Measuring Temperature; Measuring Cyclic Ratios - Facom 714 Guía De Instrucciones

Measuring temperature

• Internal temperature:
- Remove any item connected to the input terminals.
- Set the rotating switch to "T°"
- Press the yellow key to select the °C or °F unit.
The display then indicates the temperature inside the casing (T° and INT symbols lit).
Note: As the temperature probe is inside the casing, the measurement performed reflects the
ambient temperature after thermal stabilisation only, the tester's specific heat being negligible.
To view the minimum and maximum values of the current reading, press the "MIN/MAX"
key several times.
• External temperature:
- Connect the temperature probe (here the K couple) onto the adapter connected to the
input terminals (712.01)
- Set the rotating switch to "T°".
- Press the yellow key to select the °C or °F unit.
The display then indicates the temperature measured by this probe (T° and EXT symbols lit).
If the probe is offline or the temperature exceeds 3999°C, the display indicates the tester's
internal temperature (INT symbol lit instead of EXT).
To view the minimum and maximum values of the current reading, press the "MIN/MAX"
key several times.
Function
Type of sensor
Display range
Operating range
Linearised measurement
domain
Measurement domain
Intrinsic error
Resolution
Sensor offline detection
Thermal time constant
Note 1: The accuracy specified for external temperature
measurement omits the accuracy of the K couple.
Note 2: Use of the thermal time constant: If the tester's
temperature varies brutally (e.g. by 10°C), the tester is at
95% (or 99%) of the final temperature, i.e. 0.5°C
(or 0.1°C) of this value after 3 (or 5) time constants, i.e.
0.7x3(5)x10 = 21 (or 35) min.
Cyclic ratio measurement
• Connect the cords to the input terminals, with the reference potential connected to the
"COM" terminal.
• Set the rotating switch to "%".
• The "%" unit symbol appears, and the digital display indicates the value of the cycle ratio
if the signal's polarity matches the trigger level chosen ("T+" displayed by default).
• Otherwise, the value of the cyclic ratio is undetermined (display:
blinks.
• In this case, change the trigger level sign ("T-" displayed) by pressing the appropriate key.
• If the display still shows
frequency is outside the tester's measurement domain.
20
Internal temperature
IC
400 °C or 400 °F
-10,0 °C to +50,0 °C
+15 °F to +120 °F
NO
-10 °C to +50 °C
+15 °F to +120 °F
± 1,5 °C
± 2,7 °F
0,1 °C
0,2 °F
NO
0,7 min./°C
, regardless of the polarity class, this means the signal
External temperature
K couple
400 °C or 400 °F
-50,0 °C to +399,9 °C +400 °C to +1200 °C
-50,0 °F to +399,9 °F
-50 °C to +1000 °C
-58 °F to +1832 °F
-50,0 °C to +399,9 °C +400 °C to +1000 °C
-50,0 °f to +399,9 °F
1%L ± 1,5 °C
1%L ± 2,7 °F
0,1 °C
0,2 °F
INT symbol lit instead of EXT
According to sensor model
4000 °C or 4000 °F
+400 °F to +2192 °F
+400 °f to +1832 °f
1%L ± 1,5 °C
1%L ± 2,7 °F
1 °C
1 °F
) and the "T+" symbol