Operation Principle; Connection Diagram - Jumo Co2 Measuring Probe Bedienungsanleitung

USER'S GUIDE
907021/850 – CO - and Temperature Transmitter for Duct Mounting
2
GENErAL
The transmitter is designed for the measurement of carbon dioxide (CO2) and temperature (T) in HVAC applications. It incorporates
a dual wavelength NDIR CO
long term stability.
The transmitter is only available with CO
CO and T active outputs (0-10V) and an additional passive T output.
2
cAUtIoN
• The transmitter shall not be exposed to extreme mechanical or thermal stress.

oPErAtIoN PrINcIPLE

Installed into a duct, a small amount of air will flow through the divided probe into
the transmitter housing, where the CO
duct. The temperature sensor is located inside the probe.
Very important
For accurate measurement the cover as well as the cable outlet – cable glad or
conduit adapter - must be tightly closed. This is essential for avoiding ingress of
air other than from the duct into the enclosure, which would falsify the measure-
ment.
The direction of the air flow in the duct shall correspond to the
direction indicated with arrows on the cover.
INStALLAtIoN
Cable gland: Use a matching wrench to install the cable gland (in the scope of supply) onto the enclosure. While doing this the
blind will knock open. Do not use other, pointed, tools to knock open the blind in order to avoid damaging the electronics inside the
enclosure.
60 ±0.3 mm
2.36 "
±0.11
Ø > 16mm
Ø > 0.63"
6mm
0.24"
Recommended mounting screws:
ST4,2x50 DIN7981C

coNNEctIoN dIAGrAM

sensor, which compensates for ageing effects, is highly insensitive to pollution and offers outstanding
2
output (0-10V or 4-20mA) or with CO
2
sensing cell is located, and back into the
2
90 mm
±0.3
3.54 "
±0.11
Ø > 13mm
Ø > 0.51"
RUBBER GASKET
and T passive outputs (0-10V or 4-20mA) or with
2
A...according to ordering guide
CONDUIT KNOCKOUT
5mm
0.2"
19mm
0.75"
FOR CABLE GLAND
M16x1,5
CO sensing cell
2
Temperature sensor