H25-IR
Calibration
Instruction 3015-5286
21
3 Calibration
It is recommended that a calibration be performed after the initial warm up and then once every 2-4 hours of
use thereafter. During the calibration cycle internal pressures and flow rates are stored which are used to
determine leak rate and detect proper flow. A flow fault indicates a change in pressure since the time of the last
calibration cycle. This can be due to particulate build up on the probe tip or internal filters as well as swings in
atmospheric pressure due to weather changes (if a long time has elapsed since the last calibration cycle). Most
flow faults can be cleared by simply performing a new calibration.
When the instrument is supplied with an internal leak source, the operator can choose between two types of
calibration:
Internal
or
External
. Internal calibration uses the instrument’s built-in leak source, while External
calibration uses a customer-supplied calibrated leak source.
If the instrument is supplied without a leak source, then the option of selecting the calibration type is removed
from the menu system. The only option for this model of instrument is to calibrate using an external leak source.
3.1 Selecting Internal or External Calibration
Use the Main Menu > CAL DATA > CAL TYPE function to select either Internal or External calibration. If
External calibration is selected, then also use the EXT RATE and EXT GAS TYPE functions to enter the
characteristics of the external leak source.
Display the Calibration Data menu by first pressing
both
the
ENT
and
ESC
buttons on either the instrument’s
front panel or Smart probe at the same time to display the Main menu. Next, use the
Up
and
Down
buttons to
highlight “CAL DATA”, and then press
ENT
to display the Calibration Data menu.
Main Menu:
SYSTEM
LOG
SETUPS
CAL
DATA
DIAGNOSTICS
3.1.1 Internal Calibration Selection
From the Calibration Data menu, use the
Up
and
Down
buttons to highlight “CAL TYPE”, and then press
ENT
to display its setup screen. Use the
Up
and
Down
buttons to highlight “INTERNAL”,
and press
ENT
to make the
selection and return to the Calibration Data menu. Press
ESC
as required to return to the Data Display screen.
Calibration Data Menu:
CAL TYPE
EXT
RATE
EXT
GAS
TYPE
CAL
FACTOR
CAL
INTERVAL
ENFORCE CAL INTERVAL
LAST CAL DATE
RESTORE FACTORY CAL
CAL TYPE
INTERNAL
EXTERNAL
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 ...
