![Nextron MASTERTRACE Скачать руководство пользователя страница 12](http://html.mh-extra.com/html/nextron/mastertrace/mastertrace_operating-manual_1684399012.webp)
MASTER
TRACE
2.5
Chapter 2
Getting Started
All measured values displayed would be for heater 1-1. If
you want to look at heater 1-2, press the [VALUE
×
] key to
select heater 1-2 then press [STORE]. All measured values
will now be for this heater. Press [MESSAGE
Ø
] to display
the first measured value. Continue examining each value of
interest by pressing the [MESSAGE
Ø
] key and referring to
Chapter 5
: OPERATION and
Appendix B
.
2.5.1 Heater Temperature: Press the [MEASURED] key once
to get the first actual value and then [MESSAGE
Ø
] to dis-
play:
SELECT HTR: 1-1
HEAVY OIL LINE
HEATER CONTROL
TEMP: 50 °C
This is the actual temperature measured by the RTD tem-
perature probe connected to the control. It represents the
temperature at only one point on the pipe. The RTD probe
will normally be placed at a location that best represents the
average pipe temperature. However, fluid temperature will
vary somewhat along the pipe. If no RTD sensor is con-
nected or a lead is broken the value “OPEN RTD” will ap-
pear. This is an alarm condition.
When the temperature falls below the heater setpoint, 50°C
in our example, Master
Trace™
will switch on to supply
power to the heater. It stays on until the temperature rises
above the heater setpoint (50°C). Once the system has been
running for a few hours the heater temperature should be at,
or above, this setpoint value.
If hot fluid is being pumped through the pipe, the measured
temperature may be much higher than the setpoint tempera-
ture. But in this case no power should be supplied to the
heater as indicated by the front panel HEATER ON indica-
tor being off.
If the heater temperature is less than the minimum display
value (-50°C/-58°F) the word “RTD SHORT” appears. If the
temperature is over the maximum value (+ 500°C / 932°F),
the maximum value ( i.e. 500°C ) will be shown. If an abnor-
mal value appears, particularly on a new installation, check
that the correct RTD sensor type has been installed (100
OHM platinum DIN 43760) and that the three RTD wires are
wired to the correct terminals.
2.5.2 Actual Current: Press [MESSAGE
Ø
] from the heater
temperature message (or the [MEASURED] key then [MES-
SAGE
Ø
] several times) to display:
HEATER CURRENT
5.5 A
This value is the actual measured current of the heater.
Resolution is to 0.5 amp over a range of 0.0 to 100.0 amps.
Above 100.0 amps the value displayed reads O.L. (Over-
load).
With MI (Mineral Insulated) cable used in this example it
will either be 0.0 if the heater is not energized or a fairly
constant current such as 5.0 amps.
2.5.3 Ground Fault Current: A small current will always flow
to ground due to capacitance effects and leakage. Press the
[MESSAGE
Ø
] key from the heater voltage message (or
[MEASURED] then [MESSAGE
Ø
] several times) to dis-
play:
GROUND FAULT
CURRENT: 15 mA
In this example, any value above 20mA would cause an
alarm and if a ground fault current above 30mA were de-
tected, Master
Trace™
would remove power to the heater.
If the heater is off, the value displayed would be “0”. For
values over 15 mA, check the system for insulation leakage
problems.
All actual values have now been checked.
2.5.4 Statistical Data: In addition to actual values that are
present, such as current and temperature, Master
Trace™
continuously gathers and computes historic information
about the heat tracing system to determine cost of opera-
tion, utilization, trends etc. This can be quite useful in spot-
ting potential problems or in designing similar systems for
other applications. Information is stored for the last 24 hours
to give an idea of current usage.
Pressing the [MESSAGE
Ø
] key from the measured value
messages just displayed will take you to the statistics val-
ues group. A short-cut is to press the [MEASURED] key
twice to display the first message in this group. Either way
displays a brief message to indicate the start of the statis-
tics page followed by the first value message:
MEASURED:
STATISTICS
Since this is a new installation any random data should be
cleared. Press [MESSAGE
Ø
] in this group until the mes-
sage appears:
Содержание MASTERTRACE
Страница 1: ...MASTERTRACE TM OPERATOR S MANUAL HEAT TRACING CONTROL ...
Страница 51: ...MASTERTRACE 5 15 Chapter 5 Operation Figure 5 13 MR100 for Windows CE Group Interface Module RearView ...
Страница 54: ...MASTERTRACE Chapter 7 Networking Modules 7 2 Figure 7 1 MASTERTRACE System Network ...
Страница 87: ...D 2 MASTERTRACE Appendix D Typical Wiring Diagrams MS 2DXH0 MS 2DIN2 MS 5ADXH0 ...
Страница 88: ...MASTERTRACE D 3 Appendix D Typical Wiring Diagrams MS 5ADIN2 MS 5ATXH0 ...
Страница 89: ...D 4 MASTERTRACE Appendix D Typical Wiring Diagrams MS 10ADIN2 MS 10ADXH0 ...
Страница 90: ...MASTERTRACE D 5 Appendix D Typical Wiring Diagrams MS 10ADIN2X MS 10ADIN2T ...
Страница 91: ...D 6 MASTERTRACE Appendix D Typical Wiring Diagrams Driving Contactors Serial Communication 1 ...
Страница 92: ...MASTERTRACE D 7 Appendix D Typical Wiring Diagrams Serial Communication 2 ...