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H25-IR Calibration
Instruction 3015-4342 23
2. Press the front panel CAL button to display the Calibration screen. Note that the display must be
reading a leak rate of “0.00” when the CAL button is pressed; otherwise, the message “LEAK RATE
MUST BE ZERO TO CALIBRATE” will appear. If necessary, press the ZERO button to zero the display
before pressing CAL.
3. Ensure that the instrument is set up for internal calibration as indicated by “INT CAL” being displayed at
the bottom-right of the display. If “EXT CAL” (external calibration) is displayed, press the ESC key to
perform the procedure in Section 3.1 Selecting Internal or External Calibration and set the Cal Type to
Internal.
4. Insert the probe tip into the CAL Port within 10 seconds after
pressing the CAL button. Be sure that the probe tip makes
contact with the spring switch. At this time the calibration
process should automatically start.
The top number of the Calibration screen shows the “target”
value (leak source rate), while the bottom number shows the
current measured value. Keep the probe tip firmly against
the back of the port for the duration of the calibration
process, during which time the instrument is calibrated at
both a high and low flow rate.
If the probe tip looses contact with the spring switch before the
calibration process completes, the message “CAL ABORTED” is
displayed. At this time press any key to retain the previous
calibration curve and return to the Data Display screen.
5. After a successful calibration the new calibration data is saved and
the message “CAL OK” followed by “WITHDRAW PROBE FROM
LEAK SOURCE” will appear.
6. Withdrawing the probe causes the display to switch back to the
Data Display screen. Note, however, if the PCHK Mode is set to
AUTO (refer to Section 2.5.7 PCHK Mode), then a pressure check
is performed prior to the display of the Data Display screen.
NOTE: After being calibrated the instrument is automatically placed
into its Search mode.
3.3 External Calibration
External calibration uses a customer supplied leak source that matches the gas to be monitored. Properties of
the leak source must be entered by the operator using the EXT RATE and EXT GAS TYPE functions as
described in Section 3.1.2 External Calibration Selection and Setup. The EXT RATE entry is the number
displayed as the “target” value during calibration.
IMPORTANT! The operator is responsible for ensuring that the external leak-rate value has been corrected
for daily changes in ambient temperature and pressure at the time of calibration. It is also the operator’s
responsibility to ensure that a good calibration has been performed.
1. Turn ON instrument and allow it to complete its 120 second warm-up.
2. Press the front panel CAL button to display the Calibration screen. Note that the display must be
reading a leak rate of “0.00” when the CAL button is pressed; otherwise, the message “LEAK RATE
C
AL
OK
Oz/yr
R134A
SETUP
INT CAL
WITHDRAW PROBE
FROM LEAK
SOURCE
Oz/yr
R134A
SETUP
INT CAL
Oz/yr
R134A
SETUP
SM SRCH
0.00
Oz/yr
R134A
SETUP
INT CAL
TARGET
O/YR
R134A
MEASURED
O/YR
0.89
Oz/yr
R134A
SETUP
INT CAL
0.89
TARGET
O/YR
R134A
MEASURED
O/YR
INSERT
PROBE
PCHK
- Instruction 3015-4342 1
- WARRANTY 2
- Table of Contents 3
- Contents H25-IR 4
- H25-IR Contents 5
- 1 Introduction 7
- 1.2.5 Explosive Atmosphere 8
- 1.2.8 In Case of Malfunction 8
- 1.2.9 Cleaning 8
- 1.3 Ordering Information 9
- Introduction H25-IR 10
- 4 Instruction 3015-4342 10
- 1.6 Functional Overview 11
- 1.7.1 Front View 12
- 1.7.2 Rear View 13
- 1.7.3 Interior 13
- 1.7.4 Standard Probe 14
- 1.7.6 Smart Probe 15
- 1.8 Menu System 16
- 2 Preparing for Operation 17
- 2.5 System Setup 18
- 2.5.3 Relays 19
- 2.5.4 4–20 mA Loop 19
- BRIGHTNESS 20
- 2.6.1 Setup Name 21
- 2.6.2 Range 21
- 2.6.3 Gas Type 22
- 2.6.4 Feedback Mode 22
- 2.6.5 Setpoint 22
- 2.6.6 Search Auto Zero 23
- 18 Instruction 3015-4342 24
- Instruction 3015-4342 19 25
- 20 Instruction 3015-4342 26
- 3 Calibration 27
- 3.2 Internal Calibration 28
- 3.3 External Calibration 29
- 3.4 CAL Factor 30
- Using the CAL Factor 31
- K4=0.0 K5=0.0 32
- Instruction 3015-4342 27 33
- Instruction 3015-4342 34
- 4 Operation 35
- 4.2.3 Range Selection 36
- 4.2.4 Setup Selection 36
- 4.2.5 Volume Adjustment 36
- 4.2.6 Searching for a Leak 37
- 4.2.10 Logged Measurements 39
- 4.3 Fault Conditions 40
- 4.5 RS-232 Communication 41
- 4.6 Serial Output Types 41
- 5 Maintenance 43
- 5.1.2 Last Fault 44
- 5.1.3 IR Emitter 45
- 5.1.4 Pressure 45
- 5.1.5 Loop Test 45
- 5.1.6 Clear Last Fault 45
- 5.2 Factory Menu 46
- 5.2.3 Leak Gas 47
- 5.2.4 Leak Temp 47
- 5.2.5 Leak TEMPCO 47
- 5.2.6 Sensor Cal 47
- 5.2.7 Model Select 48
- 5.3 Flashing Memory 49
- Parts &Service H25-IR 50
- 44 Instruction 3015-4342 50
- H25-IR Operation 51
- 5.4 Part Replacement 52
- 5.4.2 Fuse Replacement 53
- 48 Instruction 3015-4342 54
- 5.4.5.1 Top Cover Removal 55
- 5.4.5.4 DIGIPOT Adjustment 56
- 5.4.5.5 Factory Calibration 56
- 5.5 Replacement Parts 58
- 5.6 Service Centers 59
- H25-IR Specifications 60
- 7 Specifications 66
- H25-IR Appendix A 68
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