Ecom Instruments Ex-Pt 720 User Manual
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Pressing the >Hold-pushbutton< switches between °C and °F.
Should no pushbutton be pressed for 5 seconds after a changeo-
ver, then the new measuring value will be accepted.
7.2.5 Switching-off
Switch the unit of with the >I/O pushbutton< . The display is no
longer active.
7.3 Battery change
Should the <BAT> symbol be displayed constantly, then the bat-
tery will need to be changed within the next 1-2 hours. The unit
switches itself automatically off should the battery voltage be too
low.
Open the back of the unit by unscrewing it, remove the exhausted
battery and insert a new one (observe polarity).
- while changing the battery, the cover may not be separated from
t˝˝
the unit top shell.
- only batteries of Type 6LR61 as per IEC may be used. The use of
al
alternative types of batteries is strictly forbidden.
- batteries may only be changed outside the Ex-area.
- the taking of additional batteries into the Ex-area is not allowed.
7.4 Temperature probes
7.4.1 Standard probes
Immersion / insertion probe
0628 1232:
measurement range:-50 ... 400°C
accuracy:
class A
Ex-Zones:
2, 1
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 30mm x 3,2mm (w x ø)
response time (99%): 12 Sec.
Surface probe
0628 1932:
measurement range:-50 ... 400°C
accuracy:
class B
Ex-Zones:
2, 1
probe dimensions: 110mm x 4mm (w x ø)
sensor dimensions: 3,2mm (ø)
response time (99%):40 Sec.
Stainless-steel probe
0628 2232:
measurement range:-50 ... 400°C
accuracy:
class A
Ex-Zones:
2, 1, 0
probe dimensions: 125mm x 4mm (w x ø)
sensor dimensions: 15 x 3mm (w x ø)
response time (99%):10 Sec
7.4.2 Special probes
Immersion / insertion probe
0600 9999
measurement range:-50 ... 400°C
0628 1232:
accuracy:
class A
Ex-Zones:
2, 1
probe dimensions: >50mm x >4mm (w x ø)
sensor dimensions: >30mm x >3,2mm (w x ø)
response time (99%):12 Sec.
Surface probe
0600 9999
measurement range:-50 ... 400°C
0628 1932:
accuracy:
class B
Ex-Zones:
2, 1
probe dimensions: >50 mm x >4mm (w x ø)
sensor dimensions: >9 mm (ø)
response time (99%):40 Sec.