H25-IR PRO Instruction Manual
Introduction
P/N: 3015-5678 Rev 6
5
In the
measure mode
, the probe tip is held over the leak point until the displayed value of the leak rate stabilizes. Leak rates
can be displayed in units of:
•
oz/yr
(ounces per year)
•
g/yr
(grams per year)
•
mL/s-5
(milliliters per second
´
10
-5
)
•
Pa·m
3
/s-5
(Pascal meters cubed per second
´
10
-5
)
•
ppm
(parts per million)
The measure mode can also be used to display the concentration of gas contained in a confined space with the instrument
set up in its ppm mode after first zeroing on fresh air. Measure mode automatically changes the display from a bar graph to
a digital reading.
The leak rate is measured by first capturing all the gas leaking from the component under test. Then, by accurately measuring
the flow rate of the sampling stream and the gas concentration within that stream, the leak rate can be calculated using the
equation listed below. The instrument then converts this data into the desired leak rate units of measure and displays the
leak rate on the instrument’s front panel.
𝐋𝐞𝐚𝐤 𝐑𝐚𝐭𝐞 = 𝐌𝐚𝐬𝐬 𝐅𝐥𝐨𝐰 𝐑𝐚𝐭𝐞 × 𝐆𝐚𝐬 𝐂𝐨𝐧𝐜𝐞𝐧𝐭𝐫𝐚𝐭𝐢𝐨𝐧
where:
Leak Rate
= Rate of gas leak from component under test
Mass Flow Rate
= Sample mass flow rate
Gas Concentration = Concentration of gas in the sample (ppm)
1.5.3. Operational Functions/Features
Table 1-1. H25-IR PRO Functions and Features
Feature
Description
Data Logging
A leak measurement can be logged in memory with a time/date stamp. Up to 50 leaks can be logged.
This feature is useful in testing an installation that has a maximum permissible leak rate. Logged data
can be recalled for viewing on the display. Works in Measure Mode only.
Setup Presets
There are four user-defined setups that allow the operator to quickly switch between frequently
used combinations of Gas Type, Range, Feedback Mode, Setpoint, and other custom capabilities.
Diagnostics
Extensive diagnostics keep track of several system parameters. When an error is detected, the
i
symbol along with a brief error message is shown at the top of the display, and an audible beep is
heard every 2 seconds. Pressing the
i
button on the instrument keypad takes the user to additional
information, making diagnosis simple and easy. Text descriptions of all current error conditions can
be displayed from the instrument’s Diagnostics menu.
Relay Outputs
Four SPDT relays provide control over a variety of external equipment (e.g., horns, bells, strobe
lights) that can be automatically triggered when their associated relays are energized by any one of
several different operating conditions.
Current Loop
Output
A 4
-
20 mA current loop output can be used for the connection of external monitoring equipment
(e.g., chart recorder). An RS-232 serial port can output leak rate data as ASCII text at 10 times per
second.
Summary of Contents for H25-IR PRO
Page 6: ...H25 IR PRO Instruction Manual vi P N 3015 5678 Rev 6 ...
Page 8: ...H25 IR PRO Instruction Manual viii P N 3015 5678 Rev 6 ...
Page 39: ...H25 IR PRO Instruction Manual Menu System Overview P N 3015 5678 Rev 6 29 ...
Page 109: ...H25 IR PRO Instruction Manual Maintenance P N 3015 5678 Rev 6 99 ...
Page 120: ...H25 IR PRO Instruction Manual Declaration of Conformity P N 3015 5678 Rev 6 110 ...
