IMT Si-I-420TC Instruction Sheet

Analogue Silicon Irradiance Sensors
Type Overview
Type
Si-I-420TC
Si-I-420TC-T
Si-V-10TC
Si-V-10TC-T
Si-V-1.5TC
Si-V-1.5TC-T
Si-mV-85
Si-mV-85-Pt100(-4L)
Si-mV-85-Pt1000(-4L)
Warranty and Liability
The irradiance sensor is designed for the measurement of the natural solar irradiance. The warranty is for 1 year from the
date of the invoice for the intended use. IMT Technology does not accept any liability for possible losses or damage due to
the incorrect usage of the sensor. Liability for consequential damages is excluded.
Special note: The housing for the Si sensors is not allowed to be opened by the installer or user, because, as a
consequence, the housing will no longer be sealed after it is closed. If the housing is opened, the manufacturer's
warranty will be rendered void.
Maintenance
Scope of the regularly check (at least once a year): Cleaning of solar cell, external damage, mechanical fastening, cable laying
and any damage to the cable. In the report IEA-PVPS T13-03:2014 "Analytical Monitoring of Grid-connected Photovoltaic
Systems" an interval of 1 to 2 weeks is recommended.
Should damage be found that degrades the function or safety, the sensor is to be replaced.
A recalibration is recommended by IMT Technology at least every 3 years.
O set and Gain for Configuration of Data Logger
Units: Irradiance G in W/m
F1 (calibration factor) in mV / (1000 W/m
Sensor type
Si-I-420TC
Si-I-420TC-T
Si-V-10TC
Si-V-10TC-T
Si-V-1.5TC
Si-V-1.5TC-T
Si-mV-85
Si i-mV-85-Pt100(0)
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Irradiance Signal
(0 to 1500 W/m )
2
4 to 20 mA
4 to 20 mA
0 to 10 V
0 to 10 V
0 to 1.5 V
0 to 1.5 V
0 to approx. 85 mV
0 to approx. 85 mV
0 to approx. 85 mV
; Voltage V in V (only mV with Si-mV-85(-PT100(0)); current I in mA;
2
Irradiance
G = 93.75 * I - 375 = 93.75 * (I - 4)
I = 1/93.75 * G + 4 = (G + 375) / 93.75
G = 150 * U
U = 1/150 * G
G = 1000 * U
U = 0.001 * G
G = U / F1
U = F1 * G
Cell Temperature Signal
(-40 to +90°C)
—
4 to 20 mA
—
0 to 10 V
—
0 to 2 V
—
Pt100
Pt1000
); T in °C
2
Temperature (only „-T" and „-PtXX")
T = 8.125 * I - 72.5 = 8.125 * (I – 8.923)
I = 0.1231 * T + 8.9231 = 0.1231 * (T + 72.5)
T = 13 * U - 40 = 13 * (V – 3.0769)
U = 0.0769 * T + 3.0769 = 0.0769 * (T + 40)
T = 65 * U - 40 = 65 * (U – 0.6154)
U = 0.0154 * T + 0.6154 = 0.0154 * (T – 40)
Pt100 or Pt1000
I N S T R U C T I O N S H E E T
Temperature
Compensation
yes
yes
yes
yes
yes
yes
no
no
no
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