Vaisala HMP110REF User Manual

3.1.2 Drilling instructions for duct installation kit
Ø24
Ø3.2
42
1
2
3
mm
Figure 12 Drilling instructions
1 Mounting screw
2 Tension screw
3 Probe assembled in duct installation kit plastic pipe
1. Use a 24-mm drill bit to drill a hole to the duct wall for the humidity probe.
2. Drill holes for the duct installation kit mounting screws around the hole in a square
arrangement, 42 mm apart from each other. Use a 3.2-mm drill bit to drill the holes for the
mounting screws (four ST4.2×16-C-Z DIN 7981 screws).
3.2
Mounting HMP63 and HMP113 probes
HMP63 and HMP113 probes do not have a thread on the probe body. For a convenient
installation, use the optional installation accessories:
• Use the probe mounting clamp to hold the probe on a wall
• Use the probe mounting flange to hold the probe in a through-wall installation
• If you are using the probe with HMT120 or HMT130 transmitter, or HM40 handheld meter,
use the plastic locking bushing
Avoid placing the probe in a place where condensation can run onto the sensor.
Chapter 3 – Installation
23

Vaisala HMP110REF Specifications

General

Brand	Vaisala
Model	HMP110REF
Category	Measuring Instruments
Language	English