TESTO 770 - Frequency Measurement

7 Carrying out a measurement
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3. Connect test leads: black test lead to black jack, red test lead to red jack.
Then connect test leads to the test object.
4. The instrument displays the acve power in w(as) and the power factor (PF).
The instrument requires approx. 3 s for the reading to be displayed. An
updated reading is displayed aer approx. 3 s.
5. Switch between acve power, apparent power, reacve power and power
measurement for direct current/voltage: press [ ] <1 s.
7.6 Frequency measurement
The frequency is displayed automacally during an A AC or V AC measurement.
The following minimum values are necessary for correct display of
frequency with voltage and/or current measurement:
Voltage: 1 V
Current: 1.5 % of the measuring range (testo 770-1/-2/-3 (0590 7703))
0.5 % of the measuring range (testo 770-3 (0590 3770))
7.7 Temperature measurement (oponal)
(testo 770-2/-3 only)
A thermocouple adapter (0590 0021 for testo 770-2/-3 (0590 7703)) or
thermocouple probe (0590 0024 for testo 770-3 (0590 3770)) is oponally
available for measuring temperature. Before using the thermocouple adapter or
thermocouple probe, please carefully read through the relevant secon in the
documentaon. Familiarize yourself with the product before using it. Pay parcular
aenon to the safety instrucons and warning advice in order to prevent injuries
and damage to the product.
In this secon, it is assumed that you are familiar with the contents of the
documentaon relang to the thermocouple adapter and thermocouple probe.