slightly.

2. Position

A vertical position, with pressure connections pointing down, is recommended. That is

the position in which all standard models are calibrated at the factory. Consult factory

for other position orientations.

3. Pressure Connections

Two integral barbed tubing connections are provided. They are dual-sized to t both 1/8 and 3/16˝ (3.12 and 4.76 mm) I.D. tubing. Be sure the pressure rating of the tubing exceeds that of the operating ranges. The 1/8˝ NPT process connection is available

as an option as well.

COVER

5/8

[15.72]

[12.70]

ø5/32 [3.81]

MOUNTING

HOLE

2 PLACES

5/8

[15.88]

ø5/32 [3.97]

MOUNTING

HOLE

2 PLACES

1/2 [12.70]

SPECIFICATIONS

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory. Accuracy: ±0.25% FS for ±0.4˝ (100 Pa) and ±0.5˝ (125 Pa), ±0.5% FS for ±0.25˝

(60 Pa), and ±1% FS for ±0.1˝ (25 Pa). Stability: ±1% / year FSO.

Temperature Limits: 0 to 140°F (-17.8 to 60°C). Pressure Limits: 1 psi max., operation; 10 psi burst. Power Requirements: 10 to 35 VDC (2 wire), 17 to 36 VDC or isolated 21.6 to

33 VAC (3 wire). Output Signal: 4 to 20 mA (2-wire), 0 to 5 VDC, 0 to 10 VDC (3-wire). Response Time: 2.5 Hz sample rate.

Zero and Span Adjustments: Push button.

Loop Resistance: Current Output: 0 to 1250Ω max; Voltage Output: Min. load resistance 1kΩ.

Current Consumption: 40 mA max. Electrical Connections: Screw-type terminal block. Process Connections: Barbed, dual size to t 1/8˝ & 3/16˝ (3 mm & 5 mm) ID

rubber or vinyl tubing, or 1/8˝ NPT. Enclosure Rating: NEMA1 (IP20). Mounting Orientation: Vertical with pressure connections pointing down. Weight: 1.8 oz (51 g). Agency Approvals: CE.

1-1/2

[38.10]

2-3/32 [52.83] 2-13/32 [61.29]

3/4

[19.05]

COVER

1-1/2

[38.10]

2-1/4 [57.15]

2-13/32 [61.12]

2-13/32

[61.16]

1/2

19/32

[15.29]

1/8˝ NPT

2 PLACES

5/16

[7.94]

3-21/64

[84.53]

2-13/32

[61.12]

1/2

[12.70]

5/16

[7.72]

3-5/16 [84.18]

7/8

[22.23]

1-1/32 [26.19]

7/8

[22.22]

1-1/32 [26.19]

4. Electrical Connections:

CAUTION

Permanent damage not covered by warranty will result. This unit

is not designed for 120 or 240 volts AC line operation.

Electrical connections are made to the terminal block located on the top of the

transmitter. Terminals are marked 1, 2, 3 and 4 as shown below. Determine which of

the following circuit drawings applies to your application and wire accordingly. Shielded cable is recommended. Ground the shield at the power supply end only.

Do not exceed specied supply voltage ratings.

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: 219/879-8000

Fax: 219/872-9057

www.dwyer-inst.com

e-mail: info@dwyermail.com

2-Wire 4 to 20 ma Current Operation

WIRING

WIRING, AC OR DC

DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.

CAUTION

PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. SIMULTANEOUS OUTPUTS ARE NOT DESIGNED FOR AC VOLTAGE OPERATION.

The connections to the transmitter are made through terminals 2 and 3 on the terminal block as shown in Figure 2. The terminal block is removable and each of the terminals

are labeled underneath the terminal block on the circuit board.

PRESSURE TRANSMITTER

2 WIRE 4-20 mA WIRING

The range of appropriate receiver load resistances (RL) for the power supply voltage available is given by the formula listed below. Shielded 2-wire cable is recommended

for control loop wiring. Ground the shield at the power supply end only.

POWER SUPPLY

CURRENT RECEIVER

Simultaneous Current and Voltage Operation

DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.

CAUTION

PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. SIMULTANEOUS OUTPUTS ARE NOT DESIGNED FOR AC VOLTAGE OPERATION.

The connection to the transmitter are made to Terminals 1, 2, and 3 on the terminal block as shown in Figure 4. The terminal block is removable and each of the terminals are labeled underneath the terminal block on the circuit board. The AC/DC selection jumper should be set for DC operation. The voltage output and the power supply must have separate wire leads that are only joined at terminal 2 of the transmitter. Additional error may occur for the voltage output if a single wire is used or if the wires are joined

at the power supply or receiver.

