The CAL measurements are applicable when SPC’s TSC-1 Ozonizer/Test unit is used. You can ignore them with the KTU-3 ozonizer. |
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Write down the following information:
Date: ________ Station:_________ Operator: __________
Ozonesonde number: _______________
Manufacturer: _______________
Date of manufacture: _______________
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Change cathode solution in SONDE (S) and CAL (calibrator, C; with TSC-1 only)
sensors:
S: _______ ml
C: _______ml
The ASOPOS panel recommends the following:
- Dump both solutions carefully (cathode and anode).
- Recharge cathode cell with 3.0 cm3 cathode solution.
- Recharge anode cell with 1.5 cm3 anode solution.
- Condition SONDE (S) and CAL (C; with TSC-1 only) NO O3 for 10 minutes.
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Sensor’s background currents (< 0.2 μA. ASOPOS recommendation 0.05 μA):
ibc = _______ μA
ibs= ________ μA (<0.05 μA; defined as IB0 by ASOPOS)
- Condition SONDE and CAL (with TSC-1 only) sensors with 5±0.2 μA O3 for 5 minutes.
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After 5 minutes of conditioning with about 5 μA O3:
ic = μA ________ is = μA________
With NO O3, check the sensor response test:
i0.51c: = ________μA i0.5s: μA ________0.5 minute
i1c: = ________μA i1s: μA ________1 minute
i2c: = ________μA i2s: μA _______ 3 minutes
i3c: = ________μA i3s: μA _______ 5 minutes
i10c: = ________μA i10s: μA ______ 10 minutes (equals to IB1)
Record cell current at t = 0, 0.5, 1, 3, 5, and 10 minutes (as recommended by ASOPOS i10s = IB1 background current).
Computed for calibration acceptance check out:
(ic-ibc) tc = ________ (is-ibs) ts = ______ (agree to within 5%. If necessary, take corrective action to get the desired result. See Science Pump Corporation’s Operator’s Manual for further instructions.)
i1c = ________ <0.20 (ic-ibc)______
i1s = ________ <0.20 (is-ibs)______
or, alternatively with DMT ozonizer:
i1s = _______ <0.20 (is-IB1)
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Continue running the SONDE with ozone-free air, and connect the air flow meter to the
exhaust port of the cathode cell.
Measure:
SONDE sensor air flow rate:
ts =________ , ________ , ________ , ________ , ________ s
CAL sensor air flow rate (with TSC-1 only):
tc =________ , ________, ________ , ________ , ________ s
Troom = ______°C; Proom =______ hPa; RHroom = ______%