Thermatel TDF-TDL TSF-TSL Instruction Manual 54-601

Thermatel®
Installation and Operating Manual
Thermal Dispersion
Flow/Level Switch
Model TDF/TDL
Model TSF/TSL
Read this Manual Before Installing
This manual provides information on the Thermatel
Thermal Dispersion Flow/Level Switch. It is important
that all instructions are read carefully and followed in
sequence. The QuickStart Installation instructions are a
brief guide to the sequence of steps for experienced technicians to follow when installing the equipment. Detailed
instructions are included in the Complete Installation
section of this manual.
Conventions Used in this Manual
Certain conventions are used in this manual to convey
specific types of information. General technical material,
support data, and safety information are presented in
narrative form. The following styles are used for notes,
cautions, and warnings.
Notes
Notes contain information that augments or clarifies
an operating step. Notes do not normally contain
actions. They follow the procedural steps to which
they refer.
Cautions
Cautions alert the technician to special conditions that
could injure personnel, damage equipment, or reduce
a component’s mechanical integrity. Cautions are also
used to alert the technician to unsafe practices or the
need for special protective equipment or specific materials. In this manual, a caution box indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury.
Warnings
Warnings identify potentially dangerous situations or
serious hazards. In this manual, a warning indicates an
imminently hazardous situation which, if not avoided,
could result in serious injury or death.
Safety Messages
The Thermatel system is rated by the IEC for use in
Category II, Pollution Degree 2 installations. Follow all
standard industry procedures for servicing electrical and
computer equipment when working with or around high
voltage. Always shut off the power supply before touching
any components. Although high voltage is not present in
this system, it may be present in other systems.
WARNING! Explosion hazard. Do not connect or disconnect equipment unless power has been switched off or
the area is known to be non-hazardous.
Low Voltage Directive
For use in Category II installations. If equipment is used
in a manner not specified by the manufacturer, protection
provided by equipment may be impaired.
Notice of Copyright and Limitations
Copyright © 2003 Magnetrol International
All rights reserved
Magnetrol/STI reserves the right to make changes to the
product described in this manual at any time without
notice. Magnetrol/STI makes no warranty with respect to
the accuracy of the information in this manual.
Warranty
All Magnetrol/STI electronic level and flow controls are
warranted free of defects in materials or workmanship for
one full year from the date of original factory shipment.
If returned within the warranty period; and, upon factory
inspection of the control, the cause of the claim is determined to be covered under the warranty; then,
Magnetrol/STI will repair or replace the control at no cost
to the purchaser (or owner) other than transportation.
Magnetrol/STI shall not be liable for misapplication,
labor claims, direct or consequential damage or expense
arising from the installation or use of equipment. There
are no other warranties expressed or implied, except
special written warranties covering some Magnetrol/STI
products.
Quality Assurance
The quality assurance system in place at Magnetrol/STI
guarantees the highest level of quality throughout the
company. Magnetrol/STI is committed to providing full
customer satisfaction both in quality products and
quality service.
Magnetrol’s quality assurance system is
registered to ISO 9001 affirming its
commitment to known international
quality standards providing the
strongest assurance of product/service
quality available.
Electrical components are sensitive to electrostatic discharge. To prevent equipment damage, observe safety
procedures when working with electrostatic sensitive
components.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
Thermatel
Model TDF/TDL and TSF/TSL
Thermal Dispersion Flow/Level Switch
Table of Contents
1.0 Description
1.1 Principle of Operation...........................................1
2.0 Installation
2.1 Unpacking.............................................................1
2.2 Quick Start...............................................................2
2.3.1 Mounting Position and Location ................2
2.3.2 General Mounting Requirements................2
2.4 Installation ............................................................3
2.5 Electrostatic Discharge (ESD) Handling Procedure.3
2.6 Wiring...................................................................4
2.6.1 Relay Connections......................................5
2.6.2 Chart Notes and Definitions ......................6
2.6.3 Remote Electronics Wiring .........................6
2.7 Operation and Calibration ....................................7
2.7.1 Flow Sensing Applications ..........................7
2.7.2 Level Sensing Applications..........................9
2.7.3 Adjust Set Point........................................10
2.7.4 Time Delay...............................................10
2.7.5 Electronic Self-test ....................................10
2.7.6 Advanced Calibration Procedure...............11
2.7.7 Power On Delay .......................................11
3.0 General Information
3.1 Maintenance........................................................12
3.1.1 Cleaning ...................................................12
3.1.2 Probe Replacement–Integral Housing.......12
3.1.3 Probe Replacement–Remote Housing.......12
3.1.4 Probe Replacement–Remote Housing.......13
4.0 Reference Information
4.1 Specifications.......................................................14
4.2 Troubleshooting...................................................17
4.3 Agency Approvals ................................................17
4.3.1 FM (Factory Mutual)................................17
4.3.2 CSA (Canadian Standards Association).....18
4.3.3 CENELEC ...............................................18
4.3.4 SAA ..........................................................18
4.3.5 Explosion Proof ........................................19
4.4 Parts ....................................................................19
4.4.1 Replacement Parts Drawings.....................19
4.4.2 Replacement Parts ....................................20
4.5 Model Numbers ..................................................21
4.5.1 Electronic Models .....................................21
4.5.2 Electronic Models .....................................22
4.5.3 Electronic Models .....................................23
4.5.4 Electronic Models .....................................24
4.5.5 Electronic Models .....................................24
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
1.0
Description
Thermatel Flow/Level Switches use state-of-the-art thermal
dispersion technology for gas flow and liquid flow/level
monitoring and control. Flow/level detection is accomplished by sensing changes in the heat transfer characteristics of the media. The sensor is available in 316L stainless
steel, Hastelloy C, or Monel welded construction with no
moving parts. The easy to install and adjust units provide
reliable, low maintenance performance in the most
demanding applications.
1.1
Principle of Operation
The Thermatel Flow/Level Switch consists of a dual element
sensing assembly mounted integrally to the electronics,
or the sensor may be remote mounted up to 500 feet
(150 meters) from the electronics.
