Dwyer Instruments One-Touch 616OT Series User manual

DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: [phone] e-mail: [email protected]
The Series 616OT One-Touch®Differential Pressure Transmitter is
an extremely versatile transmitter for monitoring pressure. The Series
616OT senses the pressure of air and compatible gases and sends a
standard 4-20 mA output signal. The single button simultaneous calibra-
tion of both zero and span reduces product installation and set up time.
INSTALLATION
Mounting:
The transmitter should be mounted on a vertical surface with the con-
nections directed down to prevent moisture from entering either the
pressure ports or the electrical cable entry.
Electrical Connection:
2-Wire Operation:
CAUTION: DO NOT EXCEED SPECIFIED SUPPLY
VOLTAGE RATINGS. PERMANENT DAMAGE NOT
COVERED BY WARRANTY WILL RESULT. 2-WIRE
UNITS ARE NOT DESIGNED FOR AC VOLTAGE OPER-
ATION.
Series 616OT One-Touch®Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-43-OT
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Accuracy: ±1%.
Thermal Effect: ±0.05%/°F (±0.03%/°C).
Stability: ±1% F.S. / year.
Temperature Limits: 0 to 140°F (-18 to 60°C).
Pressure Limits: 1 psi maximum, operation; 10 psi, burst.
Power Requirements: 2-wire. 10 to 35 VDC; 3-wire, 15 to 36 VDC.
Output Signal: 2-wire, 4 to 20 mA; 3-wire; 0 to 10 V.
Response Time: 300 ms.
Zero & Span Adjustments: One digital push button, zero & span cali-
bration.
Loop Resistance: Current output: 1250 Ohm max. Voltage output:
min. load resistance 1000 Ohm.
Current Consumption: 40 mA max.
Electrical Connections: Removable European Style Terminal Block
for 16 to 26 AWG.
Electrical Entry: Cable gland for 0.114 to 0.250” (2.9 to 6.4 mm) diam-
eter cable.
Process Connections: Barbed, dual size to fit 1/8” (3 mm) and 3/16”
(5 mm) I.D. rubber or vinyl tubing.
Enclosure Rating: NEMA 4X (IP65).
Weight: 4.0 oz (115 g).
1-1/8
[28.58] 1/8
[3.175]
4-3/8
[111.13]
3-7/8
[98.43]
2-27/64
[61.52]
3-19/64
[83.74]
2x ø3/16
[ø4.76]
3-21/64
[84.53]
E-43-OT:Magnesense bulletin 3/25/10 11:54 AM Page 1

DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A. Fax: [phone] e-mail: [email protected]
Electrical Connection:
2-Wire Operation, continued:
The connections to the transmitter are made through a two circuit
European style terminal block CONN6 located at the top of the main P.C.
board. Polarity is indicated by + and – signs on the P.C. board. Do not
connect to (V).
An external power supply delivering 10 to 35 VDC with a minimum cur-
rent capability of 40 milliamps must be used to power the control loop in
which the 616OT transmitter is connected. Refer to Fig. 1 for connection
of the power supply, transmitter and receiver. The range of appropriate
receiver load resistances (RL) for the power supply voltage available is
given by the formula and graph in Fig. 2. Shielded two wire cable is rec-
ommended for control loop wiring and the negative side of the loop may
be grounded if desired. Note also that the receiver may be connected in
either the negative or positive side of the loop, whichever is most conve-
nient. 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.
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 higher 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 Operation:
CAUTION: DO NOT EXCEED SPECIFIED SUPPLY VOLT-
AGE RATINGS. PERMANENT DAMAGE NOT
COVERED BY WARRANTY WILL RESULT.
The connections to the transmitter are made through European style ter-
minal block. Connect the power and signal leads to the corresponding
terminals as shown in Fig. 3. When using a DC supply, the positive of the
supply should be connected to V(+) and the negative connected to (-).
Connecting the leads in reverse will not damage the device but it will not
operate. The DC supply should be capable of providing 20 mA or more
of current per 616OT transmitter.
The output of V is 0 to 10 VDC. As much as 10 mA may be drawn from
V without affecting accuracy. This limits the minimum load RL connected
to Vo to 1 KΩ or higher. Remember to keep the wiring resistance
between the output and the receiver RLlow compared to value of RL.
While the voltage at the terminals remains unchanged with a 10 mA cur-
rent flow, resistive losses in the wiring do cause errors in the voltage
delivered to RL. For a 1% accurate gauge, a good rule of thumb would be
to keep the resistance of the leads less than 0.1% of the value of RL. This
will keep the error caused by current flow below 0.1%.
To minimize noise in the signal use shielded cable. The common line
may also be grounded.
Pressure Connections
Two integral tubing connectors are provided. They are designed to fit 1/8˝
(3 mm) and 3/16” (5 mm) ID tubing. Connect the high pressure to the
High side as shown in Fig. 4. Be sure the pressure ratings of the tubing
exceed that of the operating ranges.
ONE BUTTON PRESSURE CALIBRATION
Leaving the hose barbs vented, press and hold the “Zero” switch for
about 4-5 seconds. The zero point should now be set. See Fig.4.
MAINTENANCE
Annual recalibration is suggested. No lubrication or other periodic ser-
vicing is required. Keep exterior and cover clean. Occasionally discon-
nect pressure lines to vent both sides of gauge to atmosphere and re-
zero. Do not use solvent to clean transmitter. Use only plastic compati-
ble cleaners or water.
The Series 616OT is not field serviceable 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 appli-
cation notes. Contact customer service to receive a return goods autho-
rization number before shipping.
POWER SUPPLY VOLTAGE
05101315 20 25 30 35 40
MAXIMUM VALUE (1250 Ω)
OPERATING
REGION
TOTAL RECEIVER RESISTANCE (Ω)
RL MAX = Vps - 10.0
20mA DC
1500
1400
1300
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1100
1000
900
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50
En
M
©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 3/10 FR# 01-443506-00 Rev. 1
CONN6
POWER
SUPPLY
RECEIVER
R
+
-
V
L
+
-
-+
HIGH
PORT LOW PORT CABLE
GLAND
Figure 4
Figure 3
Figure 2
Figure 1
E-43-OT:Magnesense bulletin 3/25/10 11:54 AM Page 2