Hanna Instruments HI 8521 - Manual (Page 12)

12
COMBINED
pH or ORP
ELECTRODES
REFERENCE
ELECTRODE RESET
TEMPERATURE
PROBE
1 2 3 4 5
DC POWER
12V to 20V
+
RANGE
OFF
Temperature Buffer Values (pH)
°C °F 4.01 7.01 10.01
0
10
20
30
40
32
50
68
86
104
4.01
4.00
4.00
4.02
4.04 7.13
7.07
7.03
7.00
6.98 10.32
10.18
10.06
9.96
9.88 CON
ERROR SYMBOLS
°C
CAL
ON
E1: pH out of range
E2: °C out of range
E3: mV out of range
E4: wrong pH 7
E5: wrong pH 4/10
FUNCTIONAL DESCRIPTION &
SPECIFICATIONS OF HI8521
THE FRONT PANEL OF HI8521
ON / OFF To switch instrument ON and OFF.
RANGE To display pH / ORP / Temperature measurements.
CAL/CON CAL to enter the calibration procedure and CON to
confirm calibration data.
/ For setting temperature for manual compensation.
THE REAR PANEL OF HI8521
1. BNC socket for pH or ORP electrode.
2. Reference Jack socket for reference electrode.
3. RESET button.
4. Temperature Probe socket (for HI7669/2W).
5. DC Power Socket (for HI710005 or HI710006).
Electrode and probes connections
For combination pH or ORP electrodes (with internal reference) plug
the electrode's BNC to the socket provided (#1).
For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket and the reference electrode's jack
to the socket provided (#2).
For temperature measurements and automatic temperature com-
pensation connect the temperature probe to the °C socket (#4).
RESET button
The RESET button (#3) is used when the instrument displays errone-
ous messages due to strong electrical interference or when the