Each element of the sensor is a miniature RTD (Resistance
Temperature Detector). One element measures the temperature of the process at the sensor location, providing a
reference temperature. The second RTD is self-heated to
establish a temperature differential above the reference
temperature. The cooling effect on the heated RTD,
caused by the presence of flow or level, decreases the
differential temperature between the two RTDs. This
decrease in temperature differential is then converted to a
relay actuation. The sensors are suitable for operation in
temperatures of -100° F to +850° F (-73° C to +454° C).
2.0
Installation
2.1
Unpacking
Unpack the instrument carefully, making sure all components
have been removed from the packing material. Inspect all
components for damage, and report any concealed damage
to the carrier within 24 hours.
Check the contents of the carton, making sure it agrees
with the packing slip and the purchase order. Verify that
the model number imprinted on the nameplate matches
the number on the packing slip and the purchase order.
Report any discrepancies to the factory. Check and record
the serial number for future reference when ordering parts.
1
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
2.2
Quick Start
Unless ordered with factory calibration, the Thermatel
switch is adjusted for a level switch between air and
water. The set point of the unit must be adjusted for
your application.
To calibrate for other applications, adjust the set point
potentiometer, P1. Turning P1 clockwise decreases the
sensitivity for use as a liquid flow switch. Turning P1
counterclockwise increases the sensitivity. Refer to
Operation and Calibration section on page 5 for
detailed procedure.
The gain adjustment is factory set to handle the majority
of applications. However, there may be occasions when
standard set point adjustment using P1 does not provide
the desired performance. In these cases, adjust the gain
potentiometer (P3) following the directions on page 7
(also refer to Probe Replacement and Gain Adjustment
on Page 13).
2.3
Figure 1
Mounting
2.3.1 Mounting Position and Location
Thermatel Flow/Level Switches should be located to allow
easy access for service. Electronics should not be exposed
to ambient temperature above +160° F (+71° C) or below
-40° F (-40° C). Special precaution should be taken to
prevent exposure to corrosive atmosphere, excessive vibration, shock or physical damage.
2.3.2 General Mounting Requirements
Figure 2
Thermatel Flow/Level Switches are shipped assembled
to the sensor. Units may be mounted in any position or
orientation. Refer to Figures 1 and 2.
Note: When installed in a nozzle, the sensor tips must clear the
nozzle.
Note: All wiring, conduit and electrical fittings must conform to
local electrical codes for the location selected.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
2
2.4
Installation
The Thermatel Flow/Level Switch has a standard 3⁄4" NPT
mount designed for easy installation through a threaded
port. Optional 1" NPT thread mount or mounting flanges
are also available.
Direction of
Level Movement
1. Apply thread sealant to the sensor and insert the sensor
into the tee junction.
Caution:
Figure 3C (Level)
Tighten unit only at the wrench flats on the sensor using
an open-end wrench. DO NOT use the instrument head
to tighten the switch to the mounting port. Rotation of
the instrument head with respect to the sensor assembly
can cause internal wiring damage.
2. Tighten the sensor directly. DO NOT apply force to the
switch housing when tightening the sensor.
Direction
of Flow
3. Make sure the sensor is properly oriented to the flow (refer
to Figures 3A and 3B) or level (refer to Figure 3C).
Caution:
The switch body must be oriented so that the flow arrow
is in the direction of the flow/level being detected. Proper
orientation is marked on the wrench flats or on the top of
the flange for reference. Refer to Figure 4.
Figure 3A (Flow)
2.5
Direction
of Flow
Figure 3B (Flow)
Electrostatic Discharge (ESD)
Handling Procedure
Magnetrol’s electronic instruments are manufactured to the
highest quality standards. These instruments utilize electronic components which may be damaged by static electricity present in most work environments. The following
steps are recommended to reduce the risk of component
failure due to electrostatic discharge:
1. Ship and store circuit boards in anti-static bags. If an antistatic bag is not available, wrap board in aluminum foil.
Do not place boards on foam packing materials.
2. Use a grounding wrist strap when installing and removing
circuit boards. A grounded workstation is also recommended.
3. Handle printed circuit boards only by the edges. Do not
touch components or connector pins.
4. Ensure that all electrical connections are completely made
and none are partial or floating. Ground all equipment to a
good, earth ground.
Figure 4
3
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
2.6
All power and control connections are made at the
terminal strip within the electronics enclosure.
12-24 AWG wire is recommended for power and
control circuits.
P1 Set
P2 Time delay
TB1
TP1
CO
JP1 Fail-safe
jumper
NC
D10 Relay
LED (red)
NO
OBSERVE ALL APPLICABLE ELECTRICAL
CODES AND PROPER WIRING PROCEDURES.
1
TP2
TB2
1. Make sure the power source is turned off.
L1
(+)
6
L2/N
(–)
2. Unscrew and remove housing cover.
P3
Alignment
pot
3. Pull power supply and control wires through conduit
connection.
D5 Power
LED
yellow
4. Connect power leads to proper terminals of the black
terminal block. Refer to Figure 5A for TDF/TDL or 5B
for TSF/TSL electronics.
a. 120 VAC - Connect “hot” wire to terminal
marked L1 and the “neutral” wire to the terminal
marked L2/N.
b. 240 VAC - Connect one wire to terminal
marked L1 and the other wire to the terminal
marked L2/N.
c. 24 VDC - Connect wires to terminals (+) and (-)
on the black terminal block.
The green screw in the bottom of the housing should be
used for grounding.
Figure 5A
TDF/TDL Electronics
JP1 Fail-safe jumper
D15 Relay
LED (red)
TB4
S1 Self-test
pushbutton
JP10 Self-test
jumper
TB3
NO
NC
C
D11 Alarm
LED (red)
NO
NC
C
Wiring
5. Perform Relay Connections (refer to Figure 5A for
TDF/TDL or Figure 5B for TSF/TSL electronics).
