8
User Manual EE872 Modular Probe for CO
2
, RH, T and p
4 Installation
Best measurement performance is achieved when the entire probe is located inside the environment to
be monitored. This is the case, for example, when the EE872 is fixed onto a wall with the
mounting clip
HA010227
(not included in the scope of supply, see data sheet “Accessories”), or freely hangs from the
ceiling on the connection cable.
The probe can be installed also into a partition wall using the stainless steel
mounting flange
HA010226
(not included in the scope of supply, see data sheet “Accessories”).
For large temperature difference between the two sides of the wall, T gradients may appear along the
probe. Although the CO
2
measurement is T compensated, these gradients have a great impact on the
RH and T accuracy in the M13 model. Therefore, it is of paramount importance to minimize the tempe-
rature gradients. The part of the probe standing out of the wall on the connection side shall be as small
as possible and well thermally insulated.
For best RH and T accuracy, model M13 shall be installed horizontally or with the filter cap positioned
downwards.
EE872 with mounting clip
HA010227
EE872 with mounting flange
HA010226
For outdoor applications the EE872 must be used with the radiation shield HA010510 (not included in
the scope of supply, see data sheet “Accessories”), which protects the device against rain, snow, ice
and solar radiation.
5 Setup and Adjustment
The EE872 is ready to use and does not require any configuration by the user. The factory setup of
EE872 corresponds to the type number ordered. Please see chapter 3.1 for a model overview and the
data sheet at
. The user can change the factory setup by using the Modbus
configuration adapter (order code HA011018) and the EE-PCS Product Configuration Software.
One can change the CO
2
output signal type (analogue to digital and vice versa), the analogue output
scaling and the digital settings. For p measurement, an offset correction is possible. The CO
2
, RH and T
measurement is offset and 2-point adjustable.
In addition, it is possible to enable or disable the pressure compensation (factory setting: enabled), the
sensing module heating (factory setting according to the model ordered) and the NAMUR error indication
(factory setting: disabled).
Please note:
The EE872 may not be connected to any additional power supply when using the Modbus
configuration adapter HA011018.
PC
Fig. 4 Modbus configuration adapter HA011018
