Instructions

UM-0085-B09 DT80 Range User Manual Page 380
RG
Accuracy
Maximum measurement error is given by:
 =
(
 
)
+ (  . %)
where Basic Accuracy is as specified in the following table:
Measurement
5ºC to 40ºC
-40ºC to 70ºC
DC voltage measurement (up to ±30 V)
±0.1%
±0.35%
DC voltage measurement (±50 V – Series 4 only)
±0.15%
±0.35%
DC current measurement
±0.15%
±0.45%
DC resistance measurement (up to10,000 Ω)
±0.1%
±0.35%
DC resistance measurement (1,000,000 Ω – Series 4 only)
±0.5%
±1%
Frequency measurement ±0.1% ±0.25%
DAC Converter
±0.02%
±0.05%
Input Characteristics
Limit
min
typ
max
unit
Input terminal voltage
-50
-
50
V
Common mode voltage -3.5 - 3.5 V
Common mode voltage, attenuators enabled
-30
-
30
V
Input impedance
100M
-
-
Ω
Input impedance, attenuators enabled
160k
-
-
Ω
Inter-channel isolation (relay)
100
-
-
V
Analog/digital isolation (opto) 100 - - V
Internal shunt resistance
-
100
-
Ω
Sample rate
-
-
45
Hz
Common mode rejection
90
-
-
dB
Line series mode rejection
35
-
-
dB
Effective resolution
-
-
18
bits
Warning: Exceeding input voltage limits may cause permanent damage.
.Excitation
• Voltage source, 4.5V
• Precision current sources: 2μA, 213μA or 2.5mA
• Switched external excitation input
• General purpose switchable 12V regulated power output for powering sensors & accessories. (max 150mA)
• Isolated switchable 5V regulated power output (max 25mA) (Series 3 only)
• Switchable 12V/5V regulated power output (max 350mA) (Series 4 only)
• Isolated 16-bit voltage 0-10V, current 0-24mA output DAC converter (Series 4 only)
Digital Inputs and Outputs
Max Number of I/O
Input Type
DT81
DT82E
DT82I
DT80
DT85
DT85/85L
Open drain digital input/outputs, pull-up 3 3 4 4 4 4
Logic input/outputs. tri-stateable, pull-down 1 1 - 4 4 4
Relay contact outputs 1 1 1 1 1 1
User LED outputs (Attn) 1 1 1 1 1 1
Low speed counter (shared with digital I/O) 4 4 4 8 8 8
High speed counter with TTL-level or low threshold 2 2 2 2 2 2
High speed counter with TTL-level 2 2 2 2 2 2
High speed counter with TTL-level (shared with digital I/O) - - - - - 3
Phase encoder (shared with high speed counter) 1 - 2 2 2 3