User Manual

12
Smart Infrastructure
A6V11684000_en--_b
2019-10-16
Notes
Safety: National regulations
CAUTION
National safety regulations
Failure to comply with national safety regulations may result in personal injury and property
damage.
● Observe national provisions and comply with the appropriate safety regulations.
Mounting
Mounting location
QBM3700.. air pressure sensor with I/O extension is suited for direct mounting on air ducts,
walls, or in control panels. The following points must be observed.
Detailed information on mounting is available in document A6V11841988. See Supplemental
information [➙ 11].
NOTICE
Inaccurate measurements due to wrong mounting location.
An environment subject to high pressure pulses and/or significant thermal changes can
lead to inaccurate measurements and/or zero shift.
● Avoid the these kinds of mounting locations.
● A zero shift can be corrected with the function zero point reset.
Mounting location
NOTICE
Condensation and damage to the device
If the pressure connection nipples point upwards or are at a lower level than the air duct
probes, condensation can collect inside the sensor, causing damage to the device.
● Mount QBM3700.. vertically with pressure nipples facing down.
● Mount QBM3700.. higher than the duct probes.
Connecting tubes
NOTICE
Damage to the device when mounting or removing the device.
The device can be damaged, if the system is not depressurized when mounting or
removing it.
● Depressurize the system prior to mounting or removing the sensor.
The pressure tubing for the sensor nipples are connected as following to the differential
pressure sensor: