Operation
H25-IR PRO Instruction Manual
38
P/N: 3015-5678 Rev 6
5.3.4. Volume Button
The H25-IR PRO can be configured to produce audible tones under the following conditions:
•
When the quantity of a sampled gas exceeds a programmed setpoint limit (a steady,
constant-frequency tone)
•
When the detected gas level increases (an audible tone whose frequency increases as
the detected level of gas increases).
The audible tones emanate from either the speaker (at the back of the H25-IR PRO unit) or from
headphones (or an amplified speaker) connected to the headphones jack on the back panel of
the unit.
The VOL button is used to access the Adjust Speaker Volume screen. From there, the volume of the audible tones can be increased
or decreased (using the Up Arrow and Down Arrow buttons). Adjust the speaker (and earphones) volume as follows.
NOTE:
An earphone plugged into the instrument’s earphone jack automatically disconnects the speaker and allows
the operator to listen to the unit’s audible tone in high-noise environments. If additional volume is required, connect
an amplified speaker to the earphone jack.
Table 5-3. Changing the Volume Setting
Step
Button
Description
Sample Screen
1
Press the VOL button to display
the Speaker Volume screen.
2
Press the Up Arrow button to
increase volume. Press the Down
Arrow button to decrease
volume. A visual indication of the
volume level is provided by a bar
graph at the bottom of the Data
Display screen.
3
Press
ENT
to save the new volume
level.
5.3.5. Range Button
In addition to display style, another option is the ability to change the range for gas readings.
This is accomplished using the RANGE button on the front panel and is useful during search
mode to better monitor larger swings in detected gas. The range feature is best illustrated
using the graphic display style of the Search Mode screen. Note that it contains a hash mark
delineating the alarm setpoint (refer to the graphic display style in Figure 5-1).
By default, the display range maximum is set to twice the alarm setpoint (e.g., 40.0 g/yr for
a 20.0 g/yr alarm setpoint). The RANGE button toggles between 2x (the default), 3x, and 4x
(that is, two times, three times, and four times the alarm setpoint setting), and then returns
to the default 2x range. These examples, shown as 3 successive presses of the RANGE
button, are illustrated in Figure 5-4.
SPEAKER VOLUME
qp
ADJUST
ESC=QUIT
Summary of Contents for H25-IR PRO
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Page 39: ...H25 IR PRO Instruction Manual Menu System Overview P N 3015 5678 Rev 6 29 ...
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