°C and °F To toggle between °C (Celsius) and °F (Fahrenheit) measurements, press the Menu softkey until °C or °F appears as the left softkey function. Press the corresponding softkey to change between the measurements. Min, Max, Avg, Differential The thermometers can measure minimum (MIN), maximum (MAX), average (AVG), or differential (.) temperatures each time a reading is taken. These values are not shown if a thermocouple is plugged into the thermometer. To turn on the Min Max mode: 1. Press

• Replace the batteries as soon as the low-battery indicator appears. • Do not use the thermometer if it operates abnormally. Protection may be impaired. When in doubt, have the thermometer serviced. • Do not operate the thermometer around explosive gas, vapor, or dust. • Do not connect the optional external probe to liveelectrical circuits. • To avoid a burn hazard or fire, know that reflective objects may be much hotter than the indicated temperature reading. • Do not leave the thermometer on

Printed in USA All product names are trademarks of their respective companies. Limited Warranty & Limitation of Liability This Fluke product will be free from defects in material and workmanship for 3 years from the date of purchase. This warranty does not cover fuses, disposable batteries or damage from accident, neglect, misuse or abnormal conditions of opera tion or handling. Resellers are not authorized to extend any other warranty on Fluke’s behalf. To obtain service during the warranty per

. Time Display: The elapsed time. 51 & 52 Series II Getting Started Buttons Table 5. Buttons . Press A to turn the thermometer on or off. . (Shift function) Press G, M (CANCEL) to stop displaying the minimum, maximum, and average readings in the secondary display. . Press Q to turn the backlight on and off. The backlight turns off after 2 minutes without any button presses. If the battery is low, the backlight is disabled. . Press M to step through the maximum, minimum, and average readings. Whe

Example: ALAR:RHUM1:SENS:ENAB 1 The RHUMidity suffix, , specifies the channel (1 or 2). The parameter turns the humidity sensor alarm on (1 or ON) or off (0 or OFF). This command may be password protected (see Password Commands). ALARm:RHUMidity:UPPer? Indicates whether an upper humidity alarm event has occurred for the specified channel. Example: ALAR:RHUM1:UPP? Response: 0 The RHUMidity suffix, , specifies the channel (1 or 2). A value of 1 is returned if an upper humidit