Bacharach H25-IR - Manual (Page 35)

H25-IR Operation
Instruction 3015-4342 29
Gas Measurement
Leak Units
Gas Type Mode
Setup Name (first 8 characters)
Range & Mode
Graphical Display of Gas Level
4 Operation
4.1 Instrument Location
The H25-IR Refrigerant Gas Leak Detector should be placed on a flat, horizontal surface such as a bench or
table top when in use.
When searching for leaks, the instrument does not need to be in a gas-free area. This is because of the
instrument’s ability to automatically zero-out background gases and still be able to locate gas leaks.
When making leak-rate measurements, the instrument needs a location where the air is clean and free of the
gas being monitored
 this is necessary for zeroing purposes. If the area is contaminated, then a fresh-air
source (e.g., fresh air piped in from the outside) must be made available so the operator can manually zero the
instrument before making a measurement.
4.2 Using the H25-IR
4.2.1 Power
Plug the instrument into the nearest AC outlet (100 to 240 VAC, 50/60 Hz) or use the battery pack (depending
on your model number), and then set the rear panel power switch to its ON position. After power up, the
instrument requires 120 seconds to warm-up. A detailed description of the front panel display screens that are
shown during turn-on and warm-up is contained in Section 2.3 Battery Pack.
4.2.2 Initial Setup
At this time the H25-IR should already be set up as described in Section 2 Preparing for Operation.
After warming up, the instrument’s Data Display screen will show the current Gas Measurement, Leak Units,
Gas Type, Setup Name, Range, and Mode of Operation. In addition, a graphical display of the relative gas level
is provided by a bar graph at the bottom of the screen whose length increases up the screen as the gas level
increases. An audible tone may also be heard whose pitch increases in frequency as the gas level increases.
Note that the sensitivity of the bar graph and audible tone for any given gas level is dependent on the Range
setting.
When using the Smart probe, its LCD will show the current Gas Measurement, Range, Mode of Operation, and
Setup Number in parentheses. If the probe contains a red LED, the blink rate of the LED will increase as the
gas level increases. Note that the sensitivity of the LED’s blink rate for any given gas level is dependent on the
Range setting.
Instrument Display Smart Probe Display
The Leak Units can be changed per Section 2.5.2 Leak Unit; the Gas Type changed per Section 2.5.1 Gas
Type; the Setup changed by pressing the SETUP button; the Range changed by pressing the RANGE button;
and the Mode changed by pressing the MODE button. Note that if the Gas Type is changed during operation,
the Setup Name and Number changes to a dash (
), indicating that the previously selected Setup is no longer
valid.
0.00 SM
SRCH (1)
Range
(Setup No.)
Oz/yr
R134A
SETUP
SM SRCH