Introduction, Controller and Hotplate Assembly

2 Introduction

Hart Scientific’s Model 3125 Detachable Hot Plate is controlled by Hart Scien- tific’s 2200 controller and uses a precision platinum RTD as a sensor with a heater to control the temperature. The 3125 and 2200 are a matched set.

The controller display shows the temperature and also the set-point tempera- ture. The temperature may be set to any temperature within the range of 35°C to 400°C in 0.01°C or °F increments by using the buttons on the control panel. The controller’s multiple fault protection devices insure user and instrument safety and protection.

The Detachable Hot Plate (see Figure 1) consists of a controlled plate made of aluminum. A heater is attached to the bottom with an RTD temperature sensor used to control it. The housing consists of a top cover and a base, which serve as a clamp and strain relief point for the wiring. The Reference Well is avail- able for use with a 3/16-inch diameter probe, which may be used to check the plate temperature. This well is used to calibrate the system.

115V

1150/2300 W	3
10 A	3
115/230 V
50/60 Hz

PROBE

HEATER

RS-232

115/230 VAC 50/60 Hz

2200 Controller Back Panel

3125 Hot Plate Assembly

Figure 1 Controller and Hotplate Assembly

3125 specifications

The Fluke 3125 is a versatile and powerful digital multimeter designed for electrical technicians and engineers. This device stands out in the market for its precise measurements and rugged construction, making it ideal for both fieldwork and laboratory use.

One of the main features of the Fluke 3125 is its ability to measure a wide range of electrical parameters. With a measurement capability that includes AC and DC voltage up to 1000V, AC and DC current up to 10A, and resistance measurements up to 40MΩ, this multimeter is well-equipped to handle diverse applications. Additionally, it can perform continuity tests, diode tests, and frequency measurements, giving technicians the flexibility they need in various situations.

The Fluke 3125 employs advanced measurement technologies that enhance its performance. For example, it uses True RMS (Root Mean Square) measurement technology, which accurately measures the voltage and current levels of non-linear loads. This feature is especially important when working with fluctuating signals, ensuring reliable readings in real-world scenarios. Furthermore, the device is equipped with a built-in temperature measurement function, which adds an extra layer of utility for electricians dealing with HVAC systems or equipment testing.

Another notable characteristic of the Fluke 3125 is its robust design. Built to withstand tough environments, this multimeter is rated for drop protection and comes with a high IP rating, ensuring it is dust and splash resistant. The durability of the device makes it suitable for field operations where reliability is paramount. The user interface is also intuitive, with a large, backlit display that allows for easy reading of measurements in various lighting conditions.

Powering the Fluke 3125 is simple, as it operates on standard alkaline or rechargeable batteries, providing flexibility for users. Battery life is notably long, allowing technicians to work uninterrupted for extended periods. The device also features an auto-off function to conserve power when not in use, further enhancing its usability.

In summary, the Fluke 3125 is a multi-functional digital multimeter that combines accurate measurements, advanced technologies, and durability, making it an essential tool for professionals in the electrical field. Its wide measurement range and robust features ensure it meets the demands of various applications, whether in the lab, on-site, or in industrial settings.