P1 Set
TP1
1
L1
(+)
L2/N
(–)
6. Dress wiring to guard against interference or contact
with cover or circuit board components.
JP2
Power on
Delay Jumper
7. Prevent moisture seepage into housing by installing an
approved seal-drain fitting in the conduit run leading to
the unit.
TP2
TB1
6
D5 Power
LED (yellow)
P2 Time Delay
TB2
8. Set fail-safe jumper as described below.
9. Installation is complete. Replace housing cover.
Caution:
P3
Allignment Pot
In hazardous areas, do not power the unit until the
conduit is sealed and enclosure cover is screwed
down securely.
Figure 5B
TSF/TSL Electronics
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4
2.6.1 Relay Connections
Relay Connections and Maximum Ratings
Model
Relay Type
Terminal Block
TDF/TDL
SPDT
TB1
Maximum ratings
10 amp at 120 - 250 VAC
8 amp at 30 VDC
0.5 amp at 125 VDC
TSF/TSL
DPDT
TB4
10 amp at 120-250 VDC
8 amp at 28 VAC
0.5 amp at 125 VDC
Hermetically sealed
TB4
DPDT
5 amp at 120-250 VDC
5 amp at 28 VAC
The switch may be configured so that the relay either energizes or de-energizes when the set
point is reached. Locating the fail-safe jumper (JP1) in the L position places the switch in a low
level failsafe (LLFS) position. This causes the relay to energize when the set point is exceeded.
Locating the fail-safe jumper (JP1) in the H position places the switch in a high level fail-safe
(HLFS) position. This causes the relay to de-energize when the set point is exceeded.
Refer to the following chart.
Power
On
On
Fail
Fail
5
Flow Level
High
Low
High
Low
Fail-Safe Position
Relay Coil
Relay Terminal
NC to CO
NO to CO
HLFS
De-energized
Closed
Open
LLFS
Energized
Open
Closed
HLFS
Energized
Open
Closed
LLFS
De-energized
Closed
Open
HLFS
De-energized
Closed
Open
LLFS
De-Energized
Closed
Open
HLFS
De-Energized
Closed
Open
LLFS
De-energized
Closed
Open
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
2.6.2 Chart Notes and Definitions
A. Equipment controlled by Thermatel relay is assumed to be
powered from one source, while the Thermatel unit itself
is assumed to be powered from a different source.
B. “Fail” means a loss of power to the Thermatel unit.
C. HLFS (High Level Fail-safe) means a flow rate or level
which is equal to or above the adjusted set point.
D. LLFS (Low Level Fail-safe) means a flow rate or level
which is less than the adjusted set point.
E. When the relay coil is de-energized, a connection is made
between the terminals CO (common) and NC (normally
closed), and there is no connection between CO and NO
(normally open).
F. When the relay coil is energized, a connection is made
between the terminals CO and NO, and there is no connection between CO and NC.
1
G. TDF/TDL – The red LED, D10, glows when the relay is
energized.
H. TSF/TSL – The red LED, D15, glows when the relay is
energized. The alarm LED (D11) glows when a high flow
or high level condition exists.
6
2.6.3 Remote Electronics Wiring
In remote electronics applications, the sensor and electronic circuit board are contained in separate housings.
The sensor housing includes a 7-position terminal block
for connecting a shielded 6-conductor cable. The cable's
six conductors are connected to terminals 1 through 6 in
the sensor housing. The cable shield is connected to the
seventh terminal (Ground). Refer to Figure 6.
1 white
2 black
3 red
4 green
5 orange
6 blue
shield
Remote electronics is recommended if the process temperature is greater than +250° F (+121° C) or when access to
the electronics is limited.
The cable is routed to the electronic circuit board and
connected to the green, 6-position terminal block (TB2).
The cable's six conductors are connected to terminals 1
through 6. The cable shield should be connected to the
green ground screw in the electronics housing base.
Figure 6
Note: The six conductors must be wired so that each terminal on
the sensor terminal block TB2 (see Figure 5) is connected to
its corresponding terminal on the electronic circuit board.
Failure to do so will cause improper switch operation.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
6
2.7
Operation and Calibration
Note: Calibration should be performed using the actual fluid at the
operating temperature.
Note: Potentiometer (P3) is set at the factory to handle most applications. The performance of the switch may be changed by
adjusting P3:
1. Switch does not detect flow or level or response time is
too long, turn P3 counterclockwise one turn and recalibrate;
2. Switch detects flow or level, but fails to reset for low
flow/level, turn P3 clockwise one turn and recalibrate.
2.7.1 Flow Sensing Applications
Adjustment procedure FLOW/NO FLOW
1. Rotate P2 (time delay) fully counterclockwise (zero time
delay).
2. Place JP1 (fail-safe) in the “L” position.
3. Reduce the flow rate to no flow. Allow 30 seconds for the
sensor to stabilize.
4. Slowly rotate P1 counterclockwise until the red LED
(D10 for the TDF/TDL or D11 for the TSF/TSL)
illuminates.
5. Slowly rotate P1 clockwise until the red LED (D10 or
D11) goes out.
6. Repeat steps 4 and 5 several times.
7. Slowly rotate P1 clockwise until the red LED (D10
or D11) goes out. Continue to rotate P1 clockwise
another turn.
8. Resume flow.
9. If the response time required to sense no flow is too long,
rotate P1 clockwise 1⁄4 turn.
10. If the response time required to sense flow is too long,
rotate P1 counterclockwise 1⁄4 turn.
11. Repeat steps 11 and 12 until desired response times
for flow and no flow are attained. Normal delays range
from two seconds to over fifteen seconds, depending
on the material and the flow rate.
12. If high level fail-safe operation is desired, move jumper,
JP1, to the H position as described on page 4.
7
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
Adjustment procedure VARIABLE FLOW RATE
A. Adjust flow to desired switch point:
1. Rotate P2 (delay) fully counterclockwise.
2. Place JP1 (fail-safe) in the “L” position.
3. Establish the flow rate at the desired switching point.
Allow 30 seconds for the sensor to stabilize.
