Omega DP20 User Manual

11
DP20 Economical Multisignal meter Instruction Manual
1.13 Measuring with Pt and Ni probes
• Accepted Pt and Ni probes
The instrument accepts connecon of Pt100, Pt500 and
Pt1000 temperature probes, and also Ni100, Ni200 and
Ni1000 temperature probes. Temperature ranges for
each type of probe are indicated on ‘Table 11’ below.
• Pt100 with 2 and 3 wires
The instrument accepts connecon for 2 and 3 wire Pt100 probes.
For 3 wire Pt100 probes, congure internal jumper ‘T’ at posion
5-6 (see secon 1.9). For 2 wire Pt100 probes, congure internal
jumper ‘T’ at posion 4-5. Compensaon of the wire resistance for 2
wire probes can be manually congured with the parameter ‘Oset
reading’ (‘oFFS’) (see secon 1.21) which allows to congure a xed
number of counts to be added to the reading.
• Resoluon and units
The temperature resoluon using Pt and Ni temperature probes is
congurable to 1º or 0.1º. Reading can be congured in ºC (degrees
Celsius) or ºF (degrees Fahrenheit).
• 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.
• Alpha temperature coecient
The instrument accepts Pt probes (Pt100, Pt500, Pt1000) with
‘Alpha’ parameter of ‘0.0385’ and ‘0.0390’ (see secon 1.28.7). This
parameter is associated to the specic model of probe installed.
Sensor Jumper ‘S’
(see secon 1.9)
Jumper ‘T’
(see secon 1.9)
Range in ºC
(in ºF)
Total error Connecon
( terminals)
Current at
sensor
Pt100 3 wires F H J 5-6
-200 / 700 ºC
(-328 / 1292 ºF)
<1º
2 (Pt+)
4 (Pt -)
5 (sense)
< 900 uA
Pt100 2 wires F H
4-5
-200 / 700 ºC
(-328 / 1292 ºF)
2 (Pt+, Ni+)
4 (Pt -, Ni-)
Pt500 F
-150 / 630 ºC
(-238 / 1166 ºF)
< 90 uA
Pt1000 F
-190 / 630 ºC
(-310 / 1166 ºF)
< 90 uA
Ni100 F H
-60 / 180 ºC
(-76 / 356 ºF)
< 900 uA
Ni200 F H
-60 / 120 ºC
(-76 / 248 ºF)
< 900 uA
Ni1000 F
-60 / 180 ºC
(-76 / 356 ºF)
< 90 uA
Table 11 - Ranges of temperature for Pt and Ni probes
• Terminal 5 ‘mulfuncon’ - ‘Pt100 3 wire’ or ‘External control’
To congure for 3 wire Pt100 probes, set internal jumper ‘T’ at
posion 5-6 (see secon 1.9). Terminal 5 will be assigned to the
connecon of the third wire of the Pt100 probe, for automac wire
resistance compensaon purposes, up to 30 R.
To congure for 2 wire Pt100 probes, set internal jumper ‘T’ at
posion 4-5 (see secon 1.9). Terminal 5 will be 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 a list of typical connecons :
Pt+, Ni+
Pt-, Ni-
12345
• other probes 2 wires • Pt100 3 wires
Pt-
Sense
Pt+
12345

Omega DP20 Specifications

General

Brand	Omega
Model	DP20
Category	Measuring Instruments
Language	English