Omega DP20 User Manual

12
DP20 Economical Multisignal Meter Instruction Manual
• Accepted NTC probes
The NTC probe is a temperature variable resistor
with a temperature - resistance curve dened by two
parameters called ‘R25’ and ‘beta’. By default, the
instrument is congured for a standard NTC with ‘R25’
of 10K and ‘beta’ of 3500. The measured temperature ranges from
-60 ºC to 150ºC.
Dierent NTC probes can be used, by conguring the instrument for
dierent values of ‘R25’ and ‘beta’. The instrument measures
resistance from 100 R up to 1 MOhm. Use ‘Table 12’ to write down
values for your NTC.
• Parameters ‘R
25
’ and ‘Beta’
The instrument accepts values of ‘beta’ between 2500 and 5500,
and values of R25 between 1.0 K and 200.0 K
• Resoluon and units
The temperature resoluon using NTC temperature probes is
congurable to 1º or 0.1º. Reading can be congured in ºC (degrees
Celsius) or ºF (degrees Fahrenheit).
Range
of measure
NTC probe
Temp. R25 Beta
100 R
1 MOhm
Table 12 - Data from NTC datasheet
• Sensor break detecon
In case of sensor break, the instrument will show ‘h.ovr’ or ‘h.udr’
(see Table 18) depending on the broken cable.
• Terminal 5 ‘mulfuncon’ - External control
Terminal 5 remains congured as ‘EK’ external control funcon. See
secon 1.9 for a list of available funcons.
• Start-up, connecons and jumpers
For instrument start-up follow the steps listed at secon 1.7. Signal
connecons are indicated at secon 1.5. Locaon for internal
jumpers is indicated at secon 1.9.
See below connecons for NTC probe :
1.14 Measuring with NTC probes
NTC ‘R
25
’
(congurable)*
Jumper ‘S’
(see secon 1.9)
Jumper ‘T’
(see secon 1.9)
Range
of measure
Accuracy
(% of reading)
Connecon
( terminals)
Beta
(congurable)
10K F K 4-5
from -60 º C
to 150
º C
<1.5% of
reading
2 (NTC +)
4 (NTC -)
3500
Table 13 - *‘Beta’ is congurable from 2000 to 5500. ‘R25’ is congurable from 1.0 K up to 200.0 K.
ntc +
ntc -
12345
1.15 Measuring with PTC probes
• Accepted PTC probes
The instrument accepts direct connecon of PTC
probes. Accepted PTC probes are listed at ‘Table 14’.
• Resoluon and units
The temperature resoluon using PTC temperature probes is
congurable to 1º or 0.1º. Reading can be congured in ºC (degrees
Celsius) or ºF (degrees Fahrenheit).
Family Sensor Jumper ‘S’
(see secon 1.9)
Jumper ‘T’
(see secon 1.9)
Range in ºC
(in ºF)
Total error
KTY 121
KTY81-121
KTY82-121
F
4-5
-55 / 150 ºC
(-67 / 302 ºF)
<1ºKTY 210
KTY81-210
KTY82-210
FHK
KTY 220
KTY81-220
KTY82-220
FHK
Table 14 - Ranges of temperature for PTC probes
• Sensor break detecon
In case of sensor break, the instrument will show ‘h.ovr’ or ‘h.udr’
(see Table 18) depending on the broken cable.
• Terminal 5 ‘mulfuncon’ - External control
Terminal 5 remains congured as ‘EK’ external control funcon. See
secon 1.9 for a list of available funcons.
ptc +
ptc -
12345
• Start-up, connecons and jumpers
For instrument start-up follow the steps listed at secon
1.7. Signal connecons are indicated at secon 1.5.
Locaon for internal jumpers is indicated at secon 1.9.
See below connecons for PTC probe :

Omega DP20 Specifications

General

Brand	Omega
Model	DP20
Category	Measuring Instruments
Language	English