Campbell Scientific VDIV10.1 and VDIV2:1 Voltage Dividers - Manual (Page 5)

VDIV10.1, VDIV2.1 Voltage Divider
Terminal Input Modules
1. Function
Terminal input modules connect directly to the datalogger's input terminals to
provide completion resistors for resistive bridge measurements, voltage dividers,
and precision current shunts. Voltage dividers are used to divide a voltage to
provide a reduced voltage output that is a fraction of the original voltage. The
VDIV10.1 is a 10:1 voltage divider, the output voltage is one tenth the input
voltage, and allows a voltage up to ±25 volts to be measured on a ±2500 mV
range (CR10(X)) and up to ±50 volts to be measured on a ±5000 mV range
(21X, CR7, CR9000(X), CR23X, CR1000, CR800, CR850, CR3000, CR5000).
The VDIV2.1 is a 2:1 voltage divider, the output voltage is one half the input
voltage, and allows a voltage up to ±5 volts to be measured on a ±2500 mV
range (CR10(X)) and up to ±10 volts to be measured on a ±5000 mV range
(21X, CR7, CR9000(X), CR23X, CR1000, CR800, CR850, CR3000, CR5000).
Each voltage divider module may be used to measure one differential voltage
or two single-ended voltages.
H
L
AG
H
L
AG
H
L
G
FIGURE 1-1. Terminal Input Module
2. Specifications
2.1 VDIV10.1
10:1 Resistive Divider
Resistors
90 k
Ω/10 kΩ
Ratio Tolerance @ 25
°C
±0.02%
Ratio Temperature
coefficient
2 ppm/
°C
Power rating 0.25 W
Maximum Input Voltage 50 volts
1