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Test Procedures
Raychem-IM-H57548-HWATsystem-EN 16/08
Insulation Resistance test procedure
1. De-energize the circuit.
2. Disconnect the HWAT-ECO or ACS-30 controller
if installed.
3. Disconnect bus wires from terminal block.
4. Set test voltage at 0 Vdc.
5. Connect the negative (—) lead to the heating
cable metallic braid or RayClic green wire.
6. Connect the positive (+) lead to both heating cable
bus wires or RayClic black wires.
7. Turn on the megohmmeter and set the voltage
to 500 Vdc; apply the voltage for 1 minute. Meter
needle should stop moving. Rapid deflection indi-
cates a short. Record the insulation resistance
value in the Inspection Record.
8. Repeat Steps 4–7 at 1000 and 2500 Vdc.
9. Turn off the megohmmeter.
10. If the megohmmeter does not self-discharge,
discharge phase connection to ground with
a suitable grounding rod. Disconnect the
megohmmeter.
11. Repeat this test between braid and pipe.
12. Reconnect bus wires to terminal block.
13. Rec
onnect the HWAT-ECO controller.
3. Circuit length verification (capacitance test)
Connect the capacitance meter negative lead to both
bus wires and the positive lead to the braid wire. Set
the meter to the 200nF range. Multiply this reading
by the Capacitance factor for the correct heating
cable shown below to determine the total circuit
length.
Length (ft or m) = Capacitance (nF) x Capacitance
factor (ft or m/nf)
