Vaisala GM70 - Manual (Page 16)

USER'S GUIDE ______________________________________________________
16 _____________________________________________________ M010139EN-G
4 = Probe GMP221 or GMP222
5 = Probe fastener
6 = Handle GMH70
7 = Adjustment button
8 = Gas outlet
9 = ON/OFF switch
10 = Gas inlet
11 = Measuring chamber
12 = Probe GMP221 or GMP222
13 = Probe connector
14 = Connector to MI70 indicator
Probes
The GMP220 series probes can be used with the GM70. Table 2 below
presents the measuring ranges that can be can be selected for the probes.
Table 2 GMP221 and GMP222 Measuring Ranges
Probe Measuring Range
GMP221 0 ... 2%, 0 ... 3%, 0 ... 5%, 0 ... 10%, 0 ...
20% CO
2
GMP222 0 ... 2000 ppm, 0 ... 3000 ppm, 0 ... 5000
ppm, 0 ... 7000 ppm, 0 ... 10000 ppm
In order to obtain the best possible performance, it is recommended that
the measurement range is chosen so that the actual concentrations to be
measured are roughly in the middle of the measuring range.
GM70PUMP for Aspirated Sampling
GM70 aspiration pump consists of a pump and a measurement chamber
for CO
2
measurements. GM70PUMP is designed for checking of fixed
CO
2
transmitters and for sampling from locations difficult to access.
GM70PUMP is connected to a MI70 indicator which displays the
measurement result. Pump system is powered through the MI70
indicator.