Omega Vehicle Security DP97 - Manual (Page 19)

General
Range/Sensor type
Pt100 to IEC 751 (ITS 90 refers). –199.99 to 849.99°C.R
o
=
100
Ω
. Two input channels, each 3 or 4 wire connection with
automatic recognition (with manual overrride).
Overall Instrument
±0.02°C ± 1 digit for range -200°C to +500°C.
Accuracy (4 wire) ±0.005% reading ± 1 digit for range 500°C to 850°C.
Overall System
Better than ±0.04°C with TM-l250 precision probe accuracy
(4 wire) from -50°C to +250°C with 5 point NAMAS
calibration.
Linearisation
Conformity
±0.01°C.
Stability
(vs ambient
temperature)
0.0025°C/°C ambient change.
Warm-up Time
Negligible under normal ambient conditions. Allow 5 to 10
minutes for full stability unless stored at low temperature,
then allow 30 minutes minimum.
Pt100 Sensor Current
0.5mA nominal.
Display Resolution
0.01°C, K, °F,
Ω
.
Measurement Units
°C, °F, K,
Ω
(user selectable).
Measurement Modes
Input A or B or A-B (differential). Null facility in A-B mode.
Custom Calibration
(via PC software)
Up to 10 calibration values can be allocated to (via PC
software) channels A and B. Values are retained in non-
volatile memory until replaced by user.
Null Function
Corrects differential temperature readout between the two
Sensors to zero.
Sensor Lead
Resistance
25
Ω
each lead maximum.
Page 17
Supply
Internal rechargeable batteries. Mains 110/240V 50/60Hz,
adapter included. Battery charge life up to 12 hours with full
charge dependent on pattern of usage.