Bacharach H25-IR - Manual (Page 47)

H25-IR Operation
Instruction 3015-4342 41
IMPORTANT! Be sure to enter the leak rate using the same units of measure as displayed on the LEAK RATE
screen. In this example, the units of measure is g/yr. If your leak source is marked in Oz/yr, then multiply that
value by a factor of 28.35. For example: If the leak source is marked 0.9 Oz/yr, then enter a leak rate of (0.9 x
28.35=) 25.5 g/yr.
5.2.3 Leak Gas
The Leak Gas setting is set to match the gas contained in the internal leak source as indicated on the tag
attached to the leak source. Use the Up and Down buttons to highlight the correct gas, and then press ENT to
select that gas.
5.2.4 Leak Temp
The Leak Temperature value is set to match the temperature of the internal leak source at its time of
manufacture as indicated on the tag attached to the leak source. Use the Left and Right buttons to move the
blinking 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 Leak Temp value.
5.2.5 Leak TEMPCO
The Leak Temperature Coefficient value is set to match the temperature coefficient of the internal leak source
as indicated on the tag attached to the leak source. Use the Left and Right buttons to move the blinking 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 Leak Temperature Coefficient value.
TIP: To convert a temperature coefficient from % /
o
F to %
o
C, multiply the
o
F value by a factor of 1.8. For
example: 0.3%/
o
F x 1.8 = 0.54%/
o
C.
5.2.6 Sensor Cal
The Sensor Calibration function allows the service technician to manually calibrate the instrument’s Pressure,
Flow Rate, and Box Temperature sensors. Use the Up and Down buttons to highlight the sensor to be
calibrated, and then press ENT to display that sensor’s calibration screen.
5.2.6.1 Pressure Sensor Calibration Screen
Calibrate the pressure sensor by first measuring the ambient atmospheric pressure using an appropriate
pressure measurement device calibrated to read PSIA. Next, adjust the value displayed on the Pressure
Sensor Calibration screen to match the measured pressure reading by using the Left and Right buttons to
LEAK GAS < R134A
R401A
R402A
< R402B
LEAK TEMP 0 2 3 .9degC
LEAK TEMPCO 0 .54
%/degC
PRESSURE
FLOW RATE
BOX TEMP
E N T E R A M B I E N T P S I A
1
4 . 1 8
CURRENT OFFSET=0.00