4. Slowly rotate P1 counterclockwise until the red LED
(D10 for the TDF/TDL or D11 for the TSF/TSL)
illuminates.
5. Slowly rotate P1 clockwise until the red LED goes out.
6. Repeat steps 4 and 5 several times.
7. If the red LED (D10 or D11) is illuminated, very
slowly rotate P1 (set) clockwise until the red LED
(D10 or D11) goes out.
8. a. Switch on decreasing flow: The set point is now at
the actual flow rate. Increase the flow rate to normal
operating conditions (the relay will change state).
When the flow rate drops to the desired switching
level, the relay will change state.
b. Switch on increasing flow: Slowly rotate P1 (set)
clockwise until the red LED (D10 or D11) illuminates. The set point is now at the actual flow rate.
Decrease the flow to normal operating conditions
(the relay will change state). When the flow rate
increases to the desired switching level, the relay
will change state.
B. Maintain normal flow rate:
1. Rotate P2 (delay) fully counterclockwise.
2. Place JP1 (fail-safe) in the “L” position.
3. Maintain flow rate at normal operating conditions.
Allow 30 seconds for the sensor to stabilize.
4. Slowly rotate P1 counterclockwise until the red LED
(D10 or D11) illuminates.
5. Slowly rotate P1 clockwise until the red LED goes out.
6. Repeat steps 4 and 5 several times.
7. If the red LED (D10 or D11) is illuminated, very
slowly rotate P1 (set) clockwise until the red LED
(D10 or D11) goes out.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
8
8. If the flow can be reduced to the set point, follow procedure A; if it cannot be reduced, follow procedure B.
a. Switch on decreasing flow: Slowly rotate P1 (set)
counterclockwise until the red LED (D10 or D11)
illuminates. The set point is now just below the present flow rate. When the flow rate drops below the
present flow rate, the relay will change state.
b. Switch on increasing flow: Slowly rotate P1 (set)
clockwise until the red LED (D10 or D11) goes
out. The set point is now just above the present
flow rate. When the flow rate increases, the relay
will change state.
9. If high level fail-safe operation is desired, move the
jumper to the “H” position, as described on page 4.
2.7.2 Level Sensing Applications
Adjustment procedure
1. Make sure that P2 (time delay) is fully counterclockwise
(zero time delay).
2. Place JP1 (fail-safe) in the “L” position.
3. Submerge the sensor in still liquid. The liquid should have
the same properties as the liquid being detected in the tank.
If used for interface detection, put the sensor in the fluid
with the highest thermal conductivity (typically water).
4. Slowly rotate P1 (set point) counterclockwise until the red
LED (D10 on the TDF/TDL or D11 on the TSF/TSL)
illuminates.
5. Slowly rotate P1 clockwise until D10 or D11 goes out.
6. Repeat steps 4 and 5 several times.
7. Ensure that LED D10 or D11 is illuminated.
8. a. Low level alarm. Remove the sensor from the liquid.
The alarm should indicate a dry condition in approximately 5 to 15 seconds depending upon application. If
the response time to detect a dry condition is too long,
rotate P1 clockwise 1⁄2 turn and test again.
b. High level alarm. Remove the sensor from the liquid
and allow for the red LED (D10 or D11) to turn on.
Submerge the sensor in still liquid; the alarm should
indicate in approximately three seconds. If the response
time to detect liquid is too long, rotate P1 (set point)
counterclockwise 1⁄2 turn and test again.
9. If high level fail-safe operation is desired, move the jumper
to the “H” position, as described on page 4.
9
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
2.7.3 Adjust Set Point
Following is a quick guide for adjusting the set point on
Thermatel Flow/Level Switch.
Process
condition
LED status
Low flow
● off
Adjust to detect
High flow, High level
Low flow, Low level
—
OK
Low level
✲ on
—
o Turn P1 clockwise until LED is off.
High flow
● off
o Turn P1 clockwise until LED is on.
—
High level
✲ on
OK
—
NOTE: Jumper is in low level fail-safe (LLFS) position.
2.7.4 Time Delay
Adjusting P2 clockwise will increase the time delay
between reaching the set point and energizing or
de-energizing the relay. For fastest response, keep P2
in the full counterclockwise position.
2.7.5 Electronic Self-test – TSF/TSL Electronics Only
Jumper JP10 (refer to Figure 5B on page 4) permits the
self-test to be performed in either a normal high flow/level
or normal low flow/level condition. When jumper JP10 is
placed in the “L” position, the self-test will simulate a low
flow/level condition. With jumper JP10 in the “H” position, the self-test will simulate a high flow/level condition.
If the switch is used in a normally high flow/level condition, put the jumper in the “L” position; if it is normally
used in a low flow/level condition, put the jumper in the
“H” position.
With power on and all connections made, press and hold
the TEST button (S1). Refer to Figure 5B on page 4.
For remote self-test, provide contact closure to two wires
connected to TB3.
The red LED (D11), the relay LED (D15), and the relay
will change state to confirm operation of the switch.
Release TEST button (S1) or remove contact closure for
remote self-test. The switch will return to the initial
condition.
Note: For units with time delay, output activation is after delay period.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
10
2.7.6 Advanced Calibration Procedure
Measure and record the voltage between TP1 and TP2.
This voltage will change with set point and may be used
for future reference or adjustment of set point.
2.7.7 Power On Delay
The TSF/TSL switch incorporates a “Power On Delay.”
When power to the switch is first applied, there is no
temperature difference between the two sensors, causing
a high flow or high level alarm. The “Power On Delay”
forces the relay to the fail-safe condition, avoiding a false
high level or high flow condition during the warm up
period. The power on delay may be set for 12 or 50
seconds or disabled.
