This is an Fluke® 51 & 52 Series II Thermometer Users Manual
This manual covers the Fluke 51 and 52 Series II digital thermometers. It introduces the devices, lists the components, explains the display elements and button functions, and guides users through basic operation, temperature measurement, and setup options.
Maintenance procedures, calibration recommendations, specifications, and a list of replacement parts and accessories are also included, along with safety warnings and warranty information.
| Weight | 280 g (10 oz) |
|---|---|
| Dimensions (with holster) | 2.8 cm × 7.8 cm × 16.2 cm |
| Battery type | 3 AA batteries |
| Operating temperature range | −10 °C to 50 °C (14 °F to 122 °F) |
| Storage temperature range | −40 °C to +60 °C (−40 °F to +140 °F) |
| Humidity range (operating) | 0 % to 90 % (−10 °C to 35 °C) |
| Thermocouple accuracy (type K) | ± 1.1 °C (± 2.0 °F) |
| Maximum differential common‑mode voltage | 1 V |
| Display resolution | 0.1 °C / °F / K < 1000 °C, 1.0 °C / °F / K ≥ 1000 °C |
Fluke recommends calibrating the thermometer annually, starting one year after purchase.
The thermometer uses three AA batteries.
The maximum differential common‑mode voltage is 1 V.
The device operates from –10 °C to 50 °C (14 °F to 122 °F).