NIC-TD-0000025-00
4. Measurement
- 25 -
4.3.5.
Measurement screen
Measurements include both a "Zero adjustment" and "Mercury concentration measurement"
cycle.
The display screen can be changed to Digital display/Level meter display/Time series only
when making a "Mercury concentration measurement".
During a measurement it is impossible to change the measurement mode, unit of measured
concentration, full-scale value, alarm-generating level, and current time.
Only the interfering component check button can be changed during a measurement.
(1)
Zero adjustment
The baseline (0 mg/m
3
) of the mercury concentration is automatically corrected.
The time needed for a zero adjustment is automatically changed according to the
mercury concentration measured in the preceding cycle.
～
0.100 mg/m
3
10 seconds
0.100 mg/m
3
to 0.300 mg/m
3
15 seconds
0.300 mg/m
3
to 0.600 mg/m
3
20 seconds
0.600 mg/m
3
～
25 seconds
When a measurement is made in Static mode an adjustment time (30 seconds) is
needed just once before the zero adjustment immediately after starting the
measurement.
During this time the character string "Now Adjusting" will be blinking on the display
screen.
During the zero adjustment the character string "ZERO CHECK" will be blinking on the
display screen.
<Measurement screen at the time of
adjustment>
<Measurement screen during zero
adjustment>
(2)
Mercury measurement
This is when the mercury concentration is measured.
The time of one measurement cycle depends on the measurement mode.
Normal mode
290 seconds
One Minute mode
50 seconds
Static mode
50 seconds