Performance Specifications - General; Blind & Analog Display Load/Power Supply Requirements; Digital Display Load/Power Supply Requirements - Emerson Rosemount 1181pH TRANSMITTER Instruction Manual

Combination ph/orp two-wire transmitters
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MODEL 1181pH/ORP
1.2 PERFORMANCE SPECIFICATIONS – GENERAL
Power Supply Requirements: (See Load/Supply Chart)
Lift Off Voltage: Blind & Analog: 10 VDC
Digital: 12.5 VDC
Maximum Operating Power: 40 milliwatts
Output: Blind & Analog: Isolated 4-20 mA into 700 ohms at 24 VDC
Digital: Isolated 4-20 mA into 575 ohms at 24 VDC
Input/Output Isolation: 600 Volts
Ambient Temperature: –30° to 55°C
2
FIGURE 1-1
BLIND & ANALOG DISPLAY
LOAD/POWER SUPPLY REQUIREMENTS
+45 VDC @ 800 OHMS MIN. 1750 OHMS MAX.
1.8 –
1.7 –
1.6 –
1.5 –
1.4 –
1.3 –
1.2 –
1.1 –
1.0 –
0.9 –
0.8 –
0.7 –
0.6 –
0.5 –
0.4 –
0.3 –
0.2 –
0.1 –
0.0 –
10 VDC
24 VDC
LIFT OFF
NOMINAL
POWER SUPPLY VOLTAGE
FIGURE 1-2
DIGITAL DISPLAY
LOAD/POWER SUPPLY REQUIREMENTS
+45 VDC @ 800 OHMS MIN. 1750 OHMS MAX.
1.8 –
1.7 –
1.6 –
1.5 –
1.4 –
1.3 –
1.2 –
1.1 –
1.0 –
0.9 –
0.8 –
0.7 –
0.6 –
0.5 –
0.4 –
0.3 –
0.2 –
0.1 –
0.0 –
12.5 VDC
24 VDC
LIFT OFF
NOMINAL
POWER SUPPLY VOLTAGE
Ambient Humidity: 0-99% RH
Digital Display Accuracy: 0.1% reading ±1.0 count
Analog Display Accuracy: ±2.0%
External Zero: ±7.5% full scale (25% for 1181T)
External Span: ±7.5% full scale (50% for 1181T)
Shock: 10G maximum for 10 milliseconds
Vibration: 0.025 inches double amplitude
5 to 50 Hz for 2 hours
EMI/RFI: EN61326
1750 OHMS
@ 45 VDC
OPERATING
600 OHMS
REGION
@ 45 VDC
LOAD
RESISTANCE
REQUIRED
33 VDC @ ZERO LOAD
45 VDC
MAXIMUM
1750 OHMS
@ 45 VDC
OPERATING
600 OHMS
REGION
@ 45 VDC
LOAD
RESISTANCE
REQUIRED
35.5 VDC @ ZERO LOAD
45 VDC
MAXIMUM
SECTION 1.0
DESCRIPTION AND SPECIFICATIONS

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