Hioki RM3545, Инструкция по эксплуатации, Страница: 269 / 364

Chapter 13 Specifications
261
13
(11)Temperature measurement settings
(12)Temperature Correction Function (TC)
(13)Offset Voltage Compensation Function (OVC)
Temperature sensor
types Thermistor sensor/ Analog input
Analog input Formula
t
: Displayed value (°C)
v : Input voltage (V)
V
1
: Reference voltage 1 (V) Setting range: 0.00 to 2.00 V
T
1
: Reference temperature 1 (°C) Setting range: -99.9 to 999.9°C
V
2
: Reference voltage 2 (V) Setting range: 0.00 to 2.00 V
T
2
: Reference temperature 2 (°C) Setting range: -99.9 to 999.9°C
Default setting Sensor type: Thermistor sensor, V
1
: 0 V, T
1
: 0°C, V
2
: 1 V, T
2
: 100°C
1 2
1 2 2
1 2
1 2
V V
V T V T
v
V V
T T
t
−
−
+
−
−
=
１
Operation Temperature correction converts resistance values to resistance values at
standard temperature and displays the result. (When
Δ
T is on, TC is automat-
ically turned off.)
Formula
R
t
: Measured resistance value (
Ω
)
R
t 0
: Corrected resistance value (
Ω
)
t
0
: Standard temperature (°C) Setting range: -10.0 to 99.9°C
t : Current ambient temperature (°C)
α
t 0
: Temperature coefficient (1/°C) at
t
0
Setting range: -99,999 to 99,999ppm/°C
Setting ON/ OFF (When
Δ
T is on, TC is automatically turned off.)
Default setting OFF, t
0
: 20°C,
α
t
0
: 3,930ppm/°C
) ( 1
0 0
0
t t
R
R
t
t
t
− +
=
α
Operation Reverses measurement current polarity to eliminate offset voltage effects
Applicable ranges Low-Power OFF : 0 m
Ω
range to 1000
Ω
range
Low-Power ON : All ranges
Setting ON/ OFF (When low-power is on, OVC is fixed to on.)
Default setting OFF