YSI pHotoFlex pH Handheld Colorimeter - Manual (Page 55)

pHotoFlex
®
pH Operation
55 ba76123e01 02/2013
Sample of a record
Calibration evaluation After calibrating, the meter automatically evaluates the calibration. The
asymmetry and slope are evaluated separately. The worse evaluation
of both is taken into account. The evaluation appears on the display
and in the calibration record.
31.10.03 16:13
pHotoFlex Ser. no. 12345678
Calibration pH & ORP
Calibration date
31.10.03 16:13:33
Calibration interval 7 d
AutoCal TEC
Buffer 1 4.01
Buffer 2 7.00
Buffer 3 10.01
Voltage 1 184.0 mV 24.0 °C
Voltage 2 3.0 mV 24.0 °C
Voltage 3 -177.0 mV 24.0 °C
Slope
-60.2 mV/pH
Asymmetry 4.0 mV
Sensor +++
Sample dis-
play Calibration
record Asymmetry
[mV] Slope
[mV/pH]
+++ -15 ... +15 -60.5 ... -58
++ -20 ... +20 -58 ... -57
+ -25 ... +25 -61 ... -60.5
or
-57 ... -56
- -30 ... +30 -62 ... -61
or
-56 ... -50
Clean the electrode according
to the electrode operating
manual
---- ----
< -30 or
> 30 ... -62 or
... -50
Eliminate the error according to
chapter 6 W
HAT TO DO IF ...