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instrument's power supply is disconnected before the meter is switched
off. Press the RESET button and restart the entire operation.
Power connection
Plug the 12VDC adapter (HI710005 or HI710006) into the socket on
the back of the meter (#5).
Note: Make sure your main line is protected by a fuse.
Note: HI8521 uses a rechargeable battery to retain the pH calibra-
tion data. It lasts approximately one month when fully charged.
The battery is automatically charged any time the meter is
plugged-in (either turned on or off).
SPECIFICATIONS HI 8521
Range pH 0.00 to 14.00
ISE 0.0 to ±399.9mV
ORP 0 to ±1999mV
°C 0.0 to 100.0
Resolution pH 0.01
ISE 0.1mV
ORP 1mV
°C 0.1
Accuracy pH ±0.01
(@20°C / 68°F) ISE ±0.2mV
ORP ±0.1mV
°C ±0.4
Typical EMC pH ±0.05
Deviation ISE/ORP ±4mV
°C ±0.1
Calibration Automatic 2 points with auto-buffer
recogntion
Temperature Automatic or Manual
Compensation From 0 to 100°C (32 to 212°F)
Electrode HI 1332B plastic body, combination,
double junction refillable
pH electrode (included)
Temperature Probe HI 7669/2W temp. probe (included)
Input Impedance 10
12
ohm
Power 12VDC power
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 230x170x70 mm (9.1x6.7x2.7")
Shipping Weight 1.4 Kg (3.1 lb.)
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