5
FUNCTIONAL DESCRIPTION
1) Socket for temperature probe
2) RS232 connector
3) BNC connector for pH electrode
4) Liquid Crystal Display (LCD)
5)
ON/OFF
key, to turn the meter on and off
6)
ALT
key, to alternate key function
7)
RANGE / GLP
key, to select measurement ranges, to display time
and date, and to view calibration data (with ALT)
8)
CAL / AutoEnd
key, to enter pH calibration mode or (with
ALT
)
to enter Auto Endpoint mode
9)
/ CFM
key, to move down or confirm values (with ALT)
10)
LOG / RCL
key, to store or recall measurements (with ALT)
11)
/ FNC
key, to move up or enter setup mode (with ALT)
12)
LIGHT / DEL
key, to turn the LCD backlight on and off and to
delete stored data (with ALT)
ON / OFF
ALT
LIGHT
HI 98160
Microprocessor Logging pH/ORP Meter
LOG
RANGE
CAL
For refillable electrodes:
Refill it with fresh electrolyte (
HI7071
for single junction or
HI7082
for
double junction). Allow the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.
CLEANING PROCEDURE
General Soak in Hanna
HI7061
General Cleaning Solution
for
approximately 1 hour.
Removal of films, dirt or deposits on the membrane/junction:
-
Protein
Soak in Hanna
HI7073
Protein Cleaning
Solution
for 15 minutes.
-
Inorganic
Soak in Hanna
HI7074 Inorganic Cleaning
Solution
for 15 minutes.
-
Oil/grease
Rinse with Hanna
HI7077 Oil and Fat Cleaning
Solution
.
IMPORTANT:
After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water, drain and refill the
reference chamber with fresh electrolyte, (not necessary for GEL filled
electrodes) and soak the electrode in
HI70300
Storage Solution
for
at least 1 hour before taking measurements.
TROUBLESHOOTING
Evaluate your electrode performance based on the following possibilities.
• Noise
(Readings fluctuate up and down) could be due to:
- Clogged/Dirty Junction:
Refer to the Cleaning Procedure above.
- Loss of shielding
due to low electrolyte level (in refillable
electrodes only): refill with fresh
HI7071
for single junction or
HI7082
for double junction electrodes.
• Dry Membrane/Junction:
Soak in
Storage Solution HI70300
for at least 1 hour.
• Drifting:
Soak the electrode tip in warm Hanna Solution
HI7082
for one hour then flush tip with distilled water. Refill with
fresh
HI7071
for single junction electrodes and
HI7082
for double
junction electrodes.
• Low Slope:
Refer to the cleaning procedure above.
• No Slope:
Check the electrode for cracks in glass stem or bulb
and replace the electrode.
• Slow Response/Excessive Drift:
Soak the tip in Hanna Solu-
tion
HI7061
for 30 minutes, rinse thoroughly in distilled water
and then follow the Cleaning Procedure above.
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