Nextron MASTERTRACE, Руководство по эксплуатации

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MASTER TRACE
2.1
Chapter 2 Getting Started
2 Getting Started
2.1 Introduction
Master
Trace™
has many features which can provide trou-
ble-free operation of heat tracing installations. To realize all
the capabilities of control, it is recommended that all sec-
tions of the instruction manual are read.
An example is presented to illustrate how Master Trace™
set up and operation on a specific installation.
Master
Trace™ is easy to program and setting up a unit to
your specific requirements should be straight forward.
In this example an MS-10A control module and ML100/
MR100 front panel display/keyboard module are mounted
in an enclosure for control of 10 heavy oil feed lines. Con-
sult
Appendix A and B for further information on a specific
message or instructions.
Important Note:
For the programming of MasterTrace™ panel with an
MS-10A control module and MR100 for Windows CE
Touch Screen remote monitoring module, the same proce-
dure outlined in this example applies. Consult Appendix
G - MR100 for Windows CE for further information.
Example: Each heater will be programmed as:
Configuration:
1) 10 point panel and local display
2) 1 RTD per heater for temperature sensing
3) Mineral insulated (MI) cable is used for the heater.
4) Normally open alarm contact to remote programmable
control
5) Solid state switching 120 Vac@20A
6) Northern climate installation outdoors.
Operating temperatures: -40° to +40 °C
NEMA-4 weatherproof enclosure.
Install and commission the control in the following order:
STEP 1: Enable heaters (Section 2.2)
STEP 2: Program setpoints (Section 2.3)
STEP 3: Test heater and alarm operation (Section 2.4)
STEP 4: Monitor system status (Section 2.5)
2.2 Enable Heaters
After each control has been programmed with it’s unique
address, it is necessary to indicate which units are con-
nected to the system and should be controlled. This is done
by enabling a heater circuit. To enable a heater circuit, the
operator must specify the heater number.
Note: When programming controls on a multipoint system
it is important that you always know which heater is being
accessed. Otherwise it is possible to program the wrong
heater control by accident.
Suppose in our example we have a 10-point controller with
heaters; 1-1, 1-2, 1-3 and 1-4 wired and programmed. The
remaining six unused heaters will be disabled and can be
used for easy system expansion at a later date.
The user can determine which heater the display is selected
to by pressing either the [SETPOINTS] key or the [MEAS-
URED] key which will cause this message to be displayed
(the 2nd line and heater number may be different):
SELECT HEATER: 1-1
NONAME
Use the [VALUE × ] or [VALUE Ø ] keys to select the appro-
priate heater number then press [STORE] to select a new
heater.
For this example, press [SETPOINT], select heater 1-1 using
[VALUE
× ] or [VALUE Ø ] keys then press [STORE].
Setpoint Required Range
Fluid maintain
temperature 50 °C 0-500°C/off
/none
Low temperature
alarm
35 °C -50 to 500°C/off
High temperature
alarm
no alarm -50 to 500°C/off
Nominal heater
current
5 amps 0.0 to 100.0A
/off
Nominal heater
voltage 115 VAC 100 to 600 Vac
Ground fault trip
current 30 mA 10 to 1000mA
/off
Ground fault alarm
current 20 mA 10 to 1000mA
/off
System exercise
time interval
8 hours 1-24/off
Cost per Kilowatt
hour
$0.06 $0.01-$0.50
Heater name HEAVY OIL
LINE
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