Input Unit Specifications - GRAPHTEC GL400 User Manual

Input Unit Specifications

Number of input channels
Input method
Scan speed
Measurement ranges
Measurement accuracy
(23°C ±3°C)
when 30 minutes have
elapsed after the power
was switched on
(filter On, 1-s sampling)
Reference contact
compensation accuracy
A/D converter
Temperature coefficient
Input resistance
Allowable signal source
resistance
Maximum permissible
input voltage
Withstand voltage
Insulation resistance
Common mode rejection
ratio
Noise
Filter
External filter
*1 When On has been selected, the average value is 20 data samples.
*2 When the External filter is used
When the external filter has been set to ON, a hardware filter operates automatically. The filter selected depends on the
sampling speed. Please see the table below for details. Moreover, combining the hardware filter with the software filter
further increases the effectiveness of noise elimination.
Caution: At this time, since the scanning interval between channels is extended, the time lag between channels increases.
Example: When measurement is performed at the rate of 10s/10ch.
Maximum No.
of channels
10
20
40
50
100
Hardware filter settings:
Off: Off, Filter1: 20kHz, Filter2: 2kHz, Filter3: 200Hz
Item
10 channels/terminal unit (2 units mountable for a maximum of 20 channels)
Photo MOS relay scanning system; all channels isolated
0.1s/10 ch maximum
Voltage: 20, 50, 100, 500 mV; 1, 2, 5, 10, 20, 50 V; 1-5 V F.S.
Temperature
• Thermocouples: K, J, E, T, R, S, B, N, W (WRe5-26)
• Resistance temperature detector: Pt100, Jpt100
Voltage: 0.1% of F.S.
Temperature: Add ±1°C to the following values when the contact compensation
is internal.
Thermocouple Measurement Temperature Range (° ° ° ° ° C)
R/S
B
K/E/T
J
N
W
RTD
±1°C (internal/external switching)
16 bits (out of which 14 are internally acknowledged)
Gain: 0.01% of F.S./ °C
1 MΩ ±5%
Within 300 Ω
Between +/– terminals: 60 Vp-p
Between input terminals and casing: 60 Vp-p
Between input terminals and casing: 1 minute at 350 Vp-p
At least 50 MΩ (at 500 VDC)
At least 90 dB (50/60 Hz; signal source 300 Ω or less)
At least 48 dB (with +/– terminals shorted)
On* 1 , Off (software filter)
2
On* , Off
Hardware filter OFF: Scanning of channels 1 to 10 is performed in 100 ms (a time lag of 10 ms between channels)
Hardware filter ON: Scanning of channels 1 to 10 is performed in 10 s (a time lag of 1 s between channels)
100m 200m 500m 1s
Off Filter1
← ←
Off ← ←
Off ←
Off
←
Off
Description
0 ≤ Ts ≤ 100
100 < Ts ≤ 300
300 < Ts ≤ 1760
400 ≤ Ts ≤ 600
600 < Ts ≤ 1820
–200 ≤ Ts ≤ –100
–100 < Ts ≤ MAX
<MAX>
1370(K), 800(E), 400(T)
–200 ≤ Ts ≤ –100
–100 < Ts ≤ 100
100 < Ts ≤ 1100
0 ≤ Ts ≤ 1300
0 ≤ Ts ≤ 2315
Pt100-200 to 850
JPt100-200 to 500
Sampling speed
2s 5s 10s 20s 30s
Filter2
← ← ← ←
Filter1 ← ← Filter2 ←
← Filter1 ← ← ←
Filter1
← ← ← ←
Filter1
← ← ← ←
Measurement Accuracy
±5.2°C
±3.0C
± (0.05% of rdg +2)°C
±3.5C
± (0.05% of rdg +2°C)
± (0.05% of rdg +2°C)
± (0.05% of rdg +1°C)
±2.7°C
±1.7°C
± (0.05% of rdg +1°C)
± (0.1% of rdg +1°C)
± (0.1% of rdg +1.5°C)
± (0.05% of F.S. +0.5°C)
Pt: F.S. = 1050°C
JPt: F.S. = 700°C
1min 2min 5min 10min 20min 30min
Filter3
← ← ← ←
← Filter3 ← ← ←
Filter2 ← Filter3 ← ←
Filter2 Filter3
← ← ←
Filter2 Filter3
← ← ←
Specifications
1h
← ←
← ←
← ←
← ←
← ←
5-3