Ecom Instruments Ex-Pt 720 instruction manual Operating instructions, Commissioning, Hold-Function

Operating life:	approx. 100h
Dimensions:	190 x 57 x 42 mm
Weight:	approx. 200g (with batteries)
Case material:	ABS
	(slight discolouration due to additives)
IP-protective rating: IP 54
EC-designation:	0102
Display:	LCD, digit height 14mm
Measuring device:	Pt 100-Sensor, 4-wire-technique
Measuring range:	-50°C to +400°C
Accuracy:	-50°C to +199,9°C:	±0,2°C, ±1 digit
	+200°C to +400°C:	±0,2% from measured
		value, ±1 digit
Resolution:	-50°C to +199,9°C:	0,1°C
	+200°C to +400°C:	1°C
System accuracy:	-50°C to +99,9°C:	±0,6°C, ±1 digit
(with immersion/	+100°C to +400°C:	±0,5% from measured
insertion sensor)
		value, ±1 digit

7. Operating instructions

Sensor connection

HOLD-button

I/O button

Safety loop for

use on Zone 0

reverse side: safety screw

7.1 Commissioning

-carefully read operating instructions.

-open back of unit with key.

-insert battery correctly (observe polarity).

-insert battery safety cover.

-close unit with safety screw.

7.2Switching-on and measuring 7.2.1 Switching-on

Insert sensor into measuring socket (take note of plug coding). Switch unit on with >I/O pushbutton<.

After switching on, a short display and function test will take place. The measuring instrument is now ready for use.

7.2.2 Hold-Function

The measured values can be retained in the display with the >Hold< pushbutton

7.2.3 Auto-Off-Function

The Auto-Off-Function switches the unit off after 10 minutes ope- rating time thus avoiding unintentional discharge of the battery.

7.2.4 Changing measuring range

The display can be switched between °C and °F.

While switching the unit on with the >I/O pushbutton< press >HOLD-pushbutton< and hold it.

After the self test is finished, the currently selected max. measu- ring value will blink.

°C

20 21