WMT700 has separate power supply inputs for:
- Operating power
- Heating power
The operating power has 1 supply terminal and 1 ground terminal, while the heating power has 2 supply terminals and 2 ground terminals allowing a higher supply current. All supply ground terminals are internally connected to each other inside WMT700.
| Make sure that the power supply output voltage, current, and power specifications including the tolerance match the WMT700 specifications. |
| In a system setup with 2 separate power supplies, avoid ground potential differences between the supplies. Connect the negative terminals together if necessary. |
| Do not use a DC power supply based on a chopper circuit that operates at 100 kHz. The ripple in the DC output can distort the measurement. |
|
The sensor and the cabling must be protected with a fuse or a circuit breaker. The maximum sizes of the fuses or circuit breakers protecting the power lines:
The circuit breaker can be either 2-pole (on both positive and negative/ground) or 1-pole (positive wires). You can also replace the circuit breaker with a cartridge fuse with T (slow acting) tripping characteristics. |