Hach POLYMETRON 9135 Operator's Manual page 67

Transmitter 9135 – pH/redox measurement
ERROR MESSAGES DURING A CALIBRATION
NOTE : Press ESC to leave the menu and calibrate again.
PH CALIB.
SLOPE : 99,9%
ZERO : 4.00 pH
OFFSET
OUT OF LIMITS
PH CALIB.
S L O P E : 1 3 0 %
ZERO : 0.1 pH
SLOPE
OUT OF LIMITS
PH CALIB. PH CALIB.
∆
) T : +25.0°C ) T : +25.0°C
∆
) T ) T
OUT OF LIMITS OUT OF LIMITS
ERROR MESSAGES DURING AN IMPEDANCE MEASUREMENT TEST.
NOTE : Press ESC to leave the menu.
TEST
GLASS
TOO LOW
REFERENCE
TOO LOW
TEST
GLASS
TOO HIGH
REFERENCE
TOO HIGH
The zero shift is superior to the limit
programmed.
Limits :
- pH calibration : ± 3 pH
- redox calibration : ± 250 mV
The slope shift is superior to the limit
programmed.
Limits : 70...120 %
The temperature drift is superior to the limit
programmed.
Limits : -50°C/+20°C
The impedance measurement is inferior to
5 MΩ for the glass electrode and 100 Ω for
the reference electrode.
The impedance measurement is superior to
1 GΩ for the glass electrode.
Page 63