H25-IR
Preparing for Operation
Instruction 3015-5286
17
SETPOINT
– Both the bar graph and audible tone go to their maximum values when the leak rate equals or
goes above the setpoint. Enter a setpoint value per Section
2.5.5 Setpoint
.
H25C SETPOINT
– This setting emulates the operation of the H25C Industrial Halogen Leak Detector. The bar
graph and audible tone are suppressed when the leak rate is below the setpoint. They both go to their 50%
values when the leak rate reaches the setpoint, and then they both continuously increase in value as the leak
rate increases until reaching their maximum values at
2-times
the setpoint. Enter a setpoint value per
Section
2.5.5 Setpoint
.
Use the
Up
and
Down
buttons to highlight the desired function. Press
ENT
to save the selection.
2.5.5 Setpoint
The SETPOINT function establishes a leak rate at which the graphical display and audible tone are turned ON
as determined by the Feedback Mode setting (refer to the previous section).
The setpoint value also sets the leak rate at which one or more of the instrument’s relays is energized
whenever the leak rate equals, exceeds, or falls below the setpoint value (refer to Section
2.4.3 Relays
), plus it
establishes a reference point where the instrument’s auto-zero function can be turned OFF while in the Search
mode (refer to Section
2.5.6 Search Auto Zero)
.
Use the
Left
and
Right
buttons to move the cursor across the screen to highlight the digit to be modified, and
then use the
Up
and
Down
buttons to modify that digit. Press
ENT
to save the new setpoint.
2.5.6 Search Auto Zero
The SEARCH AUTO ZERO function allows the operator to select one of the following conditions when the auto-
zero function is disabled while in the Search mode.
NOTE:
This function works in conjunction with the setpoint value as entered in Section 2.5.5 Setpoint.
ALWAYS ON
– The background gas level is
always
zeroed. If the probe is held over a gas leak, the instrument
will automatically zero-out the reading.
ALWAYS OFF
– The background gas level is
never
zeroed. If the probe is held over a gas leak, the instrument
will not zero-out the reading, similar in operation to the Measure mode.
BELOW SETPOINT
– The auto-zero function is ON when the leak-rate is
below
the setpoint value. If the leak
rate goes
above
the setpoint value, then the auto-zero function turns OFF, allowing the probe to stay on the
leak without the reading being zeroed-out.
For example
: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <2 Oz/yr. If
the leak rate is
2 Oz/yr, then the auto-zero function turns OFF.
BELOW 90% OF SP
– The auto-zero function is ON when the leak-rate is
below
90% of the setpoint value. If
the leak rate goes
above
90% of the setpoint value, then the auto-zero function turns OFF, allowing the probe
to stay on the leak without the reading being zeroed-out.
For example
: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <1.8 Oz/yr.
If the leak rate is
1.8 Oz/yr, then the auto-zero function turns OFF.
SETPOINT
SETUP NO. 1
0
0
.0000 Oz/yr
SEARCH AUTO ZERO
SETUP NO.1
<
ALWAYS ON
ALWAYS
OFF
BELOW
SETPOINT
BELOW 90% OF SP
BELOW 75% OF SP
BELOW 50% OF SP
Summary of Contents for H25-IR
Page 6: ...Contents H25 IR iv Instruction 3015 5286 Notes ...
Page 26: ...Preparing for Operation H25 IR 20 Instruction 3015 5286 Notes ...
Page 34: ...Calibration H25 IR 28 Instruction 3015 5286 Notes ...
Page 43: ...H25 IR Operation Instruction 3015 5286 37 Notes ...
Page 68: ...Specifications H25 IR 62 Instruction 3015 5286 Notes ...