Jumper JP2 sets the “Power On Delay” time. Refer to
figure 5B on Page 4. With the jumper in the 12 position,
the initial power on delay will be approximately 12 seconds. With the jumper in the 0 position, the power on
delay is disabled. When the jumper is removed, the
power on delay will be approximately 50 seconds. The
operating yellow LED (D6) glows after power on delay
has timed out.
11
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
3.0
General Information
3.1
Maintenance
3.1.1 Cleaning
The probe may be cleaned by soaking, spraying solvents
or detergent and water onto the sensor tubes, or by ultrasonic cleaning.
Lime deposits may be safely removed by soaking in 20%
hydrochloric acid. Warming to +150° F is permissible to
speed this process.
For unusual cleaning problems, contact the factory and
determine the exact materials of construction and chemical compatibility before using strong acids or unusual
cleansers.
3.1.2 Probe Replacement – Integral Housing
1.
2.
3.
4.
1.
2.
3.
4.
5.
Removal of probe
Make sure the power source is turned off.
Unscrew and remove housing cover.
Loosen the screws on the six position terminal block
(TB2) to remove the four leads from the probe.
Unscrew probe from enclosure.
Installation of replacement probe
(Refer to Figure 5 on page 4.)
The probe's leads have been separated at the factory.
Connect leads from RTD #1, which are grouped and
marked, to terminal block TB2 at the numbers 3 and 6
position.
Connect the other pair of leads, which are not marked, to
terminal block TB2 at the numbers 2 and 5 position.
Replace housing cover.
Apply power.
After probe is installed, proceed to Gain adjustment.
Section 3.1.4.
3.1.3 Probe Replacement – Remote Housing
Removal of probe
1. Make sure the power source is turned off.
2. Unscrew and remove housing cover.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
12
3. Loosen the screws on the four position terminal block
(TB1) to remove the leads from the probe.
4. Unscrew probe from enclosure.
Installation of replacement probe
(Refer to Figure 6 on page 6.)
1. The probe's leads have been separated at the factory.
Connect leads from RTD #1, which are grouped and
marked, to the two terminals on TB1 closest to the sensor
label (refer to Figure 6).
2. Connect the other pair of leads, which are not marked, to
the remaining two positions on TB1.
3. Replace housing cover.
4. Apply power.
5. After probe is installed, proceed to Gain adjustment.
3.1.4 Gain Adjustment
(Refer to Figure 5 on Page 4)
This procedure will adjust the gain of the circuit board to
match the sensors in the probe. For best results, perform
this procedure at the actual operating conditions.
1. Rotate P2 (time delay) fully counterclockwise.
2. Place Jumper JP1 (fail-safe) in the “L” position.
3. Rotate the gain adjustment potentiometer P3 fully counterclockwise.
4. Turn P1 fully clockwise until clicks are heard, then turn
counterclockwise approximately ten (10) turns to obtain a
midrange adjustment.
5. Rotate gain adjustment P3 (alignment pot) clockwise until
the red LED (D10 on the TDF/TDL or D11 on the
TSF/TSL electronics) illuminates. This signifies that the
set point has been reached and the relay is energized.
6. Slowly rotate P3 counterclockwise until the red LED
(D10 or D11) goes out.
7. Slowly repeat steps 6 and 7 several times.
8. Ensure that the red LED (D10 or D11) is on.
9. Gain adjustment of the sensor and electronics is now
complete. Proceed with the operation and calibration in
section 2.7.
Note: If P1 is rotated fully clockwise (until clicks are heard) and the
red LED (D10 or D11) does not go out, then the gain is too high.
Reduce the gain by turning P3 counterclockwise and repeat.
13
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.0
Reference Information
4.1
Specifications
Description
Supply Voltage
Specification
120 VAC, +10%, -15% 50-60 Hz
240 VAC, +10%, -15% 50-60 Hz
24 VDC, ±20%
Power Consumption
5 Watts maximum
Output Relay
TD Electronics
Gold Flash Contacts
SPDT, 10 Amp, 120 VAC, 250 VAC
8 Amp, 30 VDC, 0.5 Amp, 125 VDC
TS Electronics
Gold Flash Contacts
DPDT, 10 Amp, 120 VAC, 250 VAC
10 Amp, 28 VDC, 0.5 Amp, 125 VDC
or
Hermetically Sealed DPDT
5 Amp, 120 VAC, 250 VAC
5 amp, 28 VDC
Operating temperature
Electronics
-40° F to +160° F (-40° C to +71° C)
Operating temperature ➀
Sensor
-100° F to +392° F (-73° C to +200° C)
High temperature design
-100° F to +850° F (-73° C to +454° C)
Response Type
1 to 10 seconds (typical - liquid)
Set Point Range–Flow
Water: 0.01 to 5.0 fps (0.003 to 1.5 m/s)
Air: 0.1 to 500 fps (0.3 to 150 m/s)
Time Delay
0-100 seconds adjustable
Repeatability
<1% @ constant temperature
Probe Materials of Construction
Twin Tip
All wetted parts of 316L stainless steel,
Hastelloy C, or Monel
Spherical Tip/ Low Flow Body 316L stainless steel
Process Connection
Refer to part number construction
Probe Insertion Length ➁➂
2" (5 cm) minimum. Available in lengths
from 2 to 130" in 1" increments
(5 to 330 cm in 1 cm increments)
1
⁄2" NPT, 1" (2.5 cm) minimum.
Available insertion lengths from
1" to 60" (5 to 152 cm)
Cable Length
500 ft. maximum (152 meters maximum)
Shipping Weight
4.6 lbs. (w/2" probe)
➀ Remote electronics or heat extension recommended for operating temperatures
greater than +250° F (+121° C).
➁ Probes longer than 30" (76 cm) must be secured within the pipe or duct by the
customer to prevent movement of the probe. Consult factory for assistance.
➂ Consult factory for longer lengths.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
14
4.1
Specifications (cont.)
