Chapter 11 METER SETTING
11.2 System setup
134 HORIBA
11.2.3 AutoHold setting
AutoHold setting is the function in which the meter judges the potential stability to assure the
measurement values. As the stability condition, five types of setting mode are available.
The AutoHold condition for calibration and inspection should become Standard in regardless
of the selected mode option.
Due to operation processing, the hold condition is not always given even when it seems to
satisfy the stabilization criteria.
Setting to “EXACT” gives the time to HOLD longer.
The AutoHold judgment for the resistivity is calculated by the conductivity values.
Mode
Measuring
target
Criteria
EXACT pH, mV, ION Potential change in 10 seconds: within 0.3 mV
Temperature change in 10 seconds: within 2.0 ℃
COND Potential change in 10 seconds: within 1digit
Temperature change in 10 seconds: within 2.0 ℃
Salinity Potential change in 10 seconds: within 0.03%
Temperature change in 10 seconds: within 2.0 ℃
NOR-
MAL
pH, mV, ION Potential change in 10 seconds: within 1 mV
Temperature change in 10 seconds: within 2.0 ℃
COND Potential change in 10 seconds: within 3 digit
Temperature change in 10 seconds: within 2.0 ℃
Salinity Potential change in 10 seconds: within 0.10%
Temperature change in 10 seconds: within 2.0 ℃
BRIEF pH, mV, ION Potential change in 10 seconds: within 3 mV
Temperature change in 10 seconds: within 2.0 ℃
COND Potential change in 10 seconds: within 5 digit
Temperature change in 10 seconds: within 2.0 ℃
Salinity Potential change in 10 seconds: within 0.3%
Temperature change in 10 seconds: within 2.0 ℃
TIME The values are held at the set time.
Setting range: 2 to 999 (sec)
OFF The AutoHold function becomes invalid.
When set to OFF, pressing MEAS key will hold the values
at that time. (Manual HOLD)
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