VDIV2:1 2-to-1 Voltage Divider Terminal Input Module

Overview

The VDIV2:1 uses precision resistor networks to bring sensors with high output voltages into your datalogger’s common mode range, allowing your datalogger to measure the sensor. The VDIV2:1 divides the sensor’s signal voltage by a factor of two.

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Benefits and Features

  • Connects directly into datalogger input terminals
  • Easy to install or remove
  • Low power consumption

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Detailed Description

The VDIV2:1 contains two 10 kΩ resistors that have a ratio tolerance of ±0.02%. Increased input settling time may be necessary to accommodate the relatively high resistance of the voltage divider.

Specifications

Division Ratio 2:1
Resistors 10 kΩ and 10 kΩ
Ratio Tolerance ±0.02% (@ 25°C)
Power Rating per Element 0.1 W (@ 70°C)
Maximum Ratio Temperature Coefficient 2 ppm/°C (0° to 70°C)
Dimensions 1.5 x 1.5 x 2.7 cm (0.6 x 0.6 x 1.0 in.) for body with prongs
Weight 6 g (0.2 oz)

Compatibility

Datalogger Considerations

The VDIV2:1 uses two adjacent single-ended analog inputs (one differential channel); an adjacent analog ground channel accepts the "ground prong" of the VDIV2:1. Not all datalogger terminal strips have this sequence on all channels, so please check your datalogger's wiring panel to confirm channel assignments, especially if you plan to use multiple terminal input modules.

Please note that if a CR10X will be used to measure thermocouples in the same application, newer CR10X Wiring Panels and the CR10XTCR Reference Thermistor (with its accompanying thermocouple cover) are deep enough to cover the datalogger input channels with a VDIV2:1 attached; older CR10TCRs are not deep enough.

Programming

The VDIV2:1 is measured with either the VoltSE or VoltDiff Instruction in CRBasic, and with Instruction 1 (SE Volts) or 2 (DiffVolts) in Edlog. Each VDIV2:1 can be wired to make one differential measurement or two single-ended measurements.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR6 CR300 Series

Compatible Retired Datalogger

CR500 CR510 CR10 CR10X 21X CR23X CR5000 CR7X CR9000
#

Datalogger Notes:
‡Compatible CR9000(X) modules are the CR9050 and the CR9052; the CR9051 is partially compatible.

#As shipped, the prongs on the VDIV2:1 are too short to fit the CR7. If you're determined to use the VDIV2:1 with a CR7, you can solder wire to the prongs, thereby extending their length.


Frequently Asked Questions

Number of FAQs related to VDIV2:1: 3

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  1. These two voltage dividers can handle different maximum input voltages.

    • The VDIV2:1 has a maximum input voltage of 10 V.
    • The VDIV10:1 has a maximum input voltage of 50 V.
  2. The CR1000 can measure analog voltages in the ±5 Vdc range. A voltage divider such as the VDIV2:1 is required to reduce 10 Vdc to an acceptable range. For examples of wiring and programs, see the VDIV10:1/VDIV2:1 manual

  3. The CR1000 has analog inputs that measure voltage in a ±5 Vdc range. To measure a 12 Vdc voltage, a voltage divider is needed. In its simplest form, a voltage divider comprises two resistors. Precision differential voltage dividers, such as the VDIV10:1, are available for this purpose.