APG RPM Series User manual

Operator’s Manual
AUTOMATION
PRODUCTS
GROUP, INC.
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel:[phone]•Fax:[phone]• www.apgsensors.com•E-mail:[email protected]
RPM
Series
Float Level Sensors
Rev. D6, 10/09
Doc. 9002103

RPM Series Rev. D6, 10/09
2
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
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Table of Contents
Warranty ......................................................................................... 3
Description...................................................................................... 4
Installation ................................................................................... 5-7
Wiring........................................................................................... 8-9
Analog Calibration .................................................................. 10-12
Inspection & Maintenance ............................................................ 12
Specifications ........................................................................... 13-14
CSA Certificate of Compliance ............................................... 15-18

Rev. D6, 10/09 RPM Series
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APG warrants its products to be free from defects of material and workmanship
and will, without charge, replace or repair any equipment found defective upon
inspection at its factory, provided the equipment has been returned,
transportation prepaid, within 24 months from date of shipment from factory.
THE FOREGOING WARRANTYIS IN LIEU OFAND EXCLUDESALLOTHER
WARRANTIES NOTEXPRESSLYSET FORTH HEREIN, WHETHER
EXPRESSED OR IMPLIED BYOPERATION OF LAWOR OTHERWISE
INCLUDING BUT NOTLIMITED TOANYIMPLIED WARRANTIES OF
MERCHANTABILITYOR FITNESS FORAPARTICULAR PURPOSE.
No representation or warranty, express or implied, made by any sales
representative, distributor, or other agent or representative of APG which is not
specifically set forth herein shall be binding uponAPG. APG shall not be liable
for any incidental or consequential damages, losses or expenses directly or
indirectly arising from the sale, handling, improper application or use of the
goods or from any other cause relating thereto andAPG’s liability hereunder, in
any case, is expressly limited to the repair or replacement (at APG’s option) of
goods.
Warranty is specifically at the factory. Any on site service will be provided at
the sole expense of the Purchaser at standard field service rates.
All associated equipment must be protected by properly rated electronic/
electrical protection devices. APG shall not be liable for any damage due to
improper engineering or installation by the purchaser or third parties. Proper
installation, operation and maintenance of the product becomes the
responsibility of the user upon receipt of the product.
Returns and allowances must be authorized byAPG in advance. APG will
assign a Return Material Authorization (RMA) number which must appear on
all related papers and the outside of the shipping carton. All returns are subject
to the final review by APG. Returns are subject to restocking charges as
determined by APG’s “Credit Return Policy”.
• Warranty and Warranty Restrictions

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•Description
The RPM utilizes reed switches in the instrument’s stem and a permanent
magnet in the float. As the float rises or falls with the level of the liquid, the
magnet inside the float acts on the reed switches inside the stem and provides a
resistive-chain output. The RPM is also available with optional electronics that
convert the resistance output into a 4-20mA signal.
•Handling of the Intrinsically Safe RPM Series
Electrical ratings; 12 to 24 Volts DC, 4 - 20 ma
Exia Class I Division 1; Groups C, D T3C (Max. Temp. 85°C)
Vmax = 30VDC, Imax = 130ma, Ci = 3nF, Li = 0uH
ATEX Directive: 0334KEMA 05 ATEX 1207 X
II 1 G EEx ia IIB T3
-40°C ≤Ta ≤+85 °C
Ui ≤30 V, Ii ≤130 mA, Pi ≤1 W, Ci ≤3 nF, Li ≤0 mH
All repairs and adjustments of the RPM must be made by the factory. To
modify, disassemble, or alter the RPM on site is strictly prohibited. Do not
loosen any joints, with the exception of the housing cover for electrical
connection.
•Handling of the Explosion-Proof RPM Series
Electrical ratings; 5 to 15 Volts DC, 100 ma
Class I Division 1 Groups C & D (Max. Temp. 40°C.)
Class I Division 2; Groups C & D (Max. Temp 85°C.
Probe may be wired as a Non-Incendive device in Class I Division 2 Groups C &
D areas. All repairs and adjustments of the RPM must be made by the factory.
To modify, disassemble, or alter the RPM on site is strictly prohibited. Do not
loosen any joints, with the exception of the housing cover for electrical
connection.

