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Aquaread BlackBox™ Instruction Manual
10401-00618 Rev P
13
0x000C
Electrical resistivity
(Ω·cm) – lower 16
bits
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
14
0x000D
Salinity (PSU × 100) AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
15
0x000E
Total dissolved
solids (mg/L)– upper
16 bits
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
16
0x000F
Total dissolved
solids (mg/L) – lower
16 bits
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
17
0x0010
Specific seawater
gravity (σ
t
× 10)
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
18
0x0011
Dissolved oxygen
(mg/L × 100)
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
19
0x0012
Dissolved oxygen
(% air saturation ×
10)
AP-300, AP-500, AP-600, AP-700,
AP-800, AP-900, AP-1000, AquaPlus,
AP-2000, AP-5000, AP-7000
20
0x0013
Probe depth (cm)
All probes with depth sensor fitted
21
0x0014
AUX1 measurement
– upper 16 bits
AP-800
†
, AP-2000, AP-Lite,AP-5000, AP-
7000
22
0x0015
AUX1 measurement
– lower 16 bits
AP-800
†
, AP-2000, AP-Lite, AP-5000,
AP-7000
23
0x0016
AUX2 measurement
– upper 16 bits
AP-2000, AP-5000, AP-7000
24
0x0017
AUX2 measurement
– lower 16 bits
AP-2000, AP-5000, AP-7000
25
0x0018
AUX3 measurement
– upper 16 bits
AP-5000, AP-7000
26
0x0019
AUX3 measurement
– lower 16 bits
AP-5000, AP-7000
27
0x001A
AUX4 measurement
– upper 16 bits
AP-5000, AP-7000
28
0x001B
AUX4 measurement
– lower 16 bits
AP-5000, AP-7000
29
0x001C
AUX5 measurement
– upper 16 bits
AP-7000
30
0x001D
AUX5 measurement
– lower 16 bits
AP-7000
31
0x001E
AUX6 measurement
– upper 16 bits
AP-7000
32
0x001F
AUX6 measurement
– lower 16 bits
AP-7000
33
0x0020
Ammonia
concentration (mg/L
x 100) – upper 16
bits
AP-2000, AP-5000, AP-7000
(if ammonium electrode fitted)
34
0x0021
Ammonia
concentration (mg/L
x 100) – lower 16
bits
AP-2000, AP-5000, AP-7000
(if ammonium electrode fitted)
Modbus Input Registers
* AP-800 running software version 3.53 or below. † AP-800 running software version 4.00 or above
All measurement values are two's complement numbers (i.e. top bit set to represent a
negative value). Any AUX values that are invalid will be returned as 0x80000000.
All AUX electrode measurement values are output at the measured value x 100.
© 2019 Aquaread Ltd.
www.aquaread.com
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