Dynisco IPX II Series, Operating Manual

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40
COMMISSIONING
Fig. 7-2 Fig. 7-2
Fig. 7-2 Fig. 7-2 Fig. 7-2 T
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The use of an appropriate power supply is important. A 24 V dc supply having a current
handling capacity of at least 0.1A is commonly used. Always use a dc (direct current)
supply, or suitable size battery. Nev
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er c
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II
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T TT TTrrrrran an an an ansmitt smitt smitt smitt smitter dir er dir er dir er dir er directly ectly ectly ectly ectly t t t t to 115V o 115V o 115V o 115V o 115VA A A A AC C C C C or 2 or 2 or 2 or 2 or 230V 30V 30V 30V 30VA A A A AC. C. C. C. C.
With the power supply off, connect the (+) side of the power supply to the (+) OUT terminal of the
electronics module. Connect the (-) side of the power supply through a 250
Ω
resistor to the (-) OUT
terminal of the electronics module. See Figure 7-2. Connect the input terminals 1 and 3 in series
with the current loop to be measured. Terminal 1 should be more positive than 3.
Current Input High (+MA)
Current Input Low (-COM)
The output can be monitored by connecting a multi-meter in series with either of the two output
terminals, or by connecting a high impedance voltmeter across the 250
Ω
resistor. Turn on the power
supply. In about 5 seconds the IPX II Series Smart Pressure Transmitter loop current will settle to its
normal value in the range of 4 to 20 mA.
If the unit has been ordered with optional dual LCD display, the display and display adapter must be
removed to connect the 24 V dc power to the unit. The display pulls off the display adapter, see
Figure 7-3.
There are two types of display adapters, the standard without a second 4-20mA output for
temperature or an adapter with a second 4-20 mA output for temperature. The display adapter is
connected through standoff posts by two 6-32 screws.