This document is an operating instruction for Messko brand's pointer thermometer, which introduces the safety instructions, product specifications, installation, electrical connection, indication control and readjustment, adjustment of the gradient, maintenance, and technical data of the compact series thermometers including MT-ST160SK/TT, MT-ST160W, MT-ST160W/TT, MT-ST160WR, and MT-ST160WR/TT.
The Messko MT‑ST160 series pointer thermometers are designed for measuring the temperature of power transformers, reactors, and similar equipment. The manual provides safety instructions, product specifications, installation steps, electrical connection details, and adjustment procedures.
The document covers mounting the device on a transformer, routing the capillary tube, connecting microswitches and sensor circuitry, performing gradient adjustments, and routine maintenance. Technical data such as measuring range, tolerance, protection rating, and microswitch specifications are listed in the technical data section. This manual is written in Chinese.
| Measuring range | -20 °C … 140 °C |
|---|---|
| Temperature tolerance | ±3 °C (class 1) |
| Degree of protection | IP55 |
| Ambient temperature range | -50 °C … 80 °C |
| Microswitch rated current (AC) | 5 A at 250 VAC (110 VAC) |
| Microswitch rated current (DC) | 0.4 A at 250 VDC, 0.6 A at 110 VDC |
| Adjustable microswitches | 1 to 6 |
| Sensor output signal | 4…20 mA, two‑wire |
| Sensor supply voltage | 12 V … 30 V DC |
The pointer thermometer is used to measure the temperature of power transformers, reactors, or similar equipment.
Only qualified personnel may install, commission, operate, or maintain the device; all work on live parts must be performed with power removed or protected, and a ground connection is required.
The device can be equipped with one to six adjustable microswitches.