Agilent Flowmeter ADM1000
Operating Instructions 5
Autoranging Display
The microprocessor automatically adjusts the resolution of the
display in response to various gas flow ranges as follows:
Auto/Manual Power Off
Every time the unit is activated, a “power-off” cycle begins,
lasting 10 minutes. If the flowmeter is not used during this
time, the unit will turn off. To conserve battery power, turn off
the instrument manually by pressing and holding the on/split
button until the sign off message appears.
Figure 1 Effect of temperature and water vapor on volumetric
flow.
Flow (mL/min) Display resolution (mL/min)
0.50 - 9.99 0.01
10.0 - 99.9 0.1
100 - 1000 1.0
12
14
16
18
20
5
9
10
7
8
6
4
3
2
1
0
0 5 10 15 20 25 30 35 40
0
2
4
6
8
10
Temperature (˚C)
A
B
C
Water vapor pressure (psia)
% Increase in reading from
standard conditions
Effect of temperature and
water vapor on volumetric flow
A % increase in volumetric flow due to temperature and
water vapor pressure
B % increase in volumetric flow due to temperature only
C Water vapor pressure
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