
4.
Change the decade box resistance and verify that the correct current is shown.
Calculate the current from the equation:
8.4.10
Simulating input currents - chlorine and ozone
To check the performance of the transmitter, use a decade box and a battery to simulate
the current from the sensor. The battery, which opposes the polarizing voltage, is
necessary to ensure that the sensor current has the correct sign.
1.
Disconnect the anode and cathode leads from terminals 13 and 14 and connect a
decade box and battery as shown in
.
It is not necessary to disconnect the RTD leads.
Simulate chlorine and ozone
Figure 8-12:
2.
Set the decade box to the resistance shown in the table.
Sensor
Polarizing voltage
Resistance
Expected current
499ACL-01 (free
chlorine)
200 mV
28 M
Ω
500 nA
499ACL-02 (total
chlorine)
250 mV
675 k
Ω
2000 nA
499AOZ
200 mV
2.7 M
Ω
500 nA
3.
Note the sensor current. It should be close to the value in the table. The actual value
depends on the voltage of the battery. To view the sensor current:
a. Go to the main display and press
DIAG
.
b. Press
NEXT
.
SEnSor Cur appears in the display.
Diagnostics and troubleshooting
Instruction Manual
113
Содержание Rosemount5081
Страница 1: ...Instruction Manual LIQ MAN 5081 Rev A September 2017 Rosemount 5081 Explosion Proof Transmitter ...
Страница 4: ......
Страница 10: ...Contents vi Rosemount 5081 ...
Страница 12: ...Startup procedure 2 Rosemount 5081 ...
Страница 23: ...Mounting 5081 on a pipe Figure 3 2 Installation Instruction Manual 13 ...
Страница 24: ...Installation 14 Rosemount 5081 ...
Страница 28: ...Wiring 18 Rosemount 5081 ...
Страница 50: ...Programming basics 40 Rosemount 5081 ...
Страница 130: ...Diagnostics and troubleshooting 120 Rosemount 5081 ...
Страница 136: ...Digital communications 126 Rosemount 5081 ...
Страница 138: ...NOTICE Consult the factory for additional information regarding service or repair Return of material 128 Rosemount 5081 ...
Страница 140: ...Engineering drawings 130 Rosemount 5081 ...
Страница 141: ...Engineering drawings Instruction Manual 131 ...
Страница 142: ...Engineering drawings 132 Rosemount 5081 ...
Страница 143: ...Engineering drawings Instruction Manual 133 ...
Страница 144: ...Engineering drawings 134 Rosemount 5081 ...
Страница 145: ...Engineering drawings Instruction Manual 135 ...
Страница 146: ...Engineering drawings 136 Rosemount 5081 ...
Страница 151: ...EU Declarations of Conformity 138 Rosemount 5081 ...