Readjustment of the current loop (dvr 4s) – VACUUBRAND DVR 4S User Manual
Page 15
page 15 of 20
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 99 90 72 / 13/08/2005
To decrease the displayed value:
Press key MODE to change arrow direction to the
left.
Press key UP/DOWN to decrease the value dis-
played at the current measuring device.
Press key ON/OFF to confirm adjustment and to
terminate mode.
Readjustment of the current loop (DVR 4S)
The equipment has been adjusted at the factory to 4 mA at 0 mbar and 20 mA at 1080 mbar:
Depending on application and/or accuracy requirements a readjustment may become necessary.
Before readjustment
Wire the current loop correctly, provide a suitable current measuring device, connect an external voltage
supply and switch on (see description of the current loop).
Warning: Connect the vacuum gauge in accordance with all applicable regulations and the permitted
connection parameters.
Starting the adjustment mode
Adjustment at 4 mA
Press key UP/DOWN to adjust the current value at 0 mbar.
☞ Read the value at the external current measuring device.
☞ Setting range 2 .... 8 mA.
To decrease the value displayed at the current
measuring device:
Press key MODE to change arrow direction to the
left.
Press key UP/DOWN to decrease the value dis-
played at the current measuring device.
Press key ON/OFF to confirm the value actually
displayed at the current measuring device.
+
+
Press key UP/DOWN simultaneously with keys
ON/OFF and MODE.
☞ The vacuum gauge switches to mode ”Adjust-
ment of the current loop”.
☞ The warning triangle, I_LO and an arrow in right
direction are displayed.
Attention: If a pressure value is displayed, the
mode ”Adjustment at atmospheric pressure” has
been activated (key UP/DOWN pressed simulta-
neously with key ON/OFF).
☞ Press key ON/OFF to terminate the mode.
☞ The warning triangle, I_HI and an arrow in right
direction are displayed.
Press key UP/DOWN to change the current value
at 1080 mbar.
☞ Read the value at the current measuring de-
vice.
☞ Setting range 15 .... 25 mA.
Adjustment at 20 mA