DIMENSIONAL SPECIFICATIONS INCHES (MM)
5.25
(133)
Rotation clearance
NEMA 4X/7/9: 3.44 (87)
3/4" NPT
Conduit
connection
6.95
(177)
3.87
(98)
9.18
(233)
9.25
(235)
NPT Process
connection
1.57
(44)
1.57
(44)
BSP Thread
Insertion
length*
NPT
Insertion
length*
1" NPT
Conduit
connection
1" NPT
Conduit
connection
NPT
Insertion
length*
.87 (22) Dia.
2.18
(55)
NPT Process
connection
Welded
flange
process
connection
BSP Thread
Insertion
length*
.87 (22) Dia.
Insertion
length
.87 (22) Dia.
Figure 10
Figure 11
Figure 12
NEMA 4X/7/9 Group C, D, E, F, & G,
Cast Aluminum or
Stainless Steel Housing
NEMA 4X/7/9 Group B,
Polymer Coated Cast Iron Housing
Housing Code J
NEMA 4X/7/9 Group B,
Cast Aluminum Housing
Housing Code R
3.44 (87)
NEMA 4X/7/9
7.75 (197)
3/4" NPT
Conduit connection
2 Holes
.38 (10) dia.
2.37
(60)
2.00
(51)
3.00
(76)
2.00
(51)
3.50
(89)
15
2 Holes
.38 (10) dia.
3.75
(95)
1/2"
3/4"
NPT (std.)
NPT (opt.)
Transducer/Amplifier
cable connector
2.37
(60)
Optional mounting
bracket
1/4" or 1/2"
NPT or BSP
3.00
(76)
3.50
(89)
3.75
(95)
1.25
(32)
Side view
2.0 (51)
Front view
Figure 13
Figure 14
Remote Electronics Housing
Low Flow Body
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.1
Specifications (cont.)
DIMENSIONAL SPECIFICATIONS INCHES (MM)
4.63
(118) Dia.
3.00 (76)
Rotation
clearance
2.75
(70)
8.00
(203)
Insertion
length ➁
Insertion
length ➀
3/4"
NPT
Conduit
connection
10.75
(273)
.87
(22) Dia.
.62
(16) Dia.
Insertion
length ➂
Figure 17
Figure 15
Figure 16
Remote Sensor Housing
Spherical Tip Probe
1
⁄2" NPT Probe
➀ Insertion length: 2" to
130" in 1" increments (5
to 330 cm in 1 cm increments). Consult factory
for longer lengths.
➁ Insertion length:
1" (2.5 cm) minimum; 2"
to 60" (5 to 152 cm)
available.
Figure 18
High Temperature Probe
with 8" heat extension
➂ Insertion length:
2" to 36" (5 to 91 cm)
Pressure/Temperature Rating
Tip Style
Insertion Length
2" (5 cm)
3–130" (6–330 cm)
Spherical
2–130" (5-330 cm)
1" (2.5 cm)
Twin w/ 1⁄2" NPT
process connection 2–60" (5–152 cm)
Low flow body
—
High temperature
2–36" (5–90 cm)
Twin
Pressure/Temperature Rating
+100° F (+38° C) +392° F (+200° C) +850° F (+450° C)
3000
1250
600
3000
1850
5800
6000
psig
psig
psig
psig
psig
psig
psig
(206 bar)
(86 bar)
(41 bar)
(206 bar)
(127 bar)
(400 bar)
(413 bar)
2280
1140
415
2280
1680
4100
4280
psig
psig
psig
psig
psig
psig
psig
(157 bar)
—
(78 bar)
—
(28 bar)
—
(157 bar)
—
(115 bar)
—
(285 bar)
—
(295 bar) 3380 psig (233 bar)
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
16
4.2
Troubleshooting
Is the unit getting supply voltage?
Is the yellow power LED lit?
NO
YES
Does the red LED (D10 or D11)
and relay change state?
NO
YES
NO
Are results within
specified range?
YES
Does the unit respond to flow or
level change?
NO
Check voltage at terminal strip.
Check fuse.
Turn time delay (P2) fully counterclockwise. Move fail-safe jumper
to opposite position.
Replace PC board.
With an ohmmeter set at 200 ohm scale, check
resistance on TB2 between terminals:
2 and 5 = 90–180 ohms (275 ohms for High Temperature probe)
3 and 6 = 90–180 ohms (275 ohms for High Temperature probe)
1 and 2 = 0–12 ohms
3 and 4 = 0–12 ohms
5 and 6 = 0–12 ohms
Replace sensor.
Recalibrate the unit (refer to
Operation and Calibration
section on page 5).
Does sensor extend
at least 10% into flow?
NO
Replace with properly
sized sensor.
YES
YES
Adjust gain, refer to Gain
Adjustment procedure,
section 3.1.4, and recalibrate.
Test complete.
