8
Notes
:
• To perform correct ORP measurements, the surface of the ORP electrode must
be clean and smooth.
• When not in use, the tip of the electrode should be kept moist (use
HI 70300
storage solution) and safe from any mechanical stress which might cause
damage to the glass/platinum junction.
TEMPERATURE MEASUREMENTS
• Turn the instrument ON and press the RANGE key to select the temperature
mode.
• Make sure the temperature probe is connected to the meter.
• Dip the temperature probe into the sample, allow the reading to stabilize
(hourglass symbol turns off) and read the temperature value.
• Temperature measurements can be displayed in °C or °F units (see "Menu
selection" for details).
Notes
:
• A blinking full scale value means that the reading is out of range.
• To freeze a reading on display while in mea-
surement mode, press the HOLD key. The "HOLD"
tag will blink. The pH, mV and temperature
values are held, and the RANGE key can be
used to view the values. Press HOLD again to
return to normal mode.
• If enabled, keypresses are followed with an acoustic signal. A lower note
indicates that the key is not currently active.
• To save battery life, the meter is provided with an
auto-off feature
, which
turns the instrument off after 20 minutes of non-use. This feature can be
disabled by the user (see "Menu selection" for details).
21
120 mm
4.7"
5mm
0.2"
5mm DIA
0.2"
"S" VERSION
HI 1330
210 mm
8.25"
8 mm
0.3"
7.5mm DIA
0.29"
"S" VERSION
HI 1331
120 mm
4.7"
12 mm
0.5"
"S" VERSION
HI 1230
HI 1083B
Glass body, micro, Viscolene, non-refillable, combination
pH
electrode.
Use: biotechnology, micro titration.
HI 1131B / HI 1111S
Glass body, single junction, refillable, combination
pH
electrode.
Use: general purpose.
HI 1230B / HI 1210S
Plastic body, double junction, gel-filled, combination
pH
electrode.
Use: general purpose.
HI 1330B / HI 1310S
Glass body, semimicro, single junction, refillable, combination
pH
electrode.
Use: laboratory.
HI 1331B / HI 1311S
Glass body, semimicro, single junction, refillable, combination
pH
electrode.
Use: flasks.
120 mm
4.7"
12 mm
0.5"
5 mm
0.2"
3 mm
0.12"
3.0 mm DIA
0.12"
HI 1083
120 mm
4.7"
12 mm
0.5"
9.5mm DIA
0.37"
"S" VERSION
HI 1131