Wiring HMP155 - HMP155

HMP155 User Guide
Document code
M210912EN
Revision
G.1
Language
English
Product
HMP155
Document type
User guide

It is a good practice to protect the instrument cable according to low voltage electrical installations standards (IEC 60364-4-43, or equivalent standard).

Vaisala recommends protecting the power line of HMP155 probe and its cabling with a fuse or a circuit breaker, especially when the power supply can supply more than 2.5 A.

If you use Vaisala connection cables (223283, 220496, 220497, 220498), the recommended maximum sizes of the fuses and circuit breakers for protecting the power supply line are:

  • 1 A with type B (IEC/EN 60898-1) tripping characteristics and specified for at least 28 VDC operation voltage
  • 1 A cartridge fuse with T-type (IEC 60127-2) tripping characteristics and specified for at least 28 VDC operation voltage

If you use your own cables, make sure the current-carrying capacity of them adheres to the maximum fuse size.

Table 1. Vaisala cables 223283, 220496, 220497, 220498
Vaisala cables 223283, 220496, 220497, 220498
Diameter AWG 24
Conductor cross-section area 0.25 mm2
Operational temperature Up to 80 °C (176 °F)

When you use the recommended fuse or circuit breaker types, HMP155 is a limited-energy circuit according IEC 61010-1.

The current consumption of all the HMP155 probes is below 300 mA.