POWER SUPPLY

PRESSURE TRANSMITTER

SIMULTANEOUS VOLTAGE AND CURRENT

VOLTAGE RECEIVER

CURRENT RECEIVER

MUST WIRE SEPARATE WIRES FROM POWER SUPPLY AND VOLTAGE RECEIVER TO TERMINAL 3

The receiver may be connected to either the negative or positive

NOTICE

side of the loop, whichever is most convenient. Should polarity of the transmitter or receiver be inadvertently reversed, the loop will not function properly but no damage will be done to the transmitter.

RL = Vps - 10.0

20 mA DC

The maximum length of connecting wire between the transmitter and the receiver is

a function of wire size and receiver resistance. That portion of the total current loop

resistance represented by the resistance of the connecting wires themselves should

not exceed 10% of the receiver resistance. For extremely long runs (over 1,000 feet), it is desirable to select receivers with lower resistances in order to keep the size and cost of the connecting leads as low as possible. In installations where the connecting run is no more than 100 feet, connecting lead wire as small as No. 22 ga. can be used.

3-Wire 0 to 10 V or 0 to 5V Voltage Operation

DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS.

CAUTION

PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT.

The connection to the transmitter are made to Terminals 1, 2, and 3 on the terminal block as shown in Figure 3. The terminal block is removable and each of the terminals

are labeled underneath the terminal block on the circuit board. When connecting

using a DC power source, make sure the AC/DC selection jumper is not present. If the

polarity of the transmitter is inadvertently reversed, the unit will not function properly,

but no damage will be done to the transmitter. When connecting to an AC power source, short terminals 3 and 4. Either lead of the supply power may be connected to PWR and COM without affecting the operation of the transmitter or damage to the

transmitter.

VOLTAGE RECEIVER

POWER SUPPLY

PRESSURE TRANSMITTER

SHORT 3-4 FOR

AC POWER

For the current output, the maximum allowable loop resistance (wiring + receiver resistance) is dependent on the power supply. The maximum loop voltage drop must not reduce the transmitter voltage below 17 V. The maximum loop resistance can be calculated using the following equation: RMAX = (VPS – 17.0) / 0.02 Where VPS is the power supply voltage

The equation uses 17.0 instead of 10.0 used in current only equation. This represents the minimum voltage supply which is higher on the simultaneous output conguration

due to the requirements of the voltage outputs.

Shielded 4-wire cable is recommended for control loop wiring. Ground the shield

at the power supply end only. Should the polarity of the transmitter or receiver be inadvertently reversed, the unit will not function properly, but no damage will be done to the transmitter.

For voltage outputs, the minimum receiver load is 1K Ω. The resistance due to the

wire should be low compared to the receiver load resistance. While the voltage at

the terminal block remains unchanged with a 10 mA current ow, resistive losses in the wiring do cause errors in the voltage delivered to the receiver. For a 1% accurate gauge, the resistance of the wires should be less than 0.1% of the value of the receiver load resistance. This will keep the error caused by the current ow below 0.1%.

NOTICE

calibration takes place. This delay is used to prevent stress related offsets on the lower ranges.

ZERO ADJUSTMENT

A single push button is provided to zero the transmitter. Allow transmitter to warm up for 20 minutes. The zero calibration can be set by applying zero pressure to both the pressure ports and pressing the zero button for 3 seconds.

SPAN ADJUSTMENT

The span calibration can be adjusted only after setting the zero adjustment. It must be completed within 5 minutes of the last zero calibration. The span calibration button will be ignored until the zero calibration is completed. Apply pressure to the ports of the transmitter that is associated with the maximum output of the transmitter (20 mA, 5 V, or 10 V depending on output being used). Press and hold the span button for 3 seconds. On bi-directional models, separate spans can be performed on the positive

and negative sides of the range.

There is a 5 second delay from the time the zero or span

calibration buttons is released until the time that the change in

The minimum receiver load is 1K Ω. The resistance due to the wire should be low

compared to the receiver load resistance. While the voltage at the terminal block

remains unchanged with a 10 mA current ow, resistive losses in the wiring do cause errors in the voltage delivered to the receiver. For a 1% accurate gauge, the resistance of the wires should be less than 0.1% of the value of the receiver load resistance. This will keep the error caused by the current ow below 0.1%.

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

3 WIRE VOLTAGE

MAINTENANCE/REPAIR

Upon nal installation of the Series 616KD no routine maintenance is required. The Series 616KD is not eld serviceable and should be returned if repair is needed. Field

repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact

customer service to receive a Return Goods Authorization number before shipping the product back for repair. Be sure to include a brief description of the problem plus any

additional application notes.

Phone: 219/879-8000

Fax: 219/872-9057

www.dwyer-inst.com

e-mail: info@dwyermail.com