Endura APA592
pH / Redox (ORP) transmitter
10 Specification
OI/APA592–EN Rev. E
91
Output
Signal
Minimum Span
1 pH / 100mV
Maximum Span
14 pH / 3000 mV
Damping
Adjustable 0.0 to 99 seconds
Power Supply (Polarity Safe)
Supply Voltage
U
s
= 12 to 42 V DC (Non-intrinsically safe installations)
U
s
= 12 to 30 V DC (Intrinsically safe and Ex ia installations)
Maximum Permissible Ripple
Maximum ripple for supply voltage during communication in accordance with HART FSK physical layer specification,
version 8.1 (08/1999) section 8.1
Under-voltage Protection
U
Terminal-Mu
< 12 V results in I
a
= 3.8 mA
Maximum Load
Rload = (supply voltage – 12 V) / 22 mA
Max. load
depending on supply voltage (V DC)
Configurable
4 to 20 mA (standard with HART)
User-programmable linear and non-linear across the entire range
Dynamic range
3.9 to 20.75 mA
(3.8 mA = low alarm level, 21.5 mA = high alarm level)
Fig. 10.1 Maximum Load
500
1000
1360
795
225
12 17
42
A
B
C
20
40
30
B
C
A
V DC
A
APA592
transmitter
B
APA592 in Ex ia Design
C
HART communication – resistor
