MULTIPOINT CIRCULAR-CHART RECORDER: USER GUIDE
Page 129
HA250385
Issue 7 Nov 06
A2 TECHNICAL SPECIFICATION (Input board)
General
Termination
Terminal block
Maximum number of inputs
Six.
Input ranges
±
38mV,
±
150mV,
±
1V,
±
10V
Input types
DC Volts, dc millivolts, dc milliamps (with external shunt), thermocouple, 2 / 3-wire resistance temperature detector
(RTD), Ohms, Contact closure (not channel 1) (Minimum contact closure = 500msec)
Input type mix
Freely configurable
Noise rejection (48 to 62 Hz)
Common mode: >130dB (channel - channel and channel - to - ground). Series mode: >60dB.
Maximum common mode voltage
250 Volts continuous
Maximum series mode voltage
45 mV peak at lowest range; 12 Volts peak at highest range.
Isolation (dc to 65 Hz; BS EN61010)
Installation category II; Pollution degree 2
300 V RMS or dc channel - to - channel (double insulation) and channel - to - ground (basic insulation)
Dielectric strength (BS EN61010)
Channel - to ground =1350 Vac; Channel - to - channel = 2300 Vac (both 1 minute type tests).
Insulation resistance
>10 M
Ω
at 500 V dc
Input resistance
>10M
Ω
(38mV, 150mV, 1V); 68K
Ω
on 10V
(always use mA input type for current inputs with shunts
as it corrects for the 68K)
Overvoltage protection
42 V rms (terminal I to terminal V-), 50 V rms (terminal V+ to terminals V- or I)
Sensor break detection
±
57 nA max.
Recognition time
500 msec.
Minimum break resistance
10 M
Ω
DC Input ranges
Shunt/Attenuator
Resistor or voltage divider for terminal board mounting
Additional error due to shunt
0.1% of input
Additional error due to attenuator
0.2% of input
Performance @ 20 ˚C,
±
2˚C
(Continued)
38 mV
0.085% input + 0.051% range 80 ppm input + 18.6 ppm range
80 ppm input + 7.8 ppm range
80 ppm input + 1.6 ppm range
272 ppm input + 3.5 ppm range
Typical
Max
150 mV
1 V
10 V
Typical
Max
Typical
Max
Typical
Max
0.084% input + 0.038% range
0.084% input + 0.029% range
0.275% input + 0.030% range
1.4 V
37 V
370 V
5.5 V
0.035% input + 0.030% range
0.035% input + 0.027% range
0.035% input + 0.024% range
0.076% input + 0.024% range
37 ppm input + 1.03 ppm range
35 ppm input + 0.52 ppm range
35 ppm input + 0.16 ppm range
76 ppm input + 0.35 ppm range
Range
Res-
olution
Error at 20 C
Temperature coefficient (per C)
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