EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1
Pg. 22
Voltage output (0-1V)
The current output can be converted into a voltage output when a shunt resistor is used in parallel. The default
output is 4-20mA. The 0-10mA (0-1V) output is disabled. The settings can be changed when the MS-80S is
connected to a PC through the Hibi software, see appendix 3 for instruction.
Connect the 3 wires with corresponding color to the input terminals of the Voltmeter or data logger (figure 5-9).
Connect the power terminals to a DC power supply [8 to 30 V]. We recommend to use a fuse [0.5A] to the DC power
supply line [+] for over current protection. The precision shunt resistor (0.1%, 15 ppm) need to be placed across the
voltage input terminals of the measurement device.
Interconnect the power supply (-) and 4-20mA / 0-10mA (-) line. The MS-80S current output
requires a 3 wire connection, contrary to the 2 wire configuration of MS-80A which is
current loop.
When a precision shunt resistor (0.1%, 15ppm) is used in combination with the 4-20mA output it is
required to match the precision shunt resistor value with supply Voltage to compensate for the
voltage drop across the shunt resistor. (See the Table 5-7. )
Table 5-7. Shunt resistor value at supply voltage
Supply voltage Shunt resistor value
8VDC to 15VDC 100Ω to 250Ω
15VDC to 24VDC 250Ω to 500Ω
24VDC to 30VDC 500Ω
Power supply
DC 8V to 30V
0 to 1V input
Voltmeter
Fuse [0.5A]
R
Brown
White
Gray
Shield
Fig. 5-9. How to connect MS-80S (0-1V output)
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