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•Handling of the Explosion-Proof RPM Series
•Installation
- Unpacking -
When unpacking the instrument, exercise care not to subject the instrument to
mechanical shock. After unpacking, visually inspect the instrument for damage.
- Environment -
The RPM series intruments should be installed in an areas indoors or
outdoors which meets the following conditions:
1. The ambient temperature does not exceed -400C to 850C (-400F to
+1850F) for Class I Divison 2 or -400C to 400C (-400F to +1040F) for Class I
Divison 1.
NOTE: It is recommended that a sun shield be installed over the housing if
exposed to direct sunlight.
2. The medium temperature does not exceed -400C to 850C (-400F to +1850F) for
Class I Divison 2 or -400C to 400C (-400F to +1040F) for Class I Divison 1.
3. Relative humidity up to 100%
4. Pollution Degree 2
5. Measurment Category II
6. Altitude 2000 m or less.
7. Locate the sensor away from strong magnetic fields such as those
produced by motors, transformers, solenoid valves, etc.
8. The medium is free from metallic substances and other foreign matter.
9. No corrosive gases such as NH3, SO2, Cl2, etc.
10. No excessive vibration
11. Ample space for maintenance and inspection.

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•Installation
- Location -
Do not locate the RPM sensor near inlets/outlets.
If there is surface wave action, then it may be advisable to use a stilling tube. If
a stilling tube is used, drill vent holes in the tube and use a spacer bottom
mounting bracket to assure the probe is centered in the tube and the can move
without interference.
Wave action will cause signal bounce. Use a stilling tube to provide a
smooth output signal.
- Mounting -
The RPM probe must be secured top and bottom. The bottom of the probe can
be secured using stainless steel bottom mounting bracket (p/n 135396) or
similar stainless steel mounting method. This bracket is fixed to the bottom of
the vessel and the
probe stem seats inside of it.
Mounting in this way will prevent any
lateral movement and prevent the float
from coming off of stem during use.
4.00"
0.75"
0.50"
3.21"
0.125"
Ø1.500" .083" Wall Tubing
Ø0.265" 2 places
Part Number 135396
Inflow
Bottom Mounting Bracket
Mounting Bracket
Stilling Tube
Inflow
Bottom Mounting Bracket
Mounting Bracket Top of Tank Top of Tank

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1. Clamp Mounting
The most common method of mounting the top of the RPM probe is by
clamping it into place. Top stainless steel mounting bracket part number 125603
or similar can be used. The U-bolt is tightened around the 1.25” stainless steel
stem just below the union. The bracket is permanently mounted to the top of the
tan. It is important to keep mounting hardware clear of float travel.
2. Flange Mounting
Provide the compatible mating flange on the tank and install using a suitable
gasket.
3. Plug Mounting
Provide the compatible female boss on the tank and install the RPM with a
suitable gasket, O-ring, or thread tape.
Note: Assure that all metal parts are earthed. It must be assured that the
sensor tube is connected to the potential equalizing system and is not isolated
from it due to, for instance, tightening means.
Warning: Because the enclosure of the electronics/terminals of the Float Level
Sensor is made of aluminium, if it is mounted in an area where the use of
category 1 G apparatus is required, it must be installed such, that even in the
event of rare incidents, ignition sources due to impact and friction sparks are
excluded. Nonconductive surface of the float may be charged by
nonconductive media.
3.00"
3.00"
1.75"
0.25"
316 Stainless Steel
U Bolt
5/16" - 18 Thread
Part Number125603

RPM Series Rev. D6, 10/09
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•Intrinsically Safe Wiring
Note: Insure that all metal parts are earthed.

Rev. D6, 10/09 RPM Series
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•Explosion-Protected Wiring

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1. Set DC power supply voltage at 24VDC.
2. ConnectAmmeter in series with loop.
3. Move float to the bottom position
4. Adjust the Offset potentiometer until meter reads 4ma
5. Move float to top position
6. Adjust the Span potentiometer until the meter reads 20ma.
7. Repeat steps 3 – 6 for final adjustment.
•Analog Calibration Procedure (for models equipped with 4-
20 mA conversion board)
Choose Loop Resistance
to match application
4.25
Ammeter
COM mA
Power Supply
(24Vdc)
+-
R4
R9
STI 2001
R3
R5
J1
R7
R1
R8
D1
R2
C1
C2
D2
C3
Q1
U2
R6
U3
SPAN
OFFSET
RED BLK WH OUT 24V
4 to 20ma Out
+24vdc

Rev. D6, 10/09 RPM Series
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•Analog Calibration Procedure (for models equipped with 4-
20 mA conversion board)
Analog Board is Encapsulated
R4
R9
STI 2001
R3
R5
J1
R7
R1
R8
D1
R2
C1
C2
D2
C3
Q1
U2
R6
U3
+24vdc
4 to 20ma Out
SPAN
OFFSET
RED BLKWHOUT24V
Offset (20 mA)
Adjustment
Zero (4 mA)
Adjustment

RPM Series Rev. D6, 10/09
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Wiring for Voltage Operation
Red and Black connect to each end of a resistive chain.
The white wire is the voltage output that is connected
to different points on the resistive chain by
reed switches.
Red +5 to +15 VDC
Black Ground
White Voltage Out
•Inspection and Maintenance
Periodic inspection is necessary to keep your RPM unit in good working order.
CAUTION! Do not remove the housing cover until the atmosphere
is determined to be safe, and the power supplied to the unit is
turned off.
Keep the sensor clean.
If sediment or other foreign matter is trapped between the stem and the float,
detection errors may be caused.
Inspect probe shaft and bottom weld for any possible holes or leaks. If possible
leak is detected remove probe from service and send to factory for repair.
Inspect O-ring on cover to make sure that it is in good condition.
Never leave the housing cover off. If the cover becomes damaged or is
misplaced, replace immediately.
White
Black
Red
CSAApproved Class I Division 2 Operating Temperatu re: - 10° t Voltage Requirement s: 5t o15V ModelNo. RPM_ SerialNo.RPM-XXXXX
100K Resistor
Terminal Strip

Rev. D6, 10/09 RPM Series
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•RPM Specifications
Resolution +/- 0.39 in. (+/- 10mm.)
Maximum Length 288 in. (7.3M)
Maximum Process Temperature -400C to 850C (-400F to
1850F)
Probe Material 316 L SS.
Float Material Polyurethane Foam
Housing Material Aluminium
Modified 359 Alloy
Silicon (Si) 8.5 - 9.5 %
Magnesium (Mg) 68 - .85%
Copper (Cu) .30% max (3/10 of 1%)
Iron (Fe) .30% max (3/10 of 1%)
Housing Rating NEMA4
Hazardous Ratings:
Intrinsically Safe
Electrical ratings; 12 to 24 Volts DC, 4 - 20 ma
Exia Class I Division 1; Groups C, D T3C (Max. Temp. 85°C)
Vmax = 30VDC, Imax = 130ma, Ci = 3nF, Li = 0uH
ATEX Directive: 0334KEMA 05 ATEX 1207 X
II 1 G EEx ia IIB T3
-40°C ≤Ta ≤+85 °C
Ui ≤30 V, Ii ≤130 mA, Pi ≤1 W, Ci ≤3 nF, Li ≤0 mH

RPM Series Rev. D6, 10/09
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Explosion-Proof Electrical ratings; 5 to 24 Volts DC, 100 ma
Class I Division 1 Groups C & D (Max. Temp. 40°C.)
Class I Division 2; Groups C & D (Max. Temp 85°C).
Non-Incendive
Electrical ratings; 5 to 24 Volts DC, 100 ma
Class I Division 2; Groups C & D (Max. Temp 85°C).
Vmax = 30 VDC, Imax = 200 ma, Ci = 3nF, Li = 0

Rev. D6, 10/09 RPM Series
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RPM Series Rev. D6, 10/09
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Rev. D6, 10/09 RPM Series
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RPM Series Rev. D6, 10/09
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Rev. D5, 12/08 RPM Series
Notes
19
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AUTOMATION
APG...Providing tailored solutions
for measurement applications
PRODUCTS
GROUP, INC.
Automation Products Group, Inc.
Tel: [phone]
1/435/753-7300
Fax: [phone]
e-mail: [email protected]
www.apgsensors.com
Automation Products Group, Inc.
1025 W. 1700 N.
Logan, UT 84321