Cosmo LS-R700 User Manual

80 7 Operations Listed By Purposes
7
When to execute a Mastering Value Sampling
A Mastering Value Sampling must be executed when the test parameters change, environmental conditions
change, or the drift portion shifts significantly.
• Beginning of the first shift
At the beginning of the morning shift (when the machine is turned on) it is expected that environmental
conditions will be significantly different from those at the time when the last Mastering was performed on
the previous working day. Also the first two hours of the morning shift are typically when these
conditions may change frequently, therefore, the Mastering Value Sampling may need to be initiated a
few times during this period.
• After a long break
During shift changes, breaks, or long waits for tested parts, etc., the ambient air temperature, fixtures, or
conditions of the Works themselves may vary. After such occasions, executing a Mastering Value
Sampling is recommended.
• Production Part Changeover
For production lines that produce multiple Works, each Work should be assigned to a specific leak tester
channel (CH). Therefore, a Mastering Value Sampling is required on the new channel immediately after
the model changeover.
• When the test parameters may have been altered
When settings such as stage timers are changed, the execution of a Mastering Value Sampling is
required.
• When Fail occurs consecutively
The seals in the fixture may be damaged in this case, assuming that a production line is unlikely to
produce defective Works consecutively. Since the test result of a Mastering Value Sampling shows
almost true leakage, it would help in determining if these Fail Judgments are from leaks or from
fluctuations due to drift.
Performing Mastering Value Sampling
When using the Mastering Compensation in air leak testing, execute Mastering Value Sampling right before
starting leak tests. Mastering can be executed periodically or when the system falls in a preset condition
using Mastering Request Signal.
Mastering Value Sampling can be executed externally through I/O port as well.
Set the Condition to transmit Mastering Request signal.
Set necessary conditions.
> Main Menu > Comp > Mastering Settings > Request Signal
2.2 Bypass Charge (Option)
Program the followings:
> Main Menu > Settings > Advanced Settings > CHG Options
- Precharge Timer (PCHG)
- Precharge Setting
- Precharge Upper Limit / Precharge Lower Limit
- Bypass Valve > Toggle to Enable.
Refer to
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for the details.

Cosmo LS-R700 Specifications

General

Brand	Cosmo
Model	LS-R700
Category	Test Equipment
Language	English