Hanna Instruments HI931, User Manual, Page: 192 / 218

22
ALTERNATIVE CALCULATIONS
If the actual values of the above parameters are not accessible the
following equation can be used:
V=M*F
V Volume of measured mass of water (mL)
F Transformation factor
The transformation factor takes into account the air buoyancy, the
water density and temperature dependence. Standard values can be
used to obtain the transformation factor.
The values from the table below have been calculated by correcting
the air and water density with temperature, assuming the density of
dry air
ρ
air
= 0.0012 g/mL and density of calibration steel standard
weigh
ρ
STD
= 8 g/mL.
Temperature ( °C) Factor
17.0 1.002290
18.0 1.002467
19.0 1.002654
20.0 1.002853
21.0 1.003061
22.0 1.003282
23.0 1.003512
24.0 1.003752
25.0 1.004002
26.0 1.004261
27.0 1.004531
28.0 1.004809
29.0 1.005097
30.0 1.005395
TEMPERATURE CHANNEL FAST CHECK PROCEDURE
• Connect the shorting cap to the BNC socket on Analog Board 1.
• Connect the HI762000C 0°C temperature key to the RCA socket
(temperature sensor input) on Analog Board 1.
• On the main screen select , if necessary select the
analog board and press .
• The titrator should display ATC 0.0 ± 0.4°C with no fluctuations
or drift.
• Connect the HI762070C 70°C temperature key to the RCA socket
(temperature sensor input) on Analog Board 1.
• The titrator should display ATC 70.0 ± 0.4°C with no
fluctuations or drift.
• This procedure can be repeated on analog board 2.
TEMPERATURE & MV CHANNEL LOGGING PROCEDURE
• Connect the shorting cap to the BNC socket on Analog Board 1.
• Connect the HI762000C 0°C temperature key to the RCA socket
(temperature sensor input) on Analog Board 1.
• On the main screen select , if necessary select the
analog board and press .
• Press and use the arrow keys to highlight Logging
Interval
. Set the logging interval to 15 seconds and press
. Press to return to the main screen.
• Press the key and use the arrow keys to highlight
Setup
pH/mV/ISE Report , press .
• Select Potential and Temperature and Units (the selected fields
are marked with an *). All other fields should be unselected.
• Press to return to the Data Parameters screen.
• Press to return to the main screen.
• Once on the main screen press to start the automatic
log.
• Let the log run for about 10 minutes. Press to stop
the automatic log.
• Press , use the arrow keys to highlight Review Last
Analysis Report , and press .
• The mV column should display 0.0 ± 0.1 mV and the
temperature column should display 0.0°C ± 0.4°C.
• This procedure can be repeated using the HI762070C 70°C
temperature key and on analog board 2.
TROUBLESHOO
TING 1
TROUBLESHOOTING 1
METHOD ID: HI1011EN