Yokogawa PH72 Personal pH/ORP Meter - Manual (Page 39)

IM 12B03D02-01E 5-4
5. Keypad and Display Functions
5.2 Display Items
Display items and their descriptions are provided below.
F050201.EPS
Battery condition indicator
Manual mode
Temperature setting mode
Data mode
HOLD mode
Calibration mode
Sensor check mode
(1) Battery condition indicator
Indicates the level of the remaining battery life stepwise. means that there is
plenty of life left. A flashing means that the batteries are low and need to be
replaced immediately. When the indicator is flashing, access to calibration mode by
pressing CAL key is rejected. To replace the batteries, first press POWER key to turn
off power and make sure the display has been turned off, and then replace referring to
Section 2.1, “Installing the Batteries.”
(2) Temperature setting mode
Appears while manual temperature setting is being performed. (Refer to Section 5.3 (2),
“Manual temperature setting (M.tp) panel.”)
(3) Manual mode
Appears when a sensor without a built-in temperature element (needle type or test tube
size pH sensor) is connected to the meter. (Refer to Section 2.6, “Manual temperature
setting.”)
(4) Data mode
Appears when measured data are stored or when stored data are accessed. (Refer to
Section 5.1, “Keypad Functions,” and Section 5.3 (1), “Display stored data (dAt) panel.”)
(5) HOLD mode
Appears while measured data are being held temporarily. (Refer to Section 5.1, “Keypad
Functions.”)
(6) Calibration mode
Appears during calibration using standard solutions. (Refer to Chapter 4, “Calibration.”)
(7) Sensor check mode
This mark may appear when:
• the pH electrode deteriorated significantly (check is performed during calibration);
• the standard solution used for calibration changed in quality;
• deposits are present on the electrode (check is performed during calibration).
If deposits are present, clean the sensor (see Section 6.2); or,
• calibration is performed improperly.