4.3
Agency Approvals
4.3.1 FM (Factory Mutual) ➀
AGENCY
MODEL APPROVED
APPROVAL CATEGORY
TXX-XXX0-E00
Explosion Proof
APPROVAL CLASSES
Class I, Div 1; Groups C, D
Class II & III, Div 1; Groups E, F, G
TXX-XXX0-Y00
Nema Type 4X and IP65
TXX-XX00-J00
Explosion Proof
Class I, Div 1; Groups B, C, D
Class II & III, Div 1; Groups E, F, G
TXX-XXX0-R00
NEMA Type 4X and IP 65
TXX-XXX0-E00
Non-Incendive
Class I, Div 2; Groups A, B, C, D
TXX-XXX0-R00
Class II & III, Div 2; Groups E, F, G T4A
TXX-XXX0-J00
NEMA Type 4X and IP 65
TXX-XXX0-Y00
PROBE MODEL ➁
Explosion Proof
XTX-XXXX-XXX
Class I, Div 1; Groups B, C, D
XT9-XXXX-X00
Class II & III, Div 1; Groups E, F, G ➁
NEMA Type 4X and IP 65
17
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.3
Agency Approvals
4.3.2 CSA (Canadian Standards Association) ➀
AGENCY
MODEL APPROVED
TXX-XXX0-E00
APPROVAL CATEGORY
Explosion Proof
APPROVAL CLASSES
Class I, Div 1; Groups C, D
Class II & III, Div 1; Groups E, F, G T4A
TXX-XXX0-Y00
Type 4X
TXX-XX00-J00
Explosion Proof
Class I, Div 1; Groups B, C, D ➂
Class II & III, Div 1; Groups E, F, G T4A
TXX-XX00-R00
Type 4X
TXX-XXX0-E00
Suitable for
Class I, Div 2; Groups A, B, C, D
TXX-XXX0-R00
Class II & III, Div 2; Groups E, F, G T4A
TXX-XXX0-J00
Type 4X
TXX-XXX0-Y00
PROBE MODEL ➁
Explosion Proof
Class I, Div 1; Groups B, C, D ➁
XTX-XXXX-XXX
Class II & III, Div 1; Groups E, F, G
XT9-XXXX-X00
Type 4X
4.3.3 CENELEC (Comité Européen de Normalisation Electotechnique) ➃
AGENCY
MODEL APPROVED
TXX-XXX0-U00
APPROVAL CATEGORY
Explosion Proof
TXX-XXX0-V00
APPROVAL CLASSES
EEx d II C T5 (-20 C° to +90° C)
T4 (-40 C° to +55° C)
TXX-XXX0-W00
4.3.4 SAA
MODEL APPROVED
TDF-1100-E00
APPROVAL CATEGORY
Explosion Proof
APPROVAL CLASSES
Ex d IIC (Hydrogen Only) T6 IP65
TDF-1120-E00
➀ FM/CSA approved based on a maximum temperature rise of
sensor of 180° F (100° C) above the process temperature.
These units have been tested to EN 50081-2
and EN 50082-2 and are in compliance with
the EMC Directive 89/336/EEC.
➁ Probe type XT1-XXX0-XXX limited to Class I Locations only.
Class II, Groups E, F & G approval only with spherical tip
(XT2-XXX0-XXX)
➂ CSA approval for Group B with integral electronics only.
➃ Other CENELEC approved model available.
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
18
4.3.5 Explosion Proof
4.4
Parts
8
2
10
4
9
11
5
7
3
1
6
12 13
14
Front view
19
Side view
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.4.2 Replacement Parts
Item
Description
1
Base NEMA 4X/7/9
2
Cover, NEMA 4X/7/9
3
O-Ring, NEMA 4X/7/9
4
Main PC Board Integral Sensor
120 VAC
240 VAC
24 VDC
Main PC Board Remote Electronics
120 VAC
240 VAC
24 VDC
Main PC Board, Integral Electronics
120 VAC
240 VAC
24 VDC
Main PC Board, Remote Electronics
120 VAC
240 VAC
24 VDC
Bracket Kit
Remote Mounting Bracket
1
⁄2" NPT Conduit Connection
3
⁄4" NPT Conduit Connection
Remote Sensor Housing Base
Remote Sensor Housing Cover
Remote Sensor Housing O-Ring
Remote Sensor PC Board
Remote Sensor Bracket Kit
Standard Probe
316L Stainless Steel
Hastelloy C
Monel
High Temperature Probe
316L Stainless Steel
Hastelloy C
Low Flow Body
5
6
7
8
9
10
11
12*
13*
14
Part Number
004-9182-003
002-6204-600
012-2101-345
TDF/TDL with 10
amp SPDT relay
Z30-3536-002
Z30-3536-004
Z30-3536-006
TSF/TSL with 10
amp DPDT relay
Z30-3572-001
Z30-3572-003
Z30-3572-005
Z30-3536-003
Z30-3536-005
Z30-3536-007
Z30-3572-002
Z30-3572-004
Z30-3572-006
TSF/TSL with 5
amp Hermetic
Sealed relay
Z30-3571-001
Z30-3571-003
Z30-3571-005
Z30-3571-002
Z30-3571-004
Z30-3571-006
089-5212-001
036-3805-001
036-3805-003
004-9104-001
004-9105-001
012-2101-345
Z30-3540-001
089-5212-002
XTX-X220-XXX
XTX-XHC0-XXX
XTX-XMM0-XXX
XTH-XXS0-XXX
XTH-XXH0-XXX
XT9-X22X-XXX
*XXX = Insertion length in inches or centimeters
Example:
4T1-1220-012 has a 12 inch insertion length;
6T1-1220-012 has a 12 cm insertion length
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
20
4.5
Model Numbers
4.5.1 Electronics Models
BASIC MODEL NUMBER
D
Standard (TD) SPDT Relay
S
On-demand electronic self-test (TS) DPDT relay
APPLICATION
F
Flow
L
Level
OUTPUT
1
10 Amp SPDT relay w/gold flashed contacts (Model TD)
2
10 Amp DPDT relay w/gold flashed contacts (Model TS)
4
5 Amp hermetically sealed DPDT relay w/gold flashed contacts (Model TS)
INPUT VOLTAGE
0
120 VAC
1
240 VAC
2
24 VDC
MOUNTING
0
Integral
2
Remote (includes electronics housing bracket and remote sensor housing)
HOUSING
E
NEMA 4X/7/9
Polymer coated aluminum dual
conduit connection, 3⁄4" NPT
J
R
NEMA 4X/7/9
Polymer coated cast iron (integral only)
Group B
Single conduit connection, 1" NPT
NEMA 4X/7/9
Polymer coated die-cast aluminum
Group B
U
CENELEC *
V
CENELEC *
Y
NEMA 4X/7/9
W
CENELEC *
dual conduit connection, 1" NPT
Polymer coated aluminum
dual cable entry, PG 13.5
Polymer coated aluminum
dual cable entry, 3⁄4" NPT
316 stainless steel, single conduit
connection, 3⁄4" NPT
Polymer coated aluminum,
dual cable entry, M 20 X 1.5
*additional CENELEC approved housings available; consult factory.
T
21
0
0
0
complete order code for
Thermatel Electronics
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.5
Model Numbers
4.5.2 Probe Models
PROBE DESIGN
4
Probe length in inches
6
Probe length in centimeters
TIP STYLE
1
Twin tip
2
Spherical tip – available in 316L stainless steel only (code 22)
PROCESS CONNECTION*
1
3
⁄4" NPT
2
1" NPT
3
11⁄2" sanitary flange
4
2" sanitary flange
A
1
B
1" 150#
C
11⁄2" 150#
D
2" 150#
E
1" 300#
Raised faced flange
F
1 ⁄2" 300#
socket welded to probe
G
2" 300#
⁄2" NPT – Twin tip, stainless steel only
1
H
1" 600#
J
11⁄2" 600#
K
2" 600#
* DIN flange process connections
available – consult factory
MATERIAL
22
316L stainless steel
HC
Hastelloy C-276
MM
Monel
Construction to meet NACE Std. MR0175 is
also available; consult factory.
INSERTION LENGTH with PROBE DESIGN code 4
001
1" min. (1⁄2" NPT connection only)
002
2" min. (ESP with 3⁄4" NPT connection only)
*
3" to 130" max. in 1" increments
* Example: 4 inches = Code 004.
For lengths over 130 inches, consult factory.
INSERTION LENGTH with PROBE DESIGN code 6
003
2.5 cm min. (1⁄2" NPT connection only)
005
5 cm min. (ESP with 3⁄4" NPT connection only)
*
6 to 330 cm max., 1 cm increments
* Example: 25 cm = Code 025.
For lengths over 330 cm, consult factory.
T
0
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
complete order code for
Thermatel Probe
22
4.5
Model Numbers
4.5.3 High Temperature Probe* Models
High temperature probe includes 8" (20 cm) heat extension
PROBE DESIGN
4
Probe length in inches
6
Probe length in centimeters
PROCESS CONNECTION*
11
3
⁄4" NPT
21
1" NPT
23
1" 150#
24
1" 300#
25
1" 600#
26
1" 1500#
33
11⁄2" 150#
34
11⁄2" 300#
Raised faced flange
35
11⁄2" 600#
socket welded to probe
36
11⁄2" 1500#
37
11⁄2" 2500#
43
2" 150#
44
2" 300#
45
2" 600#
46
2" 1500#
47
2" 2500#
* DIN flange process connections
available – consult factory
MATERIAL
S
316L stainless steel
H
Hastelloy C-276
INSERTION LENGTH with PROBE DESIGN code 4 or 5
002
to
036
2" to 36" max. in 1" increments
Example: 4 inches = Code 004
INSERTION LENGTH with PROBE DESIGN code 6 or 7
T
23
H
0
005
5 cm minimum
007
to
091
7 cm to 91 cm max. in 1 cm increments
Example: 8 cm = Code 008
complete order code for
Thermatel High temperature probe
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
4.5
Model Numbers
4.5.4 Low Flow Body Models
LOW FLOW DESIGN
4
Standard
FLOW BODY CODE
C
1
D
1
⁄4"
⁄2"
PROCESS CONNECTION
1
NPT
2
BSP
MOUNTING BRACELET
T
9
2
2
0
None
1
Provided
0
0
complete order code for
Thermatel Low flow body
4.5.5 Connecting Cable Models
CONNECTING CABLE IN FEET
Cable length in feet; 10 feet minimum, 500 feet maximum length
Example: 12 feet = Code 012
0
3
7
3
1
8
6
complete order code for
Thermatel Connecting cable
CONNECTING CABLE IN METERS
3 meters minimum, 152 meters maximum length
Example: 3 meters = Code 003
0
3
7
3
1
9
8
Thermatel Model TDF/TDL and TSF/TSL Thermal Dispersion Flow/Level Switch, 54-601
complete order code for
Thermatel Connecting cable
24
ASSURED QUALITY & SERVICE COST LESS
Service Policy
Return Material Procedure
Owners of Magnetrol/STI controls may request the
return of a control or any part of a control for complete
rebuilding or replacement. They will be rebuilt or replaced
promptly. Controls returned under our service policy
must be returned by Prepaid transportation.
Magnetrol/STI will repair or replace the control at no cost
to the purchaser (or owner) other than transportation if:
So that we may efficiently process any materials that are
returned, it is essential that a “Return Material
Authorization” (RMA) number be obtained from the
factory, prior to the material's return. This is available
through Magnetrol/STI's local representative or by
contacting the factory. Please supply the following
information:
1. Returned within the warranty period; and
2. The factory inspection finds the cause of the claim to
be covered under the warranty.
If the trouble is the result of conditions beyond our
control; or, is NOT covered by the warranty, there will be
charges for labor and the parts required to rebuild or
replace the equipment.
In some cases it may be expedient to ship replacement
parts; or, in extreme cases a complete new control, to
replace the original equipment before it is returned. If this
is desired, notify the factory of both the model and serial
numbers of the control to be replaced. In such cases, credit
for the materials returned will be determined on the basis
of the applicability of our warranty.
No claims for misapplication, labor, direct or consequential damage will be allowed.
1.
2.
3.
4.
5.
Company Name
Description of Material
Serial Number
Reason for Return
Application
Any unit that was used in a process must be properly
cleaned in accordance with OSHA standards, before it is
returned to the factory.
A Material Safety Data Sheet (MSDS) must accompany
material that was used in any media.
All shipments returned to the factory must be by prepaid
transportation.
All replacements will be shipped F.O.B. factory.
NOTE: See Electrostatic Discharge Handling
Procedure on page 3.
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93
Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4028 • Fax 630-969-9489 • www.sticontrols.com
Copyright © 2003 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
Magnetrol and Magnetrol logotype are registered trademarks of Magnetrol International.
STI and STI logotype are registered trademarks of Magnetrol International.
Performance specifications are effective with date of issue and are subject to change without notice.
The brand and product names contained within this document are trademarks or registered trademarks of their respective holders.
BULLETIN: 54-601.14
EFFECTIVE: February 2003
SUPERSEDES: May 2002