APG RPM Explosion Proof Resistive Chain User Manual

PRODUCTS

AUT OMATION

Operator’s Manual

GROUP, INC.

RPM

Series

Float Level Sensors

Rev. D6, 10/09

Doc. 9002103

Automation Products Group, Inc.

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RPM Series Rev. D6, 10/09

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

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Rev. D6, 10/09 RPM Series

• Warranty and W arranty Restrictions

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 WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER
WARRANTIES NOT EXPRESSL Y SET FOR TH HEREIN, WHETHER
EXPRESSED OR IMPLIED BY OPERATION OF LAW OR OTHER WISE
INCLUDING BUT NOT LIMITED T O ANY IMPLIED WARRANTIES OF
MERCHANT ABILITY OR FITNESS FOR A PAR TICULAR 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 upon APG. 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 and APG’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 by APG 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”.

Automation Products Group, Inc.

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3

RPM Series Rev. D6, 10/09

• 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:

0334

KEMA 05 ATEX 1207 X

II 1 G EEx ia IIB T3

-40°C ≤ T a ≤ +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. T o
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. T emp. 40°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.
T o 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.

Class I Division 2; Groups C & D (Max. T emp 85°C.

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Rev. D6, 10/09 RPM Series

• 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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RPM Series Rev. D6, 10/09

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

• 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

- 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.

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smooth output signal.