Nextron TRACEMATE II-CTR, Руководство оператора

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TRACE MATE II-CTR Chapter 5 TESTING
5.2
Table 5.2 Resistance versus Temperature in °C
(DIN 43760 RTD)
°C R (ohms) °C R (ohms) °C R (ohms)
-40 84.27 80 130.89 200 175.84
-30 88.22 90 134.70 210 179.51
-20 92.16 100 138.50 220 183.17
-10 96.09 110 142.29 230 186.82
0 100.00 120 146.06 240 190.46
10 103.90 130 149.82 250 194.08
20 107.79 140 153.58 260 197.69
30 111.67 150 157.32 270 201.30
40 115.64 160 161.04 280 204.88
50 119.39 170 164.76 290 208.46
60 123.24 180 168.47 300 212.03
70 127.07 190 172.16
Ground Fault Testing
It is possible to simulate a ground fault on heater 1 by
creating a situation where the current from the heater 1’s
power input terminals, terminal 1 and 2, is not equal. As
shown in figure 5.2, this is done by connecting a resistor
across terminals 1 and 4.
Follow these steps to test the ground fault circuit:
1. Turn on incoming power. Set the gound fault trip
alarm setpoint to 30mA ( default ).
2. Turn off incoming power.
3. Connect a resistor between terminals 1 and 4.
This allows ground fault current I
G
to flow,
which will be seen by the ground fault sensor as
a ground fault. Size the resistor according to the
table to ensure sufficient ground fault current of
30mA ± 25%.
Heater Voltage 110 240 277 AC Volts
Resistance 2700 6200 6800 Ohms
Wattage 5 10 15 Watts
Voltage Rating 250 500 500 DC Volts
4. Apply power. The ground fault indicator should
come on after a short delay. It should not be
possible to turn on the heater even if the actual
temperature is below the setpoint. The
TraceMate II-CTR acts a ground fault circuit
breaker.
5. Turn off incoming power.
6. Remove the ground fault resistor between
terminals 1 and 4.
7. Re-apply power. All alarm indicators should be
off.
Repairs
In the event of a hardware failure, system operation can
be restored quickly by following this procedure:
1. Turn off incoming heater and alarm power.
2. Ensure that all wires are correctly marked for the
corresponding terminals.
3. Disconnect all wires to the terminals.
4. Remove any screws holding the TraceMate II-
CTR controller and return it to the factory for
repair.
5. Install a replacement TraceMate II-CTR control
module. A replacement module, without the
enclosure, can be ordered as a spare part. See the
order codes.
6. Reconnect the wires, apply power and follow the
testing procedure for a new control.