Owner manual

2
IM 12B07C05-01E
2. GENERAL SPECIFICATIONS OF EXAxt PH450G
A) Inputs specs :Dualhighimpedanceinput(≥10
12
Ω)
(under referance conditions)
B) Input ranges
pH : -2 to 16 pH
 ORP : -1500to1500mV
rH : 0 to 100 rH
Temperature
- Pt1000 : -30 to 140ºC
- Pt100 : -30 to 140ºC
 -350Ω(DKK) : -30to140ºC
- 5k1 : -30 to 140ºC
- 6k8 : -30 to 140ºC
- PTC10k : -30 to 140ºC
- NTC 8k55 : -10 to 120ºC
- 3kBalco : -30 to 140ºC
C) Accuracy
pH input : ≤ 0.01 pH
 ORPinput : ≤ 1 mV
Temperature : ≤0.3ºC(≤0.4ºCforPt100)
 Stepresponse : <4secfor90%(pH7-pH4)
Note on performance specifications
The following tolerance is added to above performance.
mA output tolerance: ±0.02 mA of “4-20 mA“
D) Transmission signals
General : Two isolated outputs of 4-20 mA. DC with common negative. Maximum
load600Ω.Bi-directionalHART
®
digital communication, superimposed
on mA1 (4-20 mA) signal
 Outputfunctions : LinearorNonlinear(21-steptable)outputforpH,temperature,ORPorrH
Control function : PID control
Burnout function : Burn up (21.0 mA) or burn down (3.6 mA) to signal failure acc.
NAMURNE43
Adjustable damping. Expire time
Hold : The mA-outputs are frozen to the last/fixed value during calibration/
commissioning
E) Contact outputs
 General :FourSPDTrelaycontactswithdisplayindicators
 Switchcapacity :Maximumvalues100VA,250VAC,5Amps.(*)
Maximum values 50 Watts, 250 VDC, 5 Amps.(*)
 Status :High/Lowprocessalarms,selectedfrompH,ORP,rHandtemperature
Configurable delay time and hysteresis
Failureannunciation
 Controlfunction :On/Off,PIDdutycycleorpulsedfrequencycontrol
Wash : Contact can be used to start manual- or interval time wash cycles
Hold : Contact can be used to signal the Hold situation.
 Fail :ContactS4isprogrammedasfail-safecontact
(*)Note:Whencontactoutputcurrentismorethan4Amps.ambienttemperatureshouldbe
less than 40ºC.