Thermo Scientific MIE ADR-1500, Instruction Manual

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Outputs and Alarm
7-2 MIE ADR-1500 Instruction Manual Thermo Fisher Scientific
The ADR-1500 incorporates the capability to provide both a voltage and a
current signal output directly proportional to the sensed concentration of
airborne particulates. Both these analog signal outputs are concurrently
available. These outputs are provided, principally, for fixed-point
applications with hard-wired installations.
The particulate concentration range corresponding to the output voltage
and current ranges (0 to 2 V and 4 to 20 mA) can be user selected on the
ADR-1500 screen (see “
Configuration Review ” on page 3-29 ) or via a PC
using the pDR Port communications software package included with the
instrument. The most sensitive range available is 0 to 0.01 mg/m 3 (0 to
10.0 μg/m 3 ), and the least sensitive range is 0 to 400 mg/m 3 . For example,
if the user selects the analog output range of 0 to 0.400 mg/m 3 then the
analog output signal levels, at a concentration of 0.200 mg/m 3 , would be
1.0 V and 12 mA. This Analog Output concentration range is independent
of the ranging used for the digital display, data logging and real-time digital
output range which are controlled automatically (auto ranging).
Since both voltage and current outputs are present at the same time, both
can be used concurrently, if so required. The accuracy of the analog output
signals is better than 1% of the reading with respect to the digital reading.
The 4 to 20 mA current output is available between pins # 2 and 3 of the
6-pin ANALOG OUTPUTS connector on the side panel (see
Figure 2–7 ).
The 0 to 2 V analog voltage output is available between pins # 1 and 5 of
that connector. Pin # 3 and 5 are power ground.
Equipment Damage For the 0 to 2 V output signal, the externally
connected load must have an impedance of more than 200 kilo-ohms; For
the 4 to 20 mA output signal, the externally connected load must have an
impedance of less than 300 ohms.
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Analog Signal
Output