Bacharach H25-IR Specifications Page 23
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H25-IR Preparing for Operation
Instruction 3015-4342 17
2.6.6 Search Auto Zero
The SEARCH AUTO ZERO function allows the operator to select one of the following conditions when the auto-
zero function is disabled while in the Search mode:
NOTE: This function works in conjunction with the setpoint value as entered in Section “2.6.5 Setpoint.”
ALWAYS ON – The background gas level is always zeroed. If the probe is held over a gas leak, the instrument
will automatically zero-out the reading.
ALWAYS OFF – The background gas level is never zeroed. If the probe is held over a gas leak, the instrument
will not zero-out the reading, similar in operation to the Measure mode.
BELOW SETPOINT – The auto-zero function is ON when the leak-rate is below the setpoint value. If the leak
rate goes above the setpoint value, then the auto-zero function turns OFF, allowing the probe to stay on the
leak without the reading being zeroed-out.
For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <2 Oz/yr. If
the leak rate is 2 Oz/yr, then the auto-zero function turns OFF.
BELOW 90% OF SP – The auto-zero function is ON when the leak-rate is below 90% of the setpoint value. If
the leak rate goes above 90% of the setpoint value, then the auto-zero function turns OFF, allowing the probe
to stay on the leak without the reading being zeroed-out.
For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <1.8 Oz/yr.
If the leak rate is 1.8 Oz/yr, then the auto-zero function turns OFF.
BELOW 75% OF SP – The auto-zero function is ON when the leak-rate is below 75% of the setpoint value. If
the leak rate goes above 75% of the setpoint value, then the auto-zero function turns OFF, allowing the probe
to stay on the leak without the reading being zeroed-out.
For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <1.5 Oz/yr.
If the leak rate is 1.5 Oz/yr, then the auto-zero function turns OFF.
BELOW 50% OF SP – The auto-zero function is ON when the leak-rate is below 50% of the setpoint value. If
the leak rate goes above 50% of the setpoint value, then the auto-zero function turns OFF, allowing the probe
to stay on the leak without the reading being zeroed-out.
For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <1 Oz/yr. If
the leak rate is 1 Oz/yr, then the auto-zero function turns OFF.
SEARCH AUTO ZERO
SETUP NO.1
< ALWAYS ON
ALWAYS OFF
BELOW SETPOINT
BELOW 90% OF SP
BELOW 75% OF SP
BELOW 50% OF SP
- 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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