Vaisala GM70 - Manual (Page 20)

USER'S GUIDE ______________________________________________________
20 _____________________________________________________ M010139EN-G
CAUTION Handle the probe carefully. Strong impact or falling can damage the
probe.
If you need to disconnect the probe, first press POWER ON/OFF button to
turn the indicator OFF. This ensures that all settings and data are saved
properly.
Taking Measurements (Pump Aspirated
Sampling With GM70PUMP)
See Chapter 3 Preparations Before Use on page 17 if you start the GM70
for the first time, otherwise follow the instructions below:
1. Connect one end of the sampling tube to the gas inlet (marked with
IN), in case of using a tube.
2. Connect the black cable of the GM70PUMP to the MI70 indicator's
connector port.
3. Plug in the recharger connector of the MI70 and connect the
recharger to wall socket.
4. Connect the GM220 probe to the probe connector of the
GM70PUMP.
5. Insert the probe in the measuring chamber. Note that to have a tight
installation, the two O-rings on the opening of the measuring
chamber should not match together with the filter edge or the tapes
on the probe (see Figure 2 on page 21). When operating the pump,
especially when taking a sample from hot and humid conditions
into room temperature, take care that no condensation forms on the
probe.
6. Install the other end of the sampling tube to the sampling location.
7. Turn on the MI70 indicator by pressing the button.
8. Turn on the GM70PUMP.
9. The basic display opens.
10. Wait for a few minutes to get a stabilized reading. For the most
accurate readings wait for 15 minutes to reach the full operating
state of the GM70.