AO55 Quick Start Guide - Seametrics
AO55 Blind Analog Transmitter Quick Start Guide
Components AO55 Wall Mount Unit
AO55 Meter Mount Unit
Recommended Tools • Hex wrench (5/32” or 4 mm)—for opening the cover
• Small flat head screw driver—for adjusting frequency and connecting wiring
Setting Frequency Loosen the screws and then remove the upper portion of the housing. 4
90 1
7 8
7 8
7 8
45 6
45 6
7 8
.
2 3
90 1
2 3
90 1
4
2 3
90 1
2 3
2. Locate the K-factor of the flow sensor (found on the meter or fitting, or in the instruction manual, depending on meter model). The K-factor is the number of pulses the flow sensor produces per gallon of flow.
5
45 6
1
45 6
1. Decide what flow rate should represent the top of the scale. This is ordinarily the maximum expected flow, or a value just above it, in gallons per minute.
Frequency
AO55
3. Calculate frequency, using this formula: Sensor
4-20 mA
Power
K-Factor x Top Flow (GPM) = Frequency 60 For example: 54.50 x 170 = 154.42 60 4. Round to one decimal place and enter the frequency using the four rotary Frequency switches. Note the decimal point between the third and fourth switches. 253.872.0284
Page 1 of 2
seametrics.com
AO55 Blind Analog Transmitter Quick Start Guide
Connections The only connections required on a meter mounted AO55 are the positive and negative 4-20 mA loop connections. If wall mounted, the sensor must also be connected, since it is remote from the transmitter.
Sensor Connections
4-20 mA Connections
7 8
7 8
45 6
45 6
7 8
45 6
45 6
7 8
90 1
2 3
90 1
2 3
90 1
2 3
90 1
2 3
Wiring AO55 to a Mechanical Sensor
Frequency
AO55 Power +
S
Black -
4-20 mA
White
Sensor
Red
24-36 Vdc Power Supply (may be included in control unit) + Red Black + Black
4-20 mA Device (e.g. Pump, PLC, Chart Recorder) Mechanical Sensor
7 8
7 8
45 6
45 6
7 8
45 6
45 6
7 8
2 3
Power
S
4-20 mA
Black Green White
90 1
AO55
+ 24 Vdc Red Sensor
Forward + Output _
2 3
+
90 1
Frequency
Magmeter Terminal Block
Power _
90 1
2 3
90 1
2 3
Wiring AO55 to an EX Magmeter
24-36 Vdc Power Supply (may be included in control unit) + Red Black + Black
4-20 mA Device (e.g. Pump, PLC, Chart Recorder)
For detailed information, including averaging time and calibration, please see the AO55 Instructions booklet, available on our web site at: seametrics.com/downloads. Seametrics • 19026 72nd Avenue South • Kent, Washington 98032 • USA (P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • seametrics.com
LT-14392r1.0-20161012 10/12/16
Components AO55 Wall Mount Unit
AO55 Meter Mount Unit
Recommended Tools • Hex wrench (5/32” or 4 mm)—for opening the cover
• Small flat head screw driver—for adjusting frequency and connecting wiring
Setting Frequency Loosen the screws and then remove the upper portion of the housing. 4
90 1
7 8
7 8
7 8
45 6
45 6
7 8
.
2 3
90 1
2 3
90 1
4
2 3
90 1
2 3
2. Locate the K-factor of the flow sensor (found on the meter or fitting, or in the instruction manual, depending on meter model). The K-factor is the number of pulses the flow sensor produces per gallon of flow.
5
45 6
1
45 6
1. Decide what flow rate should represent the top of the scale. This is ordinarily the maximum expected flow, or a value just above it, in gallons per minute.
Frequency
AO55
3. Calculate frequency, using this formula: Sensor
4-20 mA
Power
K-Factor x Top Flow (GPM) = Frequency 60 For example: 54.50 x 170 = 154.42 60 4. Round to one decimal place and enter the frequency using the four rotary Frequency switches. Note the decimal point between the third and fourth switches. 253.872.0284
Page 1 of 2
seametrics.com
AO55 Blind Analog Transmitter Quick Start Guide
Connections The only connections required on a meter mounted AO55 are the positive and negative 4-20 mA loop connections. If wall mounted, the sensor must also be connected, since it is remote from the transmitter.
Sensor Connections
4-20 mA Connections
7 8
7 8
45 6
45 6
7 8
45 6
45 6
7 8
90 1
2 3
90 1
2 3
90 1
2 3
90 1
2 3
Wiring AO55 to a Mechanical Sensor
Frequency
AO55 Power +
S
Black -
4-20 mA
White
Sensor
Red
24-36 Vdc Power Supply (may be included in control unit) + Red Black + Black
4-20 mA Device (e.g. Pump, PLC, Chart Recorder) Mechanical Sensor
7 8
7 8
45 6
45 6
7 8
45 6
45 6
7 8
2 3
Power
S
4-20 mA
Black Green White
90 1
AO55
+ 24 Vdc Red Sensor
Forward + Output _
2 3
+
90 1
Frequency
Magmeter Terminal Block
Power _
90 1
2 3
90 1
2 3
Wiring AO55 to an EX Magmeter
24-36 Vdc Power Supply (may be included in control unit) + Red Black + Black
4-20 mA Device (e.g. Pump, PLC, Chart Recorder)
For detailed information, including averaging time and calibration, please see the AO55 Instructions booklet, available on our web site at: seametrics.com/downloads. Seametrics • 19026 72nd Avenue South • Kent, Washington 98032 • USA (P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • seametrics.com
LT-14392r1.0-20161012 10/12/16
