82
Zero Adjustment (ISFET)
This adjustment allows the use of ISFET sensors with differing nomi-
nal zero (pH only). The function is available when Sensor selection =
MEMOSENS has been set during configuration. Zero adjustment is
disabled for any other sensors.
The adjustment is made using a zero buffer (pH 7.00).
Permitted range for buffer value: pH 6.5 ... 7.5.
Temperature-corrected input. Maximum zero offset: ± 200 mV.
Display
Action
Remark
Select Calibration.
Press enter to proceed.
Ready for calibration.
Hourglass blinks.
Display (3 sec)
Now the device is in
HOLD mode.
Immerse sensor in a pH
7.00 buffer. Enter the
temperature-corrected
pH value in the range
6.50 to 7.50 using the
arrow keys (see buffer
table).
Confirm with enter.
If the zero offset of
the sensor is too
large (> ± 200 mV),
a CAL ERR error
message is gener-
ated. In that case the
electrode cannot be
calibrated.
Stability check.
The measured value
[mV] is displayed.
The “hourglass” icon is
blinking.
Note:
Stability check can
be stopped (by
pressing enter).
However, this re-
duces calibration
accuracy.
Zero adjustment
Summary of Contents for Stratos Pro A2 COND Series
Page 121: ...121 Buffer Tables 10 DIN 19267 buffers ...
Page 141: ...141 Index ...
Page 142: